Macchwu - IBM PPC440X5 CPU Core User Manual

macchwu

Multiply Accumulate Cross Halfword to Word Modulo Unsigned
PPC440x5 CPU Core User's Manual
macchwu
Multiply Accumulate Cross Halfword to Word Modulo Unsigned
macchwu RT, RA, RB
macchwu. RT, RA, RB
macchwuo RT, RA, RB
macchwuo. RT, RA, RB
4
0 6
prod (RA)
0:31 16:31
temp prod + (RT)
0:32 0:31
(RT) temp
1:32
The low-order halfword of RA is multiplied by the high-order halfword of RB. The unsigned product is
summed with the contents of RT and RT is updated with the low-order 32 bits of the unsigned sum.
Registers Altered
• RT
• CR[CR0] if Rc contains 1
• XER[SO, OV] if OE contains 1
Architecture Note
This instruction is implementation-specific and programs which use this instruction may not be portable to
other PowerPC Book-E implementations. See Instruction Set Portability on page 250.
Page 348 of 589
OE=0, Rc=0
OE=0, Rc=1
OE=1, Rc=0
OE=1, Rc=1
RT RA
11
(RB) unsigned
0:15
RB OE
16 21 22
Preliminary
140 Rc
31
instrset.fm.
September 12, 2002