From: Matthew Wahab <matthew.wahab@foss.arm.com>
To: gcc-patches <gcc-patches@gcc.gnu.org>
Subject: [PATCH 1/17][ARM] Add ARMv8.2-A command line option and profile.
Date: Tue, 17 May 2016 14:23:00 -0000 [thread overview]
Message-ID: <573B2938.20804@foss.arm.com> (raw)
In-Reply-To: <573B28A3.9030603@foss.arm.com>
[-- Attachment #1: Type: text/plain, Size: 1827 bytes --]
This patch adds the command options for the architecture ARMv8.2-A and
the half-precision extension. The architecture is selected by
-march=armv8.2-a and has all the properties of -march=armv8.1-a.
This patch also enables the CRC extension (+crc) which is required
for both ARMv8.2-A and ARMv8.1-A architectures but is not currently
enabled by default for -march=armv8.1-a.
The half-precision extension is selected using the extension +fp16. This
enables the VFP FP16 instructions if an ARMv8 VFP unit is also
specified, e.g. by -mfpu=fp-armv8. It also enables the FP16 NEON
instructions if an ARMv8 NEON unit is specified, e.g. by
-mfpu=neon-fp-armv8. Note that if the NEON FP16 instructions are enabled
then so are the VFP FP16 instructions.
Tested the series for arm-none-linux-gnueabihf with native bootstrap and
make check and for arm-none-eabi and armeb-none-eabi with make check on an
ARMv8.2-A emulator.
Ok for trunk?
Matthew
2016-05-17 Matthew Wahab <matthew.wahab@arm.com>
* config/arm/arm-arches.def ("armv8.1-a"): Add FL_CRC32.
("armv8.2-a"): New.
("armv8.2-a+fp16"): New.
* config/arm/arm-protos.h (FL2_ARCH8_2): New.
(FL2_FP16INST): New.
(FL2_FOR_ARCH8_2A): New.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm.c (arm_arch8_2): New.
(arm_fp16_inst): New.
(arm_option_override): Set arm_arch8_2 and arm_fp16_inst. Check
for incompatible fp16-format settings.
* config/arm/arm.h (TARGET_VFP_FP16INST): New.
(TARGET_NEON_FP16INST): New.
(arm_arch8_2): Declare.
(arm_fp16_inst): Declare.
* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for
march=armv8.2-a and march=armv8.2-a+fp16.
* config/arm/t-aprofile (Arch Matches): Add entries for armv8.2-a
and armv8.2-a+fp16.
* doc/invoke.texi (ARM Options): Add "-march=armv8.1-a",
"-march=armv8.2-a" and "-march=armv8.2-a+fp16".
[-- Attachment #2: 0001-PATCH-1-17-ARM-Add-ARMv8.2-A-command-line-option-and.patch --]
[-- Type: text/x-patch, Size: 9707 bytes --]
From 7df41b0a5d248d842fd4c89082dc1a1055dc4604 Mon Sep 17 00:00:00 2001
From: Matthew Wahab <matthew.wahab@arm.com>
Date: Thu, 7 Apr 2016 13:31:24 +0100
Subject: [PATCH 01/17] [PATCH 1/17][ARM] Add ARMv8.2-A command line option and
profile.
2016-05-17 Matthew Wahab <matthew.wahab@arm.com>
* config/arm/arm-arches.def ("armv8.1-a"): Add FL_CRC32.
("armv8.2-a"): New.
("armv8.2-a+fp16"): New.
* config/arm/arm-protos.h (FL2_ARCH8_2): New.
(FL2_FP16INST): New.
(FL2_FOR_ARCH8_2A): New.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm.c (arm_arch8_2): New.
(arm_fp16_inst): New.
(arm_option_override): Set arm_arch8_2 and arm_fp16_inst. Check
for incompatible fp16-format settings.
* config/arm/arm.h (TARGET_VFP_FP16INST): New.
(TARGET_NEON_FP16INST): New.
(arm_arch8_2): Declare.
(arm_fp16_inst): Declare.
* config/arm/bpabi.h (BE8_LINK_SPEC): Add entries for
march=armv8.2-a and march=armv8.2-a+fp16.
* config/arm/t-aprofile (Arch Matches): Add entries for armv8.2-a
and armv8.2-a+fp16.
* doc/invoke.texi (ARM Options): Add "-march=armv8.1-a",
"-march=armv8.2-a" and "-march=armv8.2-a+fp16".
---
gcc/config/arm/arm-arches.def | 10 ++++++++--
gcc/config/arm/arm-protos.h | 4 ++++
gcc/config/arm/arm-tables.opt | 10 ++++++++--
gcc/config/arm/arm.c | 15 +++++++++++++++
gcc/config/arm/arm.h | 14 ++++++++++++++
gcc/config/arm/bpabi.h | 4 ++++
gcc/config/arm/t-aprofile | 2 ++
gcc/doc/invoke.texi | 13 +++++++++++++
8 files changed, 68 insertions(+), 4 deletions(-)
diff --git a/gcc/config/arm/arm-arches.def b/gcc/config/arm/arm-arches.def
index fd02b18..2b4a80e 100644
--- a/gcc/config/arm/arm-arches.def
+++ b/gcc/config/arm/arm-arches.def
@@ -58,10 +58,16 @@ ARM_ARCH("armv7e-m", cortexm4, 7EM, ARM_FSET_MAKE_CPU1 (FL_CO_PROC | FL_F
ARM_ARCH("armv8-a", cortexa53, 8A, ARM_FSET_MAKE_CPU1 (FL_CO_PROC | FL_FOR_ARCH8A))
ARM_ARCH("armv8-a+crc",cortexa53, 8A, ARM_FSET_MAKE_CPU1 (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A))
ARM_ARCH("armv8.1-a", cortexa53, 8A,
- ARM_FSET_MAKE (FL_CO_PROC | FL_FOR_ARCH8A, FL2_FOR_ARCH8_1A))
+ ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+ FL2_FOR_ARCH8_1A))
ARM_ARCH("armv8.1-a+crc",cortexa53, 8A,
ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
FL2_FOR_ARCH8_1A))
+ARM_ARCH ("armv8.2-a", cortexa53, 8A,
+ ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+ FL2_FOR_ARCH8_2A))
+ARM_ARCH ("armv8.2-a+fp16", cortexa53, 8A,
+ ARM_FSET_MAKE (FL_CO_PROC | FL_CRC32 | FL_FOR_ARCH8A,
+ FL2_FOR_ARCH8_2A | FL2_FP16INST))
ARM_ARCH("iwmmxt", iwmmxt, 5TE, ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_STRONG | FL_FOR_ARCH5TE | FL_XSCALE | FL_IWMMXT))
ARM_ARCH("iwmmxt2", iwmmxt2, 5TE, ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_STRONG | FL_FOR_ARCH5TE | FL_XSCALE | FL_IWMMXT | FL_IWMMXT2))
-
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index d8179c4..c1a1eb8 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -390,6 +390,9 @@ extern bool arm_is_constant_pool_ref (rtx);
#define FL_ARCH6KZ (1 << 31) /* ARMv6KZ architecture. */
#define FL2_ARCH8_1 (1 << 0) /* Architecture 8.1. */
+#define FL2_ARCH8_2 (1 << 1) /* Architecture 8.2. */
+#define FL2_FP16INST (1 << 2) /* FP16 Instructions for ARMv8.2 and
+ later. */
/* Flags that only effect tuning, not available instructions. */
#define FL_TUNE (FL_WBUF | FL_VFPV2 | FL_STRONG | FL_LDSCHED \
@@ -420,6 +423,7 @@ extern bool arm_is_constant_pool_ref (rtx);
#define FL_FOR_ARCH7EM (FL_FOR_ARCH7M | FL_ARCH7EM)
#define FL_FOR_ARCH8A (FL_FOR_ARCH7VE | FL_ARCH8)
#define FL2_FOR_ARCH8_1A FL2_ARCH8_1
+#define FL2_FOR_ARCH8_2A (FL2_FOR_ARCH8_1A | FL2_ARCH8_2)
/* There are too many feature bits to fit in a single word so the set of cpu and
fpu capabilities is a structure. A feature set is created and manipulated
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index adec6c9..fccd621 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -428,10 +428,16 @@ EnumValue
Enum(arm_arch) String(armv8.1-a+crc) Value(28)
EnumValue
-Enum(arm_arch) String(iwmmxt) Value(29)
+Enum(arm_arch) String(armv8.2-a) Value(29)
EnumValue
-Enum(arm_arch) String(iwmmxt2) Value(30)
+Enum(arm_arch) String(armv8.2-a+fp16) Value(30)
+
+EnumValue
+Enum(arm_arch) String(iwmmxt) Value(31)
+
+EnumValue
+Enum(arm_arch) String(iwmmxt2) Value(32)
Enum
Name(arm_fpu) Type(int)
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index c3f74dc..f3914ef 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -815,6 +815,13 @@ int arm_arch8 = 0;
/* Nonzero if this chip supports the ARMv8.1 extensions. */
int arm_arch8_1 = 0;
+/* Nonzero if this chip supports the ARM Architecture 8.2 extensions. */
+int arm_arch8_2 = 0;
+
+/* Nonzero if this chip supports the FP16 instructions extension of ARM
+ Architecture 8.2. */
+int arm_fp16_inst = 0;
+
/* Nonzero if this chip can benefit from load scheduling. */
int arm_ld_sched = 0;
@@ -3165,6 +3172,8 @@ arm_option_override (void)
arm_arch7em = ARM_FSET_HAS_CPU1 (insn_flags, FL_ARCH7EM);
arm_arch8 = ARM_FSET_HAS_CPU1 (insn_flags, FL_ARCH8);
arm_arch8_1 = ARM_FSET_HAS_CPU2 (insn_flags, FL2_ARCH8_1);
+ arm_arch8_2 = ARM_FSET_HAS_CPU2 (insn_flags, FL2_ARCH8_2);
+ arm_fp16_inst = ARM_FSET_HAS_CPU2 (insn_flags, FL2_FP16INST);
arm_arch_thumb2 = ARM_FSET_HAS_CPU1 (insn_flags, FL_THUMB2);
arm_arch_xscale = ARM_FSET_HAS_CPU1 (insn_flags, FL_XSCALE);
@@ -3180,6 +3189,12 @@ arm_option_override (void)
arm_tune_cortex_a9 = (arm_tune == cortexa9) != 0;
arm_arch_crc = ARM_FSET_HAS_CPU1 (insn_flags, FL_CRC32);
arm_m_profile_small_mul = ARM_FSET_HAS_CPU1 (insn_flags, FL_SMALLMUL);
+ if (arm_fp16_inst)
+ {
+ if (arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
+ error ("selected fp16 options are incompatible.");
+ arm_fp16_format = ARM_FP16_FORMAT_IEEE;
+ }
/* V5 code we generate is completely interworking capable, so we turn off
TARGET_INTERWORK here to avoid many tests later on. */
diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index 5b1a030..952cf08 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -222,6 +222,13 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
/* FPU supports ARMv8.1 Adv.SIMD extensions. */
#define TARGET_NEON_RDMA (TARGET_NEON && arm_arch8_1)
+/* FPU supports the floating point FP16 instructions for ARMv8.2 and later. */
+#define TARGET_VFP_FP16INST \
+ (TARGET_32BIT && TARGET_HARD_FLOAT && TARGET_FPU_ARMV8 && arm_fp16_inst)
+
+/* FPU supports the AdvSIMD FP16 instructions for ARMv8.2 and later. */
+#define TARGET_NEON_FP16INST (TARGET_VFP_FP16INST && TARGET_NEON_RDMA)
+
/* Q-bit is present. */
#define TARGET_ARM_QBIT \
(TARGET_32BIT && arm_arch5e && (arm_arch_notm || arm_arch7))
@@ -448,6 +455,13 @@ extern int arm_arch8;
/* Nonzero if this chip supports the ARM Architecture 8.1 extensions. */
extern int arm_arch8_1;
+/* Nonzero if this chip supports the ARM Architecture 8.2 extensions. */
+extern int arm_arch8_2;
+
+/* Nonzero if this chip supports the FP16 instructions extension of ARM
+ Architecture 8.2. */
+extern int arm_fp16_inst;
+
/* Nonzero if this chip can benefit from load scheduling. */
extern int arm_ld_sched;
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index 06488ba..d7f721a 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -90,6 +90,8 @@
|march=armv8-a+crc \
|march=armv8.1-a \
|march=armv8.1-a+crc \
+ |march=armv8.2-a \
+ |march=armv8.2-a+fp16 \
:%{!r:--be8}}}"
#else
#define BE8_LINK_SPEC \
@@ -121,6 +123,8 @@
|march=armv8-a+crc \
|march=armv8.1-a \
|march=armv8.1-a+crc \
+ |march=armv8.2-a \
+ |march=armv8.2-a+fp16 \
:%{!r:--be8}}}"
#endif
diff --git a/gcc/config/arm/t-aprofile b/gcc/config/arm/t-aprofile
index b0ecc2f..2a53b81 100644
--- a/gcc/config/arm/t-aprofile
+++ b/gcc/config/arm/t-aprofile
@@ -101,6 +101,8 @@ MULTILIB_MATCHES += march?armv8-a=mcpu?xgene1
MULTILIB_MATCHES += march?armv8-a=march?armv8-a+crc
MULTILIB_MATCHES += march?armv8-a=march?armv8.1-a
MULTILIB_MATCHES += march?armv8-a=march?armv8.1-a+crc
+MULTILIB_MATCHES += march?armv8-a=march?armv8.2-a
+MULTILIB_MATCHES += march?armv8-a=march?armv8.2-a+fp16
# FPU matches
MULTILIB_MATCHES += mfpu?vfpv3-d16=mfpu?vfpv3
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 8f35f47..cbed378 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14030,6 +14030,19 @@ extensions.
@option{-march=armv8-a+crc} enables code generation for the ARMv8-A
architecture together with the optional CRC32 extensions.
+@option{-march=armv8.1-a} enables compiler support for the ARMv8.1-A
+architecture. This also enables the features provided by
+@option{-march=armv8-a+crc}.
+
+@option{-march=armv8.2-a} enables compiler support for the ARMv8.2-A
+architecture. This also enables the features provided by
+@option{-march=armv8.1-a}.
+
+@option{-march=armv8.2-a+fp16} enables compiler support for the
+ARMv8.2-A architecture with the optional FP16 instructions extension.
+This also enables the features provided by @option{-march=armv8.1-a}
+and implies @option{-mfp16-format=ieee}.
+
@option{-march=native} causes the compiler to auto-detect the architecture
of the build computer. At present, this feature is only supported on
GNU/Linux, and not all architectures are recognized. If the auto-detect
--
2.1.4
next prev parent reply other threads:[~2016-05-17 14:23 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-17 14:20 [PATCH 0/17][ARM] ARMv8.2-A and FP16 extension support Matthew Wahab
2016-05-17 14:23 ` Matthew Wahab [this message]
2016-07-04 13:46 ` [PATCH 1/17][ARM] Add ARMv8.2-A command line option and profile Matthew Wahab
2016-09-21 13:57 ` Ramana Radhakrishnan
2016-05-17 14:25 ` [PATCH 2/17][Testsuite] Add a selector for ARM FP16 alternative format support Matthew Wahab
2016-07-27 13:34 ` Ramana Radhakrishnan
2016-05-17 14:26 ` [PATCH 3/17][Testsuite] Add ARM support for ARMv8.2-A with FP16 arithmetic instructions Matthew Wahab
2016-07-04 13:49 ` Matthew Wahab
2016-07-27 13:34 ` Ramana Radhakrishnan
2016-05-17 14:28 ` [PATCH 4/17][ARM] Define feature macros for FP16 Matthew Wahab
2016-07-27 13:35 ` Ramana Radhakrishnan
2016-05-17 14:29 ` [PATCH 5/17][ARM] Enable HI mode moves for floating point values Matthew Wahab
2016-07-27 13:57 ` Ramana Radhakrishnan
2016-09-26 13:20 ` Christophe Lyon
2016-09-26 13:26 ` Matthew Wahab
2016-05-17 14:32 ` [PATCH 6/17][ARM] Add data processing intrinsics for float16_t Matthew Wahab
2016-07-27 13:59 ` Ramana Radhakrishnan
2016-09-25 14:44 ` Christophe Lyon
2016-09-26 9:56 ` Matthew Wahab
2016-09-26 12:54 ` Christophe Lyon
2016-09-26 13:11 ` Ramana Radhakrishnan
2016-09-26 13:19 ` Matthew Wahab
2016-09-26 13:21 ` Christophe Lyon
2016-09-26 20:02 ` Christophe Lyon
2016-05-17 14:34 ` [PATCH 7/17][ARM] Add FP16 data movement instructions Matthew Wahab
2016-07-04 13:57 ` Matthew Wahab
2016-07-27 14:01 ` Ramana Radhakrishnan
2016-05-17 14:36 ` [PATCH 8/17][ARM] Add VFP FP16 arithmetic instructions Matthew Wahab
2016-05-18 0:52 ` Joseph Myers
2016-05-18 0:57 ` Joseph Myers
2016-05-18 13:40 ` Matthew Wahab
2016-05-18 15:21 ` Joseph Myers
2016-05-19 14:54 ` Matthew Wahab
2016-07-04 14:02 ` Matthew Wahab
2016-07-28 11:37 ` Ramana Radhakrishnan
2016-08-03 11:52 ` Ramana Radhakrishnan
2016-08-03 13:10 ` Matthew Wahab
2016-08-03 14:45 ` James Greenhalgh
2016-08-03 17:44 ` Joseph Myers
2016-05-17 14:37 ` [PATCH 9/17][ARM] Add NEON " Matthew Wahab
2016-05-18 0:58 ` Joseph Myers
2016-05-19 17:01 ` Jiong Wang
2016-05-19 17:29 ` Joseph Myers
2016-06-08 8:46 ` James Greenhalgh
2016-06-08 20:02 ` Joseph Myers
2016-07-04 14:09 ` Matthew Wahab
2016-07-28 11:53 ` Ramana Radhakrishnan
2016-05-17 14:39 ` [PATCH 10/17][ARM] Refactor support code for NEON builtins Matthew Wahab
2016-07-28 11:54 ` Ramana Radhakrishnan
2016-12-05 16:47 ` [arm-embedded][committed][PATCH 10/17] " Andre Vieira (lists)
2016-05-17 14:41 ` [PATCH 11/17][ARM] Add builtins for VFP FP16 intrinsics Matthew Wahab
2016-07-04 14:12 ` Matthew Wahab
2016-07-28 11:55 ` Ramana Radhakrishnan
2016-05-17 14:43 ` [PATCH 12/17][ARM] Add builtins for NEON " Matthew Wahab
2016-07-04 14:13 ` Matthew Wahab
2016-07-28 11:56 ` Ramana Radhakrishnan
2016-05-17 14:44 ` [PATCH 13/17][ARM] Add VFP FP16 instrinsics Matthew Wahab
2016-07-04 14:14 ` Matthew Wahab
2016-07-28 11:57 ` Ramana Radhakrishnan
2016-05-17 14:47 ` [PATCH 14/17][ARM] Add NEON " Matthew Wahab
2016-07-04 14:16 ` Matthew Wahab
2016-08-03 12:57 ` Ramana Radhakrishnan
2016-05-17 14:49 ` [PATCH 15/17][ARM] Add tests for ARMv8.2-A FP16 support Matthew Wahab
2016-07-04 14:17 ` Matthew Wahab
2016-08-04 8:34 ` Ramana Radhakrishnan
2016-05-17 14:51 ` [PATCH 16/17][ARM] Add tests for VFP FP16 ACLE instrinsics Matthew Wahab
2016-05-18 1:07 ` Joseph Myers
2016-05-18 10:58 ` Matthew Wahab
2016-07-04 14:18 ` Matthew Wahab
2016-08-04 8:35 ` Ramana Radhakrishnan
2016-05-17 14:52 ` [PATCH 17/17][ARM] Add tests for NEON FP16 ACLE intrinsics Matthew Wahab
2016-07-04 14:22 ` Matthew Wahab
2016-08-04 9:01 ` Ramana Radhakrishnan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=573B2938.20804@foss.arm.com \
--to=matthew.wahab@foss.arm.com \
--cc=gcc-patches@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).