diff options
Diffstat (limited to 'src/mesa/main/imports.h')
| -rw-r--r-- | src/mesa/main/imports.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h index a928b20ad56..b69b5fa31a1 100644 --- a/src/mesa/main/imports.h +++ b/src/mesa/main/imports.h @@ -198,6 +198,20 @@ extern void _ext_mesa_free_pixelbuffer( void *pb ); /*@}*/ +/**********************************************************************/ + + +/** + * 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; + + /********************************************************************** * Math macros |