From df24450bac404e2acd9569340dacc6e537fb919c Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 15 Nov 2010 16:01:04 +0800 Subject: 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. --- src/mesa/drivers/dri/i965/brw_vs_emit.c | 30 ++++++++++++++++++++++++------ 1 file 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, -- cgit v1.2.3