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authorEric Anholt <eric@anholt.net>2010-11-15 16:01:04 +0800
committerEric Anholt <eric@anholt.net>2010-11-23 09:23:30 -0800
commitdf24450bac404e2acd9569340dacc6e537fb919c (patch)
treee14d1c7f6d1d033e14c85d6d8d0fada36bb85ed6
parent8a7cf99457f5061c3c5aae48f14fb23b2ca07503 (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.
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c30
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 7e43324a1f..a13c3cae0b 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,