From 9d507419db1289033c59da6976f8675f24ab873f Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 15 Mar 2012 19:56:36 -0400 Subject: [PATCH] remove special nan handling from x86 sqrt asm a double precision nan, when converted to extended (80-bit) precision, will never end in 0x400, since the corresponding bits do not exist in the original double precision value. thus there's no need to waste time and code size on this check. --- src/math/i386/sqrt.s | 3 --- 1 file changed, 3 deletions(-) diff --git a/src/math/i386/sqrt.s b/src/math/i386/sqrt.s index 1bd3b05e..8289d094 100644 --- a/src/math/i386/sqrt.s +++ b/src/math/i386/sqrt.s @@ -10,9 +10,6 @@ sqrt: fldl 4(%esp) and $0x7ff,%ecx cmp $0x400,%ecx jnz 1f - mov 8(%esp),%cx - inc %cx - jo 1f and $0x200,%eax sub $0x100,%eax sub %eax,(%esp)