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Remove obsolete code gated on _ARM_ARCH_*

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This is all code only run on ARMv4 and ARMv5. Support for these have
been dropped from FreeBSD.

Differential Revision:	https://reviews.freebsd.org/D28314
This commit is contained in:
Andrew Turner 2021-01-28 10:41:45 +00:00
parent 4d2ff2330f
commit 4e76e4c301
5 changed files with 1 additions and 101 deletions
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28
lib/libc/arm/string/ffs.S
View File

@ -48,38 +48,10 @@ ENTRY(ffs)
/* Standard trick to isolate bottom bit in r0 or 0 if r0 = 0 on entry */
rsb r1, r0, #0
ands r0, r0, r1
#ifndef _ARM_ARCH_5
/*
* now r0 has at most one set bit, call this X
* if X = 0, all further instructions are skipped
*/
adrne r2, .L_ffs_table
orrne r0, r0, r0, lsl #4 /* r0 = X * 0x11 */
orrne r0, r0, r0, lsl #6 /* r0 = X * 0x451 */
rsbne r0, r0, r0, lsl #16 /* r0 = X * 0x0450fbaf */
/* now lookup in table indexed on top 6 bits of r0 */
ldrbne r0, [ r2, r0, lsr #26 ]
RET
.text;
.type .L_ffs_table, _ASM_TYPE_OBJECT;
.L_ffs_table:
/* 0 1 2 3 4 5 6 7 */
.byte 0, 1, 2, 13, 3, 7, 0, 14 /* 0- 7 */
.byte 4, 0, 8, 0, 0, 0, 0, 15 /* 8-15 */
.byte 11, 5, 0, 0, 9, 0, 0, 26 /* 16-23 */
.byte 0, 0, 0, 0, 0, 22, 28, 16 /* 24-31 */
.byte 32, 12, 6, 0, 0, 0, 0, 0 /* 32-39 */
.byte 10, 0, 0, 25, 0, 0, 21, 27 /* 40-47 */
.byte 31, 0, 0, 0, 0, 24, 0, 20 /* 48-55 */
.byte 30, 0, 23, 19, 29, 18, 17, 0 /* 56-63 */
#else
itt ne
clzne r0, r0
rsbne r0, r0, #32
RET
#endif
END(ffs)
.section .note.GNU-stack,"",%progbits

41
lib/libc/arm/string/memset.S
View File

@ -105,20 +105,14 @@ ENTRY(memset)
#ifndef _BZERO
orr r3, r3, r3, lsl #8 /* Extend value to 16-bits */
#endif
#ifdef _ARM_ARCH_5E
tst ip, #0x04 /* Quad-align for armv5e */
#else
cmp r1, #0x10
#endif
#ifndef _BZERO
orr r3, r3, r3, lsl #16 /* Extend value to 32-bits */
#endif
#ifdef _ARM_ARCH_5E
itt ne
subne r1, r1, #0x04 /* Quad-align if necessary */
strne r3, [ip], #0x04
cmp r1, #0x10
#endif
blt .Lmemset_loop4 /* If less than 16 then use words */
mov r2, r3 /* Duplicate data */
cmp r1, #0x80 /* If < 128 then skip the big loop */
@ -127,7 +121,6 @@ ENTRY(memset)
/* Do 128 bytes at a time */
.Lmemset_loop128:
subs r1, r1, #0x80
#ifdef _ARM_ARCH_5E
itttt ge
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
@ -148,24 +141,6 @@ ENTRY(memset)
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
#else
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
#endif
bgt .Lmemset_loop128
it eq
RETeq /* Zero length so just exit */
@ -176,17 +151,10 @@ ENTRY(memset)
.Lmemset_loop32:
subs r1, r1, #0x20
itttt ge
#ifdef _ARM_ARCH_5E
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
#else
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
#endif
bgt .Lmemset_loop32
it eq
RETeq /* Zero length so just exit */
@ -195,13 +163,8 @@ ENTRY(memset)
/* Deal with 16 bytes or more */
itt ge
#ifdef _ARM_ARCH_5E
strdge r2, [ip], #0x08
strdge r2, [ip], #0x08
#else
stmiage ip!, {r2-r3}
stmiage ip!, {r2-r3}
#endif
it eq
RETeq /* Zero length so just exit */
@ -217,15 +180,11 @@ ENTRY(memset)
it eq
RETeq /* Zero length so just exit */
#ifdef _ARM_ARCH_5E
/* Compensate for 64-bit alignment check */
adds r1, r1, #0x04
it eq
RETeq
cmp r1, #2
#else
cmp r1, #-2
#endif
strb r3, [ip], #0x01 /* Set 1 byte */
it ge

2
stand/arm/uboot/start.S
View File

@ -39,12 +39,10 @@
.globl _start
_start:
#ifdef _ARM_ARCH_6
mrc p15, 0, ip, c1, c0, 0
orr ip, ip, #(CPU_CONTROL_UNAL_ENABLE)
orr ip, ip, #(CPU_CONTROL_AFLT_ENABLE)
mcr p15, 0, ip, c1, c0, 0
#endif
/* Save the arguments and return register before calling self_reloc */
push {r0, r1, r9, lr}

2
sys/arm/arm/machdep.c
View File

@ -107,7 +107,7 @@ __FBSDID("$FreeBSD$");
#endif
#ifndef _ARM_ARCH_6
#if __ARM_ARCH < 6
#error FreeBSD requires ARMv6 or later
#endif

29
sys/libkern/arm/ffs.S
View File

@ -51,37 +51,8 @@ ENTRY(ffs)
/* Standard trick to isolate bottom bit in r0 or 0 if r0 = 0 on entry */
rsb r1, r0, #0
ands r0, r0, r1
#ifndef _ARM_ARCH_5
/*
* now r0 has at most one set bit, call this X
* if X = 0, all further instructions are skipped
*/
adrne r2, .L_ffs_table
orrne r0, r0, r0, lsl #4 /* r0 = X * 0x11 */
orrne r0, r0, r0, lsl #6 /* r0 = X * 0x451 */
rsbne r0, r0, r0, lsl #16 /* r0 = X * 0x0450fbaf */
/* now lookup in table indexed on top 6 bits of r0 */
ldrbne r0, [ r2, r0, lsr #26 ]
RET
.text;
.type .L_ffs_table, _ASM_TYPE_OBJECT;
.L_ffs_table:
/* 0 1 2 3 4 5 6 7 */
.byte 0, 1, 2, 13, 3, 7, 0, 14 /* 0- 7 */
.byte 4, 0, 8, 0, 0, 0, 0, 15 /* 8-15 */
.byte 11, 5, 0, 0, 9, 0, 0, 26 /* 16-23 */
.byte 0, 0, 0, 0, 0, 22, 28, 16 /* 24-31 */
.byte 32, 12, 6, 0, 0, 0, 0, 0 /* 32-39 */
.byte 10, 0, 0, 25, 0, 0, 21, 27 /* 40-47 */
.byte 31, 0, 0, 0, 0, 24, 0, 20 /* 48-55 */
.byte 30, 0, 23, 19, 29, 18, 17, 0 /* 56-63 */
#else
clzne r0, r0
rsbne r0, r0, #32
RET
#endif
END(ffs)