return retval;
}
-static void initialize_aarch64_code_model (void);
+static void initialize_aarch64_code_model (struct gcc_options *);
-/* Parse the architecture extension string. */
+/* Enum describing the various ways that the
+ aarch64_parse_{arch,tune,cpu,extension} functions can fail.
+ This way their callers can choose what kind of error to give. */
-static void
-aarch64_parse_extension (char *str)
+enum aarch64_parse_opt_result
+{
+ AARCH64_PARSE_OK, /* Parsing was successful. */
+ AARCH64_PARSE_MISSING_ARG, /* Missing argument. */
+ AARCH64_PARSE_INVALID_FEATURE, /* Invalid feature modifier. */
+ AARCH64_PARSE_INVALID_ARG /* Invalid arch, tune, cpu arg. */
+};
+
+/* Parse the architecture extension string STR and update ISA_FLAGS
+ with the architecture features turned on or off. Return a
+ aarch64_parse_opt_result describing the result. */
+
+static enum aarch64_parse_opt_result
+aarch64_parse_extension (char *str, unsigned long *isa_flags)
{
/* The extension string is parsed left to right. */
const struct aarch64_option_extension *opt = NULL;
adding_ext = 1;
if (len == 0)
- {
- error ("missing feature modifier after %qs", adding_ext ? "+"
- : "+no");
- return;
- }
+ return AARCH64_PARSE_MISSING_ARG;
+
/* Scan over the extensions table trying to find an exact match. */
for (opt = all_extensions; opt->name != NULL; opt++)
{
/* Add or remove the extension. */
if (adding_ext)
- aarch64_isa_flags |= opt->flags_on;
+ *isa_flags |= opt->flags_on;
else
- aarch64_isa_flags &= ~(opt->flags_off);
+ *isa_flags &= ~(opt->flags_off);
break;
}
}
if (opt->name == NULL)
{
/* Extension not found in list. */
- error ("unknown feature modifier %qs", str);
- return;
+ return AARCH64_PARSE_INVALID_FEATURE;
}
str = ext;
};
- return;
+ return AARCH64_PARSE_OK;
}
-/* Parse the ARCH string. */
+/* Parse the TO_PARSE string and put the architecture struct that it
+ selects into RES and the architectural features into ISA_FLAGS.
+ Return an aarch64_parse_opt_result describing the parse result.
+ If there is an error parsing, RES and ISA_FLAGS are left unchanged. */
-static void
-aarch64_parse_arch (void)
+static enum aarch64_parse_opt_result
+aarch64_parse_arch (const char *to_parse, const struct processor **res,
+ unsigned long *isa_flags)
{
char *ext;
const struct processor *arch;
- char *str = (char *) alloca (strlen (aarch64_arch_string) + 1);
+ char *str = (char *) alloca (strlen (to_parse) + 1);
size_t len;
- strcpy (str, aarch64_arch_string);
+ strcpy (str, to_parse);
ext = strchr (str, '+');
len = strlen (str);
if (len == 0)
- {
- error ("missing arch name in -march=%qs", str);
- return;
- }
+ return AARCH64_PARSE_MISSING_ARG;
+
- /* Loop through the list of supported ARCHs to find a match. */
+ /* Loop through the list of supported ARCHes to find a match. */
for (arch = all_architectures; arch->name != NULL; arch++)
{
if (strlen (arch->name) == len && strncmp (arch->name, str, len) == 0)
{
- selected_arch = arch;
- aarch64_isa_flags = selected_arch->flags;
-
- if (!selected_cpu)
- selected_cpu = &all_cores[selected_arch->ident];
+ unsigned long isa_temp = arch->flags;
if (ext != NULL)
{
- /* ARCH string contains at least one extension. */
- aarch64_parse_extension (ext);
- }
+ /* TO_PARSE string contains at least one extension. */
+ enum aarch64_parse_opt_result ext_res
+ = aarch64_parse_extension (ext, &isa_temp);
- if (selected_arch->arch != selected_cpu->arch)
- {
- warning (0, "switch -mcpu=%s conflicts with -march=%s switch",
- all_architectures[selected_cpu->arch].name,
- selected_arch->name);
+ if (ext_res != AARCH64_PARSE_OK)
+ return ext_res;
}
-
- return;
+ /* Extension parsing was successful. Confirm the result
+ arch and ISA flags. */
+ *res = arch;
+ *isa_flags = isa_temp;
+ return AARCH64_PARSE_OK;
}
}
/* ARCH name not found in list. */
- error ("unknown value %qs for -march", str);
- return;
+ return AARCH64_PARSE_INVALID_ARG;
}
-/* Parse the CPU string. */
+/* Parse the TO_PARSE string and put the result tuning in RES and the
+ architecture flags in ISA_FLAGS. Return an aarch64_parse_opt_result
+ describing the parse result. If there is an error parsing, RES and
+ ISA_FLAGS are left unchanged. */
-static void
-aarch64_parse_cpu (void)
+static enum aarch64_parse_opt_result
+aarch64_parse_cpu (const char *to_parse, const struct processor **res,
+ unsigned long *isa_flags)
{
char *ext;
const struct processor *cpu;
- char *str = (char *) alloca (strlen (aarch64_cpu_string) + 1);
+ char *str = (char *) alloca (strlen (to_parse) + 1);
size_t len;
- strcpy (str, aarch64_cpu_string);
+ strcpy (str, to_parse);
ext = strchr (str, '+');
len = strlen (str);
if (len == 0)
- {
- error ("missing cpu name in -mcpu=%qs", str);
- return;
- }
+ return AARCH64_PARSE_MISSING_ARG;
+
/* Loop through the list of supported CPUs to find a match. */
for (cpu = all_cores; cpu->name != NULL; cpu++)
{
if (strlen (cpu->name) == len && strncmp (cpu->name, str, len) == 0)
{
- selected_cpu = cpu;
- aarch64_isa_flags = selected_cpu->flags;
+ unsigned long isa_temp = cpu->flags;
+
if (ext != NULL)
{
- /* CPU string contains at least one extension. */
- aarch64_parse_extension (ext);
- }
+ /* TO_PARSE string contains at least one extension. */
+ enum aarch64_parse_opt_result ext_res
+ = aarch64_parse_extension (ext, &isa_temp);
- return;
+ if (ext_res != AARCH64_PARSE_OK)
+ return ext_res;
+ }
+ /* Extension parsing was successfull. Confirm the result
+ cpu and ISA flags. */
+ *res = cpu;
+ *isa_flags = isa_temp;
+ return AARCH64_PARSE_OK;
}
}
/* CPU name not found in list. */
- error ("unknown value %qs for -mcpu", str);
- return;
+ return AARCH64_PARSE_INVALID_ARG;
}
-/* Parse the TUNE string. */
+/* Parse the TO_PARSE string and put the cpu it selects into RES.
+ Return an aarch64_parse_opt_result describing the parse result.
+ If the parsing fails the RES does not change. */
-static void
-aarch64_parse_tune (void)
+static enum aarch64_parse_opt_result
+aarch64_parse_tune (const char *to_parse, const struct processor **res)
{
const struct processor *cpu;
- char *str = (char *) alloca (strlen (aarch64_tune_string) + 1);
- strcpy (str, aarch64_tune_string);
+ char *str = (char *) alloca (strlen (to_parse) + 1);
+
+ strcpy (str, to_parse);
/* Loop through the list of supported CPUs to find a match. */
for (cpu = all_cores; cpu->name != NULL; cpu++)
{
if (strcmp (cpu->name, str) == 0)
{
- selected_tune = cpu;
- return;
+ *res = cpu;
+ return AARCH64_PARSE_OK;
}
}
/* CPU name not found in list. */
- error ("unknown value %qs for -mtune", str);
- return;
+ return AARCH64_PARSE_INVALID_ARG;
}
/* Parse TOKEN, which has length LENGTH to see if it is an option
free (string_root);
}
-/* Implement TARGET_OPTION_OVERRIDE. */
static void
-aarch64_override_options (void)
+aarch64_override_options_after_change_1 (struct gcc_options *opts)
{
- /* -mcpu=CPU is shorthand for -march=ARCH_FOR_CPU, -mtune=CPU.
- If either of -march or -mtune is given, they override their
- respective component of -mcpu.
+ if (opts->x_flag_omit_frame_pointer)
+ opts->x_flag_omit_leaf_frame_pointer = false;
+ else if (opts->x_flag_omit_leaf_frame_pointer)
+ opts->x_flag_omit_frame_pointer = true;
- So, first parse AARCH64_CPU_STRING, then the others, be careful
- with -march as, if -mcpu is not present on the command line, march
- must set a sensible default CPU. */
- if (aarch64_cpu_string)
+ /* If not opzimizing for size, set the default
+ alignment to what the target wants. */
+ if (!opts->x_optimize_size)
{
- aarch64_parse_cpu ();
+ if (opts->x_align_loops <= 0)
+ opts->x_align_loops = aarch64_tune_params.loop_align;
+ if (opts->x_align_jumps <= 0)
+ opts->x_align_jumps = aarch64_tune_params.jump_align;
+ if (opts->x_align_functions <= 0)
+ opts->x_align_functions = aarch64_tune_params.function_align;
}
+}
- if (aarch64_arch_string)
+/* 'Unpack' up the internal tuning structs and update the options
+ in OPTS. The caller must have set up selected_tune and selected_arch
+ as all the other target-specific codegen decisions are
+ derived from them. */
+
+static void
+aarch64_override_options_internal (struct gcc_options *opts)
+{
+ aarch64_tune_flags = selected_tune->flags;
+ aarch64_tune = selected_tune->sched_core;
+ /* Make a copy of the tuning parameters attached to the core, which
+ we may later overwrite. */
+ aarch64_tune_params = *(selected_tune->tune);
+ aarch64_architecture_version = selected_arch->architecture_version;
+
+ if (opts->x_aarch64_override_tune_string)
+ aarch64_parse_override_string (opts->x_aarch64_override_tune_string,
+ &aarch64_tune_params);
+
+ /* This target defaults to strict volatile bitfields. */
+ if (opts->x_flag_strict_volatile_bitfields < 0 && abi_version_at_least (2))
+ opts->x_flag_strict_volatile_bitfields = 1;
+
+ if (opts->x_aarch64_fix_a53_err835769 == 2)
{
- aarch64_parse_arch ();
+#ifdef TARGET_FIX_ERR_A53_835769_DEFAULT
+ opts->x_aarch64_fix_a53_err835769 = 1;
+#else
+ opts->x_aarch64_fix_a53_err835769 = 0;
+#endif
}
- if (aarch64_tune_string)
+ /* -mgeneral-regs-only sets a mask in target_flags, make sure that
+ aarch64_isa_flags does not contain the FP/SIMD/Crypto feature flags
+ in case some code tries reading aarch64_isa_flags directly to check if
+ FP is available. Reuse the aarch64_parse_extension machinery since it
+ knows how to disable any other flags that fp implies. */
+ if (TARGET_GENERAL_REGS_ONLY_P (opts->x_target_flags))
{
- aarch64_parse_tune ();
+ /* aarch64_parse_extension takes char* rather than const char* because
+ it is usually called from within other parsing functions. */
+ char tmp_str[] = "+nofp";
+ aarch64_parse_extension (tmp_str, &aarch64_isa_flags);
}
-#ifndef HAVE_AS_MABI_OPTION
- /* The compiler may have been configured with 2.23.* binutils, which does
- not have support for ILP32. */
- if (TARGET_ILP32)
- error ("Assembler does not support -mabi=ilp32");
-#endif
+ initialize_aarch64_code_model (opts);
- initialize_aarch64_code_model ();
+ aarch64_override_options_after_change_1 (opts);
+}
- aarch64_build_bitmask_table ();
+/* Validate a command-line -mcpu option. Parse the cpu and extensions (if any)
+ specified in STR and throw errors if appropriate. Put the results if
+ they are valid in RES and ISA_FLAGS. */
- /* This target defaults to strict volatile bitfields. */
- if (flag_strict_volatile_bitfields < 0 && abi_version_at_least (2))
- flag_strict_volatile_bitfields = 1;
+static void
+aarch64_validate_mcpu (const char *str, const struct processor **res,
+ unsigned long *isa_flags)
+{
+ enum aarch64_parse_opt_result parse_res
+ = aarch64_parse_cpu (str, res, isa_flags);
+
+ if (parse_res == AARCH64_PARSE_OK)
+ return;
+
+ switch (parse_res)
+ {
+ case AARCH64_PARSE_MISSING_ARG:
+ error ("missing cpu name in -mcpu=%qs", str);
+ break;
+ case AARCH64_PARSE_INVALID_ARG:
+ error ("unknown value %qs for -mcpu", str);
+ break;
+ case AARCH64_PARSE_INVALID_FEATURE:
+ error ("invalid feature modifier in -mcpu=%qs", str);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Validate a command-line -march option. Parse the arch and extensions
+ (if any) specified in STR and throw errors if appropriate. Put the
+ results, if they are valid, in RES and ISA_FLAGS. */
+
+static void
+aarch64_validate_march (const char *str, const struct processor **res,
+ unsigned long *isa_flags)
+{
+ enum aarch64_parse_opt_result parse_res
+ = aarch64_parse_arch (str, res, isa_flags);
+
+ if (parse_res == AARCH64_PARSE_OK)
+ return;
+
+ switch (parse_res)
+ {
+ case AARCH64_PARSE_MISSING_ARG:
+ error ("missing arch name in -march=%qs", str);
+ break;
+ case AARCH64_PARSE_INVALID_ARG:
+ error ("unknown value %qs for -march", str);
+ break;
+ case AARCH64_PARSE_INVALID_FEATURE:
+ error ("invalid feature modifier in -march=%qs", str);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Validate a command-line -mtune option. Parse the cpu
+ specified in STR and throw errors if appropriate. Put the
+ result, if it is valid, in RES. */
+
+static void
+aarch64_validate_mtune (const char *str, const struct processor **res)
+{
+ enum aarch64_parse_opt_result parse_res
+ = aarch64_parse_tune (str, res);
+
+ if (parse_res == AARCH64_PARSE_OK)
+ return;
+
+ switch (parse_res)
+ {
+ case AARCH64_PARSE_MISSING_ARG:
+ error ("missing cpu name in -mtune=%qs", str);
+ break;
+ case AARCH64_PARSE_INVALID_ARG:
+ error ("unknown value %qs for -mtune", str);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Implement TARGET_OPTION_OVERRIDE. This is called once in the beginning
+ and is used to parse the -m{cpu,tune,arch} strings and setup the initial
+ tuning structs. In particular it must set selected_tune and
+ aarch64_isa_flags that define the available ISA features and tuning
+ decisions. It must also set selected_arch as this will be used to
+ output the .arch asm tags for each function. */
+
+static void
+aarch64_override_options (void)
+{
+ unsigned long cpu_isa = 0;
+ unsigned long arch_isa = 0;
+ aarch64_isa_flags = 0;
+
+ selected_cpu = NULL;
+ selected_arch = NULL;
+ selected_tune = NULL;
+
+ /* -mcpu=CPU is shorthand for -march=ARCH_FOR_CPU, -mtune=CPU.
+ If either of -march or -mtune is given, they override their
+ respective component of -mcpu. */
+ if (aarch64_cpu_string)
+ aarch64_validate_mcpu (aarch64_cpu_string, &selected_cpu, &cpu_isa);
+
+ if (aarch64_arch_string)
+ aarch64_validate_march (aarch64_arch_string, &selected_arch, &arch_isa);
+
+ if (aarch64_tune_string)
+ aarch64_validate_mtune (aarch64_tune_string, &selected_tune);
/* If the user did not specify a processor, choose the default
one for them. This will be the CPU set during configuration using
--with-cpu, otherwise it is "generic". */
if (!selected_cpu)
{
- selected_cpu = &all_cores[TARGET_CPU_DEFAULT & 0x3f];
- aarch64_isa_flags = TARGET_CPU_DEFAULT >> 6;
+ if (selected_arch)
+ {
+ selected_cpu = &all_cores[selected_arch->ident];
+ aarch64_isa_flags = arch_isa;
+ }
+ else
+ {
+ selected_cpu = &all_cores[TARGET_CPU_DEFAULT & 0x3f];
+ aarch64_isa_flags = TARGET_CPU_DEFAULT >> 6;
+ }
+ }
+ /* If both -mcpu and -march are specified check that they are architecturally
+ compatible, warn if they're not and prefer the -march ISA flags. */
+ else if (selected_arch)
+ {
+ if (selected_arch->arch != selected_cpu->arch)
+ {
+ warning (0, "switch -mcpu=%s conflicts with -march=%s switch",
+ all_architectures[selected_cpu->arch].name,
+ selected_arch->name);
+ }
+ aarch64_isa_flags = arch_isa;
+ }
+ else
+ {
+ /* -mcpu but no -march. */
+ aarch64_isa_flags = cpu_isa;
}
- gcc_assert (selected_cpu);
+ /* Set the arch as well as we will need it when outputing
+ the .arch directive in assembly. */
+ if (!selected_arch)
+ {
+ gcc_assert (selected_cpu);
+ selected_arch = &all_architectures[selected_cpu->arch];
+ }
if (!selected_tune)
selected_tune = selected_cpu;
- aarch64_tune_flags = selected_tune->flags;
- aarch64_tune = selected_tune->sched_core;
- /* Make a copy of the tuning parameters attached to the core, which
- we may later overwrite. */
- aarch64_tune_params = *(selected_tune->tune);
- aarch64_architecture_version = selected_cpu->architecture_version;
+#ifndef HAVE_AS_MABI_OPTION
+ /* The compiler may have been configured with 2.23.* binutils, which does
+ not have support for ILP32. */
+ if (TARGET_ILP32)
+ error ("Assembler does not support -mabi=ilp32");
+#endif
- if (aarch64_override_tune_string)
- aarch64_parse_override_string (aarch64_override_tune_string,
- &aarch64_tune_params);
+ aarch64_build_bitmask_table ();
- if (aarch64_fix_a53_err835769 == 2)
- {
-#ifdef TARGET_FIX_ERR_A53_835769_DEFAULT
- aarch64_fix_a53_err835769 = 1;
-#else
- aarch64_fix_a53_err835769 = 0;
-#endif
- }
+ aarch64_override_options_internal (&global_options);
+
+ /* Save these options as the default ones in case we push and pop them later
+ while processing functions with potential target attributes. */
+ target_option_default_node = target_option_current_node
+ = build_target_option_node (&global_options);
aarch64_register_fma_steering ();
- aarch64_override_options_after_change ();
}
/* Implement targetm.override_options_after_change. */
static void
aarch64_override_options_after_change (void)
{
- if (flag_omit_frame_pointer)
- flag_omit_leaf_frame_pointer = false;
- else if (flag_omit_leaf_frame_pointer)
- flag_omit_frame_pointer = true;
-
- /* If not optimizing for size, set the default
- alignment to what the target wants */
- if (!optimize_size)
- {
- if (align_loops <= 0)
- align_loops = aarch64_tune_params.loop_align;
- if (align_jumps <= 0)
- align_jumps = aarch64_tune_params.jump_align;
- if (align_functions <= 0)
- align_functions = aarch64_tune_params.function_align;
- }
+ aarch64_override_options_after_change_1 (&global_options);
}
static struct machine_function *
/* A checking mechanism for the implementation of the various code models. */
static void
-initialize_aarch64_code_model (void)
+initialize_aarch64_code_model (struct gcc_options *opts)
{
- if (flag_pic)
+ if (opts->x_flag_pic)
{
- switch (aarch64_cmodel_var)
+ switch (opts->x_aarch64_cmodel_var)
{
case AARCH64_CMODEL_TINY:
aarch64_cmodel = AARCH64_CMODEL_TINY_PIC;
break;
case AARCH64_CMODEL_LARGE:
sorry ("code model %qs with -f%s", "large",
- flag_pic > 1 ? "PIC" : "pic");
+ opts->x_flag_pic > 1 ? "PIC" : "pic");
default:
gcc_unreachable ();
}
}
else
- aarch64_cmodel = aarch64_cmodel_var;
+ aarch64_cmodel = opts->x_aarch64_cmodel_var;
}
/* Return true if SYMBOL_REF X binds locally. */
projects / gcc.git / commitdiff