From: Matt Turner <matts...@gmail.com>
Shader-db results:
GM45:
total instructions in shared programs: 4060151 -> 4059575 (-0.01%)
instructions in affected programs: 81478 -> 80902 (-0.71%)
helped: 441
HURT: 4
GM45 NIR:
total instructions in shared programs: 4079065 -> 4078671 (-0.01%)
instructions in affected programs: 67196 -> 66802 (-0.59%)
helped: 398
HURT: 4
Iron Lake:
total instructions in shared programs: 5477330 -> 5476586 (-0.01%)
instructions in affected programs: 92444 -> 91700 (-0.80%)
helped: 472
HURT: 4
Iron Lake NIR:
total instructions in shared programs: 5675880 -> 5675486 (-0.01%)
instructions in affected programs: 67196 -> 66802 (-0.59%)
helped: 398
HURT: 4
Sandy Bridge:
total instructions in shared programs: 7307710 -> 7305083 (-0.04%)
instructions in affected programs: 282903 -> 280276 (-0.93%)
helped: 1506
Sandy Bridge NIR:
total instructions in shared programs: 7329198 -> 7328404 (-0.01%)
instructions in affected programs: 133777 -> 132983 (-0.59%)
helped: 682
Ivy Bridge:
total instructions in shared programs: 6763747 -> 6763036 (-0.01%)
instructions in affected programs: 79009 -> 78298 (-0.90%)
helped: 573
Ivy Bridge NIR:
total instructions in shared programs: 6765185 -> 6764738 (-0.01%)
instructions in affected programs: 61743 -> 61296 (-0.72%)
helped: 445
Haswell:
total instructions in shared programs: 6223429 -> 6222718 (-0.01%)
instructions in affected programs: 77427 -> 76716 (-0.92%)
helped: 573
Haswell NIR:
total instructions in shared programs: 6180970 -> 6180523 (-0.01%)
instructions in affected programs: 61743 -> 61296 (-0.72%)
helped: 445
Broadwell:
total instructions in shared programs: 7284540 -> 7284103 (-0.01%)
instructions in affected programs: 31526 -> 31089 (-1.39%)
helped: 251
Broadwell NIR:
total instructions in shared programs: 7500487 -> 7500487 (0.00%)
instructions in affected programs: 0 -> 0
Reviewed-by: Ben Widawsky <b...@bwidawsk.net>
Reviewed-by: Ian Romanick <ian.d.roman...@intel.com>
---
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 15 +++++++++++++++
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 20 ++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 3622e65..574c266 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -700,6 +700,21 @@ fs_visitor::visit(ir_expression *ir)
/* Deal with the real oddball stuff first */
switch (ir->operation) {
+ case ir_unop_neg: {
+ if (!ir->type->is_float())
+ break;
+
+ ir_expression *mul = ir->operands[0]->as_expression();
+ if (mul && mul->operation == ir_binop_mul) {
+ mul->accept(this);
+ fs_inst *mul_inst = (fs_inst *) this->instructions.get_tail();
+ assert(mul_inst->opcode == BRW_OPCODE_MUL);
+
+ mul_inst->src[1].negate = true;
+ return;
+ }
+ break;
+ }
case ir_binop_add:
if (brw->gen <= 5 && try_emit_line(ir))
return;
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index ffbe04d..b9d6087 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -1303,6 +1303,26 @@ vec4_visitor::visit(ir_expression *ir)
src_reg op[ARRAY_SIZE(ir->operands)];
vec4_instruction *inst;
+ switch (ir->operation) {
+ case ir_unop_neg: {
+ if (!ir->type->is_float())
+ break;
+
+ ir_expression *mul = ir->operands[0]->as_expression();
+ if (mul && mul->operation == ir_binop_mul) {
+ mul->accept(this);
+ vec4_instruction *mul_inst = (vec4_instruction *)
this->instructions.get_tail();
+ assert(mul_inst->opcode == BRW_OPCODE_MUL);
+
+ mul_inst->src[1].negate = true;
+ return;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+
if (ir->operation == ir_binop_add) {
if (try_emit_mad(ir))
return;
--
2.1.0
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