procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

aarch64: Add support for Armv8-R

Browse source 
This adds support for Armv8-R AArch64 to GCC. It adds the -march value
armv8-r and sets the ACLE feature macro __ARM_ARCH_PROFILE correctly
when -march is set to armv8-r.

gcc/ChangeLog:

	* common/config/aarch64/aarch64-common.c
	(aarch64_get_extension_string_for_isa_flags): Don't force +crc for
	Armv8-R.
	* config/aarch64/aarch64-arches.def: Add entry for Armv8-R.
	* config/aarch64/aarch64-c.c (aarch64_define_unconditional_macros): Set
	__ARM_ARCH_PROFILE correctly for Armv8-R.
	* config/aarch64/aarch64.h (AARCH64_FL_V8_R): New.
	(AARCH64_FL_FOR_ARCH8_R): New.
	(AARCH64_ISA_V8_R): New.
	* doc/invoke.texi: Add Armv8-R to architecture table.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/acle/armv8-r.c: New test.
This commit is contained in:
Alex Coplan 2020-09-10 17:05:40 +01:00
parent 36efcd7de0
commit 786177a3fc
6 changed files with 20 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
gcc/common/config/aarch64/aarch64-common.c
View file

@ -426,8 +426,11 @@ aarch64_get_extension_string_for_isa_flags (uint64_t isa_flags,
names. However as a special case if CRC was enabled before, always print
it. This is required because some CPUs have an incorrect specification
in older assemblers. Even though CRC should be the default for these
cases the -mcpu values won't turn it on. */
if (isa_flags & AARCH64_ISA_CRC)
cases the -mcpu values won't turn it on.
Note that assemblers with Armv8-R AArch64 support should not have this
issue, so we don't need this fix when targeting Armv8-R. */
if ((isa_flags & AARCH64_ISA_CRC) && !AARCH64_ISA_V8_R)
isa_flag_bits |= AARCH64_ISA_CRC;
/* Pass Two:

1
gcc/config/aarch64/aarch64-arches.def
View file

@ -37,5 +37,6 @@ AARCH64_ARCH("armv8.3-a", generic, 8_3A, 8, AARCH64_FL_FOR_ARCH8_3)
AARCH64_ARCH("armv8.4-a", generic, 8_4A, 8, AARCH64_FL_FOR_ARCH8_4)
AARCH64_ARCH("armv8.5-a", generic, 8_5A, 8, AARCH64_FL_FOR_ARCH8_5)
AARCH64_ARCH("armv8.6-a", generic, 8_6A, 8, AARCH64_FL_FOR_ARCH8_6)
AARCH64_ARCH("armv8-r", generic, 8R , 8, AARCH64_FL_FOR_ARCH8_R)
#undef AARCH64_ARCH

3
gcc/config/aarch64/aarch64-c.c
View file

@ -63,7 +63,8 @@ aarch64_define_unconditional_macros (cpp_reader *pfile)
as interoperability with the same arm macro. */
builtin_define ("__ARM_ARCH_8A");
builtin_define_with_int_value ("__ARM_ARCH_PROFILE", 'A');
builtin_define_with_int_value ("__ARM_ARCH_PROFILE",
AARCH64_ISA_V8_R ? 'R' : 'A');
builtin_define ("__ARM_FEATURE_CLZ");
builtin_define ("__ARM_FEATURE_IDIV");
builtin_define ("__ARM_FEATURE_UNALIGNED");

5
gcc/config/aarch64/aarch64.h
View file

@ -161,6 +161,8 @@ extern unsigned aarch64_architecture_version;
#define AARCH64_FL_LSE (1 << 4) /* Has Large System Extensions. */
#define AARCH64_FL_RDMA (1 << 5) /* Has Round Double Multiply Add. */
#define AARCH64_FL_V8_1 (1 << 6) /* Has ARMv8.1-A extensions. */
/* Armv8-R. */
#define AARCH64_FL_V8_R (1 << 7) /* Armv8-R AArch64. */
/* ARMv8.2-A architecture extensions. */
#define AARCH64_FL_V8_2 (1 << 8) /* Has ARMv8.2-A features. */
#define AARCH64_FL_F16 (1 << 9) /* Has ARMv8.2-A FP16 extensions. */
@ -246,6 +248,8 @@ extern unsigned aarch64_architecture_version;
#define AARCH64_FL_FOR_ARCH8_6 \
(AARCH64_FL_FOR_ARCH8_5 | AARCH64_FL_V8_6 | AARCH64_FL_FPSIMD \
| AARCH64_FL_I8MM | AARCH64_FL_BF16)
#define AARCH64_FL_FOR_ARCH8_R \
(AARCH64_FL_FOR_ARCH8_4 | AARCH64_FL_V8_R)
/* Macros to test ISA flags. */
@ -282,6 +286,7 @@ extern unsigned aarch64_architecture_version;
#define AARCH64_ISA_F64MM (aarch64_isa_flags & AARCH64_FL_F64MM)
#define AARCH64_ISA_BF16 (aarch64_isa_flags & AARCH64_FL_BF16)
#define AARCH64_ISA_SB (aarch64_isa_flags & AARCH64_FL_SB)
#define AARCH64_ISA_V8_R (aarch64_isa_flags & AARCH64_FL_V8_R)
/* Crypto is an optional extension to AdvSIMD. */
#define TARGET_CRYPTO (TARGET_SIMD && AARCH64_ISA_CRYPTO)

1
gcc/doc/invoke.texi
View file

@ -17344,6 +17344,7 @@ and the features that they enable by default:
@item @samp{armv8.4-a} @tab Armv8.4-A @tab @samp{armv8.3-a}, @samp{+fp16fml}, @samp{+dotprod}
@item @samp{armv8.5-a} @tab Armv8.5-A @tab @samp{armv8.4-a}, @samp{+sb}, @samp{+ssbs}, @samp{+predres}
@item @samp{armv8.6-a} @tab Armv8.6-A @tab @samp{armv8.5-a}, @samp{+bf16}, @samp{+i8mm}
@item @samp{armv8-r} @tab Armv8-R @tab @samp{armv8-r}
@end multitable
The value @samp{native} is available on native AArch64 GNU/Linux and

6
gcc/testsuite/gcc.target/aarch64/acle/armv8-r.c Normal file
View file

@ -0,0 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-march=armv8-r" } */
#if __ARM_ARCH_PROFILE != 'R'
#error ACLE architecture profile macro incorrect
#endif