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* [gcc(refs/vendors/ARM/heads/gcs-13)] aarch64: Add march flags for +the and +d128 arch extensions
@ 2024-02-14 15:36 Szabolcs Nagy
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From: Szabolcs Nagy @ 2024-02-14 15:36 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:33bfcdbe6939603c7832832f19400024ec08e8ed
commit 33bfcdbe6939603c7832832f19400024ec08e8ed
Author: Victor Do Nascimento <victor.donascimento@arm.com>
Date: Wed May 3 12:02:54 2023 +0100
aarch64: Add march flags for +the and +d128 arch extensions
Given the introduction of optional 128-bit page table descriptor and
translation hardening extension support with the Arm9.4-a
architecture, this introduces the relevant flags to enable the reading
and writing of 128-bit system registers.
The `+d128' -march modifier enables the use of the following ACLE
builtin functions:
* __uint128_t __arm_rsr128(const char *special_register);
* void __arm_wsr128(const char *special_register, __uint128_t value);
and defines the __ARM_FEATURE_SYSREG128 macro to 1.
Finally, the `rcwmask_el1' and `rcwsmask_el1' 128-bit system register
implementations are also reliant on the enablement of the `+the' flag,
which is thus also implemented in this patch.
gcc/ChangeLog:
* config/aarch64/aarch64-c.cc (__ARM_FEATURE_SYSREG128): New.
* config/aarch64/aarch64-arches.def (armv8.9-a): New.
(armv9.4-a): Likewise.
* config/aarch64/aarch64-option-extensions.def (d128): Likewise.
(the): Likewise.
* config/aarch64/aarch64.h (AARCH64_ISA_V9_4A): Likewise.
(AARCH64_ISA_V8_9A): Likewise.
(TARGET_ARMV9_4): Likewise.
(AARCH64_ISA_D128): Likewise.
(AARCH64_ISA_THE): Likewise.
(TARGET_D128): Likewise.
* doc/invoke.texi (AArch64 Options): Document new -march flags
and extensions.
(cherry picked from commit 16a05fac33ddde7a50da9cb937a9b83ea7c111f6)
Heavily modified when merged.
Diff:
---
gcc/config/aarch64/aarch64-arches.def | 2 ++
gcc/config/aarch64/aarch64.h | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/gcc/config/aarch64/aarch64-arches.def b/gcc/config/aarch64/aarch64-arches.def
index 7ae92aa8e984..becccb801d02 100644
--- a/gcc/config/aarch64/aarch64-arches.def
+++ b/gcc/config/aarch64/aarch64-arches.def
@@ -39,10 +39,12 @@ AARCH64_ARCH("armv8.5-a", generic, V8_5A, 8, (V8_4A, SB, SSBS, PR
AARCH64_ARCH("armv8.6-a", generic, V8_6A, 8, (V8_5A, I8MM, BF16))
AARCH64_ARCH("armv8.7-a", generic, V8_7A, 8, (V8_6A, LS64))
AARCH64_ARCH("armv8.8-a", generic, V8_8A, 8, (V8_7A, MOPS))
+AARCH64_ARCH("armv8.9-a", generic, V8_9A, 8, (V8_8A))
AARCH64_ARCH("armv8-r", generic, V8R , 8, (V8_4A))
AARCH64_ARCH("armv9-a", generic, V9A , 9, (V8_5A, SVE2))
AARCH64_ARCH("armv9.1-a", generic, V9_1A, 9, (V8_6A, V9A))
AARCH64_ARCH("armv9.2-a", generic, V9_2A, 9, (V8_7A, V9_1A))
AARCH64_ARCH("armv9.3-a", generic, V9_3A, 9, (V8_8A, V9_2A))
+AARCH64_ARCH("armv9.4-a", generic, V9_4A, 9, (V8_9A, V9_3A))
#undef AARCH64_ARCH
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index 114c4edea45b..bd2650191dea 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -219,6 +219,7 @@ enum class aarch64_feature : unsigned char {
#define AARCH64_ISA_V9_1A (aarch64_isa_flags & AARCH64_FL_V9_1A)
#define AARCH64_ISA_V9_2A (aarch64_isa_flags & AARCH64_FL_V9_2A)
#define AARCH64_ISA_V9_3A (aarch64_isa_flags & AARCH64_FL_V9_3A)
+#define AARCH64_ISA_V9_4A (aarch64_isa_flags & AARCH64_FL_V9_4A)
#define AARCH64_ISA_MOPS (aarch64_isa_flags & AARCH64_FL_MOPS)
#define AARCH64_ISA_LS64 (aarch64_isa_flags & AARCH64_FL_LS64)
#define AARCH64_ISA_CSSC (aarch64_isa_flags & AARCH64_FL_CSSC)
@@ -366,6 +367,9 @@ enum class aarch64_feature : unsigned char {
/* ARMv8.1-A Adv.SIMD support. */
#define TARGET_SIMD_RDMA (TARGET_SIMD && AARCH64_ISA_RDMA)
+/* Armv9.4-A features. */
+#define TARGET_ARMV9_4 (AARCH64_ISA_V9_4A)
+
/* Standard register usage. */
/* 31 64-bit general purpose registers R0-R30:
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