Signed-off-by: Ruiling Song <[email protected]>
---
backend/src/backend/gen_insn_selection.cpp | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/backend/src/backend/gen_insn_selection.cpp
b/backend/src/backend/gen_insn_selection.cpp
index d0e3d0b..463d36e 100644
--- a/backend/src/backend/gen_insn_selection.cpp
+++ b/backend/src/backend/gen_insn_selection.cpp
@@ -2066,6 +2066,7 @@ namespace gbe
/*! Register the pattern for all opcodes of the family */
MulAddInstructionPattern(void) : SelectionPattern(2, 1) {
this->opcodes.push_back(ir::OP_ADD);
+ this->opcodes.push_back(ir::OP_SUB);
}
/*! Implements base class */
@@ -2095,7 +2096,8 @@ namespace gbe
GBE_ASSERT(cast<ir::BinaryInstruction>(child0->insn).getType() ==
TYPE_FLOAT);
const GenRegister src0 = sel.selReg(child0->insn.getSrc(0),
TYPE_FLOAT);
const GenRegister src1 = sel.selReg(child0->insn.getSrc(1),
TYPE_FLOAT);
- const GenRegister src2 = sel.selReg(insn.getSrc(1), TYPE_FLOAT);
+ GenRegister src2 = sel.selReg(insn.getSrc(1), TYPE_FLOAT);
+ if(insn.getOpcode() == ir::OP_SUB) src2 = GenRegister::negate(src2);
sel.MAD(dst, src2, src0, src1); // order different on HW!
if (child0->child[0]) child0->child[0]->isRoot = 1;
if (child0->child[1]) child0->child[1]->isRoot = 1;
@@ -2104,9 +2106,10 @@ namespace gbe
}
if (child1 && child1->insn.getOpcode() == OP_MUL) {
GBE_ASSERT(cast<ir::BinaryInstruction>(child1->insn).getType() ==
TYPE_FLOAT);
- const GenRegister src0 = sel.selReg(child1->insn.getSrc(0),
TYPE_FLOAT);
+ GenRegister src0 = sel.selReg(child1->insn.getSrc(0), TYPE_FLOAT);
const GenRegister src1 = sel.selReg(child1->insn.getSrc(1),
TYPE_FLOAT);
const GenRegister src2 = sel.selReg(insn.getSrc(0), TYPE_FLOAT);
+ if(insn.getOpcode() == ir::OP_SUB) src0 = GenRegister::negate(src0);
sel.MAD(dst, src2, src0, src1); // order different on HW!
if (child1->child[0]) child1->child[0]->isRoot = 1;
if (child1->child[1]) child1->child[1]->isRoot = 1;
--
1.7.10.4
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