glibc optimizations and x86 variants
Ulrich Drepper
drepper@cygnus.com
Thu Apr 1 00:00:00 GMT 1999
"Joseph S. Myers" <jsm28@cam.ac.uk> writes:
> Some of the optimized assembler sources in glibc (2.0.110) for x86
> variants seem to use non-386 instructions. Does glibc substitute 386
> versions at runtime if needed? (The INSTALL file says that a library
> compiled for a Pentium will still work on a 386.)
Only if you select -mpentiumpro you'll get code which does not run on
prior processors.
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Ulrich Drepper \ ,-------------------' \ Sunnyvale, CA 94089 USA
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