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A64: Implement SCVTF, UCVTF (vector, fixed-point), scalar variant

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This commit is contained in:
MerryMage 2018-09-19 20:09:59 +01:00
parent 03ad2072a7
commit 09bf273bc8
2 changed files with 42 additions and 11 deletions
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4
src/frontend/A64/decoder/a64.inc
View file

@ -473,7 +473,7 @@ INST(SHL_1, "SHL", "01011
//INST(SQSHL_imm_1, "SQSHL (immediate)", "010111110IIIIiii011101nnnnnddddd")
//INST(SQSHRN_1, "SQSHRN, SQSHRN2", "010111110IIIIiii100101nnnnnddddd")
//INST(SQRSHRN_1, "SQRSHRN, SQRSHRN2", "010111110IIIIiii100111nnnnnddddd")
//INST(SCVTF_fix_1, "SCVTF (vector, fixed-point)", "010111110IIIIiii111001nnnnnddddd")
INST(SCVTF_fix_1, "SCVTF (vector, fixed-point)", "010111110IIIIiii111001nnnnnddddd")
INST(FCVTZS_fix_1, "FCVTZS (vector, fixed-point)", "010111110IIIIiii111111nnnnnddddd")
INST(USHR_1, "USHR", "011111110IIIIiii000001nnnnnddddd")
INST(USRA_1, "USRA", "011111110IIIIiii000101nnnnnddddd")
@ -487,7 +487,7 @@ INST(SLI_1, "SLI", "01111
//INST(SQRSHRUN_1, "SQRSHRUN, SQRSHRUN2", "011111110IIIIiii100011nnnnnddddd")
//INST(UQSHRN_1, "UQSHRN, UQSHRN2", "011111110IIIIiii100101nnnnnddddd")
//INST(UQRSHRN_1, "UQRSHRN, UQRSHRN2", "011111110IIIIiii100111nnnnnddddd")
//INST(UCVTF_fix_1, "UCVTF (vector, fixed-point)", "011111110IIIIiii111001nnnnnddddd")
INST(UCVTF_fix_1, "UCVTF (vector, fixed-point)", "011111110IIIIiii111001nnnnnddddd")
INST(FCVTZU_fix_1, "FCVTZU (vector, fixed-point)", "011111110IIIIiii111111nnnnnddddd")
// Data Processing - FP and SIMD - SIMD Scalar x indexed element

45
src/frontend/A64/translate/impl/simd_scalar_shift_by_immediate.cpp
View file

@ -4,6 +4,7 @@
* General Public License version 2 or any later version.
*/
#include "common/fp/rounding_mode.h"
#include "frontend/A64/translate/impl/impl.h"
namespace Dynarmic::A64 {
@ -18,6 +19,11 @@ enum class Signedness {
Unsigned,
};
enum class FloatConversionDirection {
FixedToFloat,
FloatToFixed,
};
bool ShiftRight(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd,
ShiftExtraBehavior behavior, Signedness signedness) {
if (!immh.Bit<3>()) {
@ -121,7 +127,7 @@ bool ShiftAndInsert(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Vec Vn, Vec
return true;
}
bool ScalarFPConvertWithRound(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd, Signedness sign) {
bool ScalarFPConvertWithRound(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd, Signedness sign, FloatConversionDirection direction, FP::RoundingMode rounding_mode) {
const u32 immh_value = immh.ZeroExtend();
if ((immh_value & 0b1110) == 0b0000) {
@ -139,15 +145,32 @@ bool ScalarFPConvertWithRound(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Ve
const IR::U32U64 operand = v.V_scalar(esize, Vn);
const IR::U32U64 result = [&]() -> IR::U32U64 {
switch (direction) {
case FloatConversionDirection::FloatToFixed:
if (esize == 64) {
return sign == Signedness::Signed
? v.ir.FPToFixedS64(operand, fbits, FP::RoundingMode::TowardsZero)
: v.ir.FPToFixedU64(operand, fbits, FP::RoundingMode::TowardsZero);
? v.ir.FPToFixedS64(operand, fbits, rounding_mode)
: v.ir.FPToFixedU64(operand, fbits, rounding_mode);
}
return sign == Signedness::Signed
? v.ir.FPToFixedS32(operand, fbits, FP::RoundingMode::TowardsZero)
: v.ir.FPToFixedU32(operand, fbits, FP::RoundingMode::TowardsZero);
? v.ir.FPToFixedS32(operand, fbits, rounding_mode)
: v.ir.FPToFixedU32(operand, fbits, rounding_mode);
case FloatConversionDirection::FixedToFloat:
if (esize == 64) {
return sign == Signedness::Signed
? v.ir.FPSignedFixedToDouble(operand, fbits, rounding_mode)
: v.ir.FPUnsignedFixedToDouble(operand, fbits, rounding_mode);
}
return sign == Signedness::Signed
? v.ir.FPSignedFixedToSingle(operand, fbits, rounding_mode)
: v.ir.FPUnsignedFixedToSingle(operand, fbits, rounding_mode);
}
UNREACHABLE();
return {};
}();
v.V_scalar(esize, Vd, result);
@ -156,11 +179,19 @@ bool ScalarFPConvertWithRound(TranslatorVisitor& v, Imm<4> immh, Imm<3> immb, Ve
} // Anonymous namespace
bool TranslatorVisitor::FCVTZS_fix_1(Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Signed);
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Signed, FloatConversionDirection::FloatToFixed, FP::RoundingMode::TowardsZero);
}
bool TranslatorVisitor::FCVTZU_fix_1(Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Unsigned);
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Unsigned, FloatConversionDirection::FloatToFixed, FP::RoundingMode::TowardsZero);
}
bool TranslatorVisitor::SCVTF_fix_1(Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Signed, FloatConversionDirection::FixedToFloat, ir.current_location->FPCR().RMode());
}
bool TranslatorVisitor::UCVTF_fix_1(Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return ScalarFPConvertWithRound(*this, immh, immb, Vn, Vd, Signedness::Unsigned, FloatConversionDirection::FixedToFloat, ir.current_location->FPCR().RMode());
}
bool TranslatorVisitor::SLI_1(Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {