Texas Instruments TMS320C6000 Series Reference Manual page 213

CMPEQDP
Double-Precision Floating-Point Compare for Equality
Syntax
Opcode
31 29 28 27
creg z dst
3 5
Description
Execution
4-28
CMPEQDP (.unit) src1 , src2 , dst
.unit = .S1 or .S2
Opcode map field used...
src1
src2
dst
23 22 18 17
src2
5
This instruction compares src1 to src2 . If src1 equals src2 , 1 is written to dst .
Otherwise, 0 is written to dst .
if (cond) {
if ( src1 == src2 ) 1
else 0 dst
}
else nop
Special cases of inputs:
Input
src1
NaN don't care
don't care
NaN
+/–denormalized
+/–0 +/–denormalized
+/–0
+/–denormalized +/–denormalized
+infinity
+infinity
–infinity
–infinity
For operand type...
dp
xdp
sint
13 12 11
src1 x
1 0 1 0 0 0
5
dst
src2
Output
0
NaN 0
NaN 0
+/–0 1
1
+/–0 1
1
+infinity 1
other 0
–infinity 1
other 0
Unit
.S1, .S2
6 5 4 3 2
1 0 0 0
6
FAUCR Fields
UNORD INVAL
1
1
1
0
0
0
0
0
0
0
0
1 0
s p
0
0
0
0
0
0
0
0
0
0
0