diff options
| author | TSR Berry <20988865+TSRBerry@users.noreply.github.com> | 2023-04-08 01:22:00 +0200 |
|---|---|---|
| committer | Mary <thog@protonmail.com> | 2023-04-27 23:51:14 +0200 |
| commit | cee712105850ac3385cd0091a923438167433f9f (patch) | |
| tree | 4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /ARMeilleure/Decoders/OpCodeSimdHelper.cs | |
| parent | cd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff) | |
Move solution and projects to src
Diffstat (limited to 'ARMeilleure/Decoders/OpCodeSimdHelper.cs')
| -rw-r--r-- | ARMeilleure/Decoders/OpCodeSimdHelper.cs | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/ARMeilleure/Decoders/OpCodeSimdHelper.cs b/ARMeilleure/Decoders/OpCodeSimdHelper.cs deleted file mode 100644 index 02f74d03..00000000 --- a/ARMeilleure/Decoders/OpCodeSimdHelper.cs +++ /dev/null @@ -1,88 +0,0 @@ -namespace ARMeilleure.Decoders -{ - public static class OpCodeSimdHelper - { - public static (long Immediate, int Size) GetSimdImmediateAndSize(int cMode, int op, long imm) - { - int modeLow = cMode & 1; - int modeHigh = cMode >> 1; - int size = 0; - - if (modeHigh == 0b111) - { - switch (op | (modeLow << 1)) - { - case 0: - // 64-bits Immediate. - // Transform abcd efgh into abcd efgh abcd efgh ... - size = 3; - imm = (long)((ulong)imm * 0x0101010101010101); - break; - - case 1: - // 64-bits Immediate. - // Transform abcd efgh into aaaa aaaa bbbb bbbb ... - size = 3; - imm = (imm & 0xf0) >> 4 | (imm & 0x0f) << 4; - imm = (imm & 0xcc) >> 2 | (imm & 0x33) << 2; - imm = (imm & 0xaa) >> 1 | (imm & 0x55) << 1; - - imm = (long)((ulong)imm * 0x8040201008040201); - imm = (long)((ulong)imm & 0x8080808080808080); - - imm |= imm >> 4; - imm |= imm >> 2; - imm |= imm >> 1; - break; - - case 2: - // 2 x 32-bits floating point Immediate. - size = 3; - imm = (long)DecoderHelper.Imm8ToFP32Table[(int)imm]; - imm |= imm << 32; - break; - - case 3: - // 64-bits floating point Immediate. - size = 3; - imm = (long)DecoderHelper.Imm8ToFP64Table[(int)imm]; - break; - } - } - else if ((modeHigh & 0b110) == 0b100) - { - // 16-bits shifted Immediate. - size = 1; imm <<= (modeHigh & 1) << 3; - } - else if ((modeHigh & 0b100) == 0b000) - { - // 32-bits shifted Immediate. - size = 2; imm <<= modeHigh << 3; - } - else if ((modeHigh & 0b111) == 0b110) - { - // 32-bits shifted Immediate (fill with ones). - size = 2; imm = ShlOnes(imm, 8 << modeLow); - } - else - { - // 8-bits without shift. - size = 0; - } - - return (imm, size); - } - - private static long ShlOnes(long value, int shift) - { - if (shift != 0) - { - return value << shift | (long)(ulong.MaxValue >> (64 - shift)); - } - else - { - return value; - } - } - } -} |
