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[DXBC] Fix and cleanup depth-only PS register usage

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Triang3l
2020-06-07 15:21:31 +03:00
parent 2cd69092ce
commit 9f789e01b6
3 changed files with 55 additions and 40 deletions
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49
src/xenia/gpu/dxbc_shader_translator_om.cc
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@@ -581,23 +581,28 @@ void DxbcShaderTranslator::ROV_DepthStencilTest() {
// Perform depth/stencil test for the sample, get the result in bits 4
// (passed) and 8 (new depth/stencil buffer value is different).
DxbcOpCall(DxbcSrc::Label(label_rov_depth_stencil_sample_));
// Write the resulting depth/stencil value in system_temps_subroutine_[0].x
// to the sample's depth in system_temp_rov_depth_stencil_.
DxbcOpMov(DxbcDest::R(system_temp_rov_depth_stencil_, 1 << i),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kXXXX));
if (i) {
// Shift the result bits to the correct position.
DxbcOpIShL(DxbcDest::R(system_temps_subroutine_, 0b0010),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kYYYY),
DxbcSrc::LU(i));
if (ROV_IsDepthStencilEarly()) {
// Write the resulting depth/stencil value in
// system_temps_subroutine_[0].x to the sample's depth in
// system_temp_rov_depth_stencil_.
DxbcOpMov(DxbcDest::R(system_temp_rov_depth_stencil_, 1 << i),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kXXXX));
}
if (!is_depth_only_pixel_shader_) {
if (i) {
// Shift the result bits to the correct position.
DxbcOpIShL(DxbcDest::R(system_temps_subroutine_, 0b0010),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kYYYY),
DxbcSrc::LU(i));
}
// Add the result in system_temps_subroutine_[0].y to
// system_temp_rov_params_.x. Bits 0:3 will be cleared in case of test
// failure (only doing this for covered samples), bits 4:7 will be added
// if need to defer writing.
DxbcOpXOr(DxbcDest::R(system_temp_rov_params_, 0b0001),
DxbcSrc::R(system_temp_rov_params_, DxbcSrc::kXXXX),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kYYYY));
}
// Add the result in system_temps_subroutine_[0].y to
// system_temp_rov_params_.x. Bits 0:3 will be cleared in case of test
// failure (only doing this for covered samples), bits 4:7 will be added if
// need to defer writing.
DxbcOpXOr(DxbcDest::R(system_temp_rov_params_, 0b0001),
DxbcSrc::R(system_temp_rov_params_, DxbcSrc::kXXXX),
DxbcSrc::R(system_temps_subroutine_, DxbcSrc::kYYYY));
// Close the sample conditional.
DxbcOpEndIf();
@@ -1595,11 +1600,13 @@ void DxbcShaderTranslator::CompletePixelShader_WriteToROV() {
ROV_DepthStencilTest();
}
// Check if any sample is still covered after depth testing and writing, skip
// color writing completely in this case.
DxbcOpAnd(temp_x_dest, DxbcSrc::R(system_temp_rov_params_, DxbcSrc::kXXXX),
DxbcSrc::LU(0b1111));
DxbcOpRetC(false, temp_x_src);
if (!is_depth_only_pixel_shader_) {
// Check if any sample is still covered after depth testing and writing,
// skip color writing completely in this case.
DxbcOpAnd(temp_x_dest, DxbcSrc::R(system_temp_rov_params_, DxbcSrc::kXXXX),
DxbcSrc::LU(0b1111));
DxbcOpRetC(false, temp_x_src);
}
// Write color values.
for (uint32_t i = 0; i < 4; ++i) {