diff options
| author | Eric Andersen <andersen@codepoet.org> | 2001-11-24 03:46:25 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2001-11-24 03:46:25 +0000 |
| commit | 26d7ea91124a9405dff7755a78cfb6232dd15d80 (patch) | |
| tree | c14436f6013bd76a2a339deb1424e02e73419957 /libm/sign.c | |
| parent | 683c13fcc85276e9a030d6a98d50366bef03a6b6 (diff) | |
Move powerpc specific optimizations (courtesy of apple) to powerpc
subdir. Put together a theoretical framework for adding arch specific
optimizations. Havn't tried this yet but it looks correct...
-Erik
Diffstat (limited to 'libm/sign.c')
| -rw-r--r-- | libm/sign.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/libm/sign.c b/libm/sign.c deleted file mode 100644 index 524d6afe3..000000000 --- a/libm/sign.c +++ /dev/null @@ -1,58 +0,0 @@ -#if defined(__ppc__) -/******************************************************************************* -* * -* File sign.c, * -* Functions copysign and __signbitd. * -* For PowerPC based machines. * -* * -* Copyright © 1991, 2001 Apple Computer, Inc. All rights reserved. * -* * -* Written by Ali Sazegari, started on June 1991. * -* * -* August 26 1991: no CFront Version 1.1d17 warnings. * -* September 06 1991: passes the test suite with invalid raised on * -* signaling nans. sane rom code behaves the same. * -* September 24 1992: took the ̉#include support.hÓ out. * -* Dcember 02 1992: PowerPC port. * -* July 20 1994: __fabs added * -* July 21 1994: deleted unnecessary functions: neg, COPYSIGNnew, * -* and SIGNNUMnew. * -* April 11 2001: first port to os x using gcc. * -* removed fabs and deffered to gcc for direct * -* instruction generation. * -* * -*******************************************************************************/ - -#include "fp_private.h" - -/******************************************************************************* -* * -* Function copysign. * -* Implementation of copysign for the PowerPC. * -* * -******************************************************************************** -* Note: The order of the operands in this function is reversed from that * -* suggested in the IEEE standard 754. * -*******************************************************************************/ - -double copysign ( double arg2, double arg1 ) - { - union - { - dHexParts hex; - double dbl; - } x, y; - -/******************************************************************************* -* No need to flush NaNs out. * -*******************************************************************************/ - - x.dbl = arg1; - y.dbl = arg2; - - y.hex.high = y.hex.high & 0x7FFFFFFF; - y.hex.high = ( y.hex.high | ( x.hex.high & dSgnMask ) ); - - return y.dbl; - } -#endif /* __ppc__ */ |