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convert arm memcpy asm to UAL, remove .word hacks 

contrary to commit 9367fe9261, all
relevant gas versions actually do support .syntax unified.
This commit is contained in:
Rich Felker 2015-10-18 20:17:43 -04:00 committed by Rich Felker
parent 918b1c1d17
commit 8984b5837a
1 changed files with 24 additions and 22 deletions
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46
src/string/armel/memcpy.s
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@ -42,6 +42,8 @@
* of prefetch code that is not compatible with older cpus.
*/
.syntax unified
.global memcpy
.type memcpy,%function
memcpy:
@ -73,12 +75,12 @@ memcpy:
*/
movs r12, r3, lsl #31
sub r2, r2, r3 /* we know that r3 <= r2 because r2 >= 4 */
.word 0x44d13001 /* ldrbmi r3, [r1], #1 */
.word 0x24d14001 /* ldrbcs r4, [r1], #1 */
.word 0x24d1c001 /* ldrbcs r12,[r1], #1 */
.word 0x44c03001 /* strbmi r3, [r0], #1 */
.word 0x24c04001 /* strbcs r4, [r0], #1 */
.word 0x24c0c001 /* strbcs r12,[r0], #1 */
ldrbmi r3, [r1], #1
ldrbcs r4, [r1], #1
ldrbcs r12,[r1], #1
strbmi r3, [r0], #1
strbcs r4, [r0], #1
strbcs r12,[r0], #1
src_aligned:
@ -177,12 +179,12 @@ less_than_32_left:
stmmi r0!, {r8, r9}
movs r12, r2, lsl #30
ldrcs r3, [r1], #4 /* 4 bytes */
.word 0x40d140b2 /* ldrhmi r4, [r1], #2 */ /* 2 bytes */
ldrhmi r4, [r1], #2 /* 2 bytes */
strcs r3, [r0], #4
.word 0x40c040b2 /* strhmi r4, [r0], #2 */
strhmi r4, [r0], #2
tst r2, #0x1
.word 0x15d13000 /* ldrbne r3, [r1] */ /* last byte */
.word 0x15c03000 /* strbne r3, [r0] */
ldrbne r3, [r1] /* last byte */
strbne r3, [r0]
/* we're done! restore everything and return */
1: ldmfd sp!, {r5-r11}
@ -224,11 +226,11 @@ non_congruent:
* becomes aligned to 32 bits (r5 = nb of words to copy for alignment)
*/
movs r5, r5, lsl #31
.word 0x44c03001 /* strbmi r3, [r0], #1 */
strbmi r3, [r0], #1
movmi r3, r3, lsr #8
.word 0x24c03001 /* strbcs r3, [r0], #1 */
strbcs r3, [r0], #1
movcs r3, r3, lsr #8
.word 0x24c03001 /* strbcs r3, [r0], #1 */
strbcs r3, [r0], #1
movcs r3, r3, lsr #8
cmp r2, #4
@ -355,23 +357,23 @@ less_than_thirtytwo:
partial_word_tail:
/* we have a partial word in the input buffer */
movs r5, lr, lsl #(31-3)
.word 0x44c03001 /* strbmi r3, [r0], #1 */
strbmi r3, [r0], #1
movmi r3, r3, lsr #8
.word 0x24c03001 /* strbcs r3, [r0], #1 */
strbcs r3, [r0], #1
movcs r3, r3, lsr #8
.word 0x24c03001 /* strbcs r3, [r0], #1 */
strbcs r3, [r0], #1
/* Refill spilled registers from the stack. Don't update sp. */
ldmfd sp, {r5-r11}
copy_last_3_and_return:
movs r2, r2, lsl #31 /* copy remaining 0, 1, 2 or 3 bytes */
.word 0x44d12001 /* ldrbmi r2, [r1], #1 */
.word 0x24d13001 /* ldrbcs r3, [r1], #1 */
.word 0x25d1c000 /* ldrbcs r12,[r1] */
.word 0x44c02001 /* strbmi r2, [r0], #1 */
.word 0x24c03001 /* strbcs r3, [r0], #1 */
.word 0x25c0c000 /* strbcs r12,[r0] */
ldrbmi r2, [r1], #1
ldrbcs r3, [r1], #1
ldrbcs r12,[r1]
strbmi r2, [r0], #1
strbcs r3, [r0], #1
strbcs r12,[r0]
/* we're done! restore sp and spilled registers and return */
add sp, sp, #28