changeset 1cb6f8b427c0 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=1cb6f8b427c0
description:
X86: Implement a media average microop.
diffstat:
1 file changed, 20 insertions(+)
src/arch/x86/isa/microops/mediaop.isa | 20 ++++++++++++++++++++
diffs (30 lines):
diff -r e8af0cf94c37 -r 1cb6f8b427c0 src/arch/x86/isa/microops/mediaop.isa
--- a/src/arch/x86/isa/microops/mediaop.isa Mon Aug 17 20:15:16 2009 -0700
+++ b/src/arch/x86/isa/microops/mediaop.isa Mon Aug 17 20:15:16 2009 -0700
@@ -955,6 +955,26 @@
FpDestReg.uqw = result;
'''
+ class Mavg(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 + 1) / 2;
+
+ result = insertBits(result, hiIndex, loIndex, resBits);
+ }
+ FpDestReg.uqw = result;
+ '''
+
class Msad(MediaOp):
code = '''
int srcBits = srcSize * 8;
_______________________________________________
m5-dev mailing list
[email protected]
http://m5sim.org/mailman/listinfo/m5-dev
