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Merge pull request #510 from Subv/isetp

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GPU: Implemented the ISETP_R and ISETP_C instructions
This commit is contained in:
bunnei 2018-06-04 20:47:11 -04:00 committed by GitHub
parent 37fd4e6d9b 90cddf1996
commit f564822e78
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 63 additions and 6 deletions
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10
src/video_core/engines/shader_bytecode.h
View file

@ -238,6 +238,16 @@ union Instruction {
BitField<56, 1, u64> neg_b;
} fsetp;
union {
BitField<0, 3, u64> pred0;
BitField<3, 3, u64> pred3;
BitField<39, 3, u64> pred39;
BitField<42, 1, u64> neg_pred;
BitField<45, 2, PredOperation> op;
BitField<48, 1, u64> is_signed;
BitField<49, 3, PredCondition> cond;
} isetp;
union {
BitField<39, 3, u64> pred39;
BitField<42, 1, u64> neg_pred;

59
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -219,6 +219,11 @@ public:
return active_type == Type::Integer;
}
/// Returns the current active type of the register
Type GetActiveType() const {
return active_type;
}
/// Returns the index of the register
size_t GetIndex() const {
return index;
@ -350,22 +355,28 @@ public:
shader.AddLine(dest + " = " + src + ';');
}
/// Generates code representing a uniform (C buffer) register.
std::string GetUniform(const Uniform& uniform, const Register& dest_reg) {
/// Generates code representing a uniform (C buffer) register, interpreted as the input type.
std::string GetUniform(const Uniform& uniform, GLSLRegister::Type type) {
declr_const_buffers[uniform.index].MarkAsUsed(static_cast<unsigned>(uniform.index),
static_cast<unsigned>(uniform.offset), stage);
std::string value =
'c' + std::to_string(uniform.index) + '[' + std::to_string(uniform.offset) + ']';
if (regs[dest_reg].IsFloat()) {
if (type == GLSLRegister::Type::Float) {
return value;
} else if (regs[dest_reg].IsInteger()) {
} else if (type == GLSLRegister::Type::Integer) {
return "floatBitsToInt(" + value + ')';
} else {
UNREACHABLE();
}
}
/// Generates code representing a uniform (C buffer) register, interpreted as the type of the
/// destination register.
std::string GetUniform(const Uniform& uniform, const Register& dest_reg) {
return GetUniform(uniform, regs[dest_reg].GetActiveType());
}
/// Add declarations for registers
void GenerateDeclarations() {
for (const auto& reg : regs) {
@ -1018,7 +1029,7 @@ private:
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsFloat(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
op_b += regs.GetUniform(instr.uniform, GLSLRegister::Type::Float);
}
}
@ -1049,6 +1060,42 @@ private:
}
break;
}
case OpCode::Type::IntegerSetPredicate: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8, 0, instr.isetp.is_signed);
std::string op_b{};
ASSERT_MSG(!instr.is_b_imm, "ISETP_IMM not implemented");
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsInteger(instr.gpr20, 0, instr.isetp.is_signed);
} else {
op_b += regs.GetUniform(instr.uniform, GLSLRegister::Type::Integer);
}
using Tegra::Shader::Pred;
// We can't use the constant predicate as destination.
ASSERT(instr.isetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
std::string second_pred =
GetPredicateCondition(instr.isetp.pred39, instr.isetp.neg_pred != 0);
std::string comparator = GetPredicateComparison(instr.isetp.cond);
std::string combiner = GetPredicateCombiner(instr.isetp.op);
std::string predicate = '(' + op_a + ") " + comparator + " (" + op_b + ')';
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(instr.isetp.pred3,
'(' + predicate + ") " + combiner + " (" + second_pred + ')');
if (instr.isetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
SetPredicate(instr.isetp.pred0,
"!(" + predicate + ") " + combiner + " (" + second_pred + ')');
}
break;
}
case OpCode::Type::FloatSet: {
std::string op_a = instr.fset.neg_a ? "-" : "";
op_a += regs.GetRegisterAsFloat(instr.gpr8);
@ -1069,7 +1116,7 @@ private:
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsFloat(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
op_b += regs.GetUniform(instr.uniform, GLSLRegister::Type::Float);
}
}