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shader: Implement I2I SAT

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pull/8/head
ameerj 4 years ago
parent 3c758d9b53
commit dbc1e5cde7
6 changed files with 52 additions and 10 deletions
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2
src/shader_recompiler/backend/spirv/emit_spirv.h
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@ -287,6 +287,8 @@ Id EmitSMin32(EmitContext& ctx, Id a, Id b);
Id EmitUMin32(EmitContext& ctx, Id a, Id b);
Id EmitSMax32(EmitContext& ctx, Id a, Id b);
Id EmitUMax32(EmitContext& ctx, Id a, Id b);
Id EmitSClamp32(EmitContext& ctx, Id value, Id min, Id max);
Id EmitUClamp32(EmitContext& ctx, Id value, Id min, Id max);
Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs);
Id EmitULessThan(EmitContext& ctx, Id lhs, Id rhs);
Id EmitIEqual(EmitContext& ctx, Id lhs, Id rhs);

8
src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp
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@ -163,6 +163,14 @@ Id EmitUMax32(EmitContext& ctx, Id a, Id b) {
return ctx.OpUMax(ctx.U32[1], a, b);
}
Id EmitSClamp32(EmitContext& ctx, Id value, Id min, Id max) {
return ctx.OpSClamp(ctx.U32[1], value, min, max);
}
Id EmitUClamp32(EmitContext& ctx, Id value, Id min, Id max) {
return ctx.OpUClamp(ctx.U32[1], value, min, max);
}
Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs) {
return ctx.OpSLessThan(ctx.U1, lhs, rhs);
}

8
src/shader_recompiler/frontend/ir/ir_emitter.cpp
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@ -1183,6 +1183,14 @@ U32 IREmitter::IMax(const U32& a, const U32& b, bool is_signed) {
return is_signed ? SMax(a, b) : UMax(a, b);
}
U32 IREmitter::SClamp(const U32& value, const U32& min, const U32& max) {
return Inst<U32>(Opcode::SClamp32, value, min, max);
}
U32 IREmitter::UClamp(const U32& value, const U32& min, const U32& max) {
return Inst<U32>(Opcode::UClamp32, value, min, max);
}
U1 IREmitter::ILessThan(const U32& lhs, const U32& rhs, bool is_signed) {
return Inst<U1>(is_signed ? Opcode::SLessThan : Opcode::ULessThan, lhs, rhs);
}

2
src/shader_recompiler/frontend/ir/ir_emitter.h
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@ -206,6 +206,8 @@ public:
[[nodiscard]] U32 SMax(const U32& a, const U32& b);
[[nodiscard]] U32 UMax(const U32& a, const U32& b);
[[nodiscard]] U32 IMax(const U32& a, const U32& b, bool is_signed);
[[nodiscard]] U32 SClamp(const U32& value, const U32& min, const U32& max);
[[nodiscard]] U32 UClamp(const U32& value, const U32& min, const U32& max);
[[nodiscard]] U1 ILessThan(const U32& lhs, const U32& rhs, bool is_signed);
[[nodiscard]] U1 IEqual(const U32U64& lhs, const U32U64& rhs);

2
src/shader_recompiler/frontend/ir/opcodes.inc
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@ -299,6 +299,8 @@ OPCODE(SMin32, U32, U32,
OPCODE(UMin32, U32, U32, U32, )
OPCODE(SMax32, U32, U32, U32, )
OPCODE(UMax32, U32, U32, U32, )
OPCODE(SClamp32, U32, U32, U32, U32, )
OPCODE(UClamp32, U32, U32, U32, U32, )
OPCODE(SLessThan, U1, U32, U32, )
OPCODE(ULessThan, U1, U32, U32, )
OPCODE(IEqual, U1, U32, U32, )

40
src/shader_recompiler/frontend/maxwell/translate/impl/integer_to_integer_conversion.cpp
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@ -30,16 +30,33 @@ enum class IntegerWidth : u64 {
[[nodiscard]] IR::U32 ConvertInteger(IR::IREmitter& ir, const IR::U32& src,
IntegerWidth dst_width) {
const IR::U32 zero{ir.Imm32(0)};
const IR::U32 count{WidthSize(ir, dst_width)};
return ir.BitFieldExtract(src, zero, count, false);
}
[[nodiscard]] IR::U32 SaturateInteger(IR::IREmitter& ir, const IR::U32& src, IntegerWidth dst_width,
bool dst_signed, bool src_signed) {
IR::U32 min{};
IR::U32 max{};
const IR::U32 zero{ir.Imm32(0)};
switch (dst_width) {
case IntegerWidth::Byte:
return ir.BitFieldExtract(src, zero, ir.Imm32(8), false);
min = dst_signed && src_signed ? ir.Imm32(0xffffff80) : zero;
max = dst_signed ? ir.Imm32(0x7f) : ir.Imm32(0xff);
break;
case IntegerWidth::Short:
return ir.BitFieldExtract(src, zero, ir.Imm32(16), false);
min = dst_signed && src_signed ? ir.Imm32(0xffff8000) : zero;
max = dst_signed ? ir.Imm32(0x7fff) : ir.Imm32(0xffff);
break;
case IntegerWidth::Word:
return ir.BitFieldExtract(src, zero, ir.Imm32(32), false);
min = dst_signed && src_signed ? ir.Imm32(0x80000000) : zero;
max = dst_signed ? ir.Imm32(0x7fffffff) : ir.Imm32(0xffffffff);
break;
default:
throw NotImplementedException("Invalid width {}", dst_width);
}
const IR::U32 value{!dst_signed && src_signed ? ir.SMax(zero, src) : src};
return dst_signed && src_signed ? ir.SClamp(value, min, max) : ir.UClamp(value, min, max);
}
void I2I(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
@ -60,9 +77,6 @@ void I2I(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
if (i2i.cc != 0) {
throw NotImplementedException("I2I CC");
}
if (i2i.sat != 0) {
throw NotImplementedException("I2I SAT");
}
if (i2i.src_fmt == IntegerWidth::Short && (i2i.selector == 1 || i2i.selector == 3)) {
throw NotImplementedException("16-bit source format incompatible with selector {}",
i2i.selector);
@ -75,15 +89,21 @@ void I2I(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
const s32 selector{static_cast<s32>(i2i.selector)};
const IR::U32 offset{v.ir.Imm32(selector * 8)};
const IR::U32 count{WidthSize(v.ir, i2i.src_fmt)};
IR::U32 src_values{v.ir.BitFieldExtract(src_a, offset, count, i2i.src_fmt_sign != 0)};
if (i2i.abs) {
const bool src_signed{i2i.src_fmt_sign != 0};
const bool dst_signed{i2i.dst_fmt_sign != 0};
const bool sat{i2i.sat != 0};
IR::U32 src_values{v.ir.BitFieldExtract(src_a, offset, count, src_signed)};
if (i2i.abs != 0) {
src_values = v.ir.IAbs(src_values);
}
if (i2i.neg) {
if (i2i.neg != 0) {
src_values = v.ir.INeg(src_values);
}
const IR::U32 result{
sat ? SaturateInteger(v.ir, src_values, i2i.dst_fmt, dst_signed, src_signed)
: ConvertInteger(v.ir, src_values, i2i.dst_fmt)};
const IR::U32 result{ConvertInteger(v.ir, src_values, i2i.dst_fmt)};
v.X(i2i.dest_reg, result);
}
} // Anonymous namespace

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