Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 227)

Multiply Two Single-Precision Floating-Point Values MPYSP
3-167 Instruction Set SPRU733
Pipeline
Stage
E1 E2 E3 E4
Read src1
src2
Written dst
Unit in use .M
If dst is used as the source for the ADDDP, CMPEQDP, CMPLTDP,
CMPGTDP, MPYDP, or SUBDP instruction, the number of delay slots can be
reduced by one, because these instructions read the lower word of the DP
source one cycle before the upper word of the DP source.
Instruction Type 4-cycle
Delay Slots 3
Functional Unit
Latency 1
See Also MPY, MPYDP, MPYSP2DP
Example MPYSP .M1X A1,B2,A3
Before instruction 4 cycles after instruction
A1 C020 0000h −2.5 A1 C020 0000h −2.5
B2 4109 999Ah 8.6 B2 4109 999Ah 8.6
A3 xxxx xxxxh A3 C1AC 0000h −21.5
Pipeline