diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2001-06-15 15:22:07 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2001-06-15 15:22:07 +0000 |
| commit | 24ae7c4c1f18c3086a779a2ee8f480ee5f4e7612 (patch) | |
| tree | 5b196d48ff5c11557acc305e3450a5f80ba9901d /src/mesa/main | |
| parent | e4276667dafc8de0c6e64af8300fc7598437de6e (diff) | |
Added fi_type union typedef to glheader.h.
Replace various float/int casts with the fi_type union cast.
Fixes -fstrict-aliasing problems.
Diffstat (limited to 'src/mesa/main')
| -rw-r--r-- | src/mesa/main/glheader.h | 12 | ||||
| -rw-r--r-- | src/mesa/main/texutil.c | 4 |
2 files changed, 13 insertions, 3 deletions
diff --git a/src/mesa/main/glheader.h b/src/mesa/main/glheader.h index 0324b42ffd9..596bd2d01ee 100644 --- a/src/mesa/main/glheader.h +++ b/src/mesa/main/glheader.h @@ -1,4 +1,4 @@ -/* $Id: glheader.h,v 1.20 2001/05/14 23:11:12 brianp Exp $ */ +/* $Id: glheader.h,v 1.21 2001/06/15 15:22:07 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -241,5 +241,15 @@ typedef struct tagPIXELFORMATDESCRIPTOR PIXELFORMATDESCRIPTOR, *PPIXELFORMATDESC #endif +/* + * Sometimes we treat GLfloats as GLints. On x86 systems, moving a float + * as a int (thereby using integer registers instead of fp registers) is + * a performance win. Typically, this can be done with ordinary casts. + * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0) + * these casts generate warnings. + * The following union typedef is used to solve that. + */ +typedef union { GLfloat f; GLint i; } fi_type; + #endif /* GLHEADER_H */ diff --git a/src/mesa/main/texutil.c b/src/mesa/main/texutil.c index e7c8fa7608a..6231f589af2 100644 --- a/src/mesa/main/texutil.c +++ b/src/mesa/main/texutil.c @@ -1,4 +1,4 @@ -/* $Id: texutil.c,v 1.24 2001/05/02 21:02:38 brianp Exp $ */ +/* $Id: texutil.c,v 1.25 2001/06/15 15:22:08 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -415,7 +415,7 @@ CONVERT_ARGB4444( texsubimage3d ) dst = (s >> 1) | ((s & 1) << 15); } #define CONVERT_TEXEL_DWORD( dst, src ) \ - { const GLuint s = *(GLuint *)src; \ + { const GLuint s = ((fi_type *)src)->i; \ dst = (((s & 0xfffefffe) >> 1) | \ ((s & 0x00010001) << 15)); } |