Cmpltdp – Texas Instruments TMS320C67X/C67X+ DSP User Manual
Page 158
CMPLTDP
Compare for Less Than, Double-Precision Floating-Point Values
3-98
Instruction Set
SPRU733
Compare for Less Than, Double-Precision Floating-Point Values
CMPLTDP
Syntax
CMPLTDP (.unit) src1, src2, dst
.unit = .S1 or .S2
Compatibility
C67x and C67x+ CPU
Opcode
31
29
28
27
23
22
18
17
13
12
11
6
5
4
3
2
1
0
creg
z
dst
src2
src1
x 1 0 1 0 1 0 1 0 0 0 s p
3
1
5
5
5
1
1
1
Opcode map field used...
For operand type...
Unit
src1
src2
dst
dp
xdp
sint
.S1, .S2
Description
Compares src1 to src2. If src1 is less than src2, then 1 is written to dst; other-
wise, 0 is written to dst.
Execution
if (cond)
{
if (src1 t src2) 1 → dst
else 0 → dst
}
else
nop
Special cases of inputs:
Input
FAUCR Bits
src1
src2
Output
UNORD
INVAL
NaN
don’t care
0
1
1
don’t care
NaN
0
1
1
NaN
NaN
0
1
1
+/−denormalized
+/−0
0
0
0
+/−0
+/−denormalized
0
0
0
+/−0
+/−0
0
0
0
+/−denormalized +/−denormalized
0
0
0
+infinity
+infinity
0
0
0
+infinity
other
0
0
0
−infinity
−infinity
0
0
0
−infinity
other
1
0
0