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[AArch64] Add separate feature flag for weaker release consistent load insns

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The weaker release consistency support of ARMv8.3-A is allowed as an optional
extension for ARMv8.2-A, so separate command line option and feature flag is
added: -march=armv8.2-a+rcpc turns LDAPR, LDAPRB, LDAPRH instructions on.

opcodes/
	* aarch64-tbl.h (RCPC, RCPC_INSN): Define.
	(aarch64_opcode_table): Use RCPC_INSN.

include/
	* opcode/aarch64.h (AARCH64_FEATURE_RCPC): Define.
	(AARCH64_ARCH_V8_3): Update.

gas/
	* config/tc-aarch64.c (aarch64_features): Add rcpc.
	* doc/c-aarch64.texi (AArch64 Extensions): Document rcpc.
	* testsuite/gas/aarch64/ldst-exclusive-armv8_3.d: Rename to ...
	* testsuite/gas/aarch64/ldst-rcpc.d: This.
	* testsuite/gas/aarch64/ldst-exclusive-armv8_3.s: Rename to ...
	* testsuite/gas/aarch64/ldst-rcpc.s: This.
	* testsuite/gas/aarch64/ldst-rcpc-armv8_2.d: New test.
This commit is contained in:
Szabolcs Nagy 2017-01-04 12:27:10 +00:00
parent 10ab38d930
commit d74d4880e2
9 changed files with 54 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/opcode/aarch64.h
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@ -53,6 +53,7 @@ typedef uint32_t aarch64_insn;
#define AARCH64_FEATURE_RAS 0x04000000 /* RAS Extensions. */
#define AARCH64_FEATURE_PROFILE 0x08000000 /* Statistical Profiling. */
#define AARCH64_FEATURE_SVE 0x10000000 /* SVE instructions. */
#define AARCH64_FEATURE_RCPC 0x20000000 /* RCPC instructions. */
/* Architectures are the sum of the base and extensions. */
#define AARCH64_ARCH_V8 AARCH64_FEATURE (AARCH64_FEATURE_V8, \
@ -70,7 +71,8 @@ typedef uint32_t aarch64_insn;
| AARCH64_FEATURE_F16 \
| AARCH64_FEATURE_RAS)
#define AARCH64_ARCH_V8_3 AARCH64_FEATURE (AARCH64_ARCH_V8_2, \
AARCH64_FEATURE_V8_3)
AARCH64_FEATURE_V8_3 \
| AARCH64_FEATURE_RCPC)
#define AARCH64_ARCH_NONE AARCH64_FEATURE (0, 0)
#define AARCH64_ANY AARCH64_FEATURE (-1, 0) /* Any basic core. */