diff options
| author | gdk <gab.dark.100@gmail.com> | 2019-10-13 03:02:07 -0300 |
|---|---|---|
| committer | Thog <thog@protonmail.com> | 2020-01-09 02:13:00 +0100 |
| commit | 1876b346fea647e8284a66bb6d62c38801035cff (patch) | |
| tree | 6eeff094298cda84d1613dc5ec0691e51d7b35f1 /Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs | |
| parent | f617fb542a0e3d36012d77a4b5acbde7b08902f2 (diff) | |
Initial work
Diffstat (limited to 'Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs')
| -rw-r--r-- | Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs b/Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs new file mode 100644 index 00000000..77cd1bf7 --- /dev/null +++ b/Ryujinx.Graphics.Shader/Decoders/DecoderHelper.cs @@ -0,0 +1,58 @@ +using System; + +namespace Ryujinx.Graphics.Shader.Decoders +{ + static class DecoderHelper + { + public static int DecodeS20Immediate(long opCode) + { + int imm = opCode.Extract(20, 19); + + bool sign = opCode.Extract(56); + + if (sign) + { + imm = (imm << 13) >> 13; + } + + return imm; + } + + public static int Decode2xF10Immediate(long opCode) + { + int immH0 = opCode.Extract(20, 9); + int immH1 = opCode.Extract(30, 9); + + bool negateH0 = opCode.Extract(29); + bool negateH1 = opCode.Extract(56); + + if (negateH0) + { + immH0 |= 1 << 9; + } + + if (negateH1) + { + immH1 |= 1 << 9; + } + + return immH1 << 22 | immH0 << 6; + } + + public static float DecodeF20Immediate(long opCode) + { + int imm = opCode.Extract(20, 19); + + bool negate = opCode.Extract(56); + + imm <<= 12; + + if (negate) + { + imm |= 1 << 31; + } + + return BitConverter.Int32BitsToSingle(imm); + } + } +}
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