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IR: Add microinstructions UnsignedSaturation and SignedSaturation

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MerryMage 2016-12-21 14:16:48 +00:00 • committed by Merry
parent b1df70578f
commit 6a269a6ebd
4 changed files with 93 additions and 0 deletions
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14
src/frontend/ir/ir_emitter.cpp
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@ -348,6 +348,20 @@ IREmitter::ResultAndOverflow IREmitter::SignedSaturatedSub(const Value& a, const
return {result, overflow};
}
IREmitter::ResultAndOverflow IREmitter::UnsignedSaturation(const Value& a, size_t bit_size_to_saturate_to) {
ASSERT(bit_size_to_saturate_to <= 31);
auto result = Inst(Opcode::UnsignedSaturation, {a, Imm8(static_cast<u8>(bit_size_to_saturate_to))});
auto overflow = Inst(Opcode::GetOverflowFromOp, {result});
return {result, overflow};
}
IREmitter::ResultAndOverflow IREmitter::SignedSaturation(const Value& a, size_t bit_size_to_saturate_to) {
ASSERT(bit_size_to_saturate_to >= 1 && bit_size_to_saturate_to <= 32);
auto result = Inst(Opcode::SignedSaturation, {a, Imm8(static_cast<u8>(bit_size_to_saturate_to))});
auto overflow = Inst(Opcode::GetOverflowFromOp, {result});
return {result, overflow};
}
IREmitter::ResultAndGE IREmitter::PackedAddU8(const Value& a, const Value& b) {
auto result = Inst(Opcode::PackedAddU8, {a, b});
auto ge = Inst(Opcode::GetGEFromOp, {result});

2
src/frontend/ir/ir_emitter.h
View file

@ -138,6 +138,8 @@ public:
ResultAndOverflow SignedSaturatedAdd(const Value& a, const Value& b);
ResultAndOverflow SignedSaturatedSub(const Value& a, const Value& b);
ResultAndOverflow UnsignedSaturation(const Value& a, size_t bit_size_to_saturate_to);
ResultAndOverflow SignedSaturation(const Value& a, size_t bit_size_to_saturate_to);
ResultAndGE PackedAddU8(const Value& a, const Value& b);
ResultAndGE PackedAddS8(const Value& a, const Value& b);

2
src/frontend/ir/opcodes.inc
View file

@ -79,6 +79,8 @@ OPCODE(NegateHighWord, T::U32, T::U32
// Saturated instructions
OPCODE(SignedSaturatedAdd, T::U32, T::U32, T::U32 )
OPCODE(SignedSaturatedSub, T::U32, T::U32, T::U32 )
OPCODE(UnsignedSaturation, T::U32, T::U32, T::U8 )
OPCODE(SignedSaturation, T::U32, T::U32, T::U8 )
// Packed instructions
OPCODE(PackedAddU8, T::U32, T::U32, T::U32 )