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arm-arches.def (armv8-m.base): Define new architecture.

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2016-07-07  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm-arches.def (armv8-m.base): Define new architecture.
    (armv8-m.main): Likewise.
    (armv8-m.main+dsp): Likewise.
    * config/arm/arm-protos.h (FL_FOR_ARCH8M_BASE): Define.
    (FL_FOR_ARCH8M_MAIN): Likewise.
    * config/arm/arm-tables.opt: Regenerate.
    * config/arm/bpabi.h: Add armv8-m.base, armv8-m.main and
    armv8-m.main+dsp to BE8_LINK_SPEC.
    * config/arm/arm.h (TARGET_HAVE_LDACQ): Exclude ARMv8-M.
    (enum base_architecture): Add BASE_ARCH_8M_BASE and BASE_ARCH_8M_MAIN.
    * config/arm/arm.c (arm_arch_name): Increase size to work with ARMv8-M
    Baseline and Mainline.
    (arm_option_override_internal): Also disable arm_restrict_it when
    !arm_arch_notm.  Update comment for -munaligned-access to also cover
    ARMv8-M Baseline.
    (arm_file_start): Increase buffer size for printing architecture name.
    * doc/invoke.texi: Document architectures armv8-m.base, armv8-m.main
    and armv8-m.main+dsp.
    (mno-unaligned-access): Clarify that this is disabled by default for
    ARMv8-M Baseline architectures as well.

    gcc/testsuite/
    * lib/target-supports.exp: Generate add_options_for_arm_arch_FUNC and
    check_effective_target_arm_arch_FUNC_multilib for ARMv8-M Baseline and
    ARMv8-M Mainline architectures.

    libgcc/
    * config/arm/lib1funcs.S (__ARM_ARCH__): Define to 8 for ARMv8-M.

From-SVN: r238081
This commit is contained in:
Thomas Preud'homme 2016-07-07 08:54:40 +00:00 • committed by Thomas Preud'homme
parent 3d16d9ec3c
commit 05a437c1f3
12 changed files with 82 additions and 16 deletions
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23
gcc/ChangeLog
View file

@ -1,3 +1,26 @@
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/arm-arches.def (armv8-m.base): Define new architecture.
(armv8-m.main): Likewise.
(armv8-m.main+dsp): Likewise.
* config/arm/arm-protos.h (FL_FOR_ARCH8M_BASE): Define.
(FL_FOR_ARCH8M_MAIN): Likewise.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/bpabi.h: Add armv8-m.base, armv8-m.main and
armv8-m.main+dsp to BE8_LINK_SPEC.
* config/arm/arm.h (TARGET_HAVE_LDACQ): Exclude ARMv8-M.
(enum base_architecture): Add BASE_ARCH_8M_BASE and BASE_ARCH_8M_MAIN.
* config/arm/arm.c (arm_arch_name): Increase size to work with ARMv8-M
Baseline and Mainline.
(arm_option_override_internal): Also disable arm_restrict_it when
!arm_arch_notm. Update comment for -munaligned-access to also cover
ARMv8-M Baseline.
(arm_file_start): Increase buffer size for printing architecture name.
* doc/invoke.texi: Document architectures armv8-m.base, armv8-m.main
and armv8-m.main+dsp.
(mno-unaligned-access): Clarify that this is disabled by default for
ARMv8-M Baseline architectures as well.
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/elf.h: Use __ARM_ARCH_ISA_THUMB and __ARM_ARCH_ISA_ARM to

6
gcc/config/arm/arm-arches.def
View file

@ -62,6 +62,12 @@ ARM_ARCH("armv8.1-a", cortexa53, 8A,
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-m.base", cortexm0, 8M_BASE,
ARM_FSET_MAKE_CPU1 ( FL_FOR_ARCH8M_BASE))
ARM_ARCH("armv8-m.main", cortexm7, 8M_MAIN,
ARM_FSET_MAKE_CPU1(FL_CO_PROC | FL_FOR_ARCH8M_MAIN))
ARM_ARCH("armv8-m.main+dsp", cortexm7, 8M_MAIN,
ARM_FSET_MAKE_CPU1(FL_CO_PROC | FL_ARCH7EM | FL_FOR_ARCH8M_MAIN))
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))

2
gcc/config/arm/arm-protos.h
View file

@ -421,6 +421,8 @@ 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 FL_FOR_ARCH8M_BASE (FL_FOR_ARCH6M | FL_ARCH8 | FL_THUMB_DIV)
#define FL_FOR_ARCH8M_MAIN (FL_FOR_ARCH7M | FL_ARCH8)
/* 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

13
gcc/config/arm/arm-tables.opt
View file

@ -437,10 +437,19 @@ EnumValue
Enum(arm_arch) String(armv8.1-a+crc) Value(28)
EnumValue
Enum(arm_arch) String(iwmmxt) Value(29)
Enum(arm_arch) String(armv8-m.base) Value(29)
EnumValue
Enum(arm_arch) String(iwmmxt2) Value(30)
Enum(arm_arch) String(armv8-m.main) Value(30)
EnumValue
Enum(arm_arch) String(armv8-m.main+dsp) Value(31)
EnumValue
Enum(arm_arch) String(iwmmxt) Value(32)
EnumValue
Enum(arm_arch) String(iwmmxt2) Value(33)
Enum
Name(arm_fpu) Type(int)

14
gcc/config/arm/arm.c
View file

@ -2307,9 +2307,11 @@ static const struct processors *arm_selected_arch;
static const struct processors *arm_selected_cpu;
static const struct processors *arm_selected_tune;
/* The name of the preprocessor macro to define for this architecture. */
/* The name of the preprocessor macro to define for this architecture. PROFILE
is replaced by the architecture name (eg. 8A) in arm_option_override () and
is thus chosen to be big enough to hold the longest architecture name. */
char arm_arch_name[] = "__ARM_ARCH_0UNK__";
char arm_arch_name[] = "__ARM_ARCH_PROFILE__";
/* Available values for -mfpu=. */
@ -2950,7 +2952,8 @@ arm_option_override_internal (struct gcc_options *opts,
if (! opts_set->x_arm_restrict_it)
opts->x_arm_restrict_it = arm_arch8;
if (!TARGET_THUMB2_P (opts->x_target_flags))
/* ARM execution state and M profile don't have [restrict] IT. */
if (!TARGET_THUMB2_P (opts->x_target_flags) || !arm_arch_notm)
opts->x_arm_restrict_it = 0;
/* Enable -munaligned-access by default for
@ -2961,7 +2964,8 @@ arm_option_override_internal (struct gcc_options *opts,
Disable -munaligned-access by default for
- all pre-ARMv6 architecture-based processors
- ARMv6-M architecture-based processors. */
- ARMv6-M architecture-based processors
- ARMv8-M Baseline processors. */
if (! opts_set->x_unaligned_access)
{
@ -26005,7 +26009,7 @@ arm_file_start (void)
const char* pos = strchr (arm_selected_arch->name, '+');
if (pos)
{
char buf[15];
char buf[32];
gcc_assert (strlen (arm_selected_arch->name)
<= sizeof (buf) / sizeof (*pos));
strncpy (buf, arm_selected_arch->name,

6
gcc/config/arm/arm.h
View file

@ -261,7 +261,7 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
|| arm_arch7) && arm_arch_notm)
/* Nonzero if this chip supports load-acquire and store-release. */
#define TARGET_HAVE_LDACQ (TARGET_ARM_ARCH >= 8)
#define TARGET_HAVE_LDACQ (TARGET_ARM_ARCH >= 8 && arm_arch_notm)
/* Nonzero if integer division instructions supported. */
#define TARGET_IDIV ((TARGET_ARM && arm_arch_arm_hwdiv) \
@ -398,7 +398,9 @@ enum base_architecture
BASE_ARCH_7R = 7,
BASE_ARCH_7M = 7,
BASE_ARCH_7EM = 7,
BASE_ARCH_8A = 8
BASE_ARCH_8A = 8,
BASE_ARCH_8M_BASE = 8,
BASE_ARCH_8M_MAIN = 8
};
/* The major revision number of the ARM Architecture implemented by the target. */

6
gcc/config/arm/bpabi.h
View file

@ -93,6 +93,9 @@
|march=armv8-a+crc \
|march=armv8.1-a \
|march=armv8.1-a+crc \
|march=armv8-m.base \
|march=armv8-m.main \
|march=armv8-m.main+dsp \
:%{!r:--be8}}}"
#else
#define BE8_LINK_SPEC \
@ -127,6 +130,9 @@
|march=armv8-a+crc \
|march=armv8.1-a \
|march=armv8.1-a+crc \
|march=armv8-m.base \
|march=armv8-m.main \
|march=armv8-m.main+dsp \
:%{!r:--be8}}}"
#endif

11
gcc/doc/invoke.texi
View file

@ -14148,7 +14148,8 @@ of the @option{-mcpu=} option. Permissible names are: @samp{armv2},
@samp{armv6t2}, @samp{armv6z}, @samp{armv6zk},
@samp{armv7}, @samp{armv7-a}, @samp{armv7-m}, @samp{armv7-r}, @samp{armv7e-m},
@samp{armv7ve}, @samp{armv8-a}, @samp{armv8-a+crc}, @samp{armv8.1-a},
@samp{armv8.1-a+crc}, @samp{iwmmxt}, @samp{iwmmxt2}.
@samp{armv8.1-a+crc}, @samp{armv8-m.base}, @samp{armv8-m.main},
@samp{armv8-m.main+dsp}, @samp{iwmmxt}, @samp{iwmmxt2}.
Architecture revisions older than @samp{armv4t} are deprecated.
@ -14460,10 +14461,10 @@ generating these instructions. This option is enabled by default when
@opindex mno-unaligned-access
Enables (or disables) reading and writing of 16- and 32- bit values
from addresses that are not 16- or 32- bit aligned. By default
unaligned access is disabled for all pre-ARMv6 and all ARMv6-M
architectures, and enabled for all other architectures. If unaligned
access is not enabled then words in packed data structures are
accessed a byte at a time.
unaligned access is disabled for all pre-ARMv6, all ARMv6-M and for
ARMv8-M Baseline architectures, and enabled for all other
architectures. If unaligned access is not enabled then words in packed
data structures are accessed a byte at a time.
The ARM attribute @code{Tag_CPU_unaligned_access} is set in the
generated object file to either true or false, depending upon the

6
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,9 @@
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* lib/target-supports.exp: Generate add_options_for_arm_arch_FUNC and
check_effective_target_arm_arch_FUNC_multilib for ARMv8-M Baseline and
ARMv8-M Mainline architectures.
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* lib/target-supports.exp (check_effective_target_arm_cortex_m): Use

4
gcc/testsuite/lib/target-supports.exp
View file

@ -3348,7 +3348,9 @@ foreach { armfunc armflag armdef } { v4 "-march=armv4 -marm" __ARM_ARCH_4__
v7m "-march=armv7-m -mthumb" __ARM_ARCH_7M__
v7em "-march=armv7e-m -mthumb" __ARM_ARCH_7EM__
v8a "-march=armv8-a" __ARM_ARCH_8A__
v8_1a "-march=armv8.1a" __ARM_ARCH_8A__ } {
v8_1a "-march=armv8.1a" __ARM_ARCH_8A__
v8m_base "-march=armv8-m.base -mthumb" __ARM_ARCH_8M_BASE__
v8m_main "-march=armv8-m.main -mthumb" __ARM_ARCH_8M_MAIN__ } {
eval [string map [list FUNC $armfunc FLAG $armflag DEF $armdef ] {
proc check_effective_target_arm_arch_FUNC_ok { } {
if { [ string match "*-marm*" "FLAG" ] &&

4
libgcc/ChangeLog
View file

@ -1,3 +1,7 @@
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/lib1funcs.S (__ARM_ARCH__): Define to 8 for ARMv8-M.
2016-07-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/lib1funcs.S (HAVE_ARM_CLZ): Define for ARMv6* or later

3
libgcc/config/arm/lib1funcs.S
View file

@ -108,7 +108,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
# define __ARM_ARCH__ 7
#endif
#if defined(__ARM_ARCH_8A__)
#if defined(__ARM_ARCH_8A__) || defined(__ARM_ARCH_8M_BASE__) \
|| defined(__ARM_ARCH_8M_MAIN__)
# define __ARM_ARCH__ 8
#endif