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Merge pull request #3799 from ReinUsesLisp/iadd-cc

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shader: Implement P2R CC, IADD Rd.CC and IADD.X
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bunnei 2020-04-30 12:56:36 -04:00 committed by GitHub
commit c7b5a87c90
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 84 additions and 28 deletions
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2
externals/sirit vendored

@ -1 +1 @@
Subproject commit a712959f1e373a33b48042b5934e288a243d5954
Subproject commit 414fc4dbd28d8fe48f735a0c389db8a234f733c0

4
src/video_core/engines/shader_bytecode.h
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@ -813,6 +813,10 @@ union Instruction {
BitField<49, 1, u64> negate_a;
} alu_integer;
union {
BitField<43, 1, u64> x;
} iadd;
union {
BitField<39, 1, u64> ftz;
BitField<32, 1, u64> saturate;

10
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -1870,6 +1870,14 @@ private:
return GenerateBinaryInfix(operation, ">=", Type::Bool, type, type);
}
Expression LogicalAddCarry(Operation operation) {
const std::string carry = code.GenerateTemporary();
code.AddLine("uint {};", carry);
code.AddLine("uaddCarry({}, {}, {});", VisitOperand(operation, 0).AsUint(),
VisitOperand(operation, 1).AsUint(), carry);
return {fmt::format("({} != 0)", carry), Type::Bool};
}
Expression LogicalFIsNan(Operation operation) {
return GenerateUnary(operation, "isnan", Type::Bool, Type::Float);
}
@ -2441,6 +2449,8 @@ private:
&GLSLDecompiler::LogicalNotEqual<Type::Uint>,
&GLSLDecompiler::LogicalGreaterEqual<Type::Uint>,
&GLSLDecompiler::LogicalAddCarry,
&GLSLDecompiler::Logical2HLessThan<false>,
&GLSLDecompiler::Logical2HEqual<false>,
&GLSLDecompiler::Logical2HLessEqual<false>,

11
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
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@ -1584,6 +1584,15 @@ private:
return {OpCompositeConstruct(t_half, low, high), Type::HalfFloat};
}
Expression LogicalAddCarry(Operation operation) {
const Id op_a = AsUint(Visit(operation[0]));
const Id op_b = AsUint(Visit(operation[1]));
const Id result = OpIAddCarry(TypeStruct({t_uint, t_uint}), op_a, op_b);
const Id carry = OpCompositeExtract(t_uint, result, 1);
return {OpINotEqual(t_bool, carry, Constant(t_uint, 0)), Type::Bool};
}
Expression LogicalAssign(Operation operation) {
const Node& dest = operation[0];
const Node& src = operation[1];
@ -2518,6 +2527,8 @@ private:
&SPIRVDecompiler::Binary<&Module::OpINotEqual, Type::Bool, Type::Uint>,
&SPIRVDecompiler::Binary<&Module::OpUGreaterThanEqual, Type::Bool, Type::Uint>,
&SPIRVDecompiler::LogicalAddCarry,
&SPIRVDecompiler::Binary<&Module::OpFOrdLessThan, Type::Bool2, Type::HalfFloat>,
&SPIRVDecompiler::Binary<&Module::OpFOrdEqual, Type::Bool2, Type::HalfFloat>,
&SPIRVDecompiler::Binary<&Module::OpFOrdLessThanEqual, Type::Bool2, Type::HalfFloat>,

31
src/video_core/shader/decode/arithmetic_integer.cpp
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@ -35,15 +35,38 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
case OpCode::Id::IADD_C:
case OpCode::Id::IADD_R:
case OpCode::Id::IADD_IMM: {
UNIMPLEMENTED_IF_MSG(instr.alu.saturate_d, "IADD saturation not implemented");
UNIMPLEMENTED_IF_MSG(instr.alu.saturate_d, "IADD.SAT");
UNIMPLEMENTED_IF_MSG(instr.iadd.x && instr.generates_cc, "IADD.X Rd.CC");
op_a = GetOperandAbsNegInteger(op_a, false, instr.alu_integer.negate_a, true);
op_b = GetOperandAbsNegInteger(op_b, false, instr.alu_integer.negate_b, true);
const Node value = Operation(OperationCode::IAdd, PRECISE, op_a, op_b);
Node value = Operation(OperationCode::UAdd, op_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
if (instr.iadd.x) {
Node carry = GetInternalFlag(InternalFlag::Carry);
Node x = Operation(OperationCode::Select, std::move(carry), Immediate(1), Immediate(0));
value = Operation(OperationCode::UAdd, std::move(value), std::move(x));
}
if (instr.generates_cc) {
const Node i0 = Immediate(0);
Node zero = Operation(OperationCode::LogicalIEqual, value, i0);
Node sign = Operation(OperationCode::LogicalILessThan, value, i0);
Node carry = Operation(OperationCode::LogicalAddCarry, op_a, op_b);
Node pos_a = Operation(OperationCode::LogicalIGreaterThan, op_a, i0);
Node pos_b = Operation(OperationCode::LogicalIGreaterThan, op_b, i0);
Node pos = Operation(OperationCode::LogicalAnd, std::move(pos_a), std::move(pos_b));
Node overflow = Operation(OperationCode::LogicalAnd, pos, sign);
SetInternalFlag(bb, InternalFlag::Zero, std::move(zero));
SetInternalFlag(bb, InternalFlag::Sign, std::move(sign));
SetInternalFlag(bb, InternalFlag::Carry, std::move(carry));
SetInternalFlag(bb, InternalFlag::Overflow, std::move(overflow));
}
SetRegister(bb, instr.gpr0, std::move(value));
break;
}
case OpCode::Id::IADD3_C:

52
src/video_core/shader/decode/register_set_predicate.cpp
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@ -2,6 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <utility>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
@ -10,20 +12,20 @@
namespace VideoCommon::Shader {
using std::move;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
namespace {
constexpr u64 NUM_PROGRAMMABLE_PREDICATES = 7;
}
constexpr u64 NUM_CONDITION_CODES = 4;
constexpr u64 NUM_PREDICATES = 7;
} // namespace
u32 ShaderIR::DecodeRegisterSetPredicate(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.p2r_r2p.mode != Tegra::Shader::R2pMode::Pr);
const Node apply_mask = [&] {
Node apply_mask = [this, opcode, instr] {
switch (opcode->get().GetId()) {
case OpCode::Id::R2P_IMM:
case OpCode::Id::P2R_IMM:
@ -34,39 +36,43 @@ u32 ShaderIR::DecodeRegisterSetPredicate(NodeBlock& bb, u32 pc) {
}
}();
const auto offset = static_cast<u32>(instr.p2r_r2p.byte) * 8;
const u32 offset = static_cast<u32>(instr.p2r_r2p.byte) * 8;
const bool cc = instr.p2r_r2p.mode == Tegra::Shader::R2pMode::Cc;
const u64 num_entries = cc ? NUM_CONDITION_CODES : NUM_PREDICATES;
const auto get_entry = [this, cc](u64 entry) {
return cc ? GetInternalFlag(static_cast<InternalFlag>(entry)) : GetPredicate(entry);
};
switch (opcode->get().GetId()) {
case OpCode::Id::R2P_IMM: {
const Node mask = GetRegister(instr.gpr8);
Node mask = GetRegister(instr.gpr8);
for (u64 pred = 0; pred < NUM_PROGRAMMABLE_PREDICATES; ++pred) {
const auto shift = static_cast<u32>(pred);
for (u64 entry = 0; entry < num_entries; ++entry) {
const u32 shift = static_cast<u32>(entry);
const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
const Node condition =
Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
Node apply = BitfieldExtract(apply_mask, shift, 1);
Node condition = Operation(OperationCode::LogicalUNotEqual, apply, Immediate(0));
const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
const Node value =
Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
Node compare = BitfieldExtract(mask, offset + shift, 1);
Node value = Operation(OperationCode::LogicalUNotEqual, move(compare), Immediate(0));
const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
bb.push_back(Conditional(condition, {code}));
Node code = Operation(OperationCode::LogicalAssign, get_entry(entry), move(value));
bb.push_back(Conditional(condition, {move(code)}));
}
break;
}
case OpCode::Id::P2R_IMM: {
Node value = Immediate(0);
for (u64 pred = 0; pred < NUM_PROGRAMMABLE_PREDICATES; ++pred) {
Node bit = Operation(OperationCode::Select, GetPredicate(pred), Immediate(1U << pred),
for (u64 entry = 0; entry < num_entries; ++entry) {
Node bit = Operation(OperationCode::Select, get_entry(entry), Immediate(1U << entry),
Immediate(0));
value = Operation(OperationCode::UBitwiseOr, std::move(value), std::move(bit));
value = Operation(OperationCode::UBitwiseOr, move(value), move(bit));
}
value = Operation(OperationCode::UBitwiseAnd, std::move(value), apply_mask);
value = BitfieldInsert(GetRegister(instr.gpr8), std::move(value), offset, 8);
value = Operation(OperationCode::UBitwiseAnd, move(value), apply_mask);
value = BitfieldInsert(GetRegister(instr.gpr8), move(value), offset, 8);
SetRegister(bb, instr.gpr0, std::move(value));
SetRegister(bb, instr.gpr0, move(value));
break;
}
default:

2
src/video_core/shader/node.h
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@ -132,6 +132,8 @@ enum class OperationCode {
LogicalUNotEqual, /// (uint a, uint b) -> bool
LogicalUGreaterEqual, /// (uint a, uint b) -> bool
LogicalAddCarry, /// (uint a, uint b) -> bool
Logical2HLessThan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HLessEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2