From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 15 Mar 2012 16:16:51 +0000 (-0400)
Subject: simplify nan check in sqrt (x86 asm); result of sqrt is never negative
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=1295848efb9171011e79610a5c3ab7c20859ea36

simplify nan check in sqrt (x86 asm); result of sqrt is never negative
---

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)