Labels:book | earth | reckoner | sky OCR: Chapter 10 -Floating Point 118.5 The forthcoming PowerPC Macs have their own FP instructions. handled within the chip. Until Mops can compile native PPC code. will have to run under emulation However, the emulator does NOT emulate an MC68881/2 This means that for now if you re running FP operations in Mops on PowerPC ,you 'l1 have to use SANE. This should happen automatically, since FPU? will always be set to false on PowerPC But it should now be clear that on a PowerPC you should never set UseFPU? to true This would cause Mops to generate 68881/2 instructions, which be invalid Later, when Mops can compile native PowerPC code will use the native PPC FP instructions, because they will always be present. In this case will ignore UseFPU? So the simple rule for PowerPC compatibility IS leave U ...
