Module Name: src Committed By: matt Date: Sun Jun 12 05:44:36 UTC 2011
Modified Files: src/lib/libc/arch/alpha/gen: __setjmp14.S flt_rounds.c fpgetround.c fpsetround.c Log Message: Use excb before and after the mt_fpcr/mf_fpcr instructions as specified in the alpha ARM 4.7.8.1 (Accessing the FPCR): Because Alpha floating-point hardware can overlap the execution of a number of floating-point instructions, accessing the FPCR must be synchronized with other floating-point instructions. An EXCB instruction must be issued both prior to and after accessing the FPCR to ensure that the FPCR access is synchronized with the execution of previous and subsequent floating-point instructions; otherwise synchronization is not ensured. Use unions to convert between double and uint64_t to avoid casting. To generate a diff of this commit: cvs rdiff -u -r1.4 -r1.5 src/lib/libc/arch/alpha/gen/__setjmp14.S cvs rdiff -u -r1.8 -r1.9 src/lib/libc/arch/alpha/gen/flt_rounds.c cvs rdiff -u -r1.9 -r1.10 src/lib/libc/arch/alpha/gen/fpgetround.c cvs rdiff -u -r1.10 -r1.11 src/lib/libc/arch/alpha/gen/fpsetround.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.