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Message-Id: <20200811181116.8433-2-amonakov@ispras.ru>
Date: Tue, 11 Aug 2020 21:11:15 +0300
From: Alexander Monakov <amonakov@...ras.ru>
To: musl@...ts.openwall.com
Subject: [PATCH 2/3] setjmp: avoid useless REX-prefix on xor %eax, %eax
---
src/setjmp/x32/setjmp.s | 2 +-
src/setjmp/x86_64/setjmp.s | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/setjmp/x32/setjmp.s b/src/setjmp/x32/setjmp.s
index 98f58b8d..d95e4853 100644
--- a/src/setjmp/x32/setjmp.s
+++ b/src/setjmp/x32/setjmp.s
@@ -18,5 +18,5 @@ setjmp:
mov %rdx,48(%rdi)
mov (%rsp),%rdx /* save return addr ptr for new rip */
mov %rdx,56(%rdi)
- xor %rax,%rax /* always return 0 */
+ xor %eax,%eax /* always return 0 */
ret
diff --git a/src/setjmp/x86_64/setjmp.s b/src/setjmp/x86_64/setjmp.s
index 98f58b8d..d95e4853 100644
--- a/src/setjmp/x86_64/setjmp.s
+++ b/src/setjmp/x86_64/setjmp.s
@@ -18,5 +18,5 @@ setjmp:
mov %rdx,48(%rdi)
mov (%rsp),%rdx /* save return addr ptr for new rip */
mov %rdx,56(%rdi)
- xor %rax,%rax /* always return 0 */
+ xor %eax,%eax /* always return 0 */
ret
--
2.11.0
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