changeset 0143f8c4b2c2 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=0143f8c4b2c2
description:
X86: Implement a microop that moves sign bits.
diffstat:
1 file changed, 17 insertions(+)
src/arch/x86/isa/microops/mediaop.isa | 17 +++++++++++++++++
diffs (27 lines):
diff -r 3d1ea9362fe5 -r 0143f8c4b2c2 src/arch/x86/isa/microops/mediaop.isa
--- a/src/arch/x86/isa/microops/mediaop.isa Mon Aug 17 20:22:56 2009 -0700
+++ b/src/arch/x86/isa/microops/mediaop.isa Mon Aug 17 20:22:56 2009 -0700
@@ -330,6 +330,23 @@
}
'''
+ class Movsign(MediaOp):
+ def __init__(self, dest, src, \
+ size = None, destSize = None, srcSize = None, ext = None):
+ super(Movsign, self).__init__(dest, src,\
+ "InstRegIndex(0)", size, destSize, srcSize, ext)
+ code = '''
+ int items = sizeof(FloatRegBits) / srcSize;
+ uint64_t result = 0;
+ int offset = (ext & 0x1) ? items : 0;
+ for (int i = 0; i < items; i++) {
+ uint64_t picked =
+ bits(FpSrcReg1.uqw, (i + 1) * 8 * srcSize - 1);
+ result = insertBits(result, i + offset, i + offset, picked);
+ }
+ DestReg = DestReg | result;
+ '''
+
class Unpack(MediaOp):
code = '''
assert(srcSize == destSize);
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