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[GPU] Offset and clamp tessellation patch index (#2008, thanks @deaklajos)

This commit is contained in:
Triang3l 2022-04-14 13:04:34 +03:00
parent fea430f1f9
commit 38aca269e1
2 changed files with 47 additions and 28 deletions
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68
src/xenia/gpu/dxbc_shader_translator.cc
View File

@ -273,6 +273,36 @@ void DxbcShaderTranslator::ConvertPWLGamma(
accumulator_src);
}
void DxbcShaderTranslator::RemapAndConvertVertexIndices(
uint32_t dest_temp, uint32_t dest_temp_components, const dxbc::Src& src) {
dxbc::Dest dest(dxbc::Dest::R(dest_temp, dest_temp_components));
dxbc::Src dest_src(dxbc::Src::R(dest_temp));
// Add the base vertex index.
a_.OpIAdd(dest, src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexOffset,
offsetof(SystemConstants, vertex_index_offset),
dxbc::Src::kXXXX));
// Mask since the GPU only uses the lower 24 bits of the vertex index (tested
// on an Adreno 200 phone). `((index & 0xFFFFFF) + offset) & 0xFFFFFF` is the
// same as `(index + offset) & 0xFFFFFF`.
a_.OpAnd(dest, dest_src, dxbc::Src::LU(xenos::kVertexIndexMask));
// Clamp after offsetting.
a_.OpUMax(dest, dest_src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexMinMax,
offsetof(SystemConstants, vertex_index_min),
dxbc::Src::kXXXX));
a_.OpUMin(dest, dest_src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexMinMax,
offsetof(SystemConstants, vertex_index_max),
dxbc::Src::kXXXX));
// Convert to float.
a_.OpUToF(dest, dest_src);
}
void DxbcShaderTranslator::StartVertexShader_LoadVertexIndex() {
if (register_count() < 1) {
return;
@ -348,29 +378,9 @@ void DxbcShaderTranslator::StartVertexShader_LoadVertexIndex() {
}
}
// Add the base vertex index.
a_.OpIAdd(index_dest, index_src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexOffset,
offsetof(SystemConstants, vertex_index_offset),
dxbc::Src::kXXXX));
// Mask since the GPU only uses the lower 24 bits of the vertex index (tested
// on an Adreno 200 phone). `((index & 0xFFFFFF) + offset) & 0xFFFFFF` is the
// same as `(index + offset) & 0xFFFFFF`.
a_.OpAnd(index_dest, index_src, dxbc::Src::LU(xenos::kVertexIndexMask));
// Clamp the vertex index after offsetting.
a_.OpUMax(index_dest, index_src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexMinMax,
offsetof(SystemConstants, vertex_index_min),
dxbc::Src::kXXXX));
a_.OpUMin(index_dest, index_src,
LoadSystemConstant(SystemConstants::Index::kVertexIndexMinMax,
offsetof(SystemConstants, vertex_index_max),
dxbc::Src::kXXXX));
// Convert to float.
a_.OpUToF(index_dest, index_src);
// Remap the index to the needed range and convert it to floating-point.
RemapAndConvertVertexIndices(index_dest.index_1d_.index_,
index_dest.write_mask_, index_src);
if (uses_register_dynamic_addressing) {
// Store to indexed GPR 0 in x0[0].
@ -435,12 +445,12 @@ void DxbcShaderTranslator::StartVertexOrDomainShader() {
: dxbc::Dest::R(0, 0b0111),
dxbc::Src::VDomain(0b000110));
if (register_count() >= 2) {
// Copy the primitive index to r1.x as a float.
// Remap and write the primitive index to r1.x as floating-point.
uint32_t primitive_id_temp =
uses_register_dynamic_addressing ? PushSystemTemp() : 1;
in_primitive_id_used_ = true;
a_.OpUToF(dxbc::Dest::R(primitive_id_temp, 0b0001),
dxbc::Src::VPrim());
RemapAndConvertVertexIndices(primitive_id_temp, 0b0001,
dxbc::Src::VPrim());
if (uses_register_dynamic_addressing) {
a_.OpMov(dxbc::Dest::X(0, 1, 0b0001),
dxbc::Src::R(primitive_id_temp, dxbc::Src::kXXXX));
@ -518,11 +528,13 @@ void DxbcShaderTranslator::StartVertexOrDomainShader() {
a_.OpMov(uses_register_dynamic_addressing ? dxbc::Dest::X(0, 0, 0b0110)
: dxbc::Dest::R(0, 0b0110),
dxbc::Src::VDomain(0b010000));
// Copy the primitive index to r0.x as a float.
// Remap and write the primitive index to r0.x as floating-point.
// 4D5307F1 ground quad patches use the primitive index offset.
uint32_t primitive_id_temp =
uses_register_dynamic_addressing ? PushSystemTemp() : 0;
in_primitive_id_used_ = true;
a_.OpUToF(dxbc::Dest::R(primitive_id_temp, 0b0001), dxbc::Src::VPrim());
RemapAndConvertVertexIndices(primitive_id_temp, 0b0001,
dxbc::Src::VPrim());
if (uses_register_dynamic_addressing) {
a_.OpMov(dxbc::Dest::X(0, 0, 0b0001),
dxbc::Src::R(primitive_id_temp, dxbc::Src::kXXXX));

7
src/xenia/gpu/dxbc_shader_translator.h
View File

@ -756,6 +756,13 @@ class DxbcShaderTranslator : public ShaderTranslator {
uint32_t factor_component);
// Writing the prologue.
// Applies the offset to vertex or tessellation patch indices in the source
// components, restricts them to the minimum and the maximum index values, and
// converts them to floating-point. The destination may be the same as the
// source.
void RemapAndConvertVertexIndices(uint32_t dest_temp,
uint32_t dest_temp_components,
const dxbc::Src& src);
void StartVertexShader_LoadVertexIndex();
void StartVertexOrDomainShader();
void StartDomainShader();