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shader: ISET.X implementation

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This commit is contained in:
ameerj 2021-05-05 00:37:05 -04:00
parent bfa47539f6
commit 09dc23f971
1 changed files with 58 additions and 8 deletions
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66
src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare_and_set.cpp
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@ -9,7 +9,56 @@
namespace Shader::Maxwell {
namespace {
void ISET(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
IR::U1 ExtendedIntegerCompare(IR::IREmitter& ir, const IR::U32& operand_1, const IR::U32& operand_2,
CompareOp compare_op, bool is_signed) {
const IR::U32 zero{ir.Imm32(0)};
const IR::U32 carry{ir.Select(ir.GetCFlag(), ir.Imm32(1), zero)};
const IR::U1 z_flag{ir.GetZFlag()};
const IR::U32 intermediate{ir.IAdd(ir.IAdd(operand_1, ir.BitwiseNot(operand_2)), carry)};
const IR::U1 flip_logic{is_signed ? ir.Imm1(false)
: ir.LogicalXor(ir.ILessThan(operand_1, zero, true),
ir.ILessThan(operand_2, zero, true))};
switch (compare_op) {
case CompareOp::False:
return ir.Imm1(false);
case CompareOp::LessThan:
return IR::U1{ir.Select(flip_logic, ir.IGreaterThanEqual(intermediate, zero, true),
ir.ILessThan(intermediate, zero, true))};
case CompareOp::Equal:
return ir.LogicalAnd(ir.IEqual(intermediate, zero), z_flag);
case CompareOp::LessThanEqual: {
const IR::U1 base_cmp{ir.Select(flip_logic, ir.IGreaterThanEqual(intermediate, zero, true),
ir.ILessThan(intermediate, zero, true))};
return ir.LogicalOr(base_cmp, ir.LogicalAnd(ir.IEqual(intermediate, zero), z_flag));
}
case CompareOp::GreaterThan: {
const IR::U1 base_cmp{ir.Select(flip_logic, ir.ILessThanEqual(intermediate, zero, true),
ir.IGreaterThan(intermediate, zero, true))};
const IR::U1 not_z{ir.LogicalNot(z_flag)};
return ir.LogicalOr(base_cmp, ir.LogicalAnd(ir.IEqual(intermediate, zero), not_z));
}
case CompareOp::NotEqual:
return ir.LogicalOr(ir.INotEqual(intermediate, zero),
ir.LogicalAnd(ir.IEqual(intermediate, zero), ir.LogicalNot(z_flag)));
case CompareOp::GreaterThanEqual: {
const IR::U1 base_cmp{ir.Select(flip_logic, ir.ILessThan(intermediate, zero, true),
ir.IGreaterThanEqual(intermediate, zero, true))};
return ir.LogicalOr(base_cmp, ir.LogicalAnd(ir.IEqual(intermediate, zero), z_flag));
}
case CompareOp::True:
return ir.Imm1(true);
default:
throw NotImplementedException("Invalid compare op {}", compare_op);
}
}
IR::U1 IsetCompare(IR::IREmitter& ir, const IR::U32& operand_1, const IR::U32& operand_2,
CompareOp compare_op, bool is_signed, bool x) {
return x ? ExtendedIntegerCompare(ir, operand_1, operand_2, compare_op, is_signed)
: IntegerCompare(ir, operand_1, operand_2, compare_op, is_signed);
}
void ISET(TranslatorVisitor& v, u64 insn, const IR::U32& src_b) {
union {
u64 insn;
BitField<0, 8, IR::Reg> dest_reg;
@ -24,27 +73,28 @@ void ISET(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
BitField<49, 3, CompareOp> compare_op;
} const iset{insn};
if (iset.x != 0) {
throw NotImplementedException("ISET.X");
}
const IR::U32 src_reg{v.X(iset.src_reg)};
const IR::U32 src_a{v.X(iset.src_reg)};
const bool is_signed{iset.is_signed != 0};
const IR::U32 zero{v.ir.Imm32(0)};
const bool x{iset.x != 0};
const IR::U1 cmp_result{IsetCompare(v.ir, src_a, src_b, iset.compare_op, is_signed, x)};
IR::U1 pred{v.ir.GetPred(iset.pred)};
if (iset.neg_pred != 0) {
pred = v.ir.LogicalNot(pred);
}
const IR::U1 cmp_result{IntegerCompare(v.ir, src_reg, src_a, iset.compare_op, is_signed)};
const IR::U1 bop_result{PredicateCombine(v.ir, cmp_result, pred, iset.bop)};
const IR::U32 one_mask{v.ir.Imm32(-1)};
const IR::U32 fp_one{v.ir.Imm32(0x3f800000)};
const IR::U32 zero{v.ir.Imm32(0)};
const IR::U32 pass_result{iset.bf == 0 ? one_mask : fp_one};
const IR::U32 result{v.ir.Select(bop_result, pass_result, zero)};
v.X(iset.dest_reg, result);
if (iset.cc != 0) {
if (x) {
throw NotImplementedException("ISET.CC + X");
}
const IR::U1 is_zero{v.ir.IEqual(result, zero)};
v.SetZFlag(is_zero);
if (iset.bf != 0) {