delta/libatomic_ops.git/src, branch add-aarch64-support

Always use 'mfence' for nop_full if target CPU supports SSE2 (gcc/x86)

2013-03-09T16:28:00+00:00

* src/atomic_ops/sysdeps/gcc/x86.h (AO_USE_PENTIUM4_INSTRS): Define
if __SSE2__ is defined; update comment (and remove TODO item).

Fix assembly comment prefix and identify memory clobbers for AArch64

2013-03-09T13:00:43+00:00

* src/atomic_ops/sysdeps/gcc/aarch64.h: Revert comments beginning
marker to '//' (since '@' is not supported for A64 assembler).
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load): Add comment
about the need for STXP instruction; remove TODO item.
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_store): Add comment
about absence of "cc" in clobber lists; remove TODO item.
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load,
AO_double_load_acquire, AO_double_store, AO_double_store_release,
AO_double_compare_and_swap, AO_double_compare_and_swap_acquire,
AO_double_compare_and_swap_release): Use Q constraint (instead of "r")
for 'addr' argument to instruct the compiler about memory clobbers.

Use AO_EXPECT_FALSE for AArch64 double_load/store

2013-03-04T21:02:19+00:00

* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_HAVE_DOUBLE_PTR_STORAGE):
Do not check (since defined in standard_ao_double_t.h for AArch64).
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load): Add TODO
items.
* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load,
AO_double_load_acquire, AO_double_store, AO_double_store_release):
Use AO_EXPECT_FALSE.

Workaround missing built-in double-wide primitives for AArch64 in gcc-4.7

2013-03-04T20:25:33+00:00

* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load,
AO_double_load_acquire, AO_double_store, AO_double_store_release,
AO_double_compare_and_swap, AO_double_compare_and_swap_acquire,
AO_double_compare_and_swap_release): Define using inline assembly
(because GCC 4.7-2013.01 has no support of 16-byte atomic operations).
* src/atomic_ops/sysdeps/gcc/generic.h (AO_double_load,
AO_double_load_acquire, AO_double_store, AO_double_store_release,
AO_double_compare_and_swap): Do not define if the corresponding
AO_HAVE_double_X macro is defined.

gcc/x86.h: Add TODO items

2013-02-28T19:02:07+00:00

Merge remote-tracking branch 'origin/master' into add-aarch64-support

2013-02-28T18:40:01+00:00

Minimize gcc/generic-arithm template by factoring out barriers

2013-02-28T18:38:25+00:00

(code refactoring)

* src/Makefile.am (atomic_ops/sysdeps/gcc/generic-arithm.h): Iterate
over XBAR/XGCCBAR (in addition to XSIZE/XCTYPE).
* src/atomic_ops/sysdeps/gcc/generic-arithm.template: Parametrize all
primitives with XBAR (replacing AO none/acquire/release/full barriers)
and with XGCCBAR (replacing GCC atomic RELAXED/ACQUIRE/RELEASE/SEQ_CST
barriers, respectively).
* src/atomic_ops/sysdeps/gcc/generic-arithm.h: Regenerate.

Implement char/short/int-wide primitives using GCC built-in atomic/sync

2013-02-28T17:55:48+00:00

* src/Makefile.am (EXTRA_DIST): Add gcc/generic-arithm.template,
gcc/generic-small.template entries.
* src/Makefile.am (nobase_private_HEADERS): Move gcc/generic-arithm.h,
atomic_ops/sysdeps/gcc/generic-small.h to BUILT_SOURCES.
* src/Makefile.am (atomic_ops/sysdeps/gcc/generic-arithm.h,
atomic_ops/sysdeps/gcc/generic-small.h): New rules (to generate
AO_char/short/int_X primitives included from gcc/generic.h file.
* src/atomic_ops/sysdeps/gcc/generic-arithm.template: New template
file (based on code moved from generic-arithm.h).
* src/atomic_ops/sysdeps/gcc/generic-small.template: New template file
(based on code moved from generic-small.h).
* src/atomic_ops/sysdeps/gcc/generic-arithm.h: Regenerate.
* src/atomic_ops/sysdeps/gcc/generic-small.h: Likewise.

Move gcc-generic AO_t-wide primitives to generic-small/arithm headers

2013-02-28T17:19:41+00:00

(code refactoring)

* src/atomic_ops/sysdeps/gcc/generic-small.h: New file.
* src/atomic_ops/sysdeps/gcc/generic-arithm.h: Likewise.
* src/atomic_ops/sysdeps/gcc/generic.h: Include generic-small.h file.
* src/atomic_ops/sysdeps/gcc/generic.h (AO_load, AO_load_acquire,
AO_store, AO_store_release, AO_fetch_compare_and_swap,
AO_compare_and_swap): Move to generic-small.h file.
* src/atomic_ops/sysdeps/gcc/generic.h: Include generic-arithm.h file
unless AO_PREFER_GENERALIZED.
* src/atomic_ops/sysdeps/gcc/generic.h (AO_fetch_and_add,
AO_fetch_and_add_acquire, AO_fetch_and_add_release,
AO_fetch_and_add_full, AO_and, AO_and_acquire, AO_and_release,
AO_and_full, AO_or, AO_or_acquire, AO_or_release, AO_or_full, AO_xor,
AO_xor_acquire, AO_xor_release, AO_xor_full): Move to generic-arithm.h
file.
* src/Makefile.am (nobase_private_HEADERS): Add gcc/generic-arithm.h,
gcc/generic-small.h entries.

Define nop_write as 'dmb st' for AArch64

2013-02-28T15:46:58+00:00

* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_nop_write): Define via asm
(dmb st) statement unless AO_UNIPROCESSOR (because it seems there is
no equivalent definition using compiler __atomic_thread_fence).
* src/atomic_ops/sysdeps/gcc/generic.h (AO_nop_write): Do not define
if already is.