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authorRich Felker <dalias@aerifal.cx>2012-03-15 12:16:51 -0400
committerRich Felker <dalias@aerifal.cx>2012-03-15 12:16:51 -0400
commit1295848efb9171011e79610a5c3ab7c20859ea36 (patch)
treebe7e9fcda2a8f01b55dfff5f09a286783af5c575 /src
parent5657cc58e5e135bba85c9a7045e10d8de4b1be0a (diff)
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simplify nan check in sqrt (x86 asm); result of sqrt is never negative
Diffstat (limited to 'src')
-rw-r--r--src/math/i386/sqrt.s7
1 files changed, 3 insertions, 4 deletions
diff --git a/src/math/i386/sqrt.s b/src/math/i386/sqrt.s
index 33157044..1bd3b05e 100644
--- a/src/math/i386/sqrt.s
+++ b/src/math/i386/sqrt.s
@@ -10,10 +10,9 @@ sqrt:	fldl 4(%esp)
 	and $0x7ff,%ecx
 	cmp $0x400,%ecx
 	jnz 1f
-	mov 8(%esp),%ecx
-	or $0xffff8000,%ecx
-	inc %ecx
-	jz 1f
+	mov 8(%esp),%cx
+	inc %cx
+	jo 1f
 	and $0x200,%eax
 	sub $0x100,%eax
 	sub %eax,(%esp)