diff options
Diffstat (limited to 'src/arch/x86/isa/microops/mediaop.isa')
| -rw-r--r-- | src/arch/x86/isa/microops/mediaop.isa | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa index fe8368707..a933d0204 100644 --- a/src/arch/x86/isa/microops/mediaop.isa +++ b/src/arch/x86/isa/microops/mediaop.isa @@ -759,6 +759,41 @@ let {{ FpDestReg.uqw = result; ''' + class Maddi(MediaOp): + code = ''' + assert(srcSize == destSize); + int size = srcSize; + int sizeBits = size * 8; + int items = (ext & 0x1) ? 1: (sizeof(FloatRegBits) / size); + uint64_t result = FpDestReg.uqw; + + for (int i = 0; i < items; i++) { + int hiIndex = (i + 1) * sizeBits - 1; + int loIndex = (i + 0) * sizeBits; + uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex); + uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex); + uint64_t resBits = arg1Bits + arg2Bits; + + if (ext & 0x2) { + if (findCarry(sizeBits, resBits, arg1Bits, arg2Bits)) + resBits = mask(sizeBits); + } else if (ext & 0x4) { + int arg1Sign = bits(arg1Bits, sizeBits - 1); + int arg2Sign = bits(arg2Bits, sizeBits - 1); + int resSign = bits(resBits, sizeBits - 1); + if ((arg1Sign == arg2Sign) && (arg1Sign != resSign)) { + if (resSign == 0) + resBits = (1 << (sizeBits - 1)); + else + resBits = mask(sizeBits - 1); + } + } + + result = insertBits(result, hiIndex, loIndex, resBits); + } + FpDestReg.uqw = result; + ''' + class Cvti2f(MediaOp): def __init__(self, dest, src, \ size = None, destSize = None, srcSize = None, ext = None): |