PowerPC e500 Core Family Reference Manual, Rev. 1
Freescale Semiconductor B-1
Appendix B
Guidelines for 32-Bit Book E
This appendix provides guidelines used by 32-bit Book E implementations. Likewise, a set of
guidelines is also outlined for software developers. Application software written to these
guidelines can be labelled 32-bit Book E applications and can expect to execute properly on all
implementations of Book E, both 32-bit and 64-bit implementations.
32-bit Book E implementations execute applications that adhere to the software guidelines for
32-bit Book E software outlined in this appendix and are not expected to properly execute 64-bit
Book E applications or any applications not adhering to these guidelines (that is, 64-bit Book E
applications).
B.1 64-Bit–Specific Book E Instructions
A subset of Book E instructions are restricted to 64-bit Book E processing. A 32-bit Book E
implementation need not implement any of the following instructions. Likewise, neither should
32-bit Book E applications use any of these instructions. All other Book E instructions are either
supported directly by the implementation or sufficient infrastructure is provided to enable software
emulation of the instructions.
The 64-bit Book E instructions are as follows:
• 64-bit integer arithmetic, compare, shift and rotate instructions
— adde64[o], addme64[o], addze64[o]
— subfe64[o], subfme64[o], subfze64[o]
— mulhd, mulhdu, mulld[o], divd, divdu, extsw
— cmp (L=1), cmpi (L=1), cmpl (L=1), cmpli (L=1)
— rldcl, rldcr, rldic, rldicl, rldicr, rldimi, sld, srad, sradi, srd
— cntlzd, td, tdi
• 64-bit extended addressing branch instructions—bcctre[l], bce[l][a], bclre[l], be
[l][a]
• 64-bit extended addressing cache management instructions—dcbae, dcbfe, dcbie, dcbste,
dcbte, dcbtste, dcbze, icbie, icbte
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