RM0004 Datasheet, PDF(510/1176 Page) STMicroelectronics – Programmer’s reference manual for Book E processors

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

RM0004 Datasheet, PDF (510/1176 Pages) STMicroelectronics – Programmer’s reference manual for Book E processors

◁

RM0004

Instruction set

evfststeq

Vector SPFP APU User

Vector floating-point single-precision test equal

evfststeq

crfD,rA,rB

evfststeq

0

56

8 9 10 11

15 16

20 21

31

0 0 0 1 0 0 crfD 0 0

rA

rB

010 1001 1110

ah â rA0:31

al â rA32:63

bh â rB0:31

bl â rB32:63

if (ah = bh) then ch â 1

else ch â 0

if (al = bl) then cl â 1

else cl â 0

CR4*crD:4*crD+3 â ch || cl || (ch | cl) || (ch & cl)

Each element of rA is compared against the corresponding element of rB. If rA equals rB,

the bit in crfD is set, otherwise it is cleared. Comparison ignores the sign of 0 (+0 = â0). The

comparison proceeds after treating NaNs, Infinities, and Denorms as normalized numbers,

using their values of âeâ and âfâ directly.

No exceptions are taken during the execution of evfststeq. If strict IEEE 754 compliance is

required, the program should use evfscmpeq.

Implementation note: In an implementation, the execution of evfststeq is likely to be faster

than the execution of evfscmpeq.

510/1176

▷