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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "shader_recompiler/backend/spirv/emit_spirv_instructions.h"
#include "shader_recompiler/backend/spirv/spirv_emit_context.h"
namespace Shader::Backend::SPIRV {
namespace {
void SetZeroFlag(EmitContext& ctx, IR::Inst* inst, Id result) {
IR::Inst* const zero{inst->GetAssociatedPseudoOperation(IR::Opcode::GetZeroFromOp)};
if (!zero) {
return;
}
zero->SetDefinition(ctx.OpIEqual(ctx.U1, result, ctx.u32_zero_value));
zero->Invalidate();
}
void SetSignFlag(EmitContext& ctx, IR::Inst* inst, Id result) {
IR::Inst* const sign{inst->GetAssociatedPseudoOperation(IR::Opcode::GetSignFromOp)};
if (!sign) {
return;
}
sign->SetDefinition(ctx.OpSLessThan(ctx.U1, result, ctx.u32_zero_value));
sign->Invalidate();
}
} // Anonymous namespace
Id EmitIAdd32(EmitContext& ctx, IR::Inst* inst, Id a, Id b) {
Id result{};
if (IR::Inst* const carry{inst->GetAssociatedPseudoOperation(IR::Opcode::GetCarryFromOp)}) {
const Id carry_type{ctx.TypeStruct(ctx.U32[1], ctx.U32[1])};
const Id carry_result{ctx.OpIAddCarry(carry_type, a, b)};
result = ctx.OpCompositeExtract(ctx.U32[1], carry_result, 0U);
const Id carry_value{ctx.OpCompositeExtract(ctx.U32[1], carry_result, 1U)};
carry->SetDefinition(ctx.OpINotEqual(ctx.U1, carry_value, ctx.u32_zero_value));
carry->Invalidate();
} else {
result = ctx.OpIAdd(ctx.U32[1], a, b);
}
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
if (IR::Inst * overflow{inst->GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp)}) {
// https://stackoverflow.com/questions/55468823/how-to-detect-integer-overflow-in-c
constexpr u32 s32_max{static_cast<u32>(std::numeric_limits<s32>::max())};
const Id is_positive{ctx.OpSGreaterThanEqual(ctx.U1, a, ctx.u32_zero_value)};
const Id sub_a{ctx.OpISub(ctx.U32[1], ctx.Const(s32_max), a)};
const Id positive_test{ctx.OpSGreaterThan(ctx.U1, b, sub_a)};
const Id negative_test{ctx.OpSLessThan(ctx.U1, b, sub_a)};
const Id carry_flag{ctx.OpSelect(ctx.U1, is_positive, positive_test, negative_test)};
overflow->SetDefinition(carry_flag);
overflow->Invalidate();
}
return result;
}
Id EmitIAdd64(EmitContext& ctx, Id a, Id b) {
return ctx.OpIAdd(ctx.U64, a, b);
}
Id EmitISub32(EmitContext& ctx, Id a, Id b) {
return ctx.OpISub(ctx.U32[1], a, b);
}
Id EmitISub64(EmitContext& ctx, Id a, Id b) {
return ctx.OpISub(ctx.U64, a, b);
}
Id EmitIMul32(EmitContext& ctx, Id a, Id b) {
return ctx.OpIMul(ctx.U32[1], a, b);
}
Id EmitSDiv32(EmitContext& ctx, Id a, Id b) {
return ctx.OpSDiv(ctx.U32[1], a, b);
}
Id EmitUDiv32(EmitContext& ctx, Id a, Id b) {
return ctx.OpUDiv(ctx.U32[1], a, b);
}
Id EmitINeg32(EmitContext& ctx, Id value) {
return ctx.OpSNegate(ctx.U32[1], value);
}
Id EmitINeg64(EmitContext& ctx, Id value) {
return ctx.OpSNegate(ctx.U64, value);
}
Id EmitIAbs32(EmitContext& ctx, Id value) {
return ctx.OpSAbs(ctx.U32[1], value);
}
Id EmitShiftLeftLogical32(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftLeftLogical(ctx.U32[1], base, shift);
}
Id EmitShiftLeftLogical64(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftLeftLogical(ctx.U64, base, shift);
}
Id EmitShiftRightLogical32(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftRightLogical(ctx.U32[1], base, shift);
}
Id EmitShiftRightLogical64(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftRightLogical(ctx.U64, base, shift);
}
Id EmitShiftRightArithmetic32(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftRightArithmetic(ctx.U32[1], base, shift);
}
Id EmitShiftRightArithmetic64(EmitContext& ctx, Id base, Id shift) {
return ctx.OpShiftRightArithmetic(ctx.U64, base, shift);
}
Id EmitBitwiseAnd32(EmitContext& ctx, IR::Inst* inst, Id a, Id b) {
const Id result{ctx.OpBitwiseAnd(ctx.U32[1], a, b)};
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitBitwiseOr32(EmitContext& ctx, IR::Inst* inst, Id a, Id b) {
const Id result{ctx.OpBitwiseOr(ctx.U32[1], a, b)};
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitBitwiseXor32(EmitContext& ctx, IR::Inst* inst, Id a, Id b) {
const Id result{ctx.OpBitwiseXor(ctx.U32[1], a, b)};
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitBitFieldInsert(EmitContext& ctx, Id base, Id insert, Id offset, Id count) {
return ctx.OpBitFieldInsert(ctx.U32[1], base, insert, offset, count);
}
Id EmitBitFieldSExtract(EmitContext& ctx, IR::Inst* inst, Id base, Id offset, Id count) {
const Id result{ctx.OpBitFieldSExtract(ctx.U32[1], base, offset, count)};
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitBitFieldUExtract(EmitContext& ctx, IR::Inst* inst, Id base, Id offset, Id count) {
const Id result{ctx.OpBitFieldUExtract(ctx.U32[1], base, offset, count)};
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitBitReverse32(EmitContext& ctx, Id value) {
return ctx.OpBitReverse(ctx.U32[1], value);
}
Id EmitBitCount32(EmitContext& ctx, Id value) {
return ctx.OpBitCount(ctx.U32[1], value);
}
Id EmitBitwiseNot32(EmitContext& ctx, Id value) {
return ctx.OpNot(ctx.U32[1], value);
}
Id EmitFindSMsb32(EmitContext& ctx, Id value) {
return ctx.OpFindSMsb(ctx.U32[1], value);
}
Id EmitFindUMsb32(EmitContext& ctx, Id value) {
return ctx.OpFindUMsb(ctx.U32[1], value);
}
Id EmitSMin32(EmitContext& ctx, Id a, Id b) {
const bool is_broken{ctx.profile.has_broken_signed_operations};
if (is_broken) {
a = ctx.OpBitcast(ctx.S32[1], a);
b = ctx.OpBitcast(ctx.S32[1], b);
}
const Id result{ctx.OpSMin(ctx.U32[1], a, b)};
return is_broken ? ctx.OpBitcast(ctx.U32[1], result) : result;
}
Id EmitUMin32(EmitContext& ctx, Id a, Id b) {
return ctx.OpUMin(ctx.U32[1], a, b);
}
Id EmitSMax32(EmitContext& ctx, Id a, Id b) {
const bool is_broken{ctx.profile.has_broken_signed_operations};
if (is_broken) {
a = ctx.OpBitcast(ctx.S32[1], a);
b = ctx.OpBitcast(ctx.S32[1], b);
}
const Id result{ctx.OpSMax(ctx.U32[1], a, b)};
return is_broken ? ctx.OpBitcast(ctx.U32[1], result) : result;
}
Id EmitUMax32(EmitContext& ctx, Id a, Id b) {
return ctx.OpUMax(ctx.U32[1], a, b);
}
Id EmitSClamp32(EmitContext& ctx, IR::Inst* inst, Id value, Id min, Id max) {
Id result{};
if (ctx.profile.has_broken_signed_operations || ctx.profile.has_broken_spirv_clamp) {
value = ctx.OpBitcast(ctx.S32[1], value);
min = ctx.OpBitcast(ctx.S32[1], min);
max = ctx.OpBitcast(ctx.S32[1], max);
if (ctx.profile.has_broken_spirv_clamp) {
result = ctx.OpSMax(ctx.S32[1], ctx.OpSMin(ctx.S32[1], value, max), min);
} else {
result = ctx.OpSClamp(ctx.S32[1], value, min, max);
}
result = ctx.OpBitcast(ctx.U32[1], result);
} else {
result = ctx.OpSClamp(ctx.U32[1], value, min, max);
}
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitUClamp32(EmitContext& ctx, IR::Inst* inst, Id value, Id min, Id max) {
Id result{};
if (ctx.profile.has_broken_spirv_clamp) {
result = ctx.OpUMax(ctx.U32[1], ctx.OpUMin(ctx.U32[1], value, max), min);
} else {
result = ctx.OpUClamp(ctx.U32[1], value, min, max);
}
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
return result;
}
Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSLessThan(ctx.U1, lhs, rhs);
}
Id EmitULessThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpULessThan(ctx.U1, lhs, rhs);
}
Id EmitIEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpIEqual(ctx.U1, lhs, rhs);
}
Id EmitSLessThanEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSLessThanEqual(ctx.U1, lhs, rhs);
}
Id EmitULessThanEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpULessThanEqual(ctx.U1, lhs, rhs);
}
Id EmitSGreaterThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSGreaterThan(ctx.U1, lhs, rhs);
}
Id EmitUGreaterThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpUGreaterThan(ctx.U1, lhs, rhs);
}
Id EmitINotEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpINotEqual(ctx.U1, lhs, rhs);
}
Id EmitSGreaterThanEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSGreaterThanEqual(ctx.U1, lhs, rhs);
}
Id EmitUGreaterThanEqual(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpUGreaterThanEqual(ctx.U1, lhs, rhs);
}
} // namespace Shader::Backend::SPIRV
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