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avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9 recommendation

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Rich Felker 2012-03-15 01:55:54 -04:00
commit 46702f68f9
1 changed files with 4 additions and 0 deletions
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4
src/math/i386/sqrt.s
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@ -10,6 +10,10 @@ sqrt: fldl 4(%esp)
and $0x7ff,%ecx and $0x7ff,%ecx
cmp $0x400,%ecx cmp $0x400,%ecx
jnz 1f jnz 1f
mov 8(%esp),%ecx
or $0xffff8000,%ecx
inc %ecx
jz 1f
and $0x200,%eax and $0x200,%eax
sub $0x100,%eax sub $0x100,%eax
sub %eax,(%esp) sub %eax,(%esp)