gcc/libatomic/fenv.c

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2021-01-04 10:26:59 +01:00
/* Copyright (C) 2012-2021 Free Software Foundation, Inc.
tree-core.h (enum cv_qualifier): Add TYPE_QUAL_ATOMIC. gcc: 2013-11-05 Andrew MacLeod <amacleod@redhat.com> Joseph Myers <joseph@codesourcery.com> * tree-core.h (enum cv_qualifier): Add TYPE_QUAL_ATOMIC. (enum tree_index): Add TI_ATOMICQI_TYPE, TI_ATOMICHI_TYPE, TI_ATOMICSI_TYPE, TI_ATOMICDI_TYPE and TI_ATOMICTI_TYPE. (struct tree_base): Add atomic_flag field. * tree.h (TYPE_ATOMIC): New accessor macro. (TYPE_QUALS, TYPE_QUALS_NO_ADDR_SPACE): Add TYPE_QUAL_ATOMIC. (TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC): New macro. (atomicQI_type_node, atomicHI_type_node, atomicSI_type_node) (atomicDI_type_node, atomicTI_type_node): New macros for type nodes. * tree.c (set_type_quals): Set TYPE_ATOMIC. (find_atomic_core_type): New function. (build_qualified_type): Adjust alignment for qualified types. (build_atomic_base): New function (build_common_tree_nodes): Build atomicQI_type_node, atomicHI_type_node, atomicSI_type_node, atomicDI_type_node and atomicTI_type_node. * print-tree.c (print_node): Print atomic qualifier. * tree-pretty-print.c (dump_generic_node): Print atomic type attribute. * target.def (atomic_assign_expand_fenv): New hook. * doc/tm.texi.in (TARGET_ATOMIC_ASSIGN_EXPAND_FENV): New @hook. * doc/tm.texi: Regenerate. * targhooks.c (default_atomic_assign_expand_fenv): New function. * targhooks.h (default_atomic_assign_expand_fenv): Declare. * sync-builtins.def (__atomic_feraiseexcept): New built-in function. * config/i386/i386-builtin-types.def (VOID_FTYPE_PUSHORT): New function type. * config/i386/i386.c (enum ix86_builtins): Add IX86_BUILTIN_FNSTENV, IX86_BUILTIN_FLDENV, IX86_BUILTIN_FNSTSW and IX86_BUILTIN_FNCLEX. (bdesc_special_args): Add __builtin_ia32_fnstenv, __builtin_ia32_fldenv, __builtin_ia32_fnstsw and __builtin_ia32_fnclex. (ix86_expand_builtin): Handle the new built-in functions. (ix86_atomic_assign_expand_fenv): New function. (TARGET_ATOMIC_ASSIGN_EXPAND_FENV): New macro. * config/i386/i386.md (UNSPECV_FNSTENV, UNSPECV_FLDENV) (UNSPECV_FNSTSW, UNSPECV_FNCLEX): New unspecs. (fnstenv, fldenv, fnstsw, fnclex): New insns. gcc/c-family: 2013-11-05 Andrew MacLeod <amacleod@redhat.com> Joseph Myers <joseph@codesourcery.com> * c-common.h (enum rid): Add RID_ATOMIC. * c-common.c (c_common_reswords): Add _Atomic. (sync_resolve_params): Use TYPE_MAIN_VARIANT on pointer argument. (keyword_is_type_qualifier): Accept RID_ATOMIC. * c-format.c (check_format_types): Check for extra _Atomic qualifiers in format argument. * c-pretty-print.c (pp_c_cv_qualifiers): Handle atomic qualifier. (pp_c_type_qualifier_list): Mention _Atomic in comment. gcc/c: 2013-11-05 Joseph Myers <joseph@codesourcery.com> Andrew MacLeod <amacleod@redhat.com> * c-aux-info.c (gen_type): Handle atomic qualifier. * c-decl.c (validate_proto_after_old_defn): Do not remove atomic qualifiers when compating types. (shadow_tag_warned): Handle atomic_p in declspecs. (quals_from_declspecs): Likewise. (start_decl): Use c_type_promotes_to when promoting argument types. (grokdeclarator): Handle _Atomic. (get_parm_info): Diagnose any qualifier on "void" as only parameter. (store_parm_decls_oldstyle): Do not remove atomic qualifiers when comparing types. Use c_type_promotes_to when promoting argument types. (finish_function): Use c_type_promotes_to when promoting argument types. (build_null_declspecs): Handle atomic_p in declspecs. (declspecs_add_qual): Handle RID_ATOMIC. * c-parser.c (c_token_starts_typename, c_token_is_qualifier) (c_token_starts_declspecs): Handle RID_ATOMIC. (c_parser_declspecs): Handle atomic type specifiers and qualifiers. (c_parser_typeof_specifier): Remove const and _Atomic qualifiers from types of expressions with atomic type. (c_parser_direct_declarator_inner): Use convert_lvalue_to_rvalue. (c_parser_attribute_any_word): Handle RID_ATOMIC. (c_parser_initializer, c_parser_initelt, c_parser_initval) (c_parser_statement_after_labels, c_parser_switch_statement) (c_parser_for_statement, c_parser_expr_no_commas) (c_parser_conditional_expression, c_parser_binary_expression) (c_parser_cast_expression, c_parser_unary_expression) (c_parser_postfix_expression) (c_parser_postfix_expression_after_primary, c_parser_expression): Use convert_lvalue_to_rvalue. (c_parser_expression_conv, c_parser_expr_list): Document conversion of lvalues to rvalues. Use convert_lvalue_to_rvalue. (c_parser_objc_synchronized_statement): Use convert_lvalue_to_rvalue. (c_parser_objc_selector): Handle RID_ATOMIC. (c_parser_objc_receiver, c_parser_array_notation): Use convert_lvalue_to_rvalue. * c-tree.h (ctsk_typeof): Adjust comment to mention use for _Atomic (type-name). (struct c_declspecs): Add atomic_p field. (convert_lvalue_to_rvalue): Declare. * c-typeck.c (c_type_promotes_to): Promote atomic types to corresponding atomic types. (qualify_type): Don't add _Atomic qualifiers from second argument. (comp_target_types): Do not allow _Atomic mismatches. (type_lists_compatible_p): Do not remove atomic qualifiers when comparing types. (really_atomic_lvalue, convert_lvalue_to_rvalue) (build_atomic_assign): New functions. (build_unary_op): Use build_atomic_assign for atomic increment and decrement. (build_conditional_expr): Do not treat _Atomic void as a qualified version of void. (build_modify_expr): Use build_atomic_assign for atomic LHS. (find_anonymous_field_with_type, convert_to_anonymous_field) (convert_for_assignment): Do not remove atomic qualifiers when comparing types. (digest_init): Do not accept initialization of arrays of atomic elements by string constants. (build_asm_expr): Use convert_lvalue_to_rvalue. (build_binary_op): Do not treat _Atomic void as a qualified version of void. gcc/objc: 2013-11-05 Andrew MacLeod <amacleod@redhat.com> * objc-act.c (objc_push_parm): Handle atomic qualifier. gcc/testsuite: 2013-11-05 Joseph Myers <joseph@codesourcery.com> * lib/target-supports.exp (check_effective_target_fenv_exceptions): New function. * lib/atomic-dg.exp, gcc.dg/atomic/atomic.exp: New files. * gcc.dg/atomic/c11-atomic-exec-1.c, gcc.dg/atomic/c11-atomic-exec-2.c, gcc.dg/atomic/c11-atomic-exec-3.c, gcc.dg/atomic/c11-atomic-exec-4.c, gcc.dg/atomic/c11-atomic-exec-5.c, gcc.dg/c11-atomic-1.c, gcc.dg/c11-atomic-2.c, gcc.dg/c11-atomic-3.c, gcc.dg/c90-atomic-1.c, gcc.dg/c99-atomic-1.c: New tests. libatomic: 2013-11-05 Joseph Myers <joseph@codesourcery.com> * fenv.c: New file. * libatomic.map (LIBATOMIC_1.1): New symbol version. Include __atomic_feraiseexcept. * configure.ac (libtool_VERSION): Change to 2:0:1. (fenv.h): Test for header. * Makefile.am (libatomic_la_SOURCES): Add fenv.c. * Makefile.in, auto-config.h.in, configure: Regenerate. From-SVN: r204544
2013-11-07 22:15:25 +01:00
This file is part of the GNU Atomic Library (libatomic).
Libatomic is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libatomic_i.h"
#ifdef HAVE_FENV_H
# include <fenv.h>
#endif
/* Raise the supported floating-point exceptions from EXCEPTS. Other
bits in EXCEPTS are ignored. */
void
__atomic_feraiseexcept (int excepts __attribute__ ((unused)))
{
volatile float r __attribute__ ((unused));
#ifdef FE_INVALID
if (excepts & FE_INVALID)
{
volatile float zero = 0.0f;
r = zero / zero;
}
#endif
#ifdef FE_DIVBYZERO
if (excepts & FE_DIVBYZERO)
{
volatile float zero = 0.0f;
r = 1.0f / zero;
}
#endif
#ifdef FE_OVERFLOW
if (excepts & FE_OVERFLOW)
{
volatile float max = __FLT_MAX__;
r = max * max;
}
#endif
#ifdef FE_UNDERFLOW
if (excepts & FE_UNDERFLOW)
{
volatile float min = __FLT_MIN__;
r = min * min;
}
#endif
#ifdef FE_INEXACT
if (excepts & FE_INEXACT)
{
volatile float three = 3.0f;
r = 1.0f / three;
}
#endif
}