Mesa (master): i965/vs: Add support for translating ir_triop_fma into MAD.
Matt Turner
mattst88 at kemper.freedesktop.org
Tue Aug 27 22:09:32 UTC 2013
Module: Mesa
Branch: master
Commit: 4929be0b5fad98f6f7303a07dd24e4cf6f417467
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=4929be0b5fad98f6f7303a07dd24e4cf6f417467
Author: Matt Turner <mattst88 at gmail.com>
Date: Fri Aug 2 10:28:16 2013 -0700
i965/vs: Add support for translating ir_triop_fma into MAD.
Reviewed-by: Paul Berry <stereotype441 at gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/mesa/drivers/dri/i965/brw_vec4.h | 1 +
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 11 +++++++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h
index 6be15fe..e970162 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.h
+++ b/src/mesa/drivers/dri/i965/brw_vec4.h
@@ -440,6 +440,7 @@ public:
vec4_instruction *FBH(dst_reg dst, src_reg value);
vec4_instruction *FBL(dst_reg dst, src_reg value);
vec4_instruction *CBIT(dst_reg dst, src_reg value);
+ vec4_instruction *MAD(dst_reg dst, src_reg c, src_reg b, src_reg a);
int implied_mrf_writes(vec4_instruction *inst);
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index d0959b7..68e0cb9 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -144,6 +144,7 @@ ALU3(BFI2)
ALU1(FBH)
ALU1(FBL)
ALU1(CBIT)
+ALU3(MAD)
/** Gen4 predicated IF. */
vec4_instruction *
@@ -1711,6 +1712,16 @@ vec4_visitor::visit(ir_expression *ir)
assert(!"should have been lowered by vec_index_to_cond_assign");
break;
+ case ir_triop_fma:
+ op[0] = fix_3src_operand(op[0]);
+ op[1] = fix_3src_operand(op[1]);
+ op[2] = fix_3src_operand(op[2]);
+ /* Note that the instruction's argument order is reversed from GLSL
+ * and the IR.
+ */
+ emit(MAD(result_dst, op[2], op[1], op[0]));
+ break;
+
case ir_triop_lrp:
op[0] = fix_3src_operand(op[0]);
op[1] = fix_3src_operand(op[1]);
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