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frontend/ir/ir_emitter: Alter parameters of FPDoubleToSingle() and FPSingleToDouble() to pass along desired rounding mode

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This will be necessary to special-case the non-IEEE Von Neumann rounding
to odd rounding mode.
This commit is contained in:
Lioncash 2019-03-04 10:44:17 -05:00 • committed by MerryMage
parent 95af9dafbe
commit 7c81a58ed3
7 changed files with 52 additions and 29 deletions
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6
src/frontend/A64/translate/impl/simd_two_register_misc.cpp
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@ -348,10 +348,11 @@ bool TranslatorVisitor::FCVTL(bool Q, bool sz, Vec Vn, Vec Vd) {
}
const IR::U128 part = Vpart(64, Vn, Q);
const auto rounding_mode = ir.current_location->FPCR().RMode();
IR::U128 result = ir.ZeroVector();
for (size_t i = 0; i < 2; i++) {
const IR::U64 element = ir.FPSingleToDouble(ir.VectorGetElement(32, part, i), true);
const IR::U64 element = ir.FPSingleToDouble(ir.VectorGetElement(32, part, i), rounding_mode);
result = ir.VectorSetElement(64, result, i, element);
}
@ -367,10 +368,11 @@ bool TranslatorVisitor::FCVTN(bool Q, bool sz, Vec Vn, Vec Vd) {
}
const IR::U128 operand = V(128, Vn);
const auto rounding_mode = ir.current_location->FPCR().RMode();
IR::U128 result = ir.ZeroVector();
for (size_t i = 0; i < 2; i++) {
const IR::U32 element = ir.FPDoubleToSingle(ir.VectorGetElement(64, operand, i), true);
const IR::U32 element = ir.FPDoubleToSingle(ir.VectorGetElement(64, operand, i), rounding_mode);
result = ir.VectorSetElement(32, result, i, element);
}