elf.h: add ELFCOMPRESS_ZSTD

[musl] / src / setjmp / x86_64 / longjmp.s

diff --git a/src/setjmp/x86_64/longjmp.s b/src/setjmp/x86_64/longjmp.s
index bb88afa..1b2661c 100644 (file)
--- a/src/setjmp/x86_64/longjmp.s
+++ b/src/setjmp/x86_64/longjmp.s
@@ -5,11 +5,9 @@
 .type longjmp,@function
 _longjmp:
 longjmp:
-       mov %esi,%eax           /* val will be longjmp return */
-       test %esi,%esi
-       jnz 1f
-       inc %eax                /* if val==0, val=1 per longjmp semantics */
-1:
+       xor %eax,%eax
+       cmp $1,%esi             /* CF = val ? 0 : 1 */
+       adc %esi,%eax           /* eax = val + !val */
        mov (%rdi),%rbx         /* rdi is the jmp_buf, restore regs from it */
        mov 8(%rdi),%rbp
        mov 16(%rdi),%r12