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sourcebuild.texi (arm_acq_rel): Document new effective target.

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2016-06-01  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * doc/sourcebuild.texi (arm_acq_rel): Document new effective target.

    gcc/testsuite/
    * lib/target-supports.exp (check_effective_target_arm_acq_rel): New
    procedure.

From-SVN: r237002
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Thomas Preud'homme 2016-06-01 16:54:18 +00:00 • committed by Thomas Preud'homme
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commit 042dee3e3b
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2016-06-01 Thomas Preud'homme <thomas.preudhomme@arm.com>
* doc/sourcebuild.texi (arm_acq_rel): Document new effective target.
2016-06-01 Eduard Sanou <dhole@openmailbox.org>
* doc/cppenv.texi: Note that the `%s` in `date` is a non-standard

3
gcc/doc/sourcebuild.texi
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@ -1597,6 +1597,9 @@ ARM target supports executing ARMv8.1 Adv.SIMD instructions. Some
multilibs may be incompatible with the options needed. Implies
arm_v8_1a_neon_ok.
@item arm_acq_rel
ARM target supports acquire-release instructions.
@item arm_prefer_ldrd_strd
ARM target prefers @code{LDRD} and @code{STRD} instructions over
@code{LDM} and @code{STM} instructions.

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-06-01 Thomas Preud'homme <thomas.preudhomme@arm.com>
* lib/target-supports.exp (check_effective_target_arm_acq_rel): New
procedure.
2016-06-01 Eduard Sanou <dhole@openmailbox.org>
* gcc.dg/cpp/source_date_epoch-1.c: New file, test the proper

23
gcc/testsuite/lib/target-supports.exp
View file

@ -3494,6 +3494,25 @@ proc check_effective_target_arm_neonv2 { } {
}
}
# Return 1 if this is an ARM target with load acquire and store release
# instructions for 8-, 16- and 32-bit types.
proc check_effective_target_arm_acq_rel { } {
return [check_no_compiler_messages arm_acq_rel object {
void
load_acquire_store_release (void)
{
asm ("lda r0, [r1]\n\t"
"stl r0, [r1]\n\t"
"ldah r0, [r1]\n\t"
"stlh r0, [r1]\n\t"
"ldab r0, [r1]\n\t"
"stlb r0, [r1]"
: : : "r0", "memory");
}
}]
}
# Return 1 if this a Loongson-2E or -2F target using an ABI that supports
# the Loongson vector modes.
@ -5725,6 +5744,8 @@ proc check_effective_target_sync_int_long { } {
|| [istarget aarch64*-*-*]
|| [istarget alpha*-*-*]
|| [istarget arm*-*-linux-*]
|| ([istarget arm*-*-*]
&& [check_effective_target_arm_acq_rel])
|| [istarget bfin*-*linux*]
|| [istarget hppa*-*linux*]
|| [istarget s390*-*-*]
@ -5758,6 +5779,8 @@ proc check_effective_target_sync_char_short { } {
|| [istarget i?86-*-*] || [istarget x86_64-*-*]
|| [istarget alpha*-*-*]
|| [istarget arm*-*-linux-*]
|| ([istarget arm*-*-*]
&& [check_effective_target_arm_acq_rel])
|| [istarget hppa*-*linux*]
|| [istarget s390*-*-*]
|| [istarget powerpc*-*-*]