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A64: Implement REV64

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Lioncash 2018-03-23 12:01:42 -04:00 committed by MerryMage
parent ade595e377
commit 586b00d11d
2 changed files with 35 additions and 1 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -565,7 +565,7 @@ INST(INS_elt, "INS (element)", "01101
//INST(FCADD_vec, "FCADD", "0Q101110zz0mmmmm111r01nnnnnddddd")
// Data Processing - FP and SIMD - SIMD Two-register misc
//INST(REV64_asimd, "REV64", "0Q001110zz100000000010nnnnnddddd")
INST(REV64_asimd, "REV64", "0Q001110zz100000000010nnnnnddddd")
INST(REV16_asimd, "REV16 (vector)", "0Q001110zz100000000110nnnnnddddd")
//INST(SADDLP, "SADDLP", "0Q001110zz100000001010nnnnnddddd")
//INST(SUQADD_2, "SUQADD", "0Q001110zz100000001110nnnnnddddd")

34
src/frontend/A64/translate/impl/simd_scalar_two_register_misc.cpp
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@ -55,6 +55,40 @@ bool TranslatorVisitor::REV32_asimd(bool Q, Imm<2> size, Vec Vn, Vec Vd) {
return true;
}
bool TranslatorVisitor::REV64_asimd(bool Q, Imm<2> size, Vec Vn, Vec Vd) {
const u32 zext_size = size.ZeroExtend();
if (zext_size >= 3) {
return UnallocatedEncoding();
}
const size_t datasize = Q ? 128 : 64;
const size_t esize = 16 << zext_size;
const u8 shift = static_cast<u8>(8 << zext_size);
const IR::U128 data = V(datasize, Vn);
// TODO: Consider factoring byte swapping code out into its own opcode.
// Technically the rest of the following code can be a PSHUFB
// in the presence of SSSE3.
IR::U128 result = ir.VectorOr(ir.VectorLogicalShiftRight(esize, data, shift),
ir.VectorLogicalShiftLeft(esize, data, shift));
switch (zext_size) {
case 0: // 8-bit elements
result = ir.VectorShuffleLowHalfwords(result, 0b00011011);
result = ir.VectorShuffleHighHalfwords(result, 0b00011011);
break;
case 1: // 16-bit elements
result = ir.VectorShuffleLowHalfwords(result, 0b01001110);
result = ir.VectorShuffleHighHalfwords(result, 0b01001110);
break;
}
V(datasize, Vd, result);
return true;
}
bool TranslatorVisitor::UCVTF_int_2(bool sz, Vec Vn, Vec Vd) {
const auto esize = sz ? 64 : 32;