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shader: Move loop safety tests to code emission

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This commit is contained in:
ReinUsesLisp
2021-06-21 01:07:10 -03:00
committed by ameerj
parent 3877918e96
commit 808ef97a08
16 changed files with 54 additions and 108 deletions
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1
src/shader_recompiler/backend/glasm/emit_context.h
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@@ -71,6 +71,7 @@ public:
std::string_view stage_name = "invalid";
std::string_view attrib_name = "invalid";
u32 num_safety_loop_vars{};
bool uses_y_direction{};
};

17
src/shader_recompiler/backend/glasm/emit_glasm.cpp
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@@ -6,6 +6,8 @@
#include <string>
#include <tuple>
#include "common/div_ceil.h"
#include "common/settings.h"
#include "shader_recompiler/backend/bindings.h"
#include "shader_recompiler/backend/glasm/emit_context.h"
#include "shader_recompiler/backend/glasm/emit_glasm.h"
@@ -222,6 +224,14 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
ctx.Add("REP;");
break;
case IR::AbstractSyntaxNode::Type::Repeat:
if (!Settings::values.disable_shader_loop_safety_checks) {
const u32 loop_index{ctx.num_safety_loop_vars++};
const u32 vector_index{loop_index / 4};
const char component{"xyzw"[loop_index % 4]};
ctx.Add("SUB.S.CC loop{}.{},loop{}.{},1;"
"BRK(LT.{});",
vector_index, component, vector_index, component, component);
}
if (node.data.repeat.cond.IsImmediate()) {
if (node.data.repeat.cond.U1()) {
ctx.Add("ENDREP;");
@@ -425,6 +435,10 @@ std::string EmitGLASM(const Profile& profile, const RuntimeInfo& runtime_info, I
if (program.info.uses_fswzadd) {
header += "FSWZA[4],FSWZB[4],";
}
const u32 num_safety_loop_vectors{Common::DivCeil(ctx.num_safety_loop_vars, 4u)};
for (u32 index = 0; index < num_safety_loop_vectors; ++index) {
header += fmt::format("loop{},", index);
}
header += "RC;"
"LONG TEMP ";
for (size_t index = 0; index < ctx.reg_alloc.NumUsedLongRegisters(); ++index) {
@@ -441,6 +455,9 @@ std::string EmitGLASM(const Profile& profile, const RuntimeInfo& runtime_info, I
"MOV.F FSWZB[2],1;"
"MOV.F FSWZB[3],-1;";
}
for (u32 index = 0; index < num_safety_loop_vectors; ++index) {
header += fmt::format("MOV.S loop{},{{0x2000,0x2000,0x2000,0x2000}};", index);
}
if (ctx.uses_y_direction) {
header += "PARAM y_direction[1]={state.material.front.ambient};";
}

2
src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
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@@ -42,8 +42,6 @@ void EmitSetGotoVariable(EmitContext& ctx);
void EmitGetGotoVariable(EmitContext& ctx);
void EmitSetIndirectBranchVariable(EmitContext& ctx);
void EmitGetIndirectBranchVariable(EmitContext& ctx);
void EmitSetLoopSafetyVariable(EmitContext& ctx);
void EmitGetLoopSafetyVariable(EmitContext& ctx);
void EmitGetCbufU8(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding, ScalarU32 offset);
void EmitGetCbufS8(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding, ScalarU32 offset);
void EmitGetCbufU16(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding, ScalarU32 offset);

8
src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp
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@@ -153,14 +153,6 @@ void EmitGetIndirectBranchVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitSetLoopSafetyVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitGetLoopSafetyVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitGetZFlag(EmitContext& ctx) {
NotImplemented();
}

2
src/shader_recompiler/backend/glsl/emit_context.h
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@@ -153,6 +153,8 @@ public:
std::vector<TextureImageDefinition> images;
std::array<std::array<GenericElementInfo, 4>, 32> output_generics{};
u32 num_safety_loop_vars{};
bool uses_y_direction{};
bool uses_cc_carry{};

9
src/shader_recompiler/backend/glsl/emit_glsl.cpp
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@@ -6,6 +6,7 @@
#include <string>
#include "common/alignment.h"
#include "common/settings.h"
#include "shader_recompiler/backend/glsl/emit_context.h"
#include "shader_recompiler/backend/glsl/emit_glsl.h"
#include "shader_recompiler/backend/glsl/emit_glsl_instructions.h"
@@ -156,7 +157,12 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
ctx.Add("for(;;){{");
break;
case IR::AbstractSyntaxNode::Type::Repeat:
if (Settings::values.disable_shader_loop_safety_checks) {
ctx.Add("if(!{}){{break;}}}}", ctx.var_alloc.Consume(node.data.repeat.cond));
} else {
ctx.Add("if(--loop{}<0 || !{}){{break;}}}}", ctx.num_safety_loop_vars++,
ctx.var_alloc.Consume(node.data.repeat.cond));
}
break;
default:
throw NotImplementedException("AbstractSyntaxNode Type {}", node.type);
@@ -198,6 +204,9 @@ void DefineVariables(const EmitContext& ctx, std::string& header) {
ctx.var_alloc.Representation(index, type), type_name);
}
}
for (u32 i = 0; i < ctx.num_safety_loop_vars; ++i) {
header += fmt::format("int loop{}=0x2000;", i);
}
}
} // Anonymous namespace

2
src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
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@@ -44,8 +44,6 @@ void EmitSetGotoVariable(EmitContext& ctx);
void EmitGetGotoVariable(EmitContext& ctx);
void EmitSetIndirectBranchVariable(EmitContext& ctx);
void EmitGetIndirectBranchVariable(EmitContext& ctx);
void EmitSetLoopSafetyVariable(EmitContext& ctx);
void EmitGetLoopSafetyVariable(EmitContext& ctx);
void EmitGetCbufU8(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
const IR::Value& offset);
void EmitGetCbufS8(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,

8
src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
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@@ -46,14 +46,6 @@ void EmitGetIndirectBranchVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitSetLoopSafetyVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitGetLoopSafetyVariable(EmitContext& ctx) {
NotImplemented();
}
void EmitGetZFlag(EmitContext& ctx) {
NotImplemented();
}

19
src/shader_recompiler/backend/spirv/emit_spirv.cpp
View File

@@ -8,6 +8,7 @@
#include <utility>
#include <vector>
#include "common/settings.h"
#include "shader_recompiler/backend/spirv/emit_spirv.h"
#include "shader_recompiler/backend/spirv/emit_spirv_instructions.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
@@ -151,9 +152,25 @@ void Traverse(EmitContext& ctx, IR::Program& program) {
}
break;
case IR::AbstractSyntaxNode::Type::Repeat: {
Id cond{ctx.Def(node.data.repeat.cond)};
if (!Settings::values.disable_shader_loop_safety_checks) {
const Id pointer_type{ctx.TypePointer(spv::StorageClass::Private, ctx.U32[1])};
const Id safety_counter{ctx.AddGlobalVariable(
pointer_type, spv::StorageClass::Private, ctx.Const(0x2000u))};
if (ctx.profile.supported_spirv >= 0x00010400) {
ctx.interfaces.push_back(safety_counter);
}
const Id old_counter{ctx.OpLoad(ctx.U32[1], safety_counter)};
const Id new_counter{ctx.OpISub(ctx.U32[1], old_counter, ctx.Const(1u))};
ctx.OpStore(safety_counter, new_counter);
const Id safety_cond{
ctx.OpSGreaterThanEqual(ctx.U1, new_counter, ctx.u32_zero_value)};
cond = ctx.OpLogicalAnd(ctx.U1, cond, safety_cond);
}
const Id loop_header_label{node.data.repeat.loop_header->Definition<Id>()};
const Id merge_label{node.data.repeat.merge->Definition<Id>()};
ctx.OpBranchConditional(ctx.Def(node.data.repeat.cond), loop_header_label, merge_label);
ctx.OpBranchConditional(cond, loop_header_label, merge_label);
break;
}
case IR::AbstractSyntaxNode::Type::Return:

8
src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
View File

@@ -198,14 +198,6 @@ void EmitGetIndirectBranchVariable(EmitContext&) {
throw LogicError("Unreachable instruction");
}
void EmitSetLoopSafetyVariable(EmitContext&) {
throw LogicError("Unreachable instruction");
}
void EmitGetLoopSafetyVariable(EmitContext&) {
throw LogicError("Unreachable instruction");
}
Id EmitGetCbufU8(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
if (ctx.profile.support_descriptor_aliasing && ctx.profile.support_int8) {
const Id load{GetCbuf(ctx, ctx.U8, &UniformDefinitions::U8, sizeof(u8), binding, offset)};

2
src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
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@@ -43,8 +43,6 @@ void EmitSetGotoVariable(EmitContext& ctx);
void EmitGetGotoVariable(EmitContext& ctx);
void EmitSetIndirectBranchVariable(EmitContext& ctx);
void EmitGetIndirectBranchVariable(EmitContext& ctx);
void EmitSetLoopSafetyVariable(EmitContext& ctx);
void EmitGetLoopSafetyVariable(EmitContext& ctx);
Id EmitGetCbufU8(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset);
Id EmitGetCbufS8(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset);
Id EmitGetCbufU16(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset);

8
src/shader_recompiler/frontend/ir/ir_emitter.cpp
View File

@@ -147,14 +147,6 @@ void IREmitter::SetIndirectBranchVariable(const U32& value) {
Inst(Opcode::SetIndirectBranchVariable, value);
}
U32 IREmitter::GetLoopSafetyVariable(u32 id) {
return Inst<U32>(Opcode::GetLoopSafetyVariable, id);
}
void IREmitter::SetLoopSafetyVariable(u32 id, const U32& counter) {
Inst(Opcode::SetLoopSafetyVariable, id, counter);
}
U32 IREmitter::GetCbuf(const U32& binding, const U32& byte_offset) {
return Inst<U32>(Opcode::GetCbufU32, binding, byte_offset);
}

3
src/shader_recompiler/frontend/ir/ir_emitter.h
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@@ -55,9 +55,6 @@ public:
[[nodiscard]] U32 GetIndirectBranchVariable();
void SetIndirectBranchVariable(const U32& value);
[[nodiscard]] U32 GetLoopSafetyVariable(u32 id);
void SetLoopSafetyVariable(u32 id, const U32& counter);
[[nodiscard]] U32 GetCbuf(const U32& binding, const U32& byte_offset);
[[nodiscard]] Value GetCbuf(const U32& binding, const U32& byte_offset, size_t bitsize,
bool is_signed);

2
src/shader_recompiler/frontend/ir/opcodes.inc
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@@ -32,8 +32,6 @@ OPCODE(GetGotoVariable, U1, U32,
OPCODE(SetGotoVariable, Void, U32, U1, )
OPCODE(GetIndirectBranchVariable, U32, )
OPCODE(SetIndirectBranchVariable, Void, U32, )
OPCODE(GetLoopSafetyVariable, U32, U32, )
OPCODE(SetLoopSafetyVariable, Void, U32, U32, )
OPCODE(GetCbufU8, U32, U32, U32, )
OPCODE(GetCbufS8, U32, U32, U32, )
OPCODE(GetCbufU16, U32, U32, U32, )

33
src/shader_recompiler/frontend/maxwell/structured_control_flow.cpp
View File

@@ -15,7 +15,6 @@
#include <boost/intrusive/list.hpp>
#include "common/settings.h"
#include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
@@ -663,7 +662,7 @@ public:
Visit(root_stmt, nullptr, nullptr);
IR::Block& first_block{*syntax_list.front().data.block};
IR::IREmitter ir = IR::IREmitter(first_block, first_block.begin());
IR::IREmitter ir(first_block, first_block.begin());
ir.Prologue();
}
@@ -741,28 +740,9 @@ private:
}
case StatementType::Loop: {
IR::Block* const loop_header_block{block_pool.Create(inst_pool)};
const u32 this_loop_id{loop_id++};
if (Settings::values.disable_shader_loop_safety_checks) {
if (current_block) {
current_block->AddBranch(loop_header_block);
}
} else {
IR::Block* const init_block{block_pool.Create(inst_pool)};
IR::IREmitter ir{*init_block};
static constexpr u32 SAFETY_THRESHOLD = 0x1000;
ir.SetLoopSafetyVariable(this_loop_id, ir.Imm32(SAFETY_THRESHOLD));
if (current_block) {
current_block->AddBranch(init_block);
}
init_block->AddBranch(loop_header_block);
auto& init_node{syntax_list.emplace_back()};
init_node.type = IR::AbstractSyntaxNode::Type::Block;
init_node.data.block = init_block;
}
auto& header_node{syntax_list.emplace_back()};
header_node.type = IR::AbstractSyntaxNode::Type::Block;
header_node.data.block = loop_header_block;
@@ -779,16 +759,7 @@ private:
// The continue block is located at the end of the loop
IR::IREmitter ir{*continue_block};
IR::U1 cond{VisitExpr(ir, *stmt.cond)};
if (!Settings::values.disable_shader_loop_safety_checks) {
const IR::U32 old_counter{ir.GetLoopSafetyVariable(this_loop_id)};
const IR::U32 new_counter{ir.ISub(old_counter, ir.Imm32(1))};
ir.SetLoopSafetyVariable(this_loop_id, new_counter);
const IR::U1 safety_cond{ir.INotEqual(new_counter, ir.Imm32(0))};
cond = ir.LogicalAnd(cond, safety_cond);
}
cond = ir.ConditionRef(cond);
const IR::U1 cond{ir.ConditionRef(VisitExpr(ir, *stmt.cond))};
IR::Block* const body_block{syntax_list.at(body_block_index).data.block};
loop_header_block->AddBranch(body_block);

32
src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
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@@ -48,22 +48,12 @@ struct GotoVariable : FlagTag {
u32 index;
};
struct LoopSafetyVariable {
LoopSafetyVariable() = default;
explicit LoopSafetyVariable(u32 index_) : index{index_} {}
auto operator<=>(const LoopSafetyVariable&) const noexcept = default;
u32 index;
};
struct IndirectBranchVariable {
auto operator<=>(const IndirectBranchVariable&) const noexcept = default;
};
using Variant =
std::variant<IR::Reg, IR::Pred, ZeroFlagTag, SignFlagTag, CarryFlagTag, OverflowFlagTag,
GotoVariable, LoopSafetyVariable, IndirectBranchVariable>;
using Variant = std::variant<IR::Reg, IR::Pred, ZeroFlagTag, SignFlagTag, CarryFlagTag,
OverflowFlagTag, GotoVariable, IndirectBranchVariable>;
using ValueMap = boost::container::flat_map<IR::Block*, IR::Value>;
struct DefTable {
@@ -88,13 +78,6 @@ struct DefTable {
goto_vars[variable.index].insert_or_assign(block, value);
}
const IR::Value& Def(IR::Block* block, LoopSafetyVariable variable) {
return loop_safety_vars[variable.index][block];
}
void SetDef(IR::Block* block, LoopSafetyVariable variable, const IR::Value& value) {
loop_safety_vars[variable.index].insert_or_assign(block, value);
}
const IR::Value& Def(IR::Block* block, IndirectBranchVariable) {
return indirect_branch_var[block];
}
@@ -132,7 +115,6 @@ struct DefTable {
std::array<ValueMap, IR::NUM_USER_PREDS> preds;
boost::container::flat_map<u32, ValueMap> goto_vars;
boost::container::flat_map<u32, ValueMap> loop_safety_vars;
ValueMap indirect_branch_var;
ValueMap zero_flag;
ValueMap sign_flag;
@@ -152,10 +134,6 @@ IR::Opcode UndefOpcode(const FlagTag&) noexcept {
return IR::Opcode::UndefU1;
}
IR::Opcode UndefOpcode(const LoopSafetyVariable&) noexcept {
return IR::Opcode::UndefU32;
}
IR::Opcode UndefOpcode(IndirectBranchVariable) noexcept {
return IR::Opcode::UndefU32;
}
@@ -337,9 +315,6 @@ void VisitInst(Pass& pass, IR::Block* block, IR::Inst& inst) {
case IR::Opcode::SetGotoVariable:
pass.WriteVariable(GotoVariable{inst.Arg(0).U32()}, block, inst.Arg(1));
break;
case IR::Opcode::SetLoopSafetyVariable:
pass.WriteVariable(LoopSafetyVariable{inst.Arg(0).U32()}, block, inst.Arg(1));
break;
case IR::Opcode::SetIndirectBranchVariable:
pass.WriteVariable(IndirectBranchVariable{}, block, inst.Arg(0));
break;
@@ -368,9 +343,6 @@ void VisitInst(Pass& pass, IR::Block* block, IR::Inst& inst) {
case IR::Opcode::GetGotoVariable:
inst.ReplaceUsesWith(pass.ReadVariable(GotoVariable{inst.Arg(0).U32()}, block));
break;
case IR::Opcode::GetLoopSafetyVariable:
inst.ReplaceUsesWith(pass.ReadVariable(LoopSafetyVariable{inst.Arg(0).U32()}, block));
break;
case IR::Opcode::GetIndirectBranchVariable:
inst.ReplaceUsesWith(pass.ReadVariable(IndirectBranchVariable{}, block));
break;