Switch to the ARM unified assembly language as the clang integrated as only
supports it. Binutils supports it when the ".syntax unified" directive is set. Sponsored by: ABT Systems Ltd
This commit is contained in:
Andrew Turner
parent
575bd6d8aa
commit
a215cdfdb0
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=275256
@ -32,6 +32,8 @@
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__FBSDID("$FreeBSD$");
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.syntax unified
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/*
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* ffs - find first set bit, this algorithm isolates the first set
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* bit, then multiplies the number by 0x0450fbaf which leaves the top
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@ -60,7 +62,7 @@ ENTRY(ffs)
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rsbne r0, r0, r0, lsl #16 /* r0 = X * 0x0450fbaf */
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/* now lookup in table indexed on top 6 bits of r0 */
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ldrneb r0, [ r2, r0, lsr #26 ]
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ldrbne r0, [ r2, r0, lsr #26 ]
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RET
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.text;
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@ -66,6 +66,8 @@
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__FBSDID("$FreeBSD$");
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.syntax unified
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ENTRY(memcmp)
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mov ip, r0
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#if defined(_KERNEL) && !defined(_STANDALONE)
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@ -76,7 +78,7 @@ ENTRY(memcmp)
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/* Are both addresses aligned the same way? */
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cmp r2, #0x00
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eornes r3, ip, r1
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eorsne r3, ip, r1
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RETeq /* len == 0, or same addresses! */
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tst r3, #0x03
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subne r2, r2, #0x01
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@ -31,6 +31,9 @@
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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.syntax unified
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/*
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* This is one fun bit of code ...
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* Some easy listening music is suggested while trying to understand this
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@ -91,8 +94,8 @@ ENTRY(memcpy)
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bge .Lmemcpy_loop32
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cmn r2, #0x10
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ldmgeia r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmgeia r0!, {r3, r4, r12, lr}
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ldmiage r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmiage r0!, {r3, r4, r12, lr}
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subge r2, r2, #0x10
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ldmia sp!, {r4} /* return r4 */
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@ -101,9 +104,9 @@ ENTRY(memcpy)
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/* blat 12 bytes at a time */
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.Lmemcpy_loop12:
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ldmgeia r1!, {r3, r12, lr}
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stmgeia r0!, {r3, r12, lr}
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subges r2, r2, #0x0c
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ldmiage r1!, {r3, r12, lr}
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stmiage r0!, {r3, r12, lr}
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subsge r2, r2, #0x0c
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bge .Lmemcpy_loop12
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.Lmemcpy_l12:
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@ -113,26 +116,26 @@ ENTRY(memcpy)
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subs r2, r2, #4
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ldrlt r3, [r1], #4
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strlt r3, [r0], #4
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ldmgeia r1!, {r3, r12}
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stmgeia r0!, {r3, r12}
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ldmiage r1!, {r3, r12}
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stmiage r0!, {r3, r12}
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subge r2, r2, #4
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.Lmemcpy_l4:
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/* less than 4 bytes to go */
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adds r2, r2, #4
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#ifdef __APCS_26_
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ldmeqia sp!, {r0, pc}^ /* done */
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ldmiaeq sp!, {r0, pc}^ /* done */
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#else
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ldmeqia sp!, {r0, pc} /* done */
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ldmiaeq sp!, {r0, pc} /* done */
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#endif
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/* copy the crud byte at a time */
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cmp r2, #2
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ldrb r3, [r1], #1
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strb r3, [r0], #1
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ldrgeb r3, [r1], #1
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strgeb r3, [r0], #1
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ldrgtb r3, [r1], #1
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strgtb r3, [r0], #1
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ldrbge r3, [r1], #1
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strbge r3, [r0], #1
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ldrbgt r3, [r1], #1
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strbgt r3, [r0], #1
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ldmia sp!, {r0, pc}
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/* erg - unaligned destination */
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@ -143,10 +146,10 @@ ENTRY(memcpy)
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/* align destination with byte copies */
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ldrb r3, [r1], #1
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strb r3, [r0], #1
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ldrgeb r3, [r1], #1
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strgeb r3, [r0], #1
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ldrgtb r3, [r1], #1
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strgtb r3, [r0], #1
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ldrbge r3, [r1], #1
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strbge r3, [r0], #1
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ldrbgt r3, [r1], #1
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strbgt r3, [r0], #1
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subs r2, r2, r12
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blt .Lmemcpy_l4 /* less the 4 bytes */
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@ -38,6 +38,8 @@
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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.syntax unified
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/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */
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ENTRY(memcpy)
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pld [r1]
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@ -52,12 +54,12 @@ ENTRY(memcpy)
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ldrb ip, [r1], #0x01
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sub r2, r2, #0x01
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strb ip, [r3], #0x01
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ldrleb ip, [r1], #0x01
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ldrble ip, [r1], #0x01
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suble r2, r2, #0x01
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strleb ip, [r3], #0x01
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ldrltb ip, [r1], #0x01
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strble ip, [r3], #0x01
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ldrblt ip, [r1], #0x01
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sublt r2, r2, #0x01
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strltb ip, [r3], #0x01
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strblt ip, [r3], #0x01
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/* Destination buffer is now word aligned */
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.Lmemcpy_wordaligned:
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@ -134,7 +136,7 @@ ENTRY(memcpy)
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.Lmemcpy_w_lessthan128:
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adds r2, r2, #0x80 /* Adjust for extra sub */
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ldmeqfd sp!, {r4-r9}
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ldmfdeq sp!, {r4-r9}
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bxeq lr /* Return now if done */
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subs r2, r2, #0x20
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blt .Lmemcpy_w_lessthan32
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@ -159,7 +161,7 @@ ENTRY(memcpy)
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.Lmemcpy_w_lessthan32:
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adds r2, r2, #0x20 /* Adjust for extra sub */
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ldmeqfd sp!, {r4-r9}
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ldmfdeq sp!, {r4-r9}
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bxeq lr /* Return now if done */
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and r4, r2, #0x18
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@ -195,11 +197,11 @@ ENTRY(memcpy)
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addlt r2, r2, #0x04
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ldrb ip, [r1], #0x01
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cmp r2, #0x02
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ldrgeb r2, [r1], #0x01
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ldrbge r2, [r1], #0x01
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strb ip, [r3], #0x01
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ldrgtb ip, [r1]
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strgeb r2, [r3], #0x01
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strgtb ip, [r3]
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ldrbgt ip, [r1]
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strbge r2, [r3], #0x01
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strbgt ip, [r3]
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bx lr
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@ -253,7 +255,7 @@ ENTRY(memcpy)
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bge .Lmemcpy_bad1_loop16
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adds r2, r2, #0x10
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ldmeqfd sp!, {r4-r7}
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ldmfdeq sp!, {r4-r7}
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bxeq lr /* Return now if done */
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subs r2, r2, #0x04
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sublt r1, r1, #0x03
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@ -314,7 +316,7 @@ ENTRY(memcpy)
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bge .Lmemcpy_bad2_loop16
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adds r2, r2, #0x10
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ldmeqfd sp!, {r4-r7}
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ldmfdeq sp!, {r4-r7}
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bxeq lr /* Return now if done */
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subs r2, r2, #0x04
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sublt r1, r1, #0x02
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@ -375,7 +377,7 @@ ENTRY(memcpy)
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bge .Lmemcpy_bad3_loop16
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adds r2, r2, #0x10
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ldmeqfd sp!, {r4-r7}
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ldmfdeq sp!, {r4-r7}
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bxeq lr /* Return now if done */
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subs r2, r2, #0x04
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sublt r1, r1, #0x01
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@ -404,11 +406,11 @@ ENTRY(memcpy)
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bxeq lr
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ldrb ip, [r1], #0x01
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cmp r2, #0x02
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ldrgeb r2, [r1], #0x01
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ldrbge r2, [r1], #0x01
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strb ip, [r3], #0x01
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ldrgtb ip, [r1]
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strgeb r2, [r3], #0x01
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strgtb ip, [r3]
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ldrbgt ip, [r1]
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strbge r2, [r3], #0x01
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strbgt ip, [r3]
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bx lr
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@ -440,7 +442,7 @@ ENTRY(memcpy)
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ldrb ip, [r1], #0x01
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1: subs r2, r2, #0x01
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strb ip, [r3], #0x01
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ldrneb ip, [r1], #0x01
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ldrbne ip, [r1], #0x01
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bne 1b
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bx lr
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@ -32,6 +32,8 @@
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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.syntax unified
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#ifndef _BCOPY
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/* LINTSTUB: Func: void *memmove(void *, const void *, size_t) */
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ENTRY(memmove)
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@ -86,8 +88,8 @@ ENTRY(bcopy)
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bge .Lmemmove_floop32
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cmn r2, #0x10
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ldmgeia r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmgeia r0!, {r3, r4, r12, lr}
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ldmiage r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmiage r0!, {r3, r4, r12, lr}
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subge r2, r2, #0x10
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ldmia sp!, {r4} /* return r4 */
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@ -96,9 +98,9 @@ ENTRY(bcopy)
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/* blat 12 bytes at a time */
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.Lmemmove_floop12:
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ldmgeia r1!, {r3, r12, lr}
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stmgeia r0!, {r3, r12, lr}
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subges r2, r2, #0x0c
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ldmiage r1!, {r3, r12, lr}
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stmiage r0!, {r3, r12, lr}
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subsge r2, r2, #0x0c
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bge .Lmemmove_floop12
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.Lmemmove_fl12:
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@ -108,23 +110,23 @@ ENTRY(bcopy)
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subs r2, r2, #4
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ldrlt r3, [r1], #4
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strlt r3, [r0], #4
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ldmgeia r1!, {r3, r12}
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stmgeia r0!, {r3, r12}
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ldmiage r1!, {r3, r12}
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stmiage r0!, {r3, r12}
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subge r2, r2, #4
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.Lmemmove_fl4:
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/* less than 4 bytes to go */
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adds r2, r2, #4
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ldmeqia sp!, {r0, pc} /* done */
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ldmiaeq sp!, {r0, pc} /* done */
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/* copy the crud byte at a time */
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cmp r2, #2
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ldrb r3, [r1], #1
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strb r3, [r0], #1
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ldrgeb r3, [r1], #1
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strgeb r3, [r0], #1
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ldrgtb r3, [r1], #1
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strgtb r3, [r0], #1
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ldrbge r3, [r1], #1
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strbge r3, [r0], #1
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ldrbgt r3, [r1], #1
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strbgt r3, [r0], #1
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ldmia sp!, {r0, pc}
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/* erg - unaligned destination */
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@ -135,10 +137,10 @@ ENTRY(bcopy)
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/* align destination with byte copies */
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ldrb r3, [r1], #1
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strb r3, [r0], #1
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ldrgeb r3, [r1], #1
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strgeb r3, [r0], #1
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ldrgtb r3, [r1], #1
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strgtb r3, [r0], #1
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ldrbge r3, [r1], #1
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strbge r3, [r0], #1
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ldrbgt r3, [r1], #1
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strbgt r3, [r0], #1
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subs r2, r2, r12
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blt .Lmemmove_fl4 /* less the 4 bytes */
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@ -353,12 +355,12 @@ ENTRY(bcopy)
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.Lmemmove_bl32:
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cmn r2, #0x10
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ldmgedb r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmgedb r0!, {r3, r4, r12, lr}
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ldmdbge r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
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stmdbge r0!, {r3, r4, r12, lr}
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subge r2, r2, #0x10
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adds r2, r2, #0x14
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ldmgedb r1!, {r3, r12, lr} /* blat a remaining 12 bytes */
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stmgedb r0!, {r3, r12, lr}
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ldmdbge r1!, {r3, r12, lr} /* blat a remaining 12 bytes */
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stmdbge r0!, {r3, r12, lr}
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subge r2, r2, #0x0c
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ldmia sp!, {r4, lr}
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@ -368,8 +370,8 @@ ENTRY(bcopy)
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subs r2, r2, #4
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ldrlt r3, [r1, #-4]!
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strlt r3, [r0, #-4]!
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ldmgedb r1!, {r3, r12}
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stmgedb r0!, {r3, r12}
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ldmdbge r1!, {r3, r12}
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stmdbge r0!, {r3, r12}
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subge r2, r2, #4
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.Lmemmove_bl4:
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@ -381,10 +383,10 @@ ENTRY(bcopy)
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cmp r2, #2
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ldrb r3, [r1, #-1]!
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strb r3, [r0, #-1]!
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ldrgeb r3, [r1, #-1]!
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strgeb r3, [r0, #-1]!
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ldrgtb r3, [r1, #-1]!
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strgtb r3, [r0, #-1]!
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ldrbge r3, [r1, #-1]!
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strbge r3, [r0, #-1]!
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ldrbgt r3, [r1, #-1]!
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strbgt r3, [r0, #-1]!
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RET
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/* erg - unaligned destination */
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@ -394,10 +396,10 @@ ENTRY(bcopy)
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/* align destination with byte copies */
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ldrb r3, [r1, #-1]!
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strb r3, [r0, #-1]!
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ldrgeb r3, [r1, #-1]!
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strgeb r3, [r0, #-1]!
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ldrgtb r3, [r1, #-1]!
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strgtb r3, [r0, #-1]!
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ldrbge r3, [r1, #-1]!
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strbge r3, [r0, #-1]!
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ldrbgt r3, [r1, #-1]!
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strbgt r3, [r0, #-1]!
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subs r2, r2, r12
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blt .Lmemmove_bl4 /* less than 4 bytes to go */
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ands r12, r1, #3
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@ -69,6 +69,8 @@
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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|
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.syntax unified
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||||
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/*
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* memset: Sets a block of memory to the specified value
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*
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@ -125,39 +127,39 @@ ENTRY(memset)
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.Lmemset_loop128:
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subs r1, r1, #0x80
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#ifdef _ARM_ARCH_5E
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strged r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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||||
strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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||||
strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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strdge r2, [ip], #0x08
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||||
strdge r2, [ip], #0x08
|
||||
#else
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia 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}
|
||||
stmiage ip!, {r2-r3}
|
||||
#endif
|
||||
bgt .Lmemset_loop128
|
||||
RETeq /* Zero length so just exit */
|
||||
@ -168,15 +170,15 @@ ENTRY(memset)
|
||||
.Lmemset_loop32:
|
||||
subs r1, r1, #0x20
|
||||
#ifdef _ARM_ARCH_5E
|
||||
strged r2, [ip], #0x08
|
||||
strged r2, [ip], #0x08
|
||||
strged r2, [ip], #0x08
|
||||
strged r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
#else
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
#endif
|
||||
bgt .Lmemset_loop32
|
||||
RETeq /* Zero length so just exit */
|
||||
@ -185,11 +187,11 @@ ENTRY(memset)
|
||||
|
||||
/* Deal with 16 bytes or more */
|
||||
#ifdef _ARM_ARCH_5E
|
||||
strged r2, [ip], #0x08
|
||||
strged r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
strdge r2, [ip], #0x08
|
||||
#else
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmgeia ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
stmiage ip!, {r2-r3}
|
||||
#endif
|
||||
RETeq /* Zero length so just exit */
|
||||
|
||||
@ -212,17 +214,17 @@ ENTRY(memset)
|
||||
#endif
|
||||
|
||||
strb r3, [ip], #0x01 /* Set 1 byte */
|
||||
strgeb r3, [ip], #0x01 /* Set another byte */
|
||||
strgtb r3, [ip] /* and a third */
|
||||
strbge r3, [ip], #0x01 /* Set another byte */
|
||||
strbgt r3, [ip] /* and a third */
|
||||
RET /* Exit */
|
||||
|
||||
.Lmemset_wordunaligned:
|
||||
rsb r2, r2, #0x004
|
||||
strb r3, [ip], #0x01 /* Set 1 byte */
|
||||
cmp r2, #0x02
|
||||
strgeb r3, [ip], #0x01 /* Set another byte */
|
||||
strbge r3, [ip], #0x01 /* Set another byte */
|
||||
sub r1, r1, r2
|
||||
strgtb r3, [ip], #0x01 /* and a third */
|
||||
strbgt r3, [ip], #0x01 /* and a third */
|
||||
cmp r1, #0x04 /* More than 4 bytes left? */
|
||||
bge .Lmemset_wordaligned /* Yup */
|
||||
|
||||
@ -231,8 +233,8 @@ ENTRY(memset)
|
||||
RETeq /* Zero length so exit */
|
||||
strb r3, [ip], #0x01 /* Set 1 byte */
|
||||
cmp r1, #0x02
|
||||
strgeb r3, [ip], #0x01 /* Set another byte */
|
||||
strgtb r3, [ip] /* and a third */
|
||||
strbge r3, [ip], #0x01 /* Set another byte */
|
||||
strbgt r3, [ip] /* and a third */
|
||||
RET /* Exit */
|
||||
#ifdef _BZERO
|
||||
END(bzero)
|
||||
|
||||
@ -27,6 +27,8 @@
|
||||
#include <machine/asm.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
.syntax unified
|
||||
|
||||
ENTRY(strlen)
|
||||
mov r1, #0
|
||||
/* Check that the pointer is aligned on 32 bits. */
|
||||
@ -53,23 +55,23 @@ ENTRY(strlen)
|
||||
addne r1, r1, #1
|
||||
.Ldo_3:
|
||||
#ifndef __ARMEB__
|
||||
andnes r3, r2, #0x0000ff00
|
||||
andsne r3, r2, #0x0000ff00
|
||||
#else
|
||||
andnes r3, r2, #0x00ff0000
|
||||
andsne r3, r2, #0x00ff0000
|
||||
#endif
|
||||
addne r1, r1, #1
|
||||
.Ldo_2:
|
||||
#ifndef __ARMEB__
|
||||
andnes r3, r2, #0x00ff0000
|
||||
andsne r3, r2, #0x00ff0000
|
||||
#else
|
||||
andnes r3, r2, #0x0000ff00
|
||||
andsne r3, r2, #0x0000ff00
|
||||
#endif
|
||||
addne r1, r1, #1
|
||||
.Ldo_1:
|
||||
#ifndef __ARMEB__
|
||||
andnes r3, r2, #0xff000000
|
||||
andsne r3, r2, #0xff000000
|
||||
#else
|
||||
andnes r3, r2, #0x000000ff
|
||||
andsne r3, r2, #0x000000ff
|
||||
#endif
|
||||
addne r1, r1, #1
|
||||
bne .Loop
|
||||
|
||||
Loading…
Reference in New Issue
Block a user