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cd7ce12a02
The exceptions passed to fe{en,dis}ableexcept() are defined in the ABI
as a bitmask, a combination of FE_INVALID, FE_OVERFLOW, etc.
Within the functions, these bits must be translated to/from the corresponding
enable bits in the Floating Point Status Control Register (FPSCR).
This translation is currently done bit-by-bit. The compiler generates
a series of conditional bit operations. Nicely, the "FE" exception
bits are all a uniform offset from the FPSCR enable bits, so the bit-by-bit
operation can instead be performed by a shift with appropriate masking.
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| .. | ||
| bits | ||
| fpu | ||
| nofpu | ||
| nptl | ||
| power4 | ||
| power6 | ||
| powerpc32 | ||
| powerpc64 | ||
| sys/platform | ||
| abort-instr.h | ||
| atomic-machine.h | ||
| cpu-features.c | ||
| cpu-features.h | ||
| dl-procinfo.c | ||
| dl-procinfo.h | ||
| dl-tls.c | ||
| dl-tls.h | ||
| dl-tunables.list | ||
| ffs.c | ||
| fpu_control.h | ||
| gccframe.h | ||
| hwcapinfo.c | ||
| hwcapinfo.h | ||
| ifunc-sel.h | ||
| jmpbuf-offsets.h | ||
| jmpbuf-unwind.h | ||
| ldsodefs.h | ||
| libc-tls.c | ||
| locale-defines.sym | ||
| longjmp.c | ||
| machine-gmon.h | ||
| Makefile | ||
| math-tests-snan-cast.h | ||
| memusage.h | ||
| mod-tlsopt-powerpc.c | ||
| mp_clz_tab.c | ||
| novmx-longjmp.c | ||
| novmx-sigjmp.c | ||
| novmxsetjmp.h | ||
| preconfigure | ||
| rtld-global-offsets.sym | ||
| sched_cpucount.c | ||
| sigjmp.c | ||
| sotruss-lib.c | ||
| stackinfo.h | ||
| sysdep.h | ||
| test-arith.c | ||
| test-arithf.c | ||
| test-get_hwcap-static.c | ||
| test-get_hwcap.c | ||
| test-gettimebase.c | ||
| tls-macros.h | ||
| tst-set_ppr.c | ||
| tst-stack-align.h | ||
| tst-tlsifunc-static.c | ||
| tst-tlsifunc.c | ||
| tst-tlsopt-powerpc.c | ||
| Versions | ||