diff options
| author | Eric Anholt <[email protected]> | 2010-11-15 16:01:04 +0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2010-11-23 09:23:30 -0800 |
| commit | df24450bac404e2acd9569340dacc6e537fb919c (patch) | |
| tree | e14d1c7f6d1d033e14c85d6d8d0fada36bb85ed6 /src/mesa | |
| parent | 8a7cf99457f5061c3c5aae48f14fb23b2ca07503 (diff) | |
i965: Use the new embedded compare in SEL on gen6 for VS MIN and MAX opcodes.
Cuts the extra CMP instruction that used to precede SEL.
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index 7e43324a1f9..a13c3cae0bd 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -574,9 +574,18 @@ static void emit_max( struct brw_compile *p, struct brw_reg arg0, struct brw_reg arg1 ) { - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_GE, arg0, arg1); - brw_SEL(p, dst, arg0, arg1); - brw_set_predicate_control(p, BRW_PREDICATE_NONE); + struct intel_context *intel = &p->brw->intel; + + if (intel->gen >= 6) { + brw_set_conditionalmod(p, BRW_CONDITIONAL_GE); + brw_SEL(p, dst, arg0, arg1); + brw_set_conditionalmod(p, BRW_CONDITIONAL_NONE); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + } else { + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_GE, arg0, arg1); + brw_SEL(p, dst, arg0, arg1); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + } } static void emit_min( struct brw_compile *p, @@ -584,9 +593,18 @@ static void emit_min( struct brw_compile *p, struct brw_reg arg0, struct brw_reg arg1 ) { - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0, arg1); - brw_SEL(p, dst, arg0, arg1); - brw_set_predicate_control(p, BRW_PREDICATE_NONE); + struct intel_context *intel = &p->brw->intel; + + if (intel->gen >= 6) { + brw_set_conditionalmod(p, BRW_CONDITIONAL_L); + brw_SEL(p, dst, arg0, arg1); + brw_set_conditionalmod(p, BRW_CONDITIONAL_NONE); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + } else { + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0, arg1); + brw_SEL(p, dst, arg0, arg1); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + } } static void emit_math1_gen4(struct brw_vs_compile *c, |