Cmpi; Table 9-12. Extended Mnemonics For Cmpi - IBM PPC440X5 CPU Core User Manual

Preliminary

cmpi

Compare Immediate
cmpi BF, 0, RA, IM
11
0 6
4
c 0
0:3
if (RA) < EXTS(IM) then c
if (RA) > EXTS(IM) then c
if (RA) = EXTS(IM) then c
c XER[SO]
3
n BF
CR[CRn] c
0:3
The IM field is sign-extended to 32 bits. The contents of register RA are compared with the extended IM field,
using a 32-bit signed compare.
The CR field specified by the BF field is updated to reflect the results of the compare and the value of
XER[SO] is placed into the same CR field.
Registers Altered
n ] where n is specified by the BF field
• CR[CR
Invalid Instruction Forms
• Reserved fields
Programming Note
PowerPC Book-E Architecture defines this instruction as cmpi BF,L,RA,IM, where L selects operand size for
64-bit implementations. For all 32-bit implementations, L = 0 is required (L = 1 is an invalid form); hence for
the PPC440x5 core, use of the extended mnemonic cmpwi BF,RA,IM is recommended.

Table 9-12. Extended Mnemonics for cmpi

Mnemonic Operands
cmpwi
[BF,] RA, IM
instrset.fm.
September 12, 2002
BF RA
9 11
1
0
1
1
1
2
Compare Word Immediate.
Use CR0 if BF is omitted.
Extended mnemonic for
cmpi BF,0,RA,IM
PPC440x5 CPU Core User's Manual
16
Function
cmpi
Compare Immediate
IM
Other Registers
Altered
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