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[GPU] Remove register reinterpret_casts + WAIT_REG_MEM volatility

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Hopefully prevents some potential #1971-like situations.

WAIT_REG_MEM's implementation also allowed the compiler to load the value
only once, which caused an infinite loop with the other changes in the
commit (even in debug builds), so it's now accessed as volatile. Possibly
it would be even better to replace it with some (acquire/release?) atomic
load/store some day at least for the registers actually seen as
participating in those waits.

Also fixes the endianness being handled only on the first wait iteration in
WAIT_REG_MEM.
This commit is contained in:
Triang3l
2024-05-12 17:17:30 +03:00
parent f0ad4f4587
commit 376bad5056
19 changed files with 336 additions and 318 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/xenia/gpu/shader_interpreter.cc
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@@ -28,10 +28,7 @@ void ShaderInterpreter::Execute() {
state_.Reset();
const uint32_t* bool_constants =
&register_file_[XE_GPU_REG_SHADER_CONSTANT_BOOL_000_031].u32;
const xenos::LoopConstant* loop_constants =
reinterpret_cast<const xenos::LoopConstant*>(
&register_file_[XE_GPU_REG_SHADER_CONSTANT_LOOP_00].u32);
&register_file_[XE_GPU_REG_SHADER_CONSTANT_BOOL_000_031];
bool exec_ended = false;
uint32_t cf_index_next = 1;
@@ -140,8 +137,8 @@ void ShaderInterpreter::Execute() {
cf_index_next = cf_loop_start.address();
continue;
}
xenos::LoopConstant loop_constant =
loop_constants[cf_loop_start.loop_id()];
auto loop_constant = register_file_.Get<xenos::LoopConstant>(
XE_GPU_REG_SHADER_CONSTANT_LOOP_00 + cf_loop_start.loop_id());
state_.loop_constants[state_.loop_stack_depth] = loop_constant;
uint32_t& loop_iterator_ref =
state_.loop_iterators[state_.loop_stack_depth];
@@ -170,8 +167,11 @@ void ShaderInterpreter::Execute() {
&cf_instr);
xenos::LoopConstant loop_constant =
state_.loop_constants[state_.loop_stack_depth - 1];
assert_true(loop_constant.value ==
loop_constants[cf_loop_end.loop_id()].value);
assert_zero(
std::memcmp(&loop_constant,
&register_file_[XE_GPU_REG_SHADER_CONSTANT_LOOP_00 +
cf_loop_end.loop_id()],
sizeof(loop_constant)));
uint32_t loop_iterator =
++state_.loop_iterators[state_.loop_stack_depth - 1];
if (loop_iterator < loop_constant.count &&
@@ -257,28 +257,31 @@ void ShaderInterpreter::Execute() {
}
}
const float* ShaderInterpreter::GetFloatConstant(
const std::array<float, 4> ShaderInterpreter::GetFloatConstant(
uint32_t address, bool is_relative, bool relative_address_is_a0) const {
static const float zero[4] = {};
int32_t index = int32_t(address);
if (is_relative) {
index += relative_address_is_a0 ? state_.address_register
: state_.GetLoopAddress();
}
if (index < 0) {
return zero;
return std::array<float, 4>();
}
auto base_and_size_minus_1 = register_file_.Get<reg::SQ_VS_CONST>(
shader_type_ == xenos::ShaderType::kVertex ? XE_GPU_REG_SQ_VS_CONST
: XE_GPU_REG_SQ_PS_CONST);
if (uint32_t(index) > base_and_size_minus_1.size) {
return zero;
return std::array<float, 4>();
}
index += base_and_size_minus_1.base;
if (index >= 512) {
return zero;
return std::array<float, 4>();
}
return &register_file_[XE_GPU_REG_SHADER_CONSTANT_000_X + 4 * index].f32;
std::array<float, 4> value;
std::memcpy(value.data(),
&register_file_[XE_GPU_REG_SHADER_CONSTANT_000_X + 4 * index],
sizeof(float) * 4);
return value;
}
void ShaderInterpreter::ExecuteAluInstruction(ucode::AluInstruction instr) {
@@ -297,6 +300,7 @@ void ShaderInterpreter::ExecuteAluInstruction(ucode::AluInstruction instr) {
const float* vector_src_ptr;
uint32_t vector_src_register = instr.src_reg(1 + i);
bool vector_src_absolute = false;
std::array<float, 4> vector_src_float_constant;
if (instr.src_is_temp(1 + i)) {
vector_src_ptr = GetTempRegister(
ucode::AluInstruction::src_temp_reg(vector_src_register),
@@ -304,9 +308,10 @@ void ShaderInterpreter::ExecuteAluInstruction(ucode::AluInstruction instr) {
vector_src_absolute = ucode::AluInstruction::is_src_temp_value_absolute(
vector_src_register);
} else {
vector_src_ptr = GetFloatConstant(
vector_src_float_constant = GetFloatConstant(
vector_src_register, instr.src_const_is_addressed(1 + i),
instr.is_const_address_register_relative());
vector_src_ptr = vector_src_float_constant.data();
}
uint32_t vector_src_absolute_mask =
~(uint32_t(vector_src_absolute) << 31);
@@ -618,6 +623,7 @@ void ShaderInterpreter::ExecuteAluInstruction(ucode::AluInstruction instr) {
// r#/c#.w or r#/c#.wx.
const float* scalar_src_ptr;
uint32_t scalar_src_register = instr.src_reg(3);
std::array<float, 4> scalar_src_float_constant;
if (instr.src_is_temp(3)) {
scalar_src_ptr = GetTempRegister(
ucode::AluInstruction::src_temp_reg(scalar_src_register),
@@ -625,9 +631,10 @@ void ShaderInterpreter::ExecuteAluInstruction(ucode::AluInstruction instr) {
scalar_src_absolute = ucode::AluInstruction::is_src_temp_value_absolute(
scalar_src_register);
} else {
scalar_src_ptr = GetFloatConstant(
scalar_src_float_constant = GetFloatConstant(
scalar_src_register, instr.src_const_is_addressed(3),
instr.is_const_address_register_relative());
scalar_src_ptr = scalar_src_float_constant.data();
}
uint32_t scalar_src_swizzle = instr.src_swizzle(3);
scalar_operand_component_count =
@@ -984,10 +991,8 @@ void ShaderInterpreter::ExecuteVertexFetchInstruction(
state_.vfetch_full_last = instr;
}
xenos::xe_gpu_vertex_fetch_t fetch_constant =
*reinterpret_cast<const xenos::xe_gpu_vertex_fetch_t*>(
&register_file_[XE_GPU_REG_SHADER_CONSTANT_FETCH_00_0 +
state_.vfetch_full_last.fetch_constant_index()]);
xenos::xe_gpu_vertex_fetch_t fetch_constant = register_file_.GetVertexFetch(
state_.vfetch_full_last.fetch_constant_index());
if (!instr.is_mini_fetch()) {
// Get the part of the address that depends on vfetch_full data.