The following table lists the POWER family and PowerPC instructions that share the same op code on POWER family and PowerPC platforms, but differ in their functional definition. Use caution when using these instructions in com assembly mode.
| POWER family | PowerPC | Description |
|---|---|---|
| dcs | sync | The sync instruction causes more pervasive synchronization in PowerPC than the dcs instruction does in POWER family. |
| ics | isync | The isync instruction causes more pervasive synchronization in PowerPC than the ics instruction does in POWER family. |
| svca | sc | In POWER family, information from MSR is saved into CTR. In PowerPC, this information is saved into SRR1. PowerPC only supports one vector. POWER family allows instruction fetching to continue at any of 128 locations. POWER family saves the low-order 16 bits of the instruction in CTR. PowerPC does not save the low-order 16 bits of the instruction. |
| mtsri | mtsrin | POWER family uses the RA field to compute the segment register number and, in some cases, the effective address (EA) is stored. PowerPC has no RA field, and the EA is not stored. |
| lsx | lswx | POWER family does not alter the target register RT if the string length is 0. PowerPC leaves the contents of the target register RT undefined if the string length is 0. |
| mfsr | mfsr | This is a nonprivileged instruction in POWER family. It is a privileged instruction in PowerPC. |
| mfmsr | mfmsr | This is a nonprivileged instruction in POWER family. It is a privileged instruction in PowerPC. |
| mfdec | mfdec | The mfdec instruction is nonprivileged in POWER family, but becomes a privileged instruction in PowerPC. As a result, the DEC encoding number for the mfdec instruction is different for POWER family and PowerPC. |
| mffs | mffs | POWER family sets the high-order 32 bits of the result to 0xFFFF FFFF. In PowerPC, the high-order 32 bits of the result are undefined. |
See Features of the AIX Assembler for more information on the PowerPC-specific features of the assembler.
Differences between POWER family and PowerPC Instructions with the Same Op Code.
POWER family Instructions Deleted from PowerPC.
Instructions Available Only for the PowerPC 601 RISC Microprocessor.