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Shader jit: Save and restore LOOPCOUNT_REG for nested loops,

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also add the assert back for nested loops
update test
This commit is contained in:
SachinVin 2022-05-14 17:08:38 +05:30
parent 047e238d09
commit 65611e5b51
2 changed files with 37 additions and 85 deletions
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12
src/video_core/shader/shader_jit_x64_compiler.cpp
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@ -164,8 +164,10 @@ static void LogCritical(const char* msg) {
void JitShader::Compile_Assert(bool condition, const char* msg) {
if (!condition) {
ABI_PushRegistersAndAdjustStack(*this, PersistentCallerSavedRegs(), 0);
mov(ABI_PARAM1, reinterpret_cast<std::size_t>(msg));
CallFarFunction(*this, LogCritical);
ABI_PopRegistersAndAdjustStack(*this, PersistentCallerSavedRegs(), 0);
}
}
@ -725,10 +727,10 @@ void JitShader::Compile_IF(Instruction instr) {
void JitShader::Compile_LOOP(Instruction instr) {
Compile_Assert(instr.flow_control.dest_offset >= program_counter,
"Backwards loops not supported");
Compile_Assert(loop_depth < 1, "Nested loops may not be supported");
if (loop_depth++) {
// LOOPCOUNT_REG is a "global", so we don't save it here.
push(LOOPINC.cvt64());
push(LOOPCOUNT.cvt64());
const auto loop_save_regs = BuildRegSet({LOOPCOUNT_REG, LOOPINC, LOOPCOUNT});
ABI_PushRegistersAndAdjustStack(*this, loop_save_regs, 0);
}
// This decodes the fields from the integer uniform at index instr.flow_control.int_uniform_id.
@ -759,8 +761,8 @@ void JitShader::Compile_LOOP(Instruction instr) {
loop_break_labels.pop_back();
if (--loop_depth) {
pop(LOOPCOUNT.cvt64());
pop(LOOPINC.cvt64());
const auto loop_save_regs = BuildRegSet({LOOPCOUNT_REG, LOOPINC, LOOPCOUNT});
ABI_PopRegistersAndAdjustStack(*this, loop_save_regs, 0);
}
}