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-rw-r--r--src/video_core/shader/decode/arithmetic_integer.cpp94
1 files changed, 58 insertions, 36 deletions
diff --git a/src/video_core/shader/decode/arithmetic_integer.cpp b/src/video_core/shader/decode/arithmetic_integer.cpp
index 21366869d..83d3944ac 100644
--- a/src/video_core/shader/decode/arithmetic_integer.cpp
+++ b/src/video_core/shader/decode/arithmetic_integer.cpp
@@ -293,44 +293,66 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
void ShaderIR::WriteLop3Instruction(NodeBlock& bb, Register dest, Node op_a, Node op_b, Node op_c,
Node imm_lut, bool sets_cc) {
- constexpr u32 lop_iterations = 32;
- const Node one = Immediate(1);
- const Node two = Immediate(2);
-
- Node value;
- for (u32 i = 0; i < lop_iterations; ++i) {
- const Node shift_amount = Immediate(i);
-
- const Node a = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_c, shift_amount);
- const Node pack_0 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, one);
-
- const Node b = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_b, shift_amount);
- const Node c = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, b, one);
- const Node pack_1 = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, c, one);
-
- const Node d = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_a, shift_amount);
- const Node e = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, d, one);
- const Node pack_2 = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, e, two);
-
- const Node pack_01 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, pack_0, pack_1);
- const Node pack_012 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, pack_01, pack_2);
-
- const Node shifted_bit =
- Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, imm_lut, pack_012);
- const Node bit = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, shifted_bit, one);
-
- const Node right =
- Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, bit, shift_amount);
-
- if (i > 0) {
- value = Operation(OperationCode::IBitwiseOr, NO_PRECISE, value, right);
- } else {
- value = right;
+ const Node lop3_fast = [&](Node na, Node nb, Node nc, Node ttbl) {
+ Node value = Immediate(0);
+ ImmediateNode imm = std::get<ImmediateNode>(*ttbl);
+ if (imm.GetValue() & 0x01) {
+ Node a = Operation(OperationCode::IBitwiseNot, na);
+ Node b = Operation(OperationCode::IBitwiseNot, nb);
+ Node c = Operation(OperationCode::IBitwiseNot, nc);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, b);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, c);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
}
- }
+ if (imm.GetValue() & 0x02) {
+ Node a = Operation(OperationCode::IBitwiseNot, na);
+ Node b = Operation(OperationCode::IBitwiseNot, nb);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, b);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, nc);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x04) {
+ Node a = Operation(OperationCode::IBitwiseNot, na);
+ Node c = Operation(OperationCode::IBitwiseNot, nc);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, nb);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, c);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x08) {
+ Node a = Operation(OperationCode::IBitwiseNot, na);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, nb);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, nc);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x10) {
+ Node b = Operation(OperationCode::IBitwiseNot, nb);
+ Node c = Operation(OperationCode::IBitwiseNot, nc);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, na, b);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, c);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x20) {
+ Node b = Operation(OperationCode::IBitwiseNot, nb);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, na, b);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, nc);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x40) {
+ Node c = Operation(OperationCode::IBitwiseNot, nc);
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, na, nb);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, c);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ if (imm.GetValue() & 0x80) {
+ Node r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, na, nb);
+ r = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, r, nc);
+ value = Operation(OperationCode::IBitwiseOr, value, r);
+ }
+ return value;
+ }(op_a, op_b, op_c, imm_lut);
- SetInternalFlagsFromInteger(bb, value, sets_cc);
- SetRegister(bb, dest, value);
+ SetInternalFlagsFromInteger(bb, lop3_fast, sets_cc);
+ SetRegister(bb, dest, lop3_fast);
}
} // namespace VideoCommon::Shader