Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 167)

Convert Double-Precision Floating-Point Value to Single-Precision Floating-Point Value DPSP
3-107 Instruction Set SPRU733
7) If underflow occurs, the INEX and UNDER bits are set and the results
are set as follows (SPFN is the smallest floating-point number):
Underflow Output Rounding Mode
Result Sign Nearest Even Zero +Infinity −Infinity
+ +0 +0 +SFPN +0
− −0 −0 −0 −SFPN
Pipeline
Stage
E1 E2 E3 E4
Read src2_l
src2_h
Written dst
Unit in use .L
Instruction Type 4-cycle
Delay Slots 3
Functional Unit
Latency 1
See Also DPINT, DPTRUNC, INTSP, SPDP
Example DPSP .L1 A1:A0,A4
Before instruction 4 cycles after instruction
A1:A0 4021 3333h 3333 3333h 8.6 A1:A0 4021 3333h 4021 3333h 8.6
A4 xxxx xxxxh A4 4109 999Ah 8.6
Pipeline