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draw: faster LIT(), incorrect though

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This commit is contained in:
Keith Whitwell 2008-05-23 09:14:17 +01:00
parent adc1f88fc9
commit 3b41d619a1
1 changed files with 6 additions and 0 deletions
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6
src/gallium/auxiliary/draw/draw_vs_aos.c
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@ -1098,7 +1098,13 @@ static boolean emit_LIT( struct aos_compilation *cp, const struct tgsi_full_inst
* Note: use 1.0 to avoid passing zero to
*/
x87_fldz(cp->func); /* 1 0 */
#if 1
x87_fld1(cp->func); /* 1 0 */
#else
/* Correct but slow due to fp exceptions generated in fyl2x - fix me.
*/
x87_fldz(cp->func); /* 1 0 */
#endif
x87_fld_src(cp, &op->FullSrcRegisters[0], 1); /* a1 1 0 */
x87_fcomi(cp->func, st2); /* a1 1 0 */
x87_fcmovb(cp->func, st1); /* a1' 1 0 */