Dp Compare Instructions 6; Intdp Instruction Phases; Dp Compare Instruction Phases; Intdp Execution - Texas Instruments TMS320C6000 Series Reference Manual

Functional Unit Hazards
Table 6–27. INTDP Execution
Figure 6–20. INTDP Instruction Phases
PG
6.3.13 DP Compare Instructions
Table 6–28. DP Compare Execution
Figure 6–21. DP Compare Instruction Phases
6-48
Pipeline
Stage E1
Read src2
Written
Unit in use .L
PS PW PR DP
The DP compare instructions use the E1 and E2 phases of the pipeline to com-
plete their operations (see Table 6–28). The lower 32 bits of the sources are
read on E1, the upper 32 bits of the sources are read on E2, and the results
are written on E2. The following instructions are DP compare instructions:
CMPEQDP
CMPLTDP
CMPGTDP
The DP compare instructions are executed on the .S unit. The functional unit
latency for DP compare instructions is 2. The status is written to the FAUCR
on E2. Figure 6–21 shows the pipeline phases the DP compare instructions
use.
Pipeline
Stage
Read
Written
Unit in use
PG PS
E2
DC E1 E2
E1
src1_l
src2_l
.S
PW PR DP DC
E3 E4
dst_l
E3 E4 E5
4 delay slots
E2
src1_h
src2_h
dst
.S
1
delay
E1 E2
slot
E5
dst_h