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shader: implement V_SIN_F16 (#399)

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Co-authored-by: nmzik <Nmzik@mail.ru>
This commit is contained in:
Mehmet Cambaz
2026-08-30 00:32:49 +03:00
committed by GitHub
parent 60a01817ce
commit ff61c1cecd
7 changed files with 99 additions and 15 deletions
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src/graphics/shader/recompiler/frontend/translate/Float.cpp
+25 -13
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@@ -63,22 +63,34 @@ bool Translator::Float16Unary(const Decoder::Instruction& inst, IR::ValueOpcode
return true;
}
bool Translator::V_COS_F16(const Decoder::Instruction& inst) {
bool Translator::Float16Trig(const Decoder::Instruction& inst, IR::ValueOpcode opcode) {
const auto argument = ReadF16AsF32(inst.src0);
auto result = IR::F32(ir.Emit(IR::ValueOpcode::FPCos, {argument}));
// The architectural quarter-cycle result is exactly zero. Evaluating cos(pi/2) with a
// rounded F32 PI can otherwise produce a half-precision subnormal instead.
const auto fraction = IR::F32(ir.Emit(IR::ValueOpcode::FPFract32, {argument}));
const auto quarter = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.25f)}));
const auto three_quarters = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.75f)}));
result = IR::F32(ir.Emit(IR::ValueOpcode::SelectF32,
{ir.LogicalOr(quarter, three_quarters), IR::Value::F32(0.0f), result}));
const auto magnitude =
ir.BitwiseAnd(ir.BitCastU32(argument), IR::U32(IR::Value(0x7fffffffu)));
auto result = IR::F32(ir.Emit(opcode, {argument}));
if (opcode == IR::ValueOpcode::FPSin) {
const auto fraction = IR::F32(ir.Emit(IR::ValueOpcode::FPFract32, {argument}));
const auto whole = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.0f)}));
const auto half = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.5f)}));
const auto nonzero = ir.INotEqual(magnitude, IR::U32(IR::Value(0u)));
const auto cardinal = ir.LogicalOr(ir.LogicalAnd(whole, nonzero), half);
result = IR::F32(ir.Emit(
IR::ValueOpcode::SelectF32, {cardinal, IR::Value::F32(0.0f), result}));
} else {
// The architectural quarter-cycle result is exactly zero. Evaluating cos(pi/2) with a
// rounded F32 PI can otherwise produce a half-precision subnormal instead.
const auto fraction = IR::F32(ir.Emit(IR::ValueOpcode::FPFract32, {argument}));
const auto quarter = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.25f)}));
const auto three_quarters = IR::U1(
ir.Emit(IR::ValueOpcode::FPOrdEqual32, {fraction, IR::Value::F32(0.75f)}));
result = IR::F32(
ir.Emit(IR::ValueOpcode::SelectF32,
{ir.LogicalOr(quarter, three_quarters), IR::Value::F32(0.0f), result}));
}
const auto infinite = ir.IEqual(magnitude, IR::U32(IR::Value(0x7f800000u)));
result = ApplyF32ResultModifiers(inst.dst, result);
const auto bits = PackHalf2x16(result, IR::F32(IR::Value::F32(0.0f)));