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authorRich Felker <dalias@aerifal.cx>2012-03-15 01:55:54 -0400
committerRich Felker <dalias@aerifal.cx>2012-03-15 01:55:54 -0400
commit46702f68f98244f7384d6ac1742a452f0d7a2610 (patch)
treea1de64f25ddc30af458711c70f46efd6a3bf6f8f /src
parent809556e60a3359f646946879dd94c4760e5b8e84 (diff)
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avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9 recommendation
Diffstat (limited to 'src')
-rw-r--r--src/math/i386/sqrt.s4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/math/i386/sqrt.s b/src/math/i386/sqrt.s
index 8289d094..33157044 100644
--- a/src/math/i386/sqrt.s
+++ b/src/math/i386/sqrt.s
@@ -10,6 +10,10 @@ sqrt:	fldl 4(%esp)
 	and $0x7ff,%ecx
 	cmp $0x400,%ecx
 	jnz 1f
+	mov 8(%esp),%ecx
+	or $0xffff8000,%ecx
+	inc %ecx
+	jz 1f
 	and $0x200,%eax
 	sub $0x100,%eax
 	sub %eax,(%esp)