Citra-emu/dynarmic
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

A64 Emitter: Implement Saturating Add and Sub

Browse Source
This commit is contained in:
SachinVin 2019-07-21 12:36:18 +05:30 committed by xperia64
parent 2f9f317c9e
commit 1a03e361c3
2 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/backend/A64/emitter/a64_emitter.cpp
View File

@ -1992,6 +1992,17 @@ void ARM64FloatEmitter::EmitThreeSame(bool U, u32 size, u32 opcode, ARM64Reg Rd,
(opcode << 11) | (1 << 10) | (Rn << 5) | Rd);
}
void ARM64FloatEmitter::EmitScalarThreeSame(bool U, u32 size, u32 opcode, ARM64Reg Rd, ARM64Reg Rn,
ARM64Reg Rm) {
ASSERT_MSG(!IsQuad(Rd), "%s doesn't support quads!", __func__);
Rd = DecodeReg(Rd);
Rn = DecodeReg(Rn);
Rm = DecodeReg(Rm);
Write32((U << 29) | (0b1011110001 << 21) | (size << 22) | (Rm << 16) |
(opcode << 11) | (1 << 10) | (Rn << 5) | Rd);
}
void ARM64FloatEmitter::EmitCopy(bool Q, u32 op, u32 imm5, u32 imm4, ARM64Reg Rd, ARM64Reg Rn) {
Rd = DecodeReg(Rd);
Rn = DecodeReg(Rn);
@ -2787,6 +2798,20 @@ void ARM64FloatEmitter::EmitScalar3Source(bool isDouble, ARM64Reg Rd, ARM64Reg R
(Ra << 10) | (Rn << 5) | Rd);
}
// Scalar three same
void ARM64FloatEmitter::SQADD(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm) {
EmitScalarThreeSame(0, static_cast<u32>(esize), 0b000011, Rd, Rn, Rm);
}
void ARM64FloatEmitter::SQSUB(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm) {
EmitScalarThreeSame(0, static_cast<u32>(esize), 0b001011, Rd, Rn, Rm);
}
void ARM64FloatEmitter::UQADD(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm) {
EmitScalarThreeSame(1, static_cast<u32>(esize), 0b000011, Rd, Rn, Rm);
}
void ARM64FloatEmitter::UQSUB(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm) {
EmitScalarThreeSame(1, static_cast<u32>(esize), 0b001011, Rd, Rn, Rm);
}
// Scalar floating point immediate
void ARM64FloatEmitter::FMOV(ARM64Reg Rd, uint8_t imm8) {
EmitScalarImm(0, 0, 0, 0, Rd, imm8);

14
src/backend/A64/emitter/a64_emitter.h
View File

@ -295,6 +295,14 @@ enum RoundingMode {
ROUND_Z, // round towards zero
};
// Size of each element in the Vector
enum ESize {
B, // Byte
H, // Half Word
S, // Single Word
D, // Double Word
};
struct FixupBranch {
u8* ptr;
// Type defines
@ -945,6 +953,12 @@ public:
void FNMADD(ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm, ARM64Reg Ra);
void FNMSUB(ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm, ARM64Reg Ra);
// Scalar three same
void SQADD(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm);
void UQADD(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm);
void SQSUB(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm);
void UQSUB(ESize esize, ARM64Reg Rd, ARM64Reg Rn, ARM64Reg Rm);
// Scalar floating point immediate
void FMOV(ARM64Reg Rd, uint8_t imm8);