forked from suyu/suyu
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
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namespace Shader::Maxwell {
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namespace {
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enum class IntegerWidth : u64 {
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Byte,
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Short,
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Word,
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};
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[[nodiscard]] IR::U32 WidthSize(IR::IREmitter& ir, IntegerWidth width) {
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switch (width) {
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case IntegerWidth::Byte:
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return ir.Imm32(8);
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case IntegerWidth::Short:
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return ir.Imm32(16);
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case IntegerWidth::Word:
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return ir.Imm32(32);
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default:
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throw NotImplementedException("Invalid width {}", width);
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}
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}
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[[nodiscard]] IR::U32 ConvertInteger(IR::IREmitter& ir, const IR::U32& src,
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IntegerWidth dst_width) {
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const IR::U32 zero{ir.Imm32(0)};
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switch (dst_width) {
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case IntegerWidth::Byte:
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return ir.BitFieldExtract(src, zero, ir.Imm32(8), false);
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case IntegerWidth::Short:
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return ir.BitFieldExtract(src, zero, ir.Imm32(16), false);
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case IntegerWidth::Word:
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return ir.BitFieldExtract(src, zero, ir.Imm32(32), false);
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default:
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throw NotImplementedException("Invalid width {}", dst_width);
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}
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}
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void I2I(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
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union {
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u64 insn;
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BitField<0, 8, IR::Reg> dest_reg;
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BitField<8, 2, IntegerWidth> dst_fmt;
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BitField<12, 1, u64> dst_fmt_sign;
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BitField<10, 2, IntegerWidth> src_fmt;
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BitField<13, 1, u64> src_fmt_sign;
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BitField<41, 3, u64> selector;
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BitField<45, 1, u64> neg;
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BitField<49, 1, u64> abs;
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BitField<50, 1, u64> sat;
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} const i2i{insn};
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if (i2i.sat != 0) {
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throw NotImplementedException("I2I SAT");
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}
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if (i2i.src_fmt == IntegerWidth::Short && (i2i.selector == 1 || i2i.selector == 3)) {
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throw NotImplementedException("16-bit source format incompatible with selector {}",
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i2i.selector);
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}
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if (i2i.src_fmt == IntegerWidth::Word && i2i.selector != 0) {
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throw NotImplementedException("32-bit source format incompatible with selector {}",
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i2i.selector);
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}
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const s32 selector{static_cast<s32>(i2i.selector)};
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const IR::U32 offset{v.ir.Imm32(selector * 8)};
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const IR::U32 count{WidthSize(v.ir, i2i.src_fmt)};
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IR::U32 src_values{v.ir.BitFieldExtract(src_a, offset, count, i2i.src_fmt_sign != 0)};
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if (i2i.abs) {
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src_values = v.ir.IAbs(src_values);
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}
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if (i2i.neg) {
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src_values = v.ir.INeg(src_values);
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}
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const IR::U32 result{ConvertInteger(v.ir, src_values, i2i.dst_fmt)};
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v.X(i2i.dest_reg, result);
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}
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} // Anonymous namespace
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void TranslatorVisitor::I2I_reg(u64 insn) {
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I2I(*this, insn, GetReg20(insn));
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}
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void TranslatorVisitor::I2I_cbuf(u64 insn) {
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I2I(*this, insn, GetCbuf(insn));
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}
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void TranslatorVisitor::I2I_imm(u64 insn) {
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I2I(*this, insn, GetImm20(insn));
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}
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} // namespace Shader::Maxwell
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