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A64: Implement FRECPX's half-precision floating point variant

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Lioncash 2019-03-09 17:39:08 -05:00 committed by MerryMage
parent bd892ec4ef
commit 3a3542414b
2 changed files with 9 additions and 1 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -420,7 +420,7 @@ INST(FCVTPS_2, "FCVTPS (vector)", "01011
INST(FCVTZS_int_2, "FCVTZS (vector, integer)", "010111101z100001101110nnnnnddddd")
//INST(FRECPE_1, "FRECPE", "0101111011111001110110nnnnnddddd")
INST(FRECPE_2, "FRECPE", "010111101z100001110110nnnnnddddd")
//INST(FRECPX_1, "FRECPX", "0101111011111001111110nnnnnddddd")
INST(FRECPX_1, "FRECPX", "0101111011111001111110nnnnnddddd")
INST(FRECPX_2, "FRECPX", "010111101z100001111110nnnnnddddd")
//INST(FCVTNU_1, "FCVTNU (vector)", "0111111001111001101010nnnnnddddd")
INST(FCVTNU_2, "FCVTNU (vector)", "011111100z100001101010nnnnnddddd")

8
src/frontend/A64/translate/impl/simd_scalar_two_register_misc.cpp
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@ -182,6 +182,14 @@ bool TranslatorVisitor::FRECPE_2(bool sz, Vec Vn, Vec Vd) {
return true;
}
bool TranslatorVisitor::FRECPX_1(Vec Vn, Vec Vd) {
const IR::U16 operand = V_scalar(16, Vn);
const IR::U16 result = ir.FPRecipExponent(operand);
V_scalar(16, Vd, result);
return true;
}
bool TranslatorVisitor::FRECPX_2(bool sz, Vec Vn, Vec Vd) {
const size_t esize = sz ? 64 : 32;