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[CPU] Add constant VectorAverage.

This commit is contained in:
gibbed 2018-11-18 08:03:52 -06:00
parent 21b8620bf5
commit 3ced6c5cf2
3 changed files with 34 additions and 0 deletions
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11
src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
View File

@ -772,6 +772,17 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
}
break;
case OPCODE_VECTOR_AVERAGE:
if (i->src1.value->IsConstant() && i->src2.value->IsConstant()) {
v->set_from(i->src1.value);
uint32_t arith_flags = i->flags >> 8;
v->VectorAverage(i->src2.value, hir::TypeName(i->flags & 0xFF),
!!(arith_flags & ARITHMETIC_UNSIGNED),
!!(arith_flags & ARITHMETIC_SATURATE));
i->Remove();
}
break;
default:
// Ignored.
break;

21
src/xenia/cpu/hir/value.cc
View File

@ -1376,6 +1376,27 @@ void Value::DotProduct4(Value* other) {
}
}
void Value::VectorAverage(Value* other, TypeName type, bool is_unsigned,
bool saturate) {
assert_true(this->type == VEC128_TYPE && other->type == VEC128_TYPE);
switch (type) {
case INT16_TYPE:
// TODO(gibbed): is this correct?
alignas(16) int8_t result[16];
__m128i src1 =
_mm_load_si128(reinterpret_cast<const __m128i*>(constant.v128.i8));
__m128i src2 = _mm_load_si128(
reinterpret_cast<const __m128i*>(other->constant.v128.i8));
__m128i dest = _mm_avg_epu16(src1, src2);
_mm_store_si128(reinterpret_cast<__m128i*>(result), dest);
std::memcpy(constant.v128.i8, result, sizeof(result));
break;
default:
assert_unhandled_case(type);
break;
}
}
void Value::ByteSwap() {
switch (type) {
case INT8_TYPE:

2
src/xenia/cpu/hir/value.h
View File

@ -535,6 +535,8 @@ class Value {
void VectorSub(Value* other, TypeName type, bool is_unsigned, bool saturate);
void DotProduct3(Value* other);
void DotProduct4(Value* other);
void VectorAverage(Value* other, TypeName type, bool is_unsigned,
bool saturate);
void ByteSwap();
void CountLeadingZeros(const Value* other);
bool Compare(Opcode opcode, Value* other);