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Merge pull request #456 from lioncash/mov

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A64: Enable FMOV (general) for half-precision floating point
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Merry 2019-03-22 22:27:48 +00:00 committed by MerryMage
commit f01afc5ae6
1 changed files with 21 additions and 22 deletions
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33
src/frontend/A64/translate/impl/floating_point_conversion_integer.cpp
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@ -62,32 +62,31 @@ bool TranslatorVisitor::FMOV_float_gen(bool sf, Imm<2> type, Imm<1> rmode_0, Imm
// opcode<2:1> == 0b11 // opcode<2:1> == 0b11
// rmode<1> == 0b0 // rmode<1> == 0b0
if (type == 0b10 && rmode_0 != 1) {
return UnallocatedEncoding();
}
const size_t intsize = sf ? 64 : 32; const size_t intsize = sf ? 64 : 32;
size_t fltsize; size_t fltsize = [type] {
switch (type.ZeroExtend()) { switch (type.ZeroExtend()) {
case 0b00: case 0b00:
fltsize = 32; return 32;
break;
case 0b01: case 0b01:
fltsize = 64; return 64;
break;
case 0b10: case 0b10:
if (rmode_0 != 1) { return 128;
return UnallocatedEncoding();
}
fltsize = 128;
break;
default:
case 0b11: case 0b11:
fltsize = 16; return 16;
return UnallocatedEncoding(); default:
UNREACHABLE();
return 0;
} }
}();
bool integer_to_float; bool integer_to_float;
size_t part; size_t part;
switch (rmode_0.ZeroExtend()) { switch (rmode_0.ZeroExtend()) {
case 0b0: case 0b0:
// fltsize != 16 is always true for now (late 2018), until half-float support is implemented.
if (fltsize != 16 && fltsize != intsize) { if (fltsize != 16 && fltsize != intsize) {
return UnallocatedEncoding(); return UnallocatedEncoding();
} }
@ -106,11 +105,11 @@ bool TranslatorVisitor::FMOV_float_gen(bool sf, Imm<2> type, Imm<1> rmode_0, Imm
} }
if (integer_to_float) { if (integer_to_float) {
IR::U32U64 intval = X(intsize, static_cast<Reg>(n)); const IR::U16U32U64 intval = X(fltsize, static_cast<Reg>(n));
Vpart_scalar(fltsize, static_cast<Vec>(d), part, intval); Vpart_scalar(fltsize, static_cast<Vec>(d), part, intval);
} else { } else {
IR::UAny fltval = Vpart_scalar(fltsize, static_cast<Vec>(n), part); const IR::UAny fltval = Vpart_scalar(fltsize, static_cast<Vec>(n), part);
IR::U32U64 intval = ZeroExtend(fltval, intsize); const IR::U32U64 intval = ZeroExtend(fltval, intsize);
X(intsize, static_cast<Reg>(d), intval); X(intsize, static_cast<Reg>(d), intval);
} }