ShuriZma
/
xenia
mirror of https://github.com/xenia-project/xenia.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[a64] Implement `OPCODE_VECTOR_SHL` 

Vector registers are passed as pointers rather than directly in the `Qn` registers. So these functions should be taking pointer-type arguments rather than vector-register types directly.

Fixes `OPCODE_VECTOR_SHL` and passes unit tests.
This commit is contained in:
Wunkolo 2024-05-04 11:23:45 -07:00
parent 3d345d71a7
commit 07a4df8e2f
1 changed files with 86 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
src/xenia/cpu/backend/a64/a64_seq_vector.cc
View File

@ -424,7 +424,23 @@ EMITTER_OPCODE_TABLE(OPCODE_VECTOR_SUB, VECTOR_SUB);
// ============================================================================
// OPCODE_VECTOR_SHL
// ============================================================================
template <typename T, std::enable_if_t<std::is_integral<T>::value, int> = 0>
static uint8x16_t EmulateVectorShl(void*, std::byte src1[16],
std::byte src2[16]) {
alignas(16) T value[16 / sizeof(T)];
alignas(16) T shamt[16 / sizeof(T)];
// Load NEON registers into a C array.
vst1q_u8(reinterpret_cast<T*>(value), vld1q_u8(src1));
vst1q_u8(reinterpret_cast<T*>(shamt), vld1q_u8(src2));
for (size_t i = 0; i < (16 / sizeof(T)); ++i) {
value[i] = value[i] << (shamt[i] & ((sizeof(T) * 8) - 1));
}
// Store result and return it.
return vld1q_u8(value);
}
struct VECTOR_SHL_V128
: Sequence<VECTOR_SHL_V128, I<OPCODE_VECTOR_SHL, V128Op, V128Op, V128Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {
@ -444,11 +460,77 @@ struct VECTOR_SHL_V128
}
}
static void EmitInt8(A64Emitter& e, const EmitArgType& i) {}
static void EmitInt8(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
const auto& shamt = i.src2.constant();
bool all_same = true;
for (size_t n = 0; n < 16 - n; ++n) {
if (shamt.u8[n] != shamt.u8[n + 1]) {
all_same = false;
break;
}
}
if (all_same) {
// Every count is the same, so we can use SHL
e.SHL(i.dest.reg().B16(), i.src1.reg().B16(), shamt.u8[0]);
return;
}
e.ADD(e.GetNativeParam(1), XSP, e.StashConstantV(1, i.src2.constant()));
} else {
e.ADD(e.GetNativeParam(1), XSP, e.StashV(1, i.src2));
}
e.ADD(e.GetNativeParam(0), XSP, e.StashV(0, i.src1));
e.CallNativeSafe(reinterpret_cast<void*>(EmulateVectorShl<uint8_t>));
e.MOV(i.dest.reg().B16(), Q0.B16());
}
static void EmitInt16(A64Emitter& e, const EmitArgType& i) {}
static void EmitInt16(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
const auto& shamt = i.src2.constant();
bool all_same = true;
for (size_t n = 0; n < 16 - n; ++n) {
if (shamt.u8[n] != shamt.u8[n + 1]) {
all_same = false;
break;
}
}
if (all_same) {
// Every count is the same, so we can use SHL
e.SHL(i.dest.reg().H8(), i.src1.reg().H8(), shamt.u8[0]);
return;
}
e.ADD(e.GetNativeParam(1), XSP, e.StashConstantV(1, i.src2.constant()));
} else {
e.ADD(e.GetNativeParam(1), XSP, e.StashV(1, i.src2));
}
e.ADD(e.GetNativeParam(0), XSP, e.StashV(0, i.src1));
e.CallNativeSafe(reinterpret_cast<void*>(EmulateVectorShl<uint16_t>));
e.MOV(i.dest.reg().B16(), Q0.B16());
}
static void EmitInt32(A64Emitter& e, const EmitArgType& i) {}
static void EmitInt32(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
const auto& shamt = i.src2.constant();
bool all_same = true;
for (size_t n = 0; n < 16 - n; ++n) {
if (shamt.u8[n] != shamt.u8[n + 1]) {
all_same = false;
break;
}
}
if (all_same) {
// Every count is the same, so we can use SHL
e.SHL(i.dest.reg().S4(), i.src1.reg().S4(), shamt.u8[0]);
return;
}
e.ADD(e.GetNativeParam(1), XSP, e.StashConstantV(1, i.src2.constant()));
} else {
e.ADD(e.GetNativeParam(1), XSP, e.StashV(1, i.src2));
}
e.ADD(e.GetNativeParam(0), XSP, e.StashV(0, i.src1));
e.CallNativeSafe(reinterpret_cast<void*>(EmulateVectorShl<uint32_t>));
e.MOV(i.dest.reg().B16(), Q0.B16());
}
};
EMITTER_OPCODE_TABLE(OPCODE_VECTOR_SHL, VECTOR_SHL_V128);
@ -491,7 +573,7 @@ static uint8x16_t EmulateVectorShr(void*, uint8x16_t src1, uint8x16_t src2) {
alignas(16) T value[16 / sizeof(T)];
alignas(16) T shamt[16 / sizeof(T)];
// Load SSE registers into a C array.
// Load NEON registers into a C array.
vst1q_u8(reinterpret_cast<T*>(value), src1);
vst1q_u8(reinterpret_cast<T*>(shamt), src2);