* libc/machine/mips/memcpy.S (memcpy): Check if _MIPS_SIM is set.
* libc/machine/mips/memcpy.c: Remove. * libc/machine/mips/memcpy.S: New. * libc/machine/mips/Makefile.am (lib_a_CCASFLAGS): Add -D_COMPILING_NEWLIB. (lib_a_CFLAGS): Ditto.