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Implement PICA200 compliant arm64 MUL

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Adds `emitSafeMUL` to implement a PICA200 compliant multiplication that
handles the special `0 * inf = 0` case.
This commit is contained in:
Wunkolo 2024-03-14 12:16:57 -07:00
parent e13fe49bbb
commit 2b34ef4a89
2 changed files with 46 additions and 11 deletions
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7
include/PICA/dynapica/shader_rec_emitter_arm64.hpp
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@ -42,6 +42,9 @@ class ShaderEmitter : private oaknut::CodeBlock, public oaknut::CodeGenerator {
oaknut::Label emitLog2Func();
oaknut::Label emitExp2Func();
// Emit a PICA200-compliant multiplication that handles "0 * inf = 0"
void emitSafeMUL(oaknut::QReg src1, oaknut::QReg src2, oaknut::QReg scratch0);
template <typename T>
T getLabelPointer(const oaknut::Label& label) {
auto pointer = reinterpret_cast<u8*>(oaknut::CodeBlock::ptr()) + label.offset();
@ -123,9 +126,7 @@ class ShaderEmitter : private oaknut::CodeBlock, public oaknut::CodeGenerator {
ShaderEmitter() : oaknut::CodeBlock(allocSize), oaknut::CodeGenerator(oaknut::CodeBlock::ptr()) {}
// PC must be a valid entrypoint here. It doesn't have that much overhead in this case, so we use std::array<>::at() to assert it does
InstructionCallback getInstructionCallback(u32 pc) {
return getLabelPointer<InstructionCallback>(instructionLabels.at(pc));
}
InstructionCallback getInstructionCallback(u32 pc) { return getLabelPointer<InstructionCallback>(instructionLabels.at(pc)); }
PrologueCallback getPrologueCallback() { return prologueCb; }
void compile(const PICAShader& shaderUnit);