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simd_scalar_x_indexed_element: Factor out index and Vm argument construction

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This will be useful in the implementations of SQRDMULH and SQDMULL{2} as
well.
This commit is contained in:
Lioncash 2019-03-20 22:28:42 -04:00 committed by MerryMage
parent 42b090d234
commit 72af5a3dff
2 changed files with 10 additions and 9 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -537,7 +537,7 @@ INST(FCVTZU_fix_1, "FCVTZU (vector, fixed-point)", "01111
//INST(SQDMLSL_elt_1, "SQDMLSL, SQDMLSL2 (by element)", "01011111zzLMmmmm0111H0nnnnnddddd")
//INST(SQDMULL_elt_1, "SQDMULL, SQDMULL2 (by element)", "01011111zzLMmmmm1011H0nnnnnddddd")
INST(SQDMULH_elt_1, "SQDMULH (by element)", "01011111zzLMmmmm1100H0nnnnnddddd")
//INST(SQRDMULH_elt_1, "SQRDMULH (by element)", "01011111zzLMmmmm1101H0nnnnnddddd")
INST(SQRDMULH_elt_1, "SQRDMULH (by element)", "01011111zzLMmmmm1101H0nnnnnddddd")
//INST(FMLA_elt_1, "FMLA (by element)", "0101111100LMmmmm0001H0nnnnnddddd")
INST(FMLA_elt_2, "FMLA (by element)", "010111111zLMmmmm0001H0nnnnnddddd")
//INST(FMLS_elt_1, "FMLS (by element)", "0101111100LMmmmm0101H0nnnnnddddd")

17
src/frontend/A64/translate/impl/simd_scalar_x_indexed_element.cpp
View file

@ -9,6 +9,14 @@
namespace Dynarmic::A64 {
namespace {
std::pair<size_t, Vec> Combine(Imm<2> size, Imm<1> H, Imm<1> L, Imm<1> M, Imm<4> Vmlo) {
if (size == 0b01) {
return {concatenate(H, L, M).ZeroExtend(), Vmlo.ZeroExtend<Vec>()};
}
return {concatenate(H, L).ZeroExtend(), concatenate(M, Vmlo).ZeroExtend<Vec>()};
}
enum class ExtraBehavior {
None,
Accumulate,
@ -74,14 +82,7 @@ bool TranslatorVisitor::SQDMULH_elt_1(Imm<2> size, Imm<1> L, Imm<1> M, Imm<4> Vm
}
const size_t esize = 8 << size.ZeroExtend();
const auto [index, Vmhi] = [=] {
if (size == 0b01) {
return std::make_pair(concatenate(H, L, M).ZeroExtend(), Imm<1>{0});
}
return std::make_pair(concatenate(H, L).ZeroExtend(), M);
}();
const Vec Vm = concatenate(Vmhi, Vmlo).ZeroExtend<Vec>();
const auto [index, Vm] = Combine(size, H, L, M, Vmlo);
const IR::UAny operand1 = V_scalar(esize, Vn);
const IR::UAny operand2 = ir.VectorGetElement(esize, V(128, Vm), index);