[src/trunk]: src/lib/libc/arch/x86_64/gen simplify: it doesn't need an i387 t...

[drochner <drochner%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cd769a5cf8f7
branches:  trunk
changeset: 559768:cd769a5cf8f7
user:      drochner <drochner%NetBSD.org@localhost>
date:      Tue Mar 23 17:11:35 2004 +0000

description:
simplify: it doesn't need an i387 to kill a sign bit

diffstat:

 lib/libc/arch/x86_64/gen/fabs.S |  20 +++++++++-----------
 1 files changed, 9 insertions(+), 11 deletions(-)

diffs (32 lines):

diff -r eba0e5ad9352 -r cd769a5cf8f7 lib/libc/arch/x86_64/gen/fabs.S
--- a/lib/libc/arch/x86_64/gen/fabs.S   Tue Mar 23 16:33:47 2004 +0000
+++ b/lib/libc/arch/x86_64/gen/fabs.S   Tue Mar 23 17:11:35 2004 +0000
@@ -1,19 +1,17 @@
-/*     $NetBSD: fabs.S,v 1.2 2004/02/26 19:19:06 drochner Exp $        */
+/*     $NetBSD: fabs.S,v 1.3 2004/03/23 17:11:35 drochner Exp $        */
 
 #include <machine/asm.h>
 #if defined(LIBC_SCCS)
-       RCSID("$NetBSD: fabs.S,v 1.2 2004/02/26 19:19:06 drochner Exp $")
+       RCSID("$NetBSD: fabs.S,v 1.3 2004/03/23 17:11:35 drochner Exp $")
 #endif
 
-/*
- * Ok, this sucks. Is there really no way to push an xmm register onto
- * the FP stack directly?
- */
+       .section .rodata
+       .align 8
+__signmask:
+       .long 0xffffffff
+       .long 0x7fffffff
 
 ENTRY(fabs)
-       movsd   %xmm0, -8(%rsp)
-       fldl    -8(%rsp)
-       fabs
-       fstpl   -8(%rsp)
-       movsd   -8(%rsp),%xmm0
+       movsd   __signmask(%rip),%xmm1
+       andpd   %xmm1,%xmm0
        ret