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shader_decode: Use BitfieldExtract instead of shift + and

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This commit is contained in:
ReinUsesLisp
2018-12-26 02:58:47 -03:00
parent 52223313b1
commit 2faad9bf23
8 changed files with 37 additions and 48 deletions
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26
src/video_core/shader/decode/xmad.cpp
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@ -47,22 +47,10 @@ u32 ShaderIR::DecodeXmad(BasicBlock& bb, u32 pc) {
return {false, Immediate(0), Immediate(0)};
}();
if (instr.xmad.high_a) {
op_a = SignedOperation(OperationCode::ILogicalShiftRight, is_signed_a, NO_PRECISE, op_a,
Immediate(16));
} else {
op_a = SignedOperation(OperationCode::IBitwiseAnd, is_signed_a, NO_PRECISE, op_a,
Immediate(0xffff));
}
op_a = BitfieldExtract(op_a, instr.xmad.high_a ? 16 : 0, 16);
const Node original_b = op_b;
if (instr.xmad.high_b) {
op_b = SignedOperation(OperationCode::ILogicalShiftRight, is_signed_b, NO_PRECISE, op_a,
Immediate(16));
} else {
op_b = SignedOperation(OperationCode::IBitwiseAnd, is_signed_b, NO_PRECISE, op_b,
Immediate(0xffff));
}
op_b = BitfieldExtract(op_b, instr.xmad.high_b ? 16 : 0, 16);
// TODO(Rodrigo): Use an appropiate sign for this operation
Node product = Operation(OperationCode::IMul, NO_PRECISE, op_a, op_b);
@ -75,11 +63,9 @@ u32 ShaderIR::DecodeXmad(BasicBlock& bb, u32 pc) {
case Tegra::Shader::XmadMode::None:
return op_c;
case Tegra::Shader::XmadMode::CLo:
return SignedOperation(OperationCode::IBitwiseAnd, is_signed_c, NO_PRECISE, op_c,
Immediate(0xffff));
return BitfieldExtract(op_c, 0, 16);
case Tegra::Shader::XmadMode::CHi:
return SignedOperation(OperationCode::ILogicalShiftRight, is_signed_c, NO_PRECISE, op_c,
Immediate(16));
return BitfieldExtract(op_c, 16, 16);
case Tegra::Shader::XmadMode::CBcc: {
const Node shifted_b = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_b,
NO_PRECISE, original_b, Immediate(16));
@ -94,9 +80,9 @@ u32 ShaderIR::DecodeXmad(BasicBlock& bb, u32 pc) {
// TODO(Rodrigo): Use an appropiate sign for this operation
Node sum = Operation(OperationCode::IAdd, product, op_c);
if (is_merge) {
const Node a = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, sum, Immediate(0xffff));
const Node a = BitfieldExtract(sum, 0, 16);
const Node b =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, original_b, Immediate(0xffff));
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, original_b, Immediate(16));
sum = Operation(OperationCode::IBitwiseOr, NO_PRECISE, a, b);
}