Merge pull request #466 from lioncash/fcmla
A64: Implement FCMLA's indexed element variant
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0b794cbcea
2 changed files with 90 additions and 1 deletions
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@ -896,7 +896,7 @@ INST(UDOT_elt, "UDOT (by element)", "0Q101
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//INST(SQRDMLSH_elt_2, "SQRDMLSH (by element)", "0Q101111zzLMmmmm1111H0nnnnnddddd")
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//INST(SQRDMLSH_elt_2, "SQRDMLSH (by element)", "0Q101111zzLMmmmm1111H0nnnnnddddd")
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//INST(FMULX_elt_3, "FMULX (by element)", "0Q10111100LMmmmm1001H0nnnnnddddd")
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//INST(FMULX_elt_3, "FMULX (by element)", "0Q10111100LMmmmm1001H0nnnnnddddd")
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INST(FMULX_elt_4, "FMULX (by element)", "0Q1011111zLMmmmm1001H0nnnnnddddd")
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INST(FMULX_elt_4, "FMULX (by element)", "0Q1011111zLMmmmm1001H0nnnnnddddd")
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//INST(FCMLA_elt, "FCMLA (by element)", "0Q101111zzLMmmmm0rr1H0nnnnnddddd")
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INST(FCMLA_elt, "FCMLA (by element)", "0Q101111zzLMmmmm0rr1H0nnnnnddddd")
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// Data Processing - FP and SIMD - Cryptographic three register
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// Data Processing - FP and SIMD - Cryptographic three register
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INST(SM3TT1A, "SM3TT1A", "11001110010mmmmm10ii00nnnnnddddd")
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INST(SM3TT1A, "SM3TT1A", "11001110010mmmmm10ii00nnnnnddddd")
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@ -187,6 +187,95 @@ bool TranslatorVisitor::MUL_elt(bool Q, Imm<2> size, Imm<1> L, Imm<1> M, Imm<4>
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return MultiplyByElement(*this, Q, size, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::None);
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return MultiplyByElement(*this, Q, size, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::None);
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}
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}
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bool TranslatorVisitor::FCMLA_elt(bool Q, Imm<2> size, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<2> rot, Imm<1> H, Vec Vn, Vec Vd) {
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if (size == 0b00 || size == 0b11) {
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return ReservedValue();
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}
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if (size == 0b01 && H == 1 && Q == 0) {
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return ReservedValue();
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}
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if (size == 0b10 && (L == 1 || Q == 0)) {
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return ReservedValue();
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}
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const size_t esize = 8U << size.ZeroExtend();
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// TODO: We don't support the half-precision floating point variant yet.
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if (esize == 16) {
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return InterpretThisInstruction();
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}
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const size_t index = [=] {
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if (size == 0b01) {
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return concatenate(H, L).ZeroExtend();
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}
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return H.ZeroExtend();
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}();
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const Vec Vm = concatenate(M, Vmlo).ZeroExtend<Vec>();
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const size_t datasize = Q ? 128 : 64;
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const size_t num_elements = datasize / esize;
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const size_t num_iterations = num_elements / 2;
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const IR::U128 operand1 = V(datasize, Vn);
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const IR::U128 operand2 = V(datasize, Vm);
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const IR::U128 operand3 = V(datasize, Vd);
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IR::U128 result = ir.ZeroVector();
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IR::U32U64 element1;
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IR::U32U64 element2;
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IR::U32U64 element3;
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IR::U32U64 element4;
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for (size_t e = 0; e < num_iterations; ++e) {
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const size_t first = e * 2;
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const size_t second = first + 1;
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const size_t index_first = index * 2;
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const size_t index_second = index_first + 1;
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switch (rot.ZeroExtend()) {
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case 0b00: // 0 degrees
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element1 = ir.VectorGetElement(esize, operand2, index_first);
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element2 = ir.VectorGetElement(esize, operand1, first);
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element3 = ir.VectorGetElement(esize, operand2, index_second);
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element4 = ir.VectorGetElement(esize, operand1, first);
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break;
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case 0b01: // 90 degrees
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element1 = ir.FPNeg(ir.VectorGetElement(esize, operand2, index_second));
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element2 = ir.VectorGetElement(esize, operand1, second);
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element3 = ir.VectorGetElement(esize, operand2, index_first);
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element4 = ir.VectorGetElement(esize, operand1, second);
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break;
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case 0b10: // 180 degrees
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element1 = ir.FPNeg(ir.VectorGetElement(esize, operand2, index_first));
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element2 = ir.VectorGetElement(esize, operand1, first);
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element3 = ir.FPNeg(ir.VectorGetElement(esize, operand2, index_second));
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element4 = ir.VectorGetElement(esize, operand1, first);
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break;
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case 0b11: // 270 degrees
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element1 = ir.VectorGetElement(esize, operand2, index_second);
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element2 = ir.VectorGetElement(esize, operand1, second);
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element3 = ir.FPNeg(ir.VectorGetElement(esize, operand2, index_first));
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element4 = ir.VectorGetElement(esize, operand1, second);
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break;
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}
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const IR::U32U64 operand3_elem1 = ir.VectorGetElement(esize, operand3, first);
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const IR::U32U64 operand3_elem2 = ir.VectorGetElement(esize, operand3, second);
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result = ir.VectorSetElement(esize, result, first,
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ir.FPMulAdd(operand3_elem1, element2, element1, true));
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result = ir.VectorSetElement(esize, result, second,
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ir.FPMulAdd(operand3_elem2, element4, element3, true));
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}
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ir.SetQ(Vd, result);
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return true;
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}
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bool TranslatorVisitor::FMLA_elt_4(bool Q, bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
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bool TranslatorVisitor::FMLA_elt_4(bool Q, bool sz, Imm<1> L, Imm<1> M, Imm<4> Vmlo, Imm<1> H, Vec Vn, Vec Vd) {
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return FPMultiplyByElement(*this, Q, sz, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::Accumulate);
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return FPMultiplyByElement(*this, Q, sz, L, M, Vmlo, H, Vn, Vd, ExtraBehavior::Accumulate);
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}
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}
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