sanchayanmaity/gem5
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

X86: Add a media integer min microop.

Browse source
This commit is contained in:
Gabe Black 2009-08-17 20:04:02 -07:00
parent e678df6263
commit e2759fe69c
1 changed files with 38 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

38
src/arch/x86/isa/microops/mediaop.isa
View file

@ -530,6 +530,44 @@ let {{
FpDestReg.uqw = result;
'''
class Mmini(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);
int64_t arg1 = arg1Bits |
(0 - (arg1Bits & (1 << (sizeBits - 1))));
uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex);
int64_t arg2 = arg2Bits |
(0 - (arg2Bits & (1 << (sizeBits - 1))));
uint64_t resBits;
if (ext & 0x2) {
if (arg1 < arg2) {
resBits = arg1Bits;
} else {
resBits = arg2Bits;
}
} else {
if (arg1Bits < arg2Bits) {
resBits = arg1Bits;
} else {
resBits = arg2Bits;
}
}
result = insertBits(result, hiIndex, loIndex, resBits);
}
FpDestReg.uqw = result;
'''
class Msqrt(MediaOp):
def __init__(self, dest, src, \
size = None, destSize = None, srcSize = None, ext = None):