From 4d2ff2330f515b0a42b83113a201de48c0f38f7a Mon Sep 17 00:00:00 2001 From: Andrew Turner Date: Thu, 28 Jan 2021 10:39:38 +0000 Subject: [PATCH] Remove the old ARMv4 memcpy This was only used when building for ARMv4 or some ARMv5 or when _STANDALONE is defined. As ARMv4 and ARMv5 support has been removed, and we only define _STANDALONE in the bootloader where we don't use this version of memcpy we can remove it. Differential Revision: https://reviews.freebsd.org/D28313 --- lib/libc/arm/string/memcpy.S | 1376 ++++++++++++++++++++++++++- lib/libc/arm/string/memcpy_arm.S | 272 ------ lib/libc/arm/string/memcpy_xscale.S | 1375 -------------------------- 3 files changed, 1371 insertions(+), 1652 deletions(-) delete mode 100644 lib/libc/arm/string/memcpy_arm.S delete mode 100644 lib/libc/arm/string/memcpy_xscale.S diff --git a/lib/libc/arm/string/memcpy.S b/lib/libc/arm/string/memcpy.S index 3628652681e0..63390edeaa95 100644 --- a/lib/libc/arm/string/memcpy.S +++ b/lib/libc/arm/string/memcpy.S @@ -1,9 +1,1375 @@ -/* $NetBSD: memcpy.S,v 1.4 2003/10/14 07:51:45 scw Exp $ */ +/* $NetBSD: memcpy_xscale.S,v 1.1 2003/10/14 07:51:45 scw Exp $ */ + +/* + * Copyright 2003 Wasabi Systems, Inc. + * All rights reserved. + * + * Written by Steve C. Woodford for Wasabi Systems, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed for the NetBSD Project by + * Wasabi Systems, Inc. + * 4. The name of Wasabi Systems, Inc. may not be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ #include __FBSDID("$FreeBSD$"); -#if !defined(_ARM_ARCH_5E) || defined(_STANDALONE) -#include "memcpy_arm.S" -#else -#include "memcpy_xscale.S" + +.syntax unified + +/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */ +ENTRY(memcpy) + pld [r1] + cmp r2, #0x0c + ble .Lmemcpy_short /* <= 12 bytes */ + mov r3, r0 /* We must not clobber r0 */ + + /* Word-align the destination buffer */ + ands ip, r3, #0x03 /* Already word aligned? */ + beq .Lmemcpy_wordaligned /* Yup */ + cmp ip, #0x02 + ldrb ip, [r1], #0x01 + sub r2, r2, #0x01 + strb ip, [r3], #0x01 + ldrble ip, [r1], #0x01 + suble r2, r2, #0x01 + strble ip, [r3], #0x01 + ldrblt ip, [r1], #0x01 + sublt r2, r2, #0x01 + strblt ip, [r3], #0x01 + + /* Destination buffer is now word aligned */ +.Lmemcpy_wordaligned: + ands ip, r1, #0x03 /* Is src also word-aligned? */ + bne .Lmemcpy_bad_align /* Nope. Things just got bad */ + + /* Quad-align the destination buffer */ + tst r3, #0x07 /* Already quad aligned? */ + ldrne ip, [r1], #0x04 + stmfd sp!, {r4-r9} /* Free up some registers */ + subne r2, r2, #0x04 + strne ip, [r3], #0x04 + + /* Destination buffer quad aligned, source is at least word aligned */ + subs r2, r2, #0x80 + blt .Lmemcpy_w_lessthan128 + + /* Copy 128 bytes at a time */ +.Lmemcpy_w_loop128: + ldr r4, [r1], #0x04 /* LD:00-03 */ + ldr r5, [r1], #0x04 /* LD:04-07 */ + pld [r1, #0x18] /* Prefetch 0x20 */ + ldr r6, [r1], #0x04 /* LD:08-0b */ + ldr r7, [r1], #0x04 /* LD:0c-0f */ + ldr r8, [r1], #0x04 /* LD:10-13 */ + ldr r9, [r1], #0x04 /* LD:14-17 */ + strd r4, [r3], #0x08 /* ST:00-07 */ + ldr r4, [r1], #0x04 /* LD:18-1b */ + ldr r5, [r1], #0x04 /* LD:1c-1f */ + strd r6, [r3], #0x08 /* ST:08-0f */ + ldr r6, [r1], #0x04 /* LD:20-23 */ + ldr r7, [r1], #0x04 /* LD:24-27 */ + pld [r1, #0x18] /* Prefetch 0x40 */ + strd r8, [r3], #0x08 /* ST:10-17 */ + ldr r8, [r1], #0x04 /* LD:28-2b */ + ldr r9, [r1], #0x04 /* LD:2c-2f */ + strd r4, [r3], #0x08 /* ST:18-1f */ + ldr r4, [r1], #0x04 /* LD:30-33 */ + ldr r5, [r1], #0x04 /* LD:34-37 */ + strd r6, [r3], #0x08 /* ST:20-27 */ + ldr r6, [r1], #0x04 /* LD:38-3b */ + ldr r7, [r1], #0x04 /* LD:3c-3f */ + strd r8, [r3], #0x08 /* ST:28-2f */ + ldr r8, [r1], #0x04 /* LD:40-43 */ + ldr r9, [r1], #0x04 /* LD:44-47 */ + pld [r1, #0x18] /* Prefetch 0x60 */ + strd r4, [r3], #0x08 /* ST:30-37 */ + ldr r4, [r1], #0x04 /* LD:48-4b */ + ldr r5, [r1], #0x04 /* LD:4c-4f */ + strd r6, [r3], #0x08 /* ST:38-3f */ + ldr r6, [r1], #0x04 /* LD:50-53 */ + ldr r7, [r1], #0x04 /* LD:54-57 */ + strd r8, [r3], #0x08 /* ST:40-47 */ + ldr r8, [r1], #0x04 /* LD:58-5b */ + ldr r9, [r1], #0x04 /* LD:5c-5f */ + strd r4, [r3], #0x08 /* ST:48-4f */ + ldr r4, [r1], #0x04 /* LD:60-63 */ + ldr r5, [r1], #0x04 /* LD:64-67 */ + pld [r1, #0x18] /* Prefetch 0x80 */ + strd r6, [r3], #0x08 /* ST:50-57 */ + ldr r6, [r1], #0x04 /* LD:68-6b */ + ldr r7, [r1], #0x04 /* LD:6c-6f */ + strd r8, [r3], #0x08 /* ST:58-5f */ + ldr r8, [r1], #0x04 /* LD:70-73 */ + ldr r9, [r1], #0x04 /* LD:74-77 */ + strd r4, [r3], #0x08 /* ST:60-67 */ + ldr r4, [r1], #0x04 /* LD:78-7b */ + ldr r5, [r1], #0x04 /* LD:7c-7f */ + strd r6, [r3], #0x08 /* ST:68-6f */ + strd r8, [r3], #0x08 /* ST:70-77 */ + subs r2, r2, #0x80 + strd r4, [r3], #0x08 /* ST:78-7f */ + bge .Lmemcpy_w_loop128 + +.Lmemcpy_w_lessthan128: + adds r2, r2, #0x80 /* Adjust for extra sub */ + ldmfdeq sp!, {r4-r9} + bxeq lr /* Return now if done */ + subs r2, r2, #0x20 + blt .Lmemcpy_w_lessthan32 + + /* Copy 32 bytes at a time */ +.Lmemcpy_w_loop32: + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + pld [r1, #0x18] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr r8, [r1], #0x04 + ldr r9, [r1], #0x04 + strd r4, [r3], #0x08 + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + strd r6, [r3], #0x08 + strd r8, [r3], #0x08 + subs r2, r2, #0x20 + strd r4, [r3], #0x08 + bge .Lmemcpy_w_loop32 + +.Lmemcpy_w_lessthan32: + adds r2, r2, #0x20 /* Adjust for extra sub */ + ldmfdeq sp!, {r4-r9} + bxeq lr /* Return now if done */ + + and r4, r2, #0x18 + rsbs r4, r4, #0x18 + addne pc, pc, r4, lsl #1 + nop + + /* At least 24 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + sub r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* At least 16 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + sub r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* At least 8 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + subs r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* Less than 8 bytes remaining */ + ldmfd sp!, {r4-r9} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + ldrge ip, [r1], #0x04 + strge ip, [r3], #0x04 + bxeq lr /* Return now if done */ + addlt r2, r2, #0x04 + ldrb ip, [r1], #0x01 + cmp r2, #0x02 + ldrbge r2, [r1], #0x01 + strb ip, [r3], #0x01 + ldrbgt ip, [r1] + strbge r2, [r3], #0x01 + strbgt ip, [r3] + bx lr + + +/* + * At this point, it has not been possible to word align both buffers. + * The destination buffer is word aligned, but the source buffer is not. + */ +.Lmemcpy_bad_align: + stmfd sp!, {r4-r7} + bic r1, r1, #0x03 + cmp ip, #2 + ldr ip, [r1], #0x04 + bgt .Lmemcpy_bad3 + beq .Lmemcpy_bad2 + b .Lmemcpy_bad1 + +.Lmemcpy_bad1_loop16: + mov r4, ip, lsr #8 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #24 + mov r5, r5, lsr #8 + orr r5, r5, r6, lsl #24 + mov r6, r6, lsr #8 + orr r6, r6, r7, lsl #24 + mov r7, r7, lsr #8 + orr r7, r7, ip, lsl #24 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad1: + subs r2, r2, #0x10 + bge .Lmemcpy_bad1_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x03 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad1_loop4: + mov r4, ip, lsr #8 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #24 + str r4, [r3], #0x04 + bge .Lmemcpy_bad1_loop4 + sub r1, r1, #0x03 + b .Lmemcpy_bad_done + +.Lmemcpy_bad2_loop16: + mov r4, ip, lsr #16 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #16 + mov r5, r5, lsr #16 + orr r5, r5, r6, lsl #16 + mov r6, r6, lsr #16 + orr r6, r6, r7, lsl #16 + mov r7, r7, lsr #16 + orr r7, r7, ip, lsl #16 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad2: + subs r2, r2, #0x10 + bge .Lmemcpy_bad2_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x02 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad2_loop4: + mov r4, ip, lsr #16 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #16 + str r4, [r3], #0x04 + bge .Lmemcpy_bad2_loop4 + sub r1, r1, #0x02 + b .Lmemcpy_bad_done + +.Lmemcpy_bad3_loop16: + mov r4, ip, lsr #24 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #8 + mov r5, r5, lsr #24 + orr r5, r5, r6, lsl #8 + mov r6, r6, lsr #24 + orr r6, r6, r7, lsl #8 + mov r7, r7, lsr #24 + orr r7, r7, ip, lsl #8 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad3: + subs r2, r2, #0x10 + bge .Lmemcpy_bad3_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x01 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad3_loop4: + mov r4, ip, lsr #24 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #8 + str r4, [r3], #0x04 + bge .Lmemcpy_bad3_loop4 + sub r1, r1, #0x01 + +.Lmemcpy_bad_done: + ldmfd sp!, {r4-r7} + adds r2, r2, #0x04 + bxeq lr + ldrb ip, [r1], #0x01 + cmp r2, #0x02 + ldrbge r2, [r1], #0x01 + strb ip, [r3], #0x01 + ldrbgt ip, [r1] + strbge r2, [r3], #0x01 + strbgt ip, [r3] + bx lr + + +/* + * Handle short copies (less than 16 bytes), possibly misaligned. + * Some of these are *very* common, thanks to the network stack, + * and so are handled specially. + */ +.Lmemcpy_short: +#ifndef _STANDALONE + add pc, pc, r2, lsl #2 + nop + bx lr /* 0x00 */ + b .Lmemcpy_bytewise /* 0x01 */ + b .Lmemcpy_bytewise /* 0x02 */ + b .Lmemcpy_bytewise /* 0x03 */ + b .Lmemcpy_4 /* 0x04 */ + b .Lmemcpy_bytewise /* 0x05 */ + b .Lmemcpy_6 /* 0x06 */ + b .Lmemcpy_bytewise /* 0x07 */ + b .Lmemcpy_8 /* 0x08 */ + b .Lmemcpy_bytewise /* 0x09 */ + b .Lmemcpy_bytewise /* 0x0a */ + b .Lmemcpy_bytewise /* 0x0b */ + b .Lmemcpy_c /* 0x0c */ #endif +.Lmemcpy_bytewise: + mov r3, r0 /* We must not clobber r0 */ + ldrb ip, [r1], #0x01 +1: subs r2, r2, #0x01 + strb ip, [r3], #0x01 + ldrbne ip, [r1], #0x01 + bne 1b + bx lr + +#ifndef _STANDALONE +/****************************************************************************** + * Special case for 4 byte copies + */ +#define LMEMCPY_4_LOG2 6 /* 64 bytes */ +#define LMEMCPY_4_PAD .align LMEMCPY_4_LOG2 + LMEMCPY_4_PAD +.Lmemcpy_4: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_4_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + str r2, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #3] /* BE:r2 = 3xxx LE:r2 = xxx3 */ + mov r3, r3, lsr #8 /* r3 = .210 */ + orr r3, r3, r2, lsl #24 /* r3 = 3210 */ + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldrh r3, [r1, #0x02] + ldrh r2, [r1] + orr r3, r2, r3, lsl #16 + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-3] /* BE:r3 = xxx0 LE:r3 = 0xxx */ + ldr r2, [r1, #1] /* BE:r2 = 123x LE:r2 = x321 */ + mov r3, r3, lsr #24 /* r3 = ...0 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + strb r2, [r0] + mov r3, r2, lsr #8 + mov r1, r2, lsr #24 + strb r1, [r0, #0x03] + strh r3, [r0, #0x01] + bx lr + LMEMCPY_4_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldrh r3, [r1, #0x02] /* LE:r3 = ..23 LE:r3 = ..32 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = .321 */ + mov r3, r3, lsr #8 /* r3 = ...3 */ + strh r2, [r0, #0x01] + strb r3, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + strh r2, [r0] + mov r3, r2, lsr #16 + strh r3, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #3] /* BE:r3 = 3xxx LE:r3 = xxx3 */ + mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ + strh r1, [r0] + mov r2, r2, lsr #24 /* r2 = ...2 */ + orr r2, r2, r3, lsl #8 /* r2 = xx32 */ + strh r2, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldrh r3, [r1, #0x02] + strh r2, [r0] + strh r3, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #1] /* BE:r3 = 123x LE:r3 = x321 */ + ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ + mov r1, r3, lsr #8 /* BE:r1 = .123 LE:r1 = .x32 */ + strh r1, [r0, #0x02] + mov r3, r3, lsl #8 /* r3 = 321. */ + orr r3, r3, r2, lsr #24 /* r3 = 3210 */ + strh r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 1100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + strb r2, [r0] + mov r3, r2, lsr #8 + mov r1, r2, lsr #24 + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldrh r3, [r1, #0x02] /* BE:r3 = ..23 LE:r3 = ..32 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = .321 */ + strh r2, [r0, #0x01] + mov r3, r3, lsr #8 /* r3 = ...3 */ + strb r3, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + + +/****************************************************************************** + * Special case for 6 byte copies + */ +#define LMEMCPY_6_LOG2 6 /* 64 bytes */ +#define LMEMCPY_6_PAD .align LMEMCPY_6_LOG2 + LMEMCPY_6_PAD +.Lmemcpy_6: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_6_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + ldrh r3, [r1, #0x04] + str r2, [r0] + strh r3, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #0x03] /* BE:r3 = 345x LE:r3 = x543 */ + mov r2, r2, lsr #8 /* r2 = .210 */ + orr r2, r2, r3, lsl #24 /* r2 = 3210 */ + mov r3, r3, lsr #8 /* BE:r3 = .345 LE:r3 = .x54 */ + str r2, [r0] + strh r3, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + mov r1, r3, lsr #16 /* r1 = ..54 */ + orr r2, r2, r3, lsl #16 /* r2 = 3210 */ + str r2, [r0] + strh r1, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ + ldr r3, [r1, #1] /* BE:r3 = 1234 LE:r3 = 4321 */ + ldr r1, [r1, #5] /* BE:r1 = 5xxx LE:r3 = xxx5 */ + mov r2, r2, lsr #24 /* r2 = ...0 */ + orr r2, r2, r3, lsl #8 /* r2 = 3210 */ + mov r1, r1, lsl #8 /* r1 = xx5. */ + orr r1, r1, r3, lsr #24 /* r1 = xx54 */ + str r2, [r0] + strh r1, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ + ldrh r2, [r1, #0x04] /* BE:r2 = ..45 LE:r2 = ..54 */ + mov r1, r3, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */ + strh r1, [r0, #0x01] + strb r3, [r0] + mov r3, r3, lsr #24 /* r3 = ...3 */ + orr r3, r3, r2, lsl #8 /* r3 = .543 */ + mov r2, r2, lsr #8 /* r2 = ...5 */ + strh r3, [r0, #0x03] + strb r2, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ + strb r2, [r0] + mov r3, r1, lsr #24 + strb r3, [r0, #0x05] + mov r3, r1, lsr #8 /* r3 = .543 */ + strh r3, [r0, #0x03] + mov r3, r2, lsr #8 /* r3 = ...1 */ + orr r3, r3, r1, lsl #8 /* r3 = 4321 */ + strh r3, [r0, #0x01] + bx lr + LMEMCPY_6_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldrh r2, [r1, #0x04] /* r2 = ..54 */ + ldr r3, [r1] /* r3 = 3210 */ + mov r2, r2, lsl #16 /* r2 = 54.. */ + orr r2, r2, r3, lsr #16 /* r2 = 5432 */ + strh r3, [r0] + str r2, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #3] /* BE:r2 = 345x LE:r2 = x543 */ + mov r1, r3, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ + mov r2, r2, lsl #8 /* r2 = 543. */ + orr r2, r2, r3, lsr #24 /* r2 = 5432 */ + strh r1, [r0] + str r2, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldr r3, [r1, #0x02] + strh r2, [r0] + str r3, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ + ldrb r1, [r1, #0x05] /* r1 = ...5 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + mov r1, r1, lsl #24 /* r1 = 5... */ + orr r1, r1, r2, lsr #8 /* r1 = 5432 */ + strh r3, [r0] + str r1, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldrh r1, [r1, #0x04] /* BE:r1 = ..45 LE:r1 = ..54 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = .321 */ + orr r2, r2, r1, lsl #24 /* r2 = 4321 */ + mov r1, r1, lsr #8 /* r1 = ...5 */ + str r2, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r1, lsl #8 /* r2 = 4321 */ + mov r1, r1, lsr #24 /* r1 = ...5 */ + str r2, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldr r3, [r1, #0x01] + ldrb r1, [r1, #0x05] + strb r2, [r0] + str r3, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + + +/****************************************************************************** + * Special case for 8 byte copies + */ +#define LMEMCPY_8_LOG2 6 /* 64 bytes */ +#define LMEMCPY_8_PAD .align LMEMCPY_8_LOG2 + LMEMCPY_8_PAD +.Lmemcpy_8: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_8_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + ldr r3, [r1, #0x04] + str r2, [r0] + str r3, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #0x03] /* BE:r2 = 3456 LE:r2 = 6543 */ + ldrb r1, [r1, #0x07] /* r1 = ...7 */ + mov r3, r3, lsr #8 /* r3 = .210 */ + orr r3, r3, r2, lsl #24 /* r3 = 3210 */ + mov r1, r1, lsl #24 /* r1 = 7... */ + orr r2, r1, r2, lsr #8 /* r2 = 7654 */ + str r3, [r0] + str r2, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ + orr r2, r2, r3, lsl #16 /* r2 = 3210 */ + mov r3, r3, lsr #16 /* r3 = ..54 */ + orr r3, r3, r1, lsl #16 /* r3 = 7654 */ + str r2, [r0] + str r3, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ + ldr r1, [r1, #0x05] /* BE:r1 = 567x LE:r1 = x765 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + mov r2, r2, lsr #24 /* r2 = ...4 */ + orr r2, r2, r1, lsl #8 /* r2 = 7654 */ + str r3, [r0] + str r2, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ + ldr r2, [r1, #0x04] /* BE:r2 = 4567 LE:r2 = 7654 */ + strb r3, [r0] + mov r1, r2, lsr #24 /* r1 = ...7 */ + strb r1, [r0, #0x07] + mov r1, r3, lsr #8 /* r1 = .321 */ + mov r3, r3, lsr #24 /* r3 = ...3 */ + orr r3, r3, r2, lsl #8 /* r3 = 6543 */ + strh r1, [r0, #0x01] + str r3, [r0, #0x03] + bx lr + LMEMCPY_8_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldr ip, [r1, #0x03] + ldrb r1, [r1, #0x07] + strb r2, [r0] + strh r3, [r0, #0x01] + str ip, [r0, #0x03] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ + strb r2, [r0] /* 0 */ + mov ip, r1, lsr #8 /* ip = ...7 */ + strb ip, [r0, #0x07] /* 7 */ + mov ip, r2, lsr #8 /* ip = ...1 */ + orr ip, ip, r3, lsl #8 /* ip = 4321 */ + mov r3, r3, lsr #8 /* r3 = .543 */ + orr r3, r3, r1, lsl #24 /* r3 = 6543 */ + strh ip, [r0, #0x01] + str r3, [r0, #0x03] + bx lr + LMEMCPY_8_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */ + ldrh r2, [r1, #0x05] /* BE:r2 = ..56 LE:r2 = ..65 */ + ldrb r1, [r1, #0x07] /* r1 = ...7 */ + strb r3, [r0] + mov r3, ip, lsr #16 /* BE:r3 = ..12 LE:r3 = ..43 */ + strh ip, [r0, #0x01] + orr r2, r3, r2, lsl #16 /* r2 = 6543 */ + str r2, [r0, #0x03] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ + mov r1, r2, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */ + strh r2, [r0] + orr r2, r1, r3, lsl #16 /* r2 = 5432 */ + mov r3, r3, lsr #16 /* r3 = ..76 */ + str r2, [r0, #0x02] + strh r3, [r0, #0x06] + bx lr + LMEMCPY_8_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ + ldrb ip, [r1, #0x07] /* ip = ...7 */ + mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ + strh r1, [r0] + mov r1, r2, lsr #24 /* r1 = ...2 */ + orr r1, r1, r3, lsl #8 /* r1 = 5432 */ + mov r3, r3, lsr #24 /* r3 = ...6 */ + orr r3, r3, ip, lsl #8 /* r3 = ..76 */ + str r1, [r0, #0x02] + strh r3, [r0, #0x06] + bx lr + LMEMCPY_8_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldr ip, [r1, #0x02] + ldrh r3, [r1, #0x06] + strh r2, [r0] + str ip, [r0, #0x02] + strh r3, [r0, #0x06] + bx lr + LMEMCPY_8_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #0x05] /* BE:r3 = 567x LE:r3 = x765 */ + ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ + ldrb ip, [r1] /* ip = ...0 */ + mov r1, r3, lsr #8 /* BE:r1 = .567 LE:r1 = .x76 */ + strh r1, [r0, #0x06] + mov r3, r3, lsl #24 /* r3 = 5... */ + orr r3, r3, r2, lsr #8 /* r3 = 5432 */ + orr r2, ip, r2, lsl #8 /* r2 = 3210 */ + str r3, [r0, #0x02] + strh r2, [r0] + bx lr + LMEMCPY_8_PAD + +/* + * 1100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + mov r1, r3, lsr #8 /* BE:r1 = .456 LE:r1 = .765 */ + strh r1, [r0, #0x05] + strb r2, [r0] + mov r1, r3, lsr #24 /* r1 = ...7 */ + strb r1, [r0, #0x07] + mov r2, r2, lsr #8 /* r2 = .321 */ + orr r2, r2, r3, lsl #24 /* r2 = 4321 */ + str r2, [r0, #0x01] + bx lr + LMEMCPY_8_PAD + +/* + * 1101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldrh r2, [r1, #0x01] /* BE:r2 = ..12 LE:r2 = ..21 */ + ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */ + ldrb r1, [r1, #0x07] /* r1 = ...7 */ + strb r3, [r0] + mov r3, ip, lsr #16 /* BE:r3 = ..34 LE:r3 = ..65 */ + strh r3, [r0, #0x05] + orr r2, r2, ip, lsl #16 /* r2 = 4321 */ + str r2, [r0, #0x01] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/* + * 1110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ + strb r2, [r0] + mov ip, r2, lsr #8 /* ip = ...1 */ + orr ip, ip, r3, lsl #8 /* ip = 4321 */ + mov r2, r1, lsr #8 /* r2 = ...7 */ + strb r2, [r0, #0x07] + mov r1, r1, lsl #8 /* r1 = .76. */ + orr r1, r1, r3, lsr #24 /* r1 = .765 */ + str ip, [r0, #0x01] + strh r1, [r0, #0x05] + bx lr + LMEMCPY_8_PAD + +/* + * 1111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldr ip, [r1, #0x01] + ldrh r3, [r1, #0x05] + ldrb r1, [r1, #0x07] + strb r2, [r0] + str ip, [r0, #0x01] + strh r3, [r0, #0x05] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/****************************************************************************** + * Special case for 12 byte copies + */ +#define LMEMCPY_C_LOG2 7 /* 128 bytes */ +#define LMEMCPY_C_PAD .align LMEMCPY_C_LOG2 + LMEMCPY_C_PAD +.Lmemcpy_c: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_C_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + ldr r3, [r1, #0x04] + ldr r1, [r1, #0x08] + str r2, [r0] + str r3, [r0, #0x04] + str r1, [r0, #0x08] + bx lr + LMEMCPY_C_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1, #0xb] /* r2 = ...B */ + ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */ + ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ + ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */ + mov r2, r2, lsl #24 /* r2 = B... */ + orr r2, r2, ip, lsr #8 /* r2 = BA98 */ + str r2, [r0, #0x08] + mov r2, ip, lsl #24 /* r2 = 7... */ + orr r2, r2, r3, lsr #8 /* r2 = 7654 */ + mov r1, r1, lsr #8 /* r1 = .210 */ + orr r1, r1, r3, lsl #24 /* r1 = 3210 */ + str r2, [r0, #0x04] + str r1, [r0] + bx lr + LMEMCPY_C_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */ + ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */ + orr r2, r2, r3, lsl #16 /* r2 = 3210 */ + str r2, [r0] + mov r3, r3, lsr #16 /* r3 = ..54 */ + orr r3, r3, ip, lsl #16 /* r3 = 7654 */ + mov r1, r1, lsl #16 /* r1 = BA.. */ + orr r1, r1, ip, lsr #16 /* r1 = BA98 */ + str r3, [r0, #0x04] + str r1, [r0, #0x08] + bx lr + LMEMCPY_C_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] /* r2 = ...0 */ + ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */ + ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */ + ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */ + orr r2, r2, r3, lsl #8 /* r2 = 3210 */ + str r2, [r0] + mov r3, r3, lsr #24 /* r3 = ...4 */ + orr r3, r3, ip, lsl #8 /* r3 = 7654 */ + mov r1, r1, lsl #8 /* r1 = BA9. */ + orr r1, r1, ip, lsr #24 /* r1 = BA98 */ + str r3, [r0, #0x04] + str r1, [r0, #0x08] + bx lr + LMEMCPY_C_PAD + +/* + * 0100: dst is 8-bit aligned (byte 1), src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ + ldr ip, [r1, #0x08] /* BE:ip = 89AB LE:ip = BA98 */ + mov r1, r2, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */ + strh r1, [r0, #0x01] + strb r2, [r0] + mov r1, r2, lsr #24 /* r1 = ...3 */ + orr r2, r1, r3, lsl #8 /* r1 = 6543 */ + mov r1, r3, lsr #24 /* r1 = ...7 */ + orr r1, r1, ip, lsl #8 /* r1 = A987 */ + mov ip, ip, lsr #24 /* ip = ...B */ + str r2, [r0, #0x03] + str r1, [r0, #0x07] + strb ip, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 0101: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 1) + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldr ip, [r1, #0x03] + strb r2, [r0] + ldr r2, [r1, #0x07] + ldrb r1, [r1, #0x0b] + strh r3, [r0, #0x01] + str ip, [r0, #0x03] + str r2, [r0, #0x07] + strb r1, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 0110: dst is 8-bit aligned (byte 1), src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */ + ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = 4321 */ + strh r2, [r0, #0x01] + mov r2, r3, lsr #8 /* r2 = .543 */ + orr r3, r2, ip, lsl #24 /* r3 = 6543 */ + mov r2, ip, lsr #8 /* r2 = .987 */ + orr r2, r2, r1, lsl #24 /* r2 = A987 */ + mov r1, r1, lsr #8 /* r1 = ...B */ + str r3, [r0, #0x03] + str r2, [r0, #0x07] + strb r1, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 0111: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 3) + */ + ldrb r2, [r1] + ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */ + ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */ + ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */ + strb r2, [r0] + strh r3, [r0, #0x01] + mov r3, r3, lsr #16 /* r3 = ..43 */ + orr r3, r3, ip, lsl #16 /* r3 = 6543 */ + mov ip, ip, lsr #16 /* ip = ..87 */ + orr ip, ip, r1, lsl #16 /* ip = A987 */ + mov r1, r1, lsr #16 /* r1 = ..xB */ + str r3, [r0, #0x03] + str ip, [r0, #0x07] + strb r1, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldr ip, [r1] /* BE:ip = 0123 LE:ip = 3210 */ + ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ + ldr r2, [r1, #0x08] /* BE:r2 = 89AB LE:r2 = BA98 */ + mov r1, ip, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */ + strh ip, [r0] + orr r1, r1, r3, lsl #16 /* r1 = 5432 */ + mov r3, r3, lsr #16 /* r3 = ..76 */ + orr r3, r3, r2, lsl #16 /* r3 = 9876 */ + mov r2, r2, lsr #16 /* r2 = ..BA */ + str r1, [r0, #0x02] + str r3, [r0, #0x06] + strh r2, [r0, #0x0a] + bx lr + LMEMCPY_C_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned (byte 1) + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ + mov ip, r2, lsr #8 /* BE:ip = .x01 LE:ip = .210 */ + strh ip, [r0] + ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */ + ldrb r1, [r1, #0x0b] /* r1 = ...B */ + mov r2, r2, lsr #24 /* r2 = ...2 */ + orr r2, r2, r3, lsl #8 /* r2 = 5432 */ + mov r3, r3, lsr #24 /* r3 = ...6 */ + orr r3, r3, ip, lsl #8 /* r3 = 9876 */ + mov r1, r1, lsl #8 /* r1 = ..B. */ + orr r1, r1, ip, lsr #24 /* r1 = ..BA */ + str r2, [r0, #0x02] + str r3, [r0, #0x06] + strh r1, [r0, #0x0a] + bx lr + LMEMCPY_C_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldr r3, [r1, #0x02] + ldr ip, [r1, #0x06] + ldrh r1, [r1, #0x0a] + strh r2, [r0] + str r3, [r0, #0x02] + str ip, [r0, #0x06] + strh r1, [r0, #0x0a] + bx lr + LMEMCPY_C_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned (byte 3) + */ + ldr r2, [r1, #0x09] /* BE:r2 = 9ABx LE:r2 = xBA9 */ + ldr r3, [r1, #0x05] /* BE:r3 = 5678 LE:r3 = 8765 */ + mov ip, r2, lsr #8 /* BE:ip = .9AB LE:ip = .xBA */ + strh ip, [r0, #0x0a] + ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */ + ldrb r1, [r1] /* r1 = ...0 */ + mov r2, r2, lsl #24 /* r2 = 9... */ + orr r2, r2, r3, lsr #8 /* r2 = 9876 */ + mov r3, r3, lsl #24 /* r3 = 5... */ + orr r3, r3, ip, lsr #8 /* r3 = 5432 */ + orr r1, r1, ip, lsl #8 /* r1 = 3210 */ + str r2, [r0, #0x06] + str r3, [r0, #0x02] + strh r1, [r0] + bx lr + LMEMCPY_C_PAD + +/* + * 1100: dst is 8-bit aligned (byte 3), src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldr ip, [r1, #0x04] /* BE:ip = 4567 LE:ip = 7654 */ + ldr r1, [r1, #0x08] /* BE:r1 = 89AB LE:r1 = BA98 */ + strb r2, [r0] + mov r3, r2, lsr #8 /* r3 = .321 */ + orr r3, r3, ip, lsl #24 /* r3 = 4321 */ + str r3, [r0, #0x01] + mov r3, ip, lsr #8 /* r3 = .765 */ + orr r3, r3, r1, lsl #24 /* r3 = 8765 */ + str r3, [r0, #0x05] + mov r1, r1, lsr #8 /* r1 = .BA9 */ + strh r1, [r0, #0x09] + mov r1, r1, lsr #16 /* r1 = ...B */ + strb r1, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 1101: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 1) + */ + ldrb r2, [r1, #0x0b] /* r2 = ...B */ + ldr r3, [r1, #0x07] /* BE:r3 = 789A LE:r3 = A987 */ + ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */ + ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */ + strb r2, [r0, #0x0b] + mov r2, r3, lsr #16 /* r2 = ..A9 */ + strh r2, [r0, #0x09] + mov r3, r3, lsl #16 /* r3 = 87.. */ + orr r3, r3, ip, lsr #16 /* r3 = 8765 */ + mov ip, ip, lsl #16 /* ip = 43.. */ + orr ip, ip, r1, lsr #16 /* ip = 4321 */ + mov r1, r1, lsr #8 /* r1 = .210 */ + str r3, [r0, #0x05] + str ip, [r0, #0x01] + strb r1, [r0] + bx lr + LMEMCPY_C_PAD + +/* + * 1110: dst is 8-bit aligned (byte 3), src is 16-bit aligned + */ + ldrh r2, [r1] /* r2 = ..10 */ + ldr r3, [r1, #0x02] /* r3 = 5432 */ + ldr ip, [r1, #0x06] /* ip = 9876 */ + ldrh r1, [r1, #0x0a] /* r1 = ..BA */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = 4321 */ + mov r3, r3, lsr #24 /* r3 = ...5 */ + orr r3, r3, ip, lsl #8 /* r3 = 8765 */ + mov ip, ip, lsr #24 /* ip = ...9 */ + orr ip, ip, r1, lsl #8 /* ip = .BA9 */ + mov r1, r1, lsr #8 /* r1 = ...B */ + str r2, [r0, #0x01] + str r3, [r0, #0x05] + strh ip, [r0, #0x09] + strb r1, [r0, #0x0b] + bx lr + LMEMCPY_C_PAD + +/* + * 1111: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 3) + */ + ldrb r2, [r1] + ldr r3, [r1, #0x01] + ldr ip, [r1, #0x05] + strb r2, [r0] + ldrh r2, [r1, #0x09] + ldrb r1, [r1, #0x0b] + str r3, [r0, #0x01] + str ip, [r0, #0x05] + strh r2, [r0, #0x09] + strb r1, [r0, #0x0b] + bx lr +#endif /* !_STANDALONE */ +END(memcpy) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libc/arm/string/memcpy_arm.S b/lib/libc/arm/string/memcpy_arm.S deleted file mode 100644 index 050ea8fb315f..000000000000 --- a/lib/libc/arm/string/memcpy_arm.S +++ /dev/null @@ -1,272 +0,0 @@ -/* $NetBSD: memcpy_arm.S,v 1.1 2003/10/14 07:51:45 scw Exp $ */ - -/*- - * Copyright (c) 1997 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Neil A. Carson and Mark Brinicombe - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include -__FBSDID("$FreeBSD$"); - -.syntax unified - -/* - * This is one fun bit of code ... - * Some easy listening music is suggested while trying to understand this - * code e.g. Iron Maiden - * - * For anyone attempting to understand it : - * - * The core code is implemented here with simple stubs for memcpy(). - * - * All local labels are prefixed with Lmemcpy_ - * Following the prefix a label starting f is used in the forward copy code - * while a label using b is used in the backwards copy code - * The source and destination addresses determine whether a forward or - * backward copy is performed. - * Separate bits of code are used to deal with the following situations - * for both the forward and backwards copy. - * unaligned source address - * unaligned destination address - * Separate copy routines are used to produce an optimised result for each - * of these cases. - * The copy code will use LDM/STM instructions to copy up to 32 bytes at - * a time where possible. - * - * Note: r12 (aka ip) can be trashed during the function along with - * r0-r3 although r0-r2 have defined uses i.e. src, dest, len through out. - * Additional registers are preserved prior to use i.e. r4, r5 & lr - * - * Apologies for the state of the comments ;-) - */ -/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */ -ENTRY(memcpy) - /* save leaf functions having to store this away */ - stmdb sp!, {r0, lr} /* memcpy() returns dest addr */ - - subs r2, r2, #4 - blt .Lmemcpy_l4 /* less than 4 bytes */ - ands r12, r0, #3 - bne .Lmemcpy_destul /* oh unaligned destination addr */ - ands r12, r1, #3 - bne .Lmemcpy_srcul /* oh unaligned source addr */ - -.Lmemcpy_t8: - /* We have aligned source and destination */ - subs r2, r2, #8 - blt .Lmemcpy_l12 /* less than 12 bytes (4 from above) */ - subs r2, r2, #0x14 - blt .Lmemcpy_l32 /* less than 32 bytes (12 from above) */ - stmdb sp!, {r4} /* borrow r4 */ - - /* blat 32 bytes at a time */ - /* XXX for really big copies perhaps we should use more registers */ -.Lmemcpy_loop32: - ldmia r1!, {r3, r4, r12, lr} - stmia r0!, {r3, r4, r12, lr} - ldmia r1!, {r3, r4, r12, lr} - stmia r0!, {r3, r4, r12, lr} - subs r2, r2, #0x20 - bge .Lmemcpy_loop32 - - cmn r2, #0x10 - ldmiage r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */ - stmiage r0!, {r3, r4, r12, lr} - subge r2, r2, #0x10 - ldmia sp!, {r4} /* return r4 */ - -.Lmemcpy_l32: - adds r2, r2, #0x14 - - /* blat 12 bytes at a time */ -.Lmemcpy_loop12: - ldmiage r1!, {r3, r12, lr} - stmiage r0!, {r3, r12, lr} - subsge r2, r2, #0x0c - bge .Lmemcpy_loop12 - -.Lmemcpy_l12: - adds r2, r2, #8 - blt .Lmemcpy_l4 - - subs r2, r2, #4 - ldrlt r3, [r1], #4 - strlt r3, [r0], #4 - ldmiage r1!, {r3, r12} - stmiage r0!, {r3, r12} - subge r2, r2, #4 - -.Lmemcpy_l4: - /* less than 4 bytes to go */ - adds r2, r2, #4 -#ifdef __APCS_26_ - ldmiaeq sp!, {r0, pc}^ /* done */ -#else - ldmiaeq sp!, {r0, pc} /* done */ -#endif - /* copy the crud byte at a time */ - cmp r2, #2 - ldrb r3, [r1], #1 - strb r3, [r0], #1 - ldrbge r3, [r1], #1 - strbge r3, [r0], #1 - ldrbgt r3, [r1], #1 - strbgt r3, [r0], #1 - ldmia sp!, {r0, pc} - - /* erg - unaligned destination */ -.Lmemcpy_destul: - rsb r12, r12, #4 - cmp r12, #2 - - /* align destination with byte copies */ - ldrb r3, [r1], #1 - strb r3, [r0], #1 - ldrbge r3, [r1], #1 - strbge r3, [r0], #1 - ldrbgt r3, [r1], #1 - strbgt r3, [r0], #1 - subs r2, r2, r12 - blt .Lmemcpy_l4 /* less the 4 bytes */ - - ands r12, r1, #3 - beq .Lmemcpy_t8 /* we have an aligned source */ - - /* erg - unaligned source */ - /* This is where it gets nasty ... */ -.Lmemcpy_srcul: - bic r1, r1, #3 - ldr lr, [r1], #4 - cmp r12, #2 - bgt .Lmemcpy_srcul3 - beq .Lmemcpy_srcul2 - cmp r2, #0x0c - blt .Lmemcpy_srcul1loop4 - sub r2, r2, #0x0c - stmdb sp!, {r4, r5} - -.Lmemcpy_srcul1loop16: - mov r3, lr, lsr #8 - ldmia r1!, {r4, r5, r12, lr} - orr r3, r3, r4, lsl #24 - mov r4, r4, lsr #8 - orr r4, r4, r5, lsl #24 - mov r5, r5, lsr #8 - orr r5, r5, r12, lsl #24 - mov r12, r12, lsr #8 - orr r12, r12, lr, lsl #24 - stmia r0!, {r3-r5, r12} - subs r2, r2, #0x10 - bge .Lmemcpy_srcul1loop16 - ldmia sp!, {r4, r5} - adds r2, r2, #0x0c - blt .Lmemcpy_srcul1l4 - -.Lmemcpy_srcul1loop4: - mov r12, lr, lsr #8 - ldr lr, [r1], #4 - orr r12, r12, lr, lsl #24 - str r12, [r0], #4 - subs r2, r2, #4 - bge .Lmemcpy_srcul1loop4 - -.Lmemcpy_srcul1l4: - sub r1, r1, #3 - b .Lmemcpy_l4 - -.Lmemcpy_srcul2: - cmp r2, #0x0c - blt .Lmemcpy_srcul2loop4 - sub r2, r2, #0x0c - stmdb sp!, {r4, r5} - -.Lmemcpy_srcul2loop16: - mov r3, lr, lsr #16 - ldmia r1!, {r4, r5, r12, lr} - orr r3, r3, r4, lsl #16 - mov r4, r4, lsr #16 - orr r4, r4, r5, lsl #16 - mov r5, r5, lsr #16 - orr r5, r5, r12, lsl #16 - mov r12, r12, lsr #16 - orr r12, r12, lr, lsl #16 - stmia r0!, {r3-r5, r12} - subs r2, r2, #0x10 - bge .Lmemcpy_srcul2loop16 - ldmia sp!, {r4, r5} - adds r2, r2, #0x0c - blt .Lmemcpy_srcul2l4 - -.Lmemcpy_srcul2loop4: - mov r12, lr, lsr #16 - ldr lr, [r1], #4 - orr r12, r12, lr, lsl #16 - str r12, [r0], #4 - subs r2, r2, #4 - bge .Lmemcpy_srcul2loop4 - -.Lmemcpy_srcul2l4: - sub r1, r1, #2 - b .Lmemcpy_l4 - -.Lmemcpy_srcul3: - cmp r2, #0x0c - blt .Lmemcpy_srcul3loop4 - sub r2, r2, #0x0c - stmdb sp!, {r4, r5} - -.Lmemcpy_srcul3loop16: - mov r3, lr, lsr #24 - ldmia r1!, {r4, r5, r12, lr} - orr r3, r3, r4, lsl #8 - mov r4, r4, lsr #24 - orr r4, r4, r5, lsl #8 - mov r5, r5, lsr #24 - orr r5, r5, r12, lsl #8 - mov r12, r12, lsr #24 - orr r12, r12, lr, lsl #8 - stmia r0!, {r3-r5, r12} - subs r2, r2, #0x10 - bge .Lmemcpy_srcul3loop16 - ldmia sp!, {r4, r5} - adds r2, r2, #0x0c - blt .Lmemcpy_srcul3l4 - -.Lmemcpy_srcul3loop4: - mov r12, lr, lsr #24 - ldr lr, [r1], #4 - orr r12, r12, lr, lsl #8 - str r12, [r0], #4 - subs r2, r2, #4 - bge .Lmemcpy_srcul3loop4 - -.Lmemcpy_srcul3l4: - sub r1, r1, #1 - b .Lmemcpy_l4 -END(memcpy) - - .section .note.GNU-stack,"",%progbits diff --git a/lib/libc/arm/string/memcpy_xscale.S b/lib/libc/arm/string/memcpy_xscale.S deleted file mode 100644 index 63390edeaa95..000000000000 --- a/lib/libc/arm/string/memcpy_xscale.S +++ /dev/null @@ -1,1375 +0,0 @@ -/* $NetBSD: memcpy_xscale.S,v 1.1 2003/10/14 07:51:45 scw Exp $ */ - -/* - * Copyright 2003 Wasabi Systems, Inc. - * All rights reserved. - * - * Written by Steve C. Woodford for Wasabi Systems, Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed for the NetBSD Project by - * Wasabi Systems, Inc. - * 4. The name of Wasabi Systems, Inc. may not be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include -__FBSDID("$FreeBSD$"); - -.syntax unified - -/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */ -ENTRY(memcpy) - pld [r1] - cmp r2, #0x0c - ble .Lmemcpy_short /* <= 12 bytes */ - mov r3, r0 /* We must not clobber r0 */ - - /* Word-align the destination buffer */ - ands ip, r3, #0x03 /* Already word aligned? */ - beq .Lmemcpy_wordaligned /* Yup */ - cmp ip, #0x02 - ldrb ip, [r1], #0x01 - sub r2, r2, #0x01 - strb ip, [r3], #0x01 - ldrble ip, [r1], #0x01 - suble r2, r2, #0x01 - strble ip, [r3], #0x01 - ldrblt ip, [r1], #0x01 - sublt r2, r2, #0x01 - strblt ip, [r3], #0x01 - - /* Destination buffer is now word aligned */ -.Lmemcpy_wordaligned: - ands ip, r1, #0x03 /* Is src also word-aligned? */ - bne .Lmemcpy_bad_align /* Nope. Things just got bad */ - - /* Quad-align the destination buffer */ - tst r3, #0x07 /* Already quad aligned? */ - ldrne ip, [r1], #0x04 - stmfd sp!, {r4-r9} /* Free up some registers */ - subne r2, r2, #0x04 - strne ip, [r3], #0x04 - - /* Destination buffer quad aligned, source is at least word aligned */ - subs r2, r2, #0x80 - blt .Lmemcpy_w_lessthan128 - - /* Copy 128 bytes at a time */ -.Lmemcpy_w_loop128: - ldr r4, [r1], #0x04 /* LD:00-03 */ - ldr r5, [r1], #0x04 /* LD:04-07 */ - pld [r1, #0x18] /* Prefetch 0x20 */ - ldr r6, [r1], #0x04 /* LD:08-0b */ - ldr r7, [r1], #0x04 /* LD:0c-0f */ - ldr r8, [r1], #0x04 /* LD:10-13 */ - ldr r9, [r1], #0x04 /* LD:14-17 */ - strd r4, [r3], #0x08 /* ST:00-07 */ - ldr r4, [r1], #0x04 /* LD:18-1b */ - ldr r5, [r1], #0x04 /* LD:1c-1f */ - strd r6, [r3], #0x08 /* ST:08-0f */ - ldr r6, [r1], #0x04 /* LD:20-23 */ - ldr r7, [r1], #0x04 /* LD:24-27 */ - pld [r1, #0x18] /* Prefetch 0x40 */ - strd r8, [r3], #0x08 /* ST:10-17 */ - ldr r8, [r1], #0x04 /* LD:28-2b */ - ldr r9, [r1], #0x04 /* LD:2c-2f */ - strd r4, [r3], #0x08 /* ST:18-1f */ - ldr r4, [r1], #0x04 /* LD:30-33 */ - ldr r5, [r1], #0x04 /* LD:34-37 */ - strd r6, [r3], #0x08 /* ST:20-27 */ - ldr r6, [r1], #0x04 /* LD:38-3b */ - ldr r7, [r1], #0x04 /* LD:3c-3f */ - strd r8, [r3], #0x08 /* ST:28-2f */ - ldr r8, [r1], #0x04 /* LD:40-43 */ - ldr r9, [r1], #0x04 /* LD:44-47 */ - pld [r1, #0x18] /* Prefetch 0x60 */ - strd r4, [r3], #0x08 /* ST:30-37 */ - ldr r4, [r1], #0x04 /* LD:48-4b */ - ldr r5, [r1], #0x04 /* LD:4c-4f */ - strd r6, [r3], #0x08 /* ST:38-3f */ - ldr r6, [r1], #0x04 /* LD:50-53 */ - ldr r7, [r1], #0x04 /* LD:54-57 */ - strd r8, [r3], #0x08 /* ST:40-47 */ - ldr r8, [r1], #0x04 /* LD:58-5b */ - ldr r9, [r1], #0x04 /* LD:5c-5f */ - strd r4, [r3], #0x08 /* ST:48-4f */ - ldr r4, [r1], #0x04 /* LD:60-63 */ - ldr r5, [r1], #0x04 /* LD:64-67 */ - pld [r1, #0x18] /* Prefetch 0x80 */ - strd r6, [r3], #0x08 /* ST:50-57 */ - ldr r6, [r1], #0x04 /* LD:68-6b */ - ldr r7, [r1], #0x04 /* LD:6c-6f */ - strd r8, [r3], #0x08 /* ST:58-5f */ - ldr r8, [r1], #0x04 /* LD:70-73 */ - ldr r9, [r1], #0x04 /* LD:74-77 */ - strd r4, [r3], #0x08 /* ST:60-67 */ - ldr r4, [r1], #0x04 /* LD:78-7b */ - ldr r5, [r1], #0x04 /* LD:7c-7f */ - strd r6, [r3], #0x08 /* ST:68-6f */ - strd r8, [r3], #0x08 /* ST:70-77 */ - subs r2, r2, #0x80 - strd r4, [r3], #0x08 /* ST:78-7f */ - bge .Lmemcpy_w_loop128 - -.Lmemcpy_w_lessthan128: - adds r2, r2, #0x80 /* Adjust for extra sub */ - ldmfdeq sp!, {r4-r9} - bxeq lr /* Return now if done */ - subs r2, r2, #0x20 - blt .Lmemcpy_w_lessthan32 - - /* Copy 32 bytes at a time */ -.Lmemcpy_w_loop32: - ldr r4, [r1], #0x04 - ldr r5, [r1], #0x04 - pld [r1, #0x18] - ldr r6, [r1], #0x04 - ldr r7, [r1], #0x04 - ldr r8, [r1], #0x04 - ldr r9, [r1], #0x04 - strd r4, [r3], #0x08 - ldr r4, [r1], #0x04 - ldr r5, [r1], #0x04 - strd r6, [r3], #0x08 - strd r8, [r3], #0x08 - subs r2, r2, #0x20 - strd r4, [r3], #0x08 - bge .Lmemcpy_w_loop32 - -.Lmemcpy_w_lessthan32: - adds r2, r2, #0x20 /* Adjust for extra sub */ - ldmfdeq sp!, {r4-r9} - bxeq lr /* Return now if done */ - - and r4, r2, #0x18 - rsbs r4, r4, #0x18 - addne pc, pc, r4, lsl #1 - nop - - /* At least 24 bytes remaining */ - ldr r4, [r1], #0x04 - ldr r5, [r1], #0x04 - sub r2, r2, #0x08 - strd r4, [r3], #0x08 - - /* At least 16 bytes remaining */ - ldr r4, [r1], #0x04 - ldr r5, [r1], #0x04 - sub r2, r2, #0x08 - strd r4, [r3], #0x08 - - /* At least 8 bytes remaining */ - ldr r4, [r1], #0x04 - ldr r5, [r1], #0x04 - subs r2, r2, #0x08 - strd r4, [r3], #0x08 - - /* Less than 8 bytes remaining */ - ldmfd sp!, {r4-r9} - bxeq lr /* Return now if done */ - subs r2, r2, #0x04 - ldrge ip, [r1], #0x04 - strge ip, [r3], #0x04 - bxeq lr /* Return now if done */ - addlt r2, r2, #0x04 - ldrb ip, [r1], #0x01 - cmp r2, #0x02 - ldrbge r2, [r1], #0x01 - strb ip, [r3], #0x01 - ldrbgt ip, [r1] - strbge r2, [r3], #0x01 - strbgt ip, [r3] - bx lr - - -/* - * At this point, it has not been possible to word align both buffers. - * The destination buffer is word aligned, but the source buffer is not. - */ -.Lmemcpy_bad_align: - stmfd sp!, {r4-r7} - bic r1, r1, #0x03 - cmp ip, #2 - ldr ip, [r1], #0x04 - bgt .Lmemcpy_bad3 - beq .Lmemcpy_bad2 - b .Lmemcpy_bad1 - -.Lmemcpy_bad1_loop16: - mov r4, ip, lsr #8 - ldr r5, [r1], #0x04 - pld [r1, #0x018] - ldr r6, [r1], #0x04 - ldr r7, [r1], #0x04 - ldr ip, [r1], #0x04 - orr r4, r4, r5, lsl #24 - mov r5, r5, lsr #8 - orr r5, r5, r6, lsl #24 - mov r6, r6, lsr #8 - orr r6, r6, r7, lsl #24 - mov r7, r7, lsr #8 - orr r7, r7, ip, lsl #24 - str r4, [r3], #0x04 - str r5, [r3], #0x04 - str r6, [r3], #0x04 - str r7, [r3], #0x04 -.Lmemcpy_bad1: - subs r2, r2, #0x10 - bge .Lmemcpy_bad1_loop16 - - adds r2, r2, #0x10 - ldmfdeq sp!, {r4-r7} - bxeq lr /* Return now if done */ - subs r2, r2, #0x04 - sublt r1, r1, #0x03 - blt .Lmemcpy_bad_done - -.Lmemcpy_bad1_loop4: - mov r4, ip, lsr #8 - ldr ip, [r1], #0x04 - subs r2, r2, #0x04 - orr r4, r4, ip, lsl #24 - str r4, [r3], #0x04 - bge .Lmemcpy_bad1_loop4 - sub r1, r1, #0x03 - b .Lmemcpy_bad_done - -.Lmemcpy_bad2_loop16: - mov r4, ip, lsr #16 - ldr r5, [r1], #0x04 - pld [r1, #0x018] - ldr r6, [r1], #0x04 - ldr r7, [r1], #0x04 - ldr ip, [r1], #0x04 - orr r4, r4, r5, lsl #16 - mov r5, r5, lsr #16 - orr r5, r5, r6, lsl #16 - mov r6, r6, lsr #16 - orr r6, r6, r7, lsl #16 - mov r7, r7, lsr #16 - orr r7, r7, ip, lsl #16 - str r4, [r3], #0x04 - str r5, [r3], #0x04 - str r6, [r3], #0x04 - str r7, [r3], #0x04 -.Lmemcpy_bad2: - subs r2, r2, #0x10 - bge .Lmemcpy_bad2_loop16 - - adds r2, r2, #0x10 - ldmfdeq sp!, {r4-r7} - bxeq lr /* Return now if done */ - subs r2, r2, #0x04 - sublt r1, r1, #0x02 - blt .Lmemcpy_bad_done - -.Lmemcpy_bad2_loop4: - mov r4, ip, lsr #16 - ldr ip, [r1], #0x04 - subs r2, r2, #0x04 - orr r4, r4, ip, lsl #16 - str r4, [r3], #0x04 - bge .Lmemcpy_bad2_loop4 - sub r1, r1, #0x02 - b .Lmemcpy_bad_done - -.Lmemcpy_bad3_loop16: - mov r4, ip, lsr #24 - ldr r5, [r1], #0x04 - pld [r1, #0x018] - ldr r6, [r1], #0x04 - ldr r7, [r1], #0x04 - ldr ip, [r1], #0x04 - orr r4, r4, r5, lsl #8 - mov r5, r5, lsr #24 - orr r5, r5, r6, lsl #8 - mov r6, r6, lsr #24 - orr r6, r6, r7, lsl #8 - mov r7, r7, lsr #24 - orr r7, r7, ip, lsl #8 - str r4, [r3], #0x04 - str r5, [r3], #0x04 - str r6, [r3], #0x04 - str r7, [r3], #0x04 -.Lmemcpy_bad3: - subs r2, r2, #0x10 - bge .Lmemcpy_bad3_loop16 - - adds r2, r2, #0x10 - ldmfdeq sp!, {r4-r7} - bxeq lr /* Return now if done */ - subs r2, r2, #0x04 - sublt r1, r1, #0x01 - blt .Lmemcpy_bad_done - -.Lmemcpy_bad3_loop4: - mov r4, ip, lsr #24 - ldr ip, [r1], #0x04 - subs r2, r2, #0x04 - orr r4, r4, ip, lsl #8 - str r4, [r3], #0x04 - bge .Lmemcpy_bad3_loop4 - sub r1, r1, #0x01 - -.Lmemcpy_bad_done: - ldmfd sp!, {r4-r7} - adds r2, r2, #0x04 - bxeq lr - ldrb ip, [r1], #0x01 - cmp r2, #0x02 - ldrbge r2, [r1], #0x01 - strb ip, [r3], #0x01 - ldrbgt ip, [r1] - strbge r2, [r3], #0x01 - strbgt ip, [r3] - bx lr - - -/* - * Handle short copies (less than 16 bytes), possibly misaligned. - * Some of these are *very* common, thanks to the network stack, - * and so are handled specially. - */ -.Lmemcpy_short: -#ifndef _STANDALONE - add pc, pc, r2, lsl #2 - nop - bx lr /* 0x00 */ - b .Lmemcpy_bytewise /* 0x01 */ - b .Lmemcpy_bytewise /* 0x02 */ - b .Lmemcpy_bytewise /* 0x03 */ - b .Lmemcpy_4 /* 0x04 */ - b .Lmemcpy_bytewise /* 0x05 */ - b .Lmemcpy_6 /* 0x06 */ - b .Lmemcpy_bytewise /* 0x07 */ - b .Lmemcpy_8 /* 0x08 */ - b .Lmemcpy_bytewise /* 0x09 */ - b .Lmemcpy_bytewise /* 0x0a */ - b .Lmemcpy_bytewise /* 0x0b */ - b .Lmemcpy_c /* 0x0c */ -#endif -.Lmemcpy_bytewise: - mov r3, r0 /* We must not clobber r0 */ - ldrb ip, [r1], #0x01 -1: subs r2, r2, #0x01 - strb ip, [r3], #0x01 - ldrbne ip, [r1], #0x01 - bne 1b - bx lr - -#ifndef _STANDALONE -/****************************************************************************** - * Special case for 4 byte copies - */ -#define LMEMCPY_4_LOG2 6 /* 64 bytes */ -#define LMEMCPY_4_PAD .align LMEMCPY_4_LOG2 - LMEMCPY_4_PAD -.Lmemcpy_4: - and r2, r1, #0x03 - orr r2, r2, r0, lsl #2 - ands r2, r2, #0x0f - sub r3, pc, #0x14 - addne pc, r3, r2, lsl #LMEMCPY_4_LOG2 - -/* - * 0000: dst is 32-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - str r2, [r0] - bx lr - LMEMCPY_4_PAD - -/* - * 0001: dst is 32-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ - ldr r2, [r1, #3] /* BE:r2 = 3xxx LE:r2 = xxx3 */ - mov r3, r3, lsr #8 /* r3 = .210 */ - orr r3, r3, r2, lsl #24 /* r3 = 3210 */ - str r3, [r0] - bx lr - LMEMCPY_4_PAD - -/* - * 0010: dst is 32-bit aligned, src is 16-bit aligned - */ - ldrh r3, [r1, #0x02] - ldrh r2, [r1] - orr r3, r2, r3, lsl #16 - str r3, [r0] - bx lr - LMEMCPY_4_PAD - -/* - * 0011: dst is 32-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #-3] /* BE:r3 = xxx0 LE:r3 = 0xxx */ - ldr r2, [r1, #1] /* BE:r2 = 123x LE:r2 = x321 */ - mov r3, r3, lsr #24 /* r3 = ...0 */ - orr r3, r3, r2, lsl #8 /* r3 = 3210 */ - str r3, [r0] - bx lr - LMEMCPY_4_PAD - -/* - * 0100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - strb r2, [r0] - mov r3, r2, lsr #8 - mov r1, r2, lsr #24 - strb r1, [r0, #0x03] - strh r3, [r0, #0x01] - bx lr - LMEMCPY_4_PAD - -/* - * 0101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrb r1, [r1, #0x03] - strb r2, [r0] - strh r3, [r0, #0x01] - strb r1, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 0110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldrh r3, [r1, #0x02] /* LE:r3 = ..23 LE:r3 = ..32 */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = ...1 */ - orr r2, r2, r3, lsl #8 /* r2 = .321 */ - mov r3, r3, lsr #8 /* r3 = ...3 */ - strh r2, [r0, #0x01] - strb r3, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 0111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrb r1, [r1, #0x03] - strb r2, [r0] - strh r3, [r0, #0x01] - strb r1, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 1000: dst is 16-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - strh r2, [r0] - mov r3, r2, lsr #16 - strh r3, [r0, #0x02] - bx lr - LMEMCPY_4_PAD - -/* - * 1001: dst is 16-bit aligned, src is 8-bit aligned - */ - ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ - ldr r3, [r1, #3] /* BE:r3 = 3xxx LE:r3 = xxx3 */ - mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ - strh r1, [r0] - mov r2, r2, lsr #24 /* r2 = ...2 */ - orr r2, r2, r3, lsl #8 /* r2 = xx32 */ - strh r2, [r0, #0x02] - bx lr - LMEMCPY_4_PAD - -/* - * 1010: dst is 16-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] - ldrh r3, [r1, #0x02] - strh r2, [r0] - strh r3, [r0, #0x02] - bx lr - LMEMCPY_4_PAD - -/* - * 1011: dst is 16-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #1] /* BE:r3 = 123x LE:r3 = x321 */ - ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ - mov r1, r3, lsr #8 /* BE:r1 = .123 LE:r1 = .x32 */ - strh r1, [r0, #0x02] - mov r3, r3, lsl #8 /* r3 = 321. */ - orr r3, r3, r2, lsr #24 /* r3 = 3210 */ - strh r3, [r0] - bx lr - LMEMCPY_4_PAD - -/* - * 1100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - strb r2, [r0] - mov r3, r2, lsr #8 - mov r1, r2, lsr #24 - strh r3, [r0, #0x01] - strb r1, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 1101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrb r1, [r1, #0x03] - strb r2, [r0] - strh r3, [r0, #0x01] - strb r1, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 1110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldrh r3, [r1, #0x02] /* BE:r3 = ..23 LE:r3 = ..32 */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = ...1 */ - orr r2, r2, r3, lsl #8 /* r2 = .321 */ - strh r2, [r0, #0x01] - mov r3, r3, lsr #8 /* r3 = ...3 */ - strb r3, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - -/* - * 1111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrb r1, [r1, #0x03] - strb r2, [r0] - strh r3, [r0, #0x01] - strb r1, [r0, #0x03] - bx lr - LMEMCPY_4_PAD - - -/****************************************************************************** - * Special case for 6 byte copies - */ -#define LMEMCPY_6_LOG2 6 /* 64 bytes */ -#define LMEMCPY_6_PAD .align LMEMCPY_6_LOG2 - LMEMCPY_6_PAD -.Lmemcpy_6: - and r2, r1, #0x03 - orr r2, r2, r0, lsl #2 - ands r2, r2, #0x0f - sub r3, pc, #0x14 - addne pc, r3, r2, lsl #LMEMCPY_6_LOG2 - -/* - * 0000: dst is 32-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - ldrh r3, [r1, #0x04] - str r2, [r0] - strh r3, [r0, #0x04] - bx lr - LMEMCPY_6_PAD - -/* - * 0001: dst is 32-bit aligned, src is 8-bit aligned - */ - ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ - ldr r3, [r1, #0x03] /* BE:r3 = 345x LE:r3 = x543 */ - mov r2, r2, lsr #8 /* r2 = .210 */ - orr r2, r2, r3, lsl #24 /* r2 = 3210 */ - mov r3, r3, lsr #8 /* BE:r3 = .345 LE:r3 = .x54 */ - str r2, [r0] - strh r3, [r0, #0x04] - bx lr - LMEMCPY_6_PAD - -/* - * 0010: dst is 32-bit aligned, src is 16-bit aligned - */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - mov r1, r3, lsr #16 /* r1 = ..54 */ - orr r2, r2, r3, lsl #16 /* r2 = 3210 */ - str r2, [r0] - strh r1, [r0, #0x04] - bx lr - LMEMCPY_6_PAD - -/* - * 0011: dst is 32-bit aligned, src is 8-bit aligned - */ - ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ - ldr r3, [r1, #1] /* BE:r3 = 1234 LE:r3 = 4321 */ - ldr r1, [r1, #5] /* BE:r1 = 5xxx LE:r3 = xxx5 */ - mov r2, r2, lsr #24 /* r2 = ...0 */ - orr r2, r2, r3, lsl #8 /* r2 = 3210 */ - mov r1, r1, lsl #8 /* r1 = xx5. */ - orr r1, r1, r3, lsr #24 /* r1 = xx54 */ - str r2, [r0] - strh r1, [r0, #0x04] - bx lr - LMEMCPY_6_PAD - -/* - * 0100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ - ldrh r2, [r1, #0x04] /* BE:r2 = ..45 LE:r2 = ..54 */ - mov r1, r3, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */ - strh r1, [r0, #0x01] - strb r3, [r0] - mov r3, r3, lsr #24 /* r3 = ...3 */ - orr r3, r3, r2, lsl #8 /* r3 = .543 */ - mov r2, r2, lsr #8 /* r2 = ...5 */ - strh r3, [r0, #0x03] - strb r2, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 0101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrh ip, [r1, #0x03] - ldrb r1, [r1, #0x05] - strb r2, [r0] - strh r3, [r0, #0x01] - strh ip, [r0, #0x03] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 0110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ - strb r2, [r0] - mov r3, r1, lsr #24 - strb r3, [r0, #0x05] - mov r3, r1, lsr #8 /* r3 = .543 */ - strh r3, [r0, #0x03] - mov r3, r2, lsr #8 /* r3 = ...1 */ - orr r3, r3, r1, lsl #8 /* r3 = 4321 */ - strh r3, [r0, #0x01] - bx lr - LMEMCPY_6_PAD - -/* - * 0111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrh ip, [r1, #0x03] - ldrb r1, [r1, #0x05] - strb r2, [r0] - strh r3, [r0, #0x01] - strh ip, [r0, #0x03] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 1000: dst is 16-bit aligned, src is 32-bit aligned - */ - ldrh r2, [r1, #0x04] /* r2 = ..54 */ - ldr r3, [r1] /* r3 = 3210 */ - mov r2, r2, lsl #16 /* r2 = 54.. */ - orr r2, r2, r3, lsr #16 /* r2 = 5432 */ - strh r3, [r0] - str r2, [r0, #0x02] - bx lr - LMEMCPY_6_PAD - -/* - * 1001: dst is 16-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ - ldr r2, [r1, #3] /* BE:r2 = 345x LE:r2 = x543 */ - mov r1, r3, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ - mov r2, r2, lsl #8 /* r2 = 543. */ - orr r2, r2, r3, lsr #24 /* r2 = 5432 */ - strh r1, [r0] - str r2, [r0, #0x02] - bx lr - LMEMCPY_6_PAD - -/* - * 1010: dst is 16-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] - ldr r3, [r1, #0x02] - strh r2, [r0] - str r3, [r0, #0x02] - bx lr - LMEMCPY_6_PAD - -/* - * 1011: dst is 16-bit aligned, src is 8-bit aligned - */ - ldrb r3, [r1] /* r3 = ...0 */ - ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ - ldrb r1, [r1, #0x05] /* r1 = ...5 */ - orr r3, r3, r2, lsl #8 /* r3 = 3210 */ - mov r1, r1, lsl #24 /* r1 = 5... */ - orr r1, r1, r2, lsr #8 /* r1 = 5432 */ - strh r3, [r0] - str r1, [r0, #0x02] - bx lr - LMEMCPY_6_PAD - -/* - * 1100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - ldrh r1, [r1, #0x04] /* BE:r1 = ..45 LE:r1 = ..54 */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = .321 */ - orr r2, r2, r1, lsl #24 /* r2 = 4321 */ - mov r1, r1, lsr #8 /* r1 = ...5 */ - str r2, [r0, #0x01] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 1101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldrh ip, [r1, #0x03] - ldrb r1, [r1, #0x05] - strb r2, [r0] - strh r3, [r0, #0x01] - strh ip, [r0, #0x03] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 1110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = ...1 */ - orr r2, r2, r1, lsl #8 /* r2 = 4321 */ - mov r1, r1, lsr #24 /* r1 = ...5 */ - str r2, [r0, #0x01] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - -/* - * 1111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldr r3, [r1, #0x01] - ldrb r1, [r1, #0x05] - strb r2, [r0] - str r3, [r0, #0x01] - strb r1, [r0, #0x05] - bx lr - LMEMCPY_6_PAD - - -/****************************************************************************** - * Special case for 8 byte copies - */ -#define LMEMCPY_8_LOG2 6 /* 64 bytes */ -#define LMEMCPY_8_PAD .align LMEMCPY_8_LOG2 - LMEMCPY_8_PAD -.Lmemcpy_8: - and r2, r1, #0x03 - orr r2, r2, r0, lsl #2 - ands r2, r2, #0x0f - sub r3, pc, #0x14 - addne pc, r3, r2, lsl #LMEMCPY_8_LOG2 - -/* - * 0000: dst is 32-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - ldr r3, [r1, #0x04] - str r2, [r0] - str r3, [r0, #0x04] - bx lr - LMEMCPY_8_PAD - -/* - * 0001: dst is 32-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ - ldr r2, [r1, #0x03] /* BE:r2 = 3456 LE:r2 = 6543 */ - ldrb r1, [r1, #0x07] /* r1 = ...7 */ - mov r3, r3, lsr #8 /* r3 = .210 */ - orr r3, r3, r2, lsl #24 /* r3 = 3210 */ - mov r1, r1, lsl #24 /* r1 = 7... */ - orr r2, r1, r2, lsr #8 /* r2 = 7654 */ - str r3, [r0] - str r2, [r0, #0x04] - bx lr - LMEMCPY_8_PAD - -/* - * 0010: dst is 32-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ - orr r2, r2, r3, lsl #16 /* r2 = 3210 */ - mov r3, r3, lsr #16 /* r3 = ..54 */ - orr r3, r3, r1, lsl #16 /* r3 = 7654 */ - str r2, [r0] - str r3, [r0, #0x04] - bx lr - LMEMCPY_8_PAD - -/* - * 0011: dst is 32-bit aligned, src is 8-bit aligned - */ - ldrb r3, [r1] /* r3 = ...0 */ - ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ - ldr r1, [r1, #0x05] /* BE:r1 = 567x LE:r1 = x765 */ - orr r3, r3, r2, lsl #8 /* r3 = 3210 */ - mov r2, r2, lsr #24 /* r2 = ...4 */ - orr r2, r2, r1, lsl #8 /* r2 = 7654 */ - str r3, [r0] - str r2, [r0, #0x04] - bx lr - LMEMCPY_8_PAD - -/* - * 0100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ - ldr r2, [r1, #0x04] /* BE:r2 = 4567 LE:r2 = 7654 */ - strb r3, [r0] - mov r1, r2, lsr #24 /* r1 = ...7 */ - strb r1, [r0, #0x07] - mov r1, r3, lsr #8 /* r1 = .321 */ - mov r3, r3, lsr #24 /* r3 = ...3 */ - orr r3, r3, r2, lsl #8 /* r3 = 6543 */ - strh r1, [r0, #0x01] - str r3, [r0, #0x03] - bx lr - LMEMCPY_8_PAD - -/* - * 0101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldr ip, [r1, #0x03] - ldrb r1, [r1, #0x07] - strb r2, [r0] - strh r3, [r0, #0x01] - str ip, [r0, #0x03] - strb r1, [r0, #0x07] - bx lr - LMEMCPY_8_PAD - -/* - * 0110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ - strb r2, [r0] /* 0 */ - mov ip, r1, lsr #8 /* ip = ...7 */ - strb ip, [r0, #0x07] /* 7 */ - mov ip, r2, lsr #8 /* ip = ...1 */ - orr ip, ip, r3, lsl #8 /* ip = 4321 */ - mov r3, r3, lsr #8 /* r3 = .543 */ - orr r3, r3, r1, lsl #24 /* r3 = 6543 */ - strh ip, [r0, #0x01] - str r3, [r0, #0x03] - bx lr - LMEMCPY_8_PAD - -/* - * 0111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r3, [r1] /* r3 = ...0 */ - ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */ - ldrh r2, [r1, #0x05] /* BE:r2 = ..56 LE:r2 = ..65 */ - ldrb r1, [r1, #0x07] /* r1 = ...7 */ - strb r3, [r0] - mov r3, ip, lsr #16 /* BE:r3 = ..12 LE:r3 = ..43 */ - strh ip, [r0, #0x01] - orr r2, r3, r2, lsl #16 /* r2 = 6543 */ - str r2, [r0, #0x03] - strb r1, [r0, #0x07] - bx lr - LMEMCPY_8_PAD - -/* - * 1000: dst is 16-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ - mov r1, r2, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */ - strh r2, [r0] - orr r2, r1, r3, lsl #16 /* r2 = 5432 */ - mov r3, r3, lsr #16 /* r3 = ..76 */ - str r2, [r0, #0x02] - strh r3, [r0, #0x06] - bx lr - LMEMCPY_8_PAD - -/* - * 1001: dst is 16-bit aligned, src is 8-bit aligned - */ - ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ - ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ - ldrb ip, [r1, #0x07] /* ip = ...7 */ - mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ - strh r1, [r0] - mov r1, r2, lsr #24 /* r1 = ...2 */ - orr r1, r1, r3, lsl #8 /* r1 = 5432 */ - mov r3, r3, lsr #24 /* r3 = ...6 */ - orr r3, r3, ip, lsl #8 /* r3 = ..76 */ - str r1, [r0, #0x02] - strh r3, [r0, #0x06] - bx lr - LMEMCPY_8_PAD - -/* - * 1010: dst is 16-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] - ldr ip, [r1, #0x02] - ldrh r3, [r1, #0x06] - strh r2, [r0] - str ip, [r0, #0x02] - strh r3, [r0, #0x06] - bx lr - LMEMCPY_8_PAD - -/* - * 1011: dst is 16-bit aligned, src is 8-bit aligned - */ - ldr r3, [r1, #0x05] /* BE:r3 = 567x LE:r3 = x765 */ - ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ - ldrb ip, [r1] /* ip = ...0 */ - mov r1, r3, lsr #8 /* BE:r1 = .567 LE:r1 = .x76 */ - strh r1, [r0, #0x06] - mov r3, r3, lsl #24 /* r3 = 5... */ - orr r3, r3, r2, lsr #8 /* r3 = 5432 */ - orr r2, ip, r2, lsl #8 /* r2 = 3210 */ - str r3, [r0, #0x02] - strh r2, [r0] - bx lr - LMEMCPY_8_PAD - -/* - * 1100: dst is 8-bit aligned, src is 32-bit aligned - */ - ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - mov r1, r3, lsr #8 /* BE:r1 = .456 LE:r1 = .765 */ - strh r1, [r0, #0x05] - strb r2, [r0] - mov r1, r3, lsr #24 /* r1 = ...7 */ - strb r1, [r0, #0x07] - mov r2, r2, lsr #8 /* r2 = .321 */ - orr r2, r2, r3, lsl #24 /* r2 = 4321 */ - str r2, [r0, #0x01] - bx lr - LMEMCPY_8_PAD - -/* - * 1101: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r3, [r1] /* r3 = ...0 */ - ldrh r2, [r1, #0x01] /* BE:r2 = ..12 LE:r2 = ..21 */ - ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */ - ldrb r1, [r1, #0x07] /* r1 = ...7 */ - strb r3, [r0] - mov r3, ip, lsr #16 /* BE:r3 = ..34 LE:r3 = ..65 */ - strh r3, [r0, #0x05] - orr r2, r2, ip, lsl #16 /* r2 = 4321 */ - str r2, [r0, #0x01] - strb r1, [r0, #0x07] - bx lr - LMEMCPY_8_PAD - -/* - * 1110: dst is 8-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ - strb r2, [r0] - mov ip, r2, lsr #8 /* ip = ...1 */ - orr ip, ip, r3, lsl #8 /* ip = 4321 */ - mov r2, r1, lsr #8 /* r2 = ...7 */ - strb r2, [r0, #0x07] - mov r1, r1, lsl #8 /* r1 = .76. */ - orr r1, r1, r3, lsr #24 /* r1 = .765 */ - str ip, [r0, #0x01] - strh r1, [r0, #0x05] - bx lr - LMEMCPY_8_PAD - -/* - * 1111: dst is 8-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] - ldr ip, [r1, #0x01] - ldrh r3, [r1, #0x05] - ldrb r1, [r1, #0x07] - strb r2, [r0] - str ip, [r0, #0x01] - strh r3, [r0, #0x05] - strb r1, [r0, #0x07] - bx lr - LMEMCPY_8_PAD - -/****************************************************************************** - * Special case for 12 byte copies - */ -#define LMEMCPY_C_LOG2 7 /* 128 bytes */ -#define LMEMCPY_C_PAD .align LMEMCPY_C_LOG2 - LMEMCPY_C_PAD -.Lmemcpy_c: - and r2, r1, #0x03 - orr r2, r2, r0, lsl #2 - ands r2, r2, #0x0f - sub r3, pc, #0x14 - addne pc, r3, r2, lsl #LMEMCPY_C_LOG2 - -/* - * 0000: dst is 32-bit aligned, src is 32-bit aligned - */ - ldr r2, [r1] - ldr r3, [r1, #0x04] - ldr r1, [r1, #0x08] - str r2, [r0] - str r3, [r0, #0x04] - str r1, [r0, #0x08] - bx lr - LMEMCPY_C_PAD - -/* - * 0001: dst is 32-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1, #0xb] /* r2 = ...B */ - ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */ - ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ - ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */ - mov r2, r2, lsl #24 /* r2 = B... */ - orr r2, r2, ip, lsr #8 /* r2 = BA98 */ - str r2, [r0, #0x08] - mov r2, ip, lsl #24 /* r2 = 7... */ - orr r2, r2, r3, lsr #8 /* r2 = 7654 */ - mov r1, r1, lsr #8 /* r1 = .210 */ - orr r1, r1, r3, lsl #24 /* r1 = 3210 */ - str r2, [r0, #0x04] - str r1, [r0] - bx lr - LMEMCPY_C_PAD - -/* - * 0010: dst is 32-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */ - ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */ - orr r2, r2, r3, lsl #16 /* r2 = 3210 */ - str r2, [r0] - mov r3, r3, lsr #16 /* r3 = ..54 */ - orr r3, r3, ip, lsl #16 /* r3 = 7654 */ - mov r1, r1, lsl #16 /* r1 = BA.. */ - orr r1, r1, ip, lsr #16 /* r1 = BA98 */ - str r3, [r0, #0x04] - str r1, [r0, #0x08] - bx lr - LMEMCPY_C_PAD - -/* - * 0011: dst is 32-bit aligned, src is 8-bit aligned - */ - ldrb r2, [r1] /* r2 = ...0 */ - ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */ - ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */ - ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */ - orr r2, r2, r3, lsl #8 /* r2 = 3210 */ - str r2, [r0] - mov r3, r3, lsr #24 /* r3 = ...4 */ - orr r3, r3, ip, lsl #8 /* r3 = 7654 */ - mov r1, r1, lsl #8 /* r1 = BA9. */ - orr r1, r1, ip, lsr #24 /* r1 = BA98 */ - str r3, [r0, #0x04] - str r1, [r0, #0x08] - bx lr - LMEMCPY_C_PAD - -/* - * 0100: dst is 8-bit aligned (byte 1), src is 32-bit aligned - */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ - ldr ip, [r1, #0x08] /* BE:ip = 89AB LE:ip = BA98 */ - mov r1, r2, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */ - strh r1, [r0, #0x01] - strb r2, [r0] - mov r1, r2, lsr #24 /* r1 = ...3 */ - orr r2, r1, r3, lsl #8 /* r1 = 6543 */ - mov r1, r3, lsr #24 /* r1 = ...7 */ - orr r1, r1, ip, lsl #8 /* r1 = A987 */ - mov ip, ip, lsr #24 /* ip = ...B */ - str r2, [r0, #0x03] - str r1, [r0, #0x07] - strb ip, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 0101: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 1) - */ - ldrb r2, [r1] - ldrh r3, [r1, #0x01] - ldr ip, [r1, #0x03] - strb r2, [r0] - ldr r2, [r1, #0x07] - ldrb r1, [r1, #0x0b] - strh r3, [r0, #0x01] - str ip, [r0, #0x03] - str r2, [r0, #0x07] - strb r1, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 0110: dst is 8-bit aligned (byte 1), src is 16-bit aligned - */ - ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ - ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ - ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */ - ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = ...1 */ - orr r2, r2, r3, lsl #8 /* r2 = 4321 */ - strh r2, [r0, #0x01] - mov r2, r3, lsr #8 /* r2 = .543 */ - orr r3, r2, ip, lsl #24 /* r3 = 6543 */ - mov r2, ip, lsr #8 /* r2 = .987 */ - orr r2, r2, r1, lsl #24 /* r2 = A987 */ - mov r1, r1, lsr #8 /* r1 = ...B */ - str r3, [r0, #0x03] - str r2, [r0, #0x07] - strb r1, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 0111: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 3) - */ - ldrb r2, [r1] - ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */ - ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */ - ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */ - strb r2, [r0] - strh r3, [r0, #0x01] - mov r3, r3, lsr #16 /* r3 = ..43 */ - orr r3, r3, ip, lsl #16 /* r3 = 6543 */ - mov ip, ip, lsr #16 /* ip = ..87 */ - orr ip, ip, r1, lsl #16 /* ip = A987 */ - mov r1, r1, lsr #16 /* r1 = ..xB */ - str r3, [r0, #0x03] - str ip, [r0, #0x07] - strb r1, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 1000: dst is 16-bit aligned, src is 32-bit aligned - */ - ldr ip, [r1] /* BE:ip = 0123 LE:ip = 3210 */ - ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ - ldr r2, [r1, #0x08] /* BE:r2 = 89AB LE:r2 = BA98 */ - mov r1, ip, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */ - strh ip, [r0] - orr r1, r1, r3, lsl #16 /* r1 = 5432 */ - mov r3, r3, lsr #16 /* r3 = ..76 */ - orr r3, r3, r2, lsl #16 /* r3 = 9876 */ - mov r2, r2, lsr #16 /* r2 = ..BA */ - str r1, [r0, #0x02] - str r3, [r0, #0x06] - strh r2, [r0, #0x0a] - bx lr - LMEMCPY_C_PAD - -/* - * 1001: dst is 16-bit aligned, src is 8-bit aligned (byte 1) - */ - ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ - ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */ - mov ip, r2, lsr #8 /* BE:ip = .x01 LE:ip = .210 */ - strh ip, [r0] - ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */ - ldrb r1, [r1, #0x0b] /* r1 = ...B */ - mov r2, r2, lsr #24 /* r2 = ...2 */ - orr r2, r2, r3, lsl #8 /* r2 = 5432 */ - mov r3, r3, lsr #24 /* r3 = ...6 */ - orr r3, r3, ip, lsl #8 /* r3 = 9876 */ - mov r1, r1, lsl #8 /* r1 = ..B. */ - orr r1, r1, ip, lsr #24 /* r1 = ..BA */ - str r2, [r0, #0x02] - str r3, [r0, #0x06] - strh r1, [r0, #0x0a] - bx lr - LMEMCPY_C_PAD - -/* - * 1010: dst is 16-bit aligned, src is 16-bit aligned - */ - ldrh r2, [r1] - ldr r3, [r1, #0x02] - ldr ip, [r1, #0x06] - ldrh r1, [r1, #0x0a] - strh r2, [r0] - str r3, [r0, #0x02] - str ip, [r0, #0x06] - strh r1, [r0, #0x0a] - bx lr - LMEMCPY_C_PAD - -/* - * 1011: dst is 16-bit aligned, src is 8-bit aligned (byte 3) - */ - ldr r2, [r1, #0x09] /* BE:r2 = 9ABx LE:r2 = xBA9 */ - ldr r3, [r1, #0x05] /* BE:r3 = 5678 LE:r3 = 8765 */ - mov ip, r2, lsr #8 /* BE:ip = .9AB LE:ip = .xBA */ - strh ip, [r0, #0x0a] - ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */ - ldrb r1, [r1] /* r1 = ...0 */ - mov r2, r2, lsl #24 /* r2 = 9... */ - orr r2, r2, r3, lsr #8 /* r2 = 9876 */ - mov r3, r3, lsl #24 /* r3 = 5... */ - orr r3, r3, ip, lsr #8 /* r3 = 5432 */ - orr r1, r1, ip, lsl #8 /* r1 = 3210 */ - str r2, [r0, #0x06] - str r3, [r0, #0x02] - strh r1, [r0] - bx lr - LMEMCPY_C_PAD - -/* - * 1100: dst is 8-bit aligned (byte 3), src is 32-bit aligned - */ - ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ - ldr ip, [r1, #0x04] /* BE:ip = 4567 LE:ip = 7654 */ - ldr r1, [r1, #0x08] /* BE:r1 = 89AB LE:r1 = BA98 */ - strb r2, [r0] - mov r3, r2, lsr #8 /* r3 = .321 */ - orr r3, r3, ip, lsl #24 /* r3 = 4321 */ - str r3, [r0, #0x01] - mov r3, ip, lsr #8 /* r3 = .765 */ - orr r3, r3, r1, lsl #24 /* r3 = 8765 */ - str r3, [r0, #0x05] - mov r1, r1, lsr #8 /* r1 = .BA9 */ - strh r1, [r0, #0x09] - mov r1, r1, lsr #16 /* r1 = ...B */ - strb r1, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 1101: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 1) - */ - ldrb r2, [r1, #0x0b] /* r2 = ...B */ - ldr r3, [r1, #0x07] /* BE:r3 = 789A LE:r3 = A987 */ - ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */ - ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */ - strb r2, [r0, #0x0b] - mov r2, r3, lsr #16 /* r2 = ..A9 */ - strh r2, [r0, #0x09] - mov r3, r3, lsl #16 /* r3 = 87.. */ - orr r3, r3, ip, lsr #16 /* r3 = 8765 */ - mov ip, ip, lsl #16 /* ip = 43.. */ - orr ip, ip, r1, lsr #16 /* ip = 4321 */ - mov r1, r1, lsr #8 /* r1 = .210 */ - str r3, [r0, #0x05] - str ip, [r0, #0x01] - strb r1, [r0] - bx lr - LMEMCPY_C_PAD - -/* - * 1110: dst is 8-bit aligned (byte 3), src is 16-bit aligned - */ - ldrh r2, [r1] /* r2 = ..10 */ - ldr r3, [r1, #0x02] /* r3 = 5432 */ - ldr ip, [r1, #0x06] /* ip = 9876 */ - ldrh r1, [r1, #0x0a] /* r1 = ..BA */ - strb r2, [r0] - mov r2, r2, lsr #8 /* r2 = ...1 */ - orr r2, r2, r3, lsl #8 /* r2 = 4321 */ - mov r3, r3, lsr #24 /* r3 = ...5 */ - orr r3, r3, ip, lsl #8 /* r3 = 8765 */ - mov ip, ip, lsr #24 /* ip = ...9 */ - orr ip, ip, r1, lsl #8 /* ip = .BA9 */ - mov r1, r1, lsr #8 /* r1 = ...B */ - str r2, [r0, #0x01] - str r3, [r0, #0x05] - strh ip, [r0, #0x09] - strb r1, [r0, #0x0b] - bx lr - LMEMCPY_C_PAD - -/* - * 1111: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 3) - */ - ldrb r2, [r1] - ldr r3, [r1, #0x01] - ldr ip, [r1, #0x05] - strb r2, [r0] - ldrh r2, [r1, #0x09] - ldrb r1, [r1, #0x0b] - str r3, [r0, #0x01] - str ip, [r0, #0x05] - strh r2, [r0, #0x09] - strb r1, [r0, #0x0b] - bx lr -#endif /* !_STANDALONE */ -END(memcpy) - - .section .note.GNU-stack,"",%progbits