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A64: Implement FMLA and FMLS (by element)'s double/single-precision scalar variant

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Lioncash 2018-07-22 19:13:10 -04:00 committed by MerryMage
parent c704acafe4
commit 49c7edf7c6
3 changed files with 44 additions and 12 deletions
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4
src/frontend/A64/decoder/a64.inc
View file

@ -500,9 +500,9 @@ INST(FCVTZU_fix_1, "FCVTZU (vector, fixed-point)", "01111
//INST(SQDMULH_elt_1, "SQDMULH (by element)", "01011111zzLMmmmm1100H0nnnnnddddd")
//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(FMLA_elt_2, "FMLA (by element)", "010111111zLMmmmm0001H0nnnnnddddd")
//INST(FMLS_elt_1, "FMLS (by element)", "0101111100LMmmmm0101H0nnnnnddddd")
//INST(FMLS_elt_2, "FMLS (by element)", "010111111zLMmmmm0101H0nnnnnddddd")
INST(FMLS_elt_2, "FMLS (by element)", "010111111zLMmmmm0101H0nnnnnddddd")
//INST(FMUL_elt_1, "FMUL (by element)", "0101111100LMmmmm1001H0nnnnnddddd")
INST(FMUL_elt_2, "FMUL (by element)", "010111111zLMmmmm1001H0nnnnnddddd")
//INST(SQRDMLAH_elt_1, "SQRDMLAH (by element)", "01111111zzLMmmmm1101H0nnnnnddddd")

8
src/frontend/A64/translate/impl/impl.h
View file

@ -662,10 +662,10 @@ struct TranslatorVisitor final {
bool SQDMULL_elt_1(Imm<2> size, bool L, bool M, Vec Vm, bool H, Reg Rn, Vec Vd);
bool SQDMULH_elt_1(Imm<2> size, bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool SQRDMULH_elt_1(Imm<2> size, bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool FMLA_elt_1(bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool FMLA_elt_2(bool sz, bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool FMLS_elt_1(bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool FMLS_elt_2(bool sz, bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);
bool FMLA_elt_1(Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool FMLA_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool FMLS_elt_1(Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool FMLS_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool FMUL_elt_1(Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool FMUL_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd);
bool SQRDMLAH_elt_1(Imm<2> size, bool L, bool M, Vec Vm, bool H, Vec Vn, Vec Vd);

44
src/frontend/A64/translate/impl/simd_scalar_x_indexed_element.cpp
View file

@ -7,10 +7,17 @@
#include "frontend/A64/translate/impl/impl.h"
namespace Dynarmic::A64 {
namespace {
enum class ExtraBehavior {
None,
Accumulate,
Subtract
};
bool TranslatorVisitor::FMUL_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
bool MultiplyByElement(TranslatorVisitor& v, bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H,
Vec Vn, Vec Vd, ExtraBehavior extra_behavior) {
if (sz && L == 1) {
return UnallocatedEncoding();
return v.UnallocatedEncoding();
}
const size_t idxdsize = H == 1 ? 128 : 64;
@ -18,12 +25,37 @@ bool TranslatorVisitor::FMUL_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm
const Vec Vm = concatenate(M, Vmlo).ZeroExtend<Vec>();
const size_t esize = sz ? 64 : 32;
const IR::U32U64 operand = V_scalar(esize, Vn);
const IR::U32U64 element = ir.VectorGetElement(esize, V(idxdsize, Vm), index);
const IR::U32U64 result = ir.FPMul(operand, element, true);
const IR::U32U64 element = v.ir.VectorGetElement(esize, v.V(idxdsize, Vm), index);
const IR::U32U64 result = [&] {
IR::U32U64 operand1 = v.V_scalar(esize, Vn);
V_scalar(esize, Vd, result);
if (extra_behavior == ExtraBehavior::None) {
return v.ir.FPMul(operand1, element, true);
}
if (extra_behavior == ExtraBehavior::Subtract) {
operand1 = v.ir.FPNeg(operand1);
}
const IR::U32U64 operand2 = v.V_scalar(esize, Vd);
return v.ir.FPMulAdd(operand2, operand1, element, true);
}();
v.V_scalar(esize, Vd, result);
return true;
}
} // Anonymous namespace
bool TranslatorVisitor::FMLA_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
return MultiplyByElement(*this, sz, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::Accumulate);
}
bool TranslatorVisitor::FMLS_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
return MultiplyByElement(*this, sz, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::Subtract);
}
bool TranslatorVisitor::FMUL_elt_2(bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
return MultiplyByElement(*this, sz, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::None);
}
} // namespace Dynarmic::A64