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[GPU] Use uint4 for loop/bool constants to meet std140 packing requirements.

This commit is contained in:
gibbed 2018-05-28 18:19:22 -05:00
parent 2bd9bae0f4
commit 83a9cb3435
1 changed files with 20 additions and 9 deletions
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29
src/xenia/gpu/spirv_shader_translator.cc
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@ -118,16 +118,18 @@ void SpirvShaderTranslator::StartTranslation() {
// Uniform constants.
Id float_consts_type =
b.makeArrayType(vec4_float_type_, b.makeUintConstant(512), 1);
Id loop_consts_type = b.makeArrayType(uint_type_, b.makeUintConstant(32), 1);
Id bool_consts_type = b.makeArrayType(uint_type_, b.makeUintConstant(8), 1);
Id loop_consts_type =
b.makeArrayType(vec4_uint_type_, b.makeUintConstant(8), 1);
Id bool_consts_type =
b.makeArrayType(vec4_uint_type_, b.makeUintConstant(2), 1);
// Strides
b.addDecoration(float_consts_type, spv::Decoration::DecorationArrayStride,
4 * sizeof(float));
b.addDecoration(loop_consts_type, spv::Decoration::DecorationArrayStride,
sizeof(uint32_t));
4 * sizeof(uint32_t));
b.addDecoration(bool_consts_type, spv::Decoration::DecorationArrayStride,
sizeof(uint32_t));
4 * sizeof(uint32_t));
Id consts_struct_type = b.makeStructType(
{float_consts_type, loop_consts_type, bool_consts_type}, "consts_type");
@ -824,9 +826,11 @@ void SpirvShaderTranslator::ProcessExecInstructionBegin(
// Based off of bool_consts
std::vector<Id> offsets;
offsets.push_back(b.makeUintConstant(2)); // bool_consts
offsets.push_back(b.makeUintConstant(instr.bool_constant_index / 32));
uint32_t bitfield_index = instr.bool_constant_index / 32;
offsets.push_back(b.makeUintConstant(bitfield_index / 4));
auto v = b.createAccessChain(spv::StorageClass::StorageClassUniform,
consts_, offsets);
v = b.createCompositeExtract(v, vec4_uint_type_, bitfield_index % 4);
v = b.createLoad(v);
// Bitfield extract the bool constant.
@ -836,6 +840,7 @@ void SpirvShaderTranslator::ProcessExecInstructionBegin(
b.makeUintConstant(instr.bool_constant_index % 32),
b.makeUintConstant(1));
// Conditional branch
auto cond = b.createBinOp(spv::Op::OpIEqual, bool_type_, v,
b.makeUintConstant(instr.condition ? 1 : 0));
*/
@ -923,9 +928,11 @@ void SpirvShaderTranslator::ProcessLoopStartInstruction(
std::vector<Id> offsets;
offsets.push_back(b.makeUintConstant(1)); // loop_consts
offsets.push_back(b.makeUintConstant(instr.loop_constant_index));
offsets.push_back(b.makeUintConstant(instr.loop_constant_index / 4));
auto loop_const = b.createAccessChain(spv::StorageClass::StorageClassUniform,
consts_, offsets);
loop_const = b.createCompositeExtract(loop_const, vec4_uint_type_,
instr.loop_constant_index % 4);
loop_const = b.createLoad(loop_const);
// uint loop_count_value = loop_const & 0xFF;
@ -1029,9 +1036,11 @@ void SpirvShaderTranslator::ProcessLoopEndInstruction(
std::vector<Id> offsets;
offsets.push_back(b.makeUintConstant(1)); // loop_consts
offsets.push_back(b.makeUintConstant(instr.loop_constant_index));
offsets.push_back(b.makeUintConstant(instr.loop_constant_index / 4));
auto loop_const = b.createAccessChain(spv::StorageClass::StorageClassUniform,
consts_, offsets);
loop_const = b.createCompositeExtract(loop_const, vec4_uint_type_,
instr.loop_constant_index % 4);
loop_const = b.createLoad(loop_const);
// uint loop_aL_value = (loop_const >> 16) & 0xFF;
@ -1101,14 +1110,16 @@ void SpirvShaderTranslator::ProcessJumpInstruction(
// Based off of bool_consts
std::vector<Id> offsets;
offsets.push_back(b.makeUintConstant(2)); // bool_consts
offsets.push_back(b.makeUintConstant(instr.bool_constant_index / 32));
uint32_t bitfield_index = instr.bool_constant_index / 32;
offsets.push_back(b.makeUintConstant(bitfield_index / 4));
auto v = b.createAccessChain(spv::StorageClass::StorageClassUniform,
consts_, offsets);
v = b.createCompositeExtract(v, vec4_uint_type_, bitfield_index % 4);
v = b.createLoad(v);
// Bitfield extract the bool constant.
// FIXME: NVidia's compiler seems to be broken on this instruction?
/*
// Bitfield extract the bool constant.
v = b.createTriOp(spv::Op::OpBitFieldUExtract, uint_type_, v,
b.makeUintConstant(instr.bool_constant_index % 32),
b.makeUintConstant(1));