diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86/isa/microops/mediaop.isa | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa index a5371474e..7e03fcba3 100644 --- a/src/arch/x86/isa/microops/mediaop.isa +++ b/src/arch/x86/isa/microops/mediaop.isa @@ -308,4 +308,30 @@ let {{ FpDestReg.uqw = insertBits(FpDestReg.uqw, destSize * 8 - 1, 0, srcReg1); ''' + + class Unpack(MediaOp): + code = ''' + assert(srcSize == destSize); + int size = destSize; + int items = (sizeof(FloatRegBits) / size) / 2; + int offset = sel ? items : 0; + uint64_t result = 0; + for (int i = 0; i < items; i++) { + uint64_t pickedLow = + bits(FpSrcReg1.uqw, (i + offset + 1) * 8 * size - 1, + (i + offset) * 8 * size); + result = insertBits(result, + (2 * i + 1) * 8 * size - 1, + (2 * i + 0) * 8 * size, + pickedLow); + uint64_t pickedHigh = + bits(FpSrcReg2.uqw, (i + offset + 1) * 8 * size - 1, + (i + offset) * 8 * size); + result = insertBits(result, + (2 * i + 2) * 8 * size - 1, + (2 * i + 1) * 8 * size, + pickedHigh); + } + FpDestReg.uqw = result; + ''' }}; |