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| author | YunQiang Su <wzssyqa@gmail.com> | 2018-03-16 09:58:22 +0300 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2018-03-27 10:36:09 +0300 |
| commit | f69abe165db7181728cdb0ddc670541b9d434db7 (patch) | |
| tree | 4f604d8cd615c305f10d650289c97863fdccfb14 /src/atomic_ops | |
| parent | 5cae4d65314609b98f942ef39c102b15238cc12e (diff) | |
| download | libatomic_ops-f69abe165db7181728cdb0ddc670541b9d434db7.tar.gz | |
Support MIPS rel6
Don't set mips2/3 for mips r6. MIPS release 6 changes the encoding of
some instructions, including ll/sc. Setting mips2/3 here produces the
binary with the old encoding (not compatible with mips r6).
This patch has no effect if gcc 4.9+ or clang 3.5+ unless
AO_DISABLE_GCC_ATOMICS is defined manually in CFLAGS.
* src/atomic_ops/sysdeps/gcc/mips.h [AO_DISABLE_GCC_ATOMICS
&& __mips_isa_rev>=6] (AO_MIPS_SET_ISA): Define to empty string
(instead of ".set mips2" or ".set mips3").
Diffstat (limited to 'src/atomic_ops')
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/mips.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/mips.h b/src/atomic_ops/sysdeps/gcc/mips.h index d7a3620..34cc4fb 100644 --- a/src/atomic_ops/sysdeps/gcc/mips.h +++ b/src/atomic_ops/sysdeps/gcc/mips.h @@ -41,14 +41,23 @@ # if !defined(_ABI64) || _MIPS_SIM != _ABI64 # define AO_T_IS_INT -# define AO_MIPS_SET_ISA " .set mips2\n" +# if __mips_isa_rev >= 6 + /* Encoding of ll/sc in mips rel6 differs from that of mips2/3. */ +# define AO_MIPS_SET_ISA "" +# else +# define AO_MIPS_SET_ISA " .set mips2\n" +# endif # define AO_MIPS_LL_1(args) " ll " args "\n" # define AO_MIPS_SC(args) " sc " args "\n" # else -# define AO_MIPS_SET_ISA " .set mips3\n" +# if __mips_isa_rev >= 6 +# define AO_MIPS_SET_ISA "" +# else +# define AO_MIPS_SET_ISA " .set mips3\n" +# endif # define AO_MIPS_LL_1(args) " lld " args "\n" # define AO_MIPS_SC(args) " scd " args "\n" -# endif +# endif /* _MIPS_SIM == _ABI64 */ #ifdef AO_ICE9A1_LLSC_WAR /* ICE9 rev A1 chip (used in very few systems) is reported to */ |