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S/390: Implement TARGET_ATOMIC_ASSIGN_EXPAND_FENV. 

gcc/ChangeLog:
	* config/s390/s390.c: (s390_atomic_assign_expand_fenv): New
	function.
	(TARGET_ATOMIC_ASSIGN_EXPAND_FENV): Define macro.

From-SVN: r221048
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Andreas Krebbel 2015-02-27 10:15:36 +00:00 committed by Andreas Krebbel
parent 004f64e1b0
commit 35bc11c359
2 changed files with 83 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-02-27 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390.c: (s390_atomic_assign_expand_fenv): New
function.
(TARGET_ATOMIC_ASSIGN_EXPAND_FENV): Define macro.
2015-02-27 Andreas Krebbel <Andreas.Krebbel@de.ibm.com> 2015-02-27 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390.c (enum s390_builtin): * config/s390/s390.c (enum s390_builtin):

77
gcc/config/s390/s390.c
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@ -12139,6 +12139,80 @@ s390_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size,
|| size == 4 || (TARGET_ZARCH && size == 8)); || size == 4 || (TARGET_ZARCH && size == 8));
} }
/* Implement TARGET_ATOMIC_ASSIGN_EXPAND_FENV hook. */
static void
s390_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
{
tree sfpc = s390_builtin_decls[S390_BUILTIN_S390_SFPC];
tree efpc = s390_builtin_decls[S390_BUILTIN_S390_EFPC];
tree call_efpc = build_call_expr (efpc, 0);
tree fenv_var = create_tmp_var (unsigned_type_node);
#define FPC_EXCEPTION_MASK HOST_WIDE_INT_UC (0xf8000000)
#define FPC_FLAGS_MASK HOST_WIDE_INT_UC (0x00f80000)
#define FPC_DXC_MASK HOST_WIDE_INT_UC (0x0000ff00)
#define FPC_EXCEPTION_MASK_SHIFT HOST_WIDE_INT_UC (24)
#define FPC_FLAGS_SHIFT HOST_WIDE_INT_UC (16)
#define FPC_DXC_SHIFT HOST_WIDE_INT_UC (8)
/* Generates the equivalent of feholdexcept (&fenv_var)
fenv_var = __builtin_s390_efpc ();
__builtin_s390_sfpc (fenv_var & mask) */
tree old_fpc = build2 (MODIFY_EXPR, unsigned_type_node, fenv_var, call_efpc);
tree new_fpc =
build2 (BIT_AND_EXPR, unsigned_type_node, fenv_var,
build_int_cst (unsigned_type_node,
~(FPC_DXC_MASK | FPC_FLAGS_MASK |
FPC_EXCEPTION_MASK)));
tree set_new_fpc = build_call_expr (sfpc, 1, new_fpc);
*hold = build2 (COMPOUND_EXPR, void_type_node, old_fpc, set_new_fpc);
/* Generates the equivalent of feclearexcept (FE_ALL_EXCEPT)
__builtin_s390_sfpc (__builtin_s390_efpc () & mask) */
new_fpc = build2 (BIT_AND_EXPR, unsigned_type_node, call_efpc,
build_int_cst (unsigned_type_node,
~(FPC_DXC_MASK | FPC_FLAGS_MASK)));
*clear = build_call_expr (sfpc, 1, new_fpc);
/* Generates the equivalent of feupdateenv (fenv_var)
old_fpc = __builtin_s390_efpc ();
__builtin_s390_sfpc (fenv_var);
__atomic_feraiseexcept ((old_fpc & FPC_FLAGS_MASK) >> FPC_FLAGS_SHIFT); */
old_fpc = create_tmp_var (unsigned_type_node);
tree store_old_fpc = build2 (MODIFY_EXPR, void_type_node,
old_fpc, call_efpc);
set_new_fpc = build_call_expr (sfpc, 1, fenv_var);
tree raise_old_except = build2 (BIT_AND_EXPR, unsigned_type_node, old_fpc,
build_int_cst (unsigned_type_node,
FPC_FLAGS_MASK));
raise_old_except = build2 (RSHIFT_EXPR, unsigned_type_node, raise_old_except,
build_int_cst (unsigned_type_node,
FPC_FLAGS_SHIFT));
tree atomic_feraiseexcept
= builtin_decl_implicit (BUILT_IN_ATOMIC_FERAISEEXCEPT);
raise_old_except = build_call_expr (atomic_feraiseexcept,
1, raise_old_except);
*update = build2 (COMPOUND_EXPR, void_type_node,
build2 (COMPOUND_EXPR, void_type_node,
store_old_fpc, set_new_fpc),
raise_old_except);
#undef FPC_EXCEPTION_MASK
#undef FPC_FLAGS_MASK
#undef FPC_DXC_MASK
#undef FPC_EXCEPTION_MASK_SHIFT
#undef FPC_FLAGS_SHIFT
#undef FPC_DXC_SHIFT
}
/* Initialize GCC target structure. */ /* Initialize GCC target structure. */
#undef TARGET_ASM_ALIGNED_HI_OP #undef TARGET_ASM_ALIGNED_HI_OP
@ -12330,6 +12404,9 @@ s390_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size,
#define TARGET_USE_BY_PIECES_INFRASTRUCTURE_P \ #define TARGET_USE_BY_PIECES_INFRASTRUCTURE_P \
s390_use_by_pieces_infrastructure_p s390_use_by_pieces_infrastructure_p
#undef TARGET_ATOMIC_ASSIGN_EXPAND_FENV
#define TARGET_ATOMIC_ASSIGN_EXPAND_FENV s390_atomic_assign_expand_fenv
struct gcc_target targetm = TARGET_INITIALIZER; struct gcc_target targetm = TARGET_INITIALIZER;
#include "gt-s390.h" #include "gt-s390.h"