diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2003-03-04 16:33:53 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2003-03-04 16:33:53 +0000 |
| commit | f9b1e5241facc8cf255c258082d5cb5b04783e93 (patch) | |
| tree | ea3bb1859dba42e746b0f14dce5193b81c922ac5 /src/mesa/main/imports.h | |
| parent | 386578c5bcc5c6701a6b9692cdc04cfe4064ca06 (diff) | |
added _mesa_inv_sqrtf() and INV_SQRTF() (Josh Vanderhoof)
Diffstat (limited to 'src/mesa/main/imports.h')
| -rw-r--r-- | src/mesa/main/imports.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h index 354819f43f..73c3b6eb42 100644 --- a/src/mesa/main/imports.h +++ b/src/mesa/main/imports.h @@ -1,4 +1,4 @@ -/* $Id: imports.h,v 1.16 2003/03/03 21:44:39 brianp Exp $ */ +/* $Id: imports.h,v 1.17 2003/03/04 16:33:53 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -169,6 +169,16 @@ float asm_sqrt (float x); /*** + *** INV_SQRTF: single-precision inverse square root + ***/ +#if 0 +#define INV_SQRTF(X) _mesa_inv_sqrt(X) +#else +#define INV_SQRTF(X) (1.0F / SQRTF(X)) /* this is faster on a P4 */ +#endif + + +/*** *** LOG2: Log base 2 of float ***/ #ifdef USE_IEEE @@ -588,6 +598,9 @@ _mesa_sqrtd(double x); extern float _mesa_sqrtf(float x); +extern float +_mesa_inv_sqrtf(float x); + extern double _mesa_pow(double x, double y); |