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shader: Implement SHR

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This commit is contained in:
ameerj 2021-02-25 00:46:40 -05:00
parent 8810c88b7e
commit cc55d28949
8 changed files with 80 additions and 18 deletions
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1
src/shader_recompiler/CMakeLists.txt
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@ -72,6 +72,7 @@ add_library(shader_recompiler STATIC
frontend/maxwell/translate/impl/integer_scaled_add.cpp
frontend/maxwell/translate/impl/integer_set_predicate.cpp
frontend/maxwell/translate/impl/integer_shift_left.cpp
frontend/maxwell/translate/impl/integer_shift_right.cpp
frontend/maxwell/translate/impl/integer_short_multiply_add.cpp
frontend/maxwell/translate/impl/load_store_attribute.cpp
frontend/maxwell/translate/impl/load_store_memory.cpp

5
src/shader_recompiler/backend/spirv/emit_spirv.h
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@ -219,14 +219,15 @@ Id EmitIMul32(EmitContext& ctx, Id a, Id b);
Id EmitINeg32(EmitContext& ctx, Id value);
Id EmitIAbs32(EmitContext& ctx, Id value);
Id EmitShiftLeftLogical32(EmitContext& ctx, Id base, Id shift);
void EmitShiftRightLogical32(EmitContext& ctx);
void EmitShiftRightArithmetic32(EmitContext& ctx);
Id EmitShiftRightLogical32(EmitContext& ctx, Id a, Id b);
Id EmitShiftRightArithmetic32(EmitContext& ctx, Id a, Id b);
Id EmitBitwiseAnd32(EmitContext& ctx, Id a, Id b);
Id EmitBitwiseOr32(EmitContext& ctx, Id a, Id b);
Id EmitBitwiseXor32(EmitContext& ctx, Id a, Id b);
Id EmitBitFieldInsert(EmitContext& ctx, Id base, Id insert, Id offset, Id count);
Id EmitBitFieldSExtract(EmitContext& ctx, Id base, Id offset, Id count);
Id EmitBitFieldUExtract(EmitContext& ctx, Id base, Id offset, Id count);
Id EmitBitReverse32(EmitContext& ctx, Id value);
Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs);
Id EmitULessThan(EmitContext& ctx, Id lhs, Id rhs);
Id EmitIEqual(EmitContext& ctx, Id lhs, Id rhs);

12
src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp
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@ -70,12 +70,12 @@ Id EmitShiftLeftLogical32(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftLeftLogical(ctx.U32[1], base, shift);
}
void EmitShiftRightLogical32(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
Id EmitShiftRightLogical32(EmitContext& ctx, Id a, Id b) {
return ctx.OpShiftRightLogical(ctx.U32[1], a, b);
}
void EmitShiftRightArithmetic32(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
Id EmitShiftRightArithmetic32(EmitContext& ctx, Id a, Id b) {
return ctx.OpShiftRightArithmetic(ctx.U32[1], a, b);
}
Id EmitBitwiseAnd32(EmitContext& ctx, Id a, Id b) {
@ -102,6 +102,10 @@ Id EmitBitFieldUExtract(EmitContext& ctx, Id base, Id offset, Id count) {
return ctx.OpBitFieldUExtract(ctx.U32[1], base, offset, count);
}
Id EmitBitReverse32(EmitContext& ctx, Id value) {
return ctx.OpBitReverse(ctx.U32[1], value);
}
Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSLessThan(ctx.U1, lhs, rhs);
}

4
src/shader_recompiler/frontend/ir/ir_emitter.cpp
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@ -804,6 +804,10 @@ U32 IREmitter::BitFieldExtract(const U32& base, const U32& offset, const U32& co
count);
}
U32 IREmitter::BitReverse(const U32& value) {
return Inst<U32>(Opcode::BitReverse32, value);
}
U1 IREmitter::ILessThan(const U32& lhs, const U32& rhs, bool is_signed) {
return Inst<U1>(is_signed ? Opcode::SLessThan : Opcode::ULessThan, lhs, rhs);
}

1
src/shader_recompiler/frontend/ir/ir_emitter.h
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@ -159,6 +159,7 @@ public:
const U32& count);
[[nodiscard]] U32 BitFieldExtract(const U32& base, const U32& offset, const U32& count,
bool is_signed);
[[nodiscard]] U32 BitReverse(const U32& value);
[[nodiscard]] U1 ILessThan(const U32& lhs, const U32& rhs, bool is_signed);
[[nodiscard]] U1 IEqual(const U32& lhs, const U32& rhs);

1
src/shader_recompiler/frontend/ir/opcodes.inc
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@ -231,6 +231,7 @@ OPCODE(BitwiseXor32, U32, U32,
OPCODE(BitFieldInsert, U32, U32, U32, U32, U32, )
OPCODE(BitFieldSExtract, U32, U32, U32, U32, )
OPCODE(BitFieldUExtract, U32, U32, U32, U32, )
OPCODE(BitReverse32, U32, U32, )
OPCODE(SLessThan, U1, U32, U32, )
OPCODE(ULessThan, U1, U32, U32, )

62
src/shader_recompiler/frontend/maxwell/translate/impl/integer_shift_right.cpp Normal file
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@ -0,0 +1,62 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/bit_field.h"
#include "common/common_types.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {
namespace {
void SHR(TranslatorVisitor& v, u64 insn, const IR::U32& shift) {
union {
u64 insn;
BitField<0, 8, IR::Reg> dest_reg;
BitField<8, 8, IR::Reg> src_reg_a;
BitField<39, 1, u64> is_wrapped;
BitField<40, 1, u64> brev;
BitField<43, 1, u64> xmode;
BitField<48, 1, u64> is_arithmetic;
} const shr{insn};
if (shr.xmode != 0) {
throw NotImplementedException("SHR.XMODE");
}
IR::U32 base{v.X(shr.src_reg_a)};
if (shr.brev == 1) {
base = v.ir.BitReverse(base);
}
IR::U32 result;
const IR::U32 safe_shift = shr.is_wrapped == 0 ? shift : v.ir.BitwiseAnd(shift, v.ir.Imm32(31));
if (shr.is_arithmetic == 1) {
result = IR::U32{v.ir.ShiftRightArithmetic(base, safe_shift)};
} else {
result = IR::U32{v.ir.ShiftRightLogical(base, safe_shift)};
}
if (shr.is_wrapped == 0) {
const IR::U32 zero{v.ir.Imm32(0)};
const IR::U32 safe_bits{v.ir.Imm32(32)};
const IR::U1 is_negative{v.ir.ILessThan(result, zero, true)};
const IR::U1 is_safe{v.ir.ILessThan(shift, safe_bits, false)};
const IR::U32 clamped_value{v.ir.Select(is_negative, v.ir.Imm32(-1), zero)};
result = IR::U32{v.ir.Select(is_safe, result, clamped_value)};
}
v.X(shr.dest_reg, result);
}
} // Anonymous namespace
void TranslatorVisitor::SHR_reg(u64 insn) {
SHR(*this, insn, GetReg20(insn));
}
void TranslatorVisitor::SHR_cbuf(u64 insn) {
SHR(*this, insn, GetCbuf(insn));
}
void TranslatorVisitor::SHR_imm(u64 insn) {
SHR(*this, insn, GetImm20(insn));
}
} // namespace Shader::Maxwell

12
src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
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@ -757,18 +757,6 @@ void TranslatorVisitor::SHFL(u64) {
ThrowNotImplemented(Opcode::SHFL);
}
void TranslatorVisitor::SHR_reg(u64) {
ThrowNotImplemented(Opcode::SHR_reg);
}
void TranslatorVisitor::SHR_cbuf(u64) {
ThrowNotImplemented(Opcode::SHR_cbuf);
}
void TranslatorVisitor::SHR_imm(u64) {
ThrowNotImplemented(Opcode::SHR_imm);
}
void TranslatorVisitor::SSY() {
// SSY is a no-op
}