+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
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))
#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
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)
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=. */
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
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)
{
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,
|| 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) \
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. */
|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 \
|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
@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.
@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
+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
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" ] &&
+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
# 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
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