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setjmp: avoid useless REX-prefix on xor %eax, %eax

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This commit is contained in:
Alexander Monakov 2020-08-11 21:11:15 +03:00 • committed by Rich Felker
parent 21431a0e43
commit c6a6fe4ccd
2 changed files with 2 additions and 2 deletions
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2
src/setjmp/x32/setjmp.s
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@ -18,5 +18,5 @@ setjmp:
mov %rdx,48(%rdi) mov %rdx,48(%rdi)
mov (%rsp),%rdx /* save return addr ptr for new rip */ mov (%rsp),%rdx /* save return addr ptr for new rip */
mov %rdx,56(%rdi) mov %rdx,56(%rdi)
xor %rax,%rax /* always return 0 */ xor %eax,%eax /* always return 0 */
ret ret

2
src/setjmp/x86_64/setjmp.s
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@ -18,5 +18,5 @@ setjmp:
mov %rdx,48(%rdi) mov %rdx,48(%rdi)
mov (%rsp),%rdx /* save return addr ptr for new rip */ mov (%rsp),%rdx /* save return addr ptr for new rip */
mov %rdx,56(%rdi) mov %rdx,56(%rdi)
xor %rax,%rax /* always return 0 */ xor %eax,%eax /* always return 0 */
ret ret