@@ -59,6 +59,7 @@
#include "params.h"
#include "opts.h"
#include "dumpfile.h"
+#include "gimple-expr.h"
/* Forward definitions of types. */
typedef struct minipool_node Mnode;
@@ -93,6 +94,7 @@ static int thumb_far_jump_used_p (void);
static bool thumb_force_lr_save (void);
static unsigned arm_size_return_regs (void);
static bool arm_assemble_integer (rtx, unsigned int, int);
+static void arm_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update);
static void arm_print_operand (FILE *, rtx, int);
static void arm_print_operand_address (FILE *, rtx);
static bool arm_print_operand_punct_valid_p (unsigned char code);
@@ -584,6 +586,9 @@ static const struct attribute_spec arm_attribute_table[] =
#undef TARGET_MANGLE_TYPE
#define TARGET_MANGLE_TYPE arm_mangle_type
+#undef TARGET_ATOMIC_ASSIGN_EXPAND_FENV
+#define TARGET_ATOMIC_ASSIGN_EXPAND_FENV arm_atomic_assign_expand_fenv
+
#undef TARGET_BUILD_BUILTIN_VA_LIST
#define TARGET_BUILD_BUILTIN_VA_LIST arm_build_builtin_va_list
#undef TARGET_EXPAND_BUILTIN_VA_START
@@ -23212,6 +23217,9 @@ enum arm_builtins
ARM_BUILTIN_CRC32CH,
ARM_BUILTIN_CRC32CW,
+ ARM_BUILTIN_GET_FPSCR,
+ ARM_BUILTIN_SET_FPSCR,
+
#undef CRYPTO1
#undef CRYPTO2
#undef CRYPTO3
@@ -24010,6 +24018,15 @@ static const struct builtin_description bdesc_2arg[] =
IWMMXT_BUILTIN2 (iwmmxt_wmacuz, WMACUZ)
IWMMXT_BUILTIN2 (iwmmxt_wmacsz, WMACSZ)
+
+#define FP_BUILTIN(L, U) \
+ {0, CODE_FOR_##L, "__builtin_arm_"#L, ARM_BUILTIN_##U, \
+ UNKNOWN, 0},
+
+ FP_BUILTIN (set_fpscr, GET_FPSCR)
+ FP_BUILTIN (get_fpscr, SET_FPSCR)
+#undef FP_BUILTIN
+
#define CRC32_BUILTIN(L, U) \
{0, CODE_FOR_##L, "__builtin_arm_"#L, ARM_BUILTIN_##U, \
UNKNOWN, 0},
@@ -24524,6 +24541,21 @@ arm_init_builtins (void)
if (TARGET_CRC32)
arm_init_crc32_builtins ();
+
+ if (TARGET_VFP)
+ {
+ tree ftype_set_fpscr
+ = build_function_type_list (void_type_node, unsigned_type_node, NULL);
+ tree ftype_get_fpscr
+ = build_function_type_list (unsigned_type_node, NULL);
+
+ arm_builtin_decls[ARM_BUILTIN_GET_FPSCR]
+ = add_builtin_function ("__builtin_arm_ldfscr", ftype_get_fpscr,
+ ARM_BUILTIN_GET_FPSCR, BUILT_IN_MD, NULL, NULL_TREE);
+ arm_builtin_decls[ARM_BUILTIN_SET_FPSCR]
+ = add_builtin_function ("__builtin_arm_stfscr", ftype_set_fpscr,
+ ARM_BUILTIN_SET_FPSCR, BUILT_IN_MD, NULL, NULL_TREE);
+ }
}
/* Return the ARM builtin for CODE. */
@@ -25251,6 +25283,25 @@ arm_expand_builtin (tree exp,
switch (fcode)
{
+ case ARM_BUILTIN_GET_FPSCR:
+ case ARM_BUILTIN_SET_FPSCR:
+ if (fcode == ARM_BUILTIN_GET_FPSCR)
+ {
+ icode = CODE_FOR_get_fpscr;
+ target = gen_reg_rtx (SImode);
+ pat = GEN_FCN (icode) (target);
+ }
+ else
+ {
+ target = NULL_RTX;
+ icode = CODE_FOR_set_fpscr;
+ arg0 = CALL_EXPR_ARG (exp, 0);
+ op0 = expand_normal (arg0);
+ pat = GEN_FCN (icode) (op0);
+ }
+ emit_insn (pat);
+ return target;
+
case ARM_BUILTIN_TEXTRMSB:
case ARM_BUILTIN_TEXTRMUB:
case ARM_BUILTIN_TEXTRMSH:
@@ -31116,4 +31167,73 @@ arm_asan_shadow_offset (void)
return (unsigned HOST_WIDE_INT) 1 << 29;
}
+static void
+arm_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
+{
+ const unsigned ARM_FE_INVALID = 1;
+ const unsigned ARM_FE_DIVBYZERO = 2;
+ const unsigned ARM_FE_OVERFLOW = 4;
+ const unsigned ARM_FE_UNDERFLOW = 8;
+ const unsigned ARM_FE_INEXACT = 16;
+ const unsigned HOST_WIDE_INT ARM_FE_ALL_EXCEPT = (ARM_FE_INVALID
+ | ARM_FE_DIVBYZERO
+ | ARM_FE_OVERFLOW
+ | ARM_FE_UNDERFLOW
+ | ARM_FE_INEXACT);
+ const unsigned HOST_WIDE_INT ARM_FE_EXCEPT_SHIFT = 8;
+ tree fenv_var, get_fpscr, set_fpscr, mask, ld_fenv, masked_fenv;
+ tree new_fenv_var, reload_fenv, restore_fnenv;
+ tree update_call, atomic_feraiseexcept, hold_fnclex;
+
+ if (!TARGET_VFP)
+ return;
+
+ /* Generate the equivalence of :
+ unsigned int fenv_var;
+ fenv_var = __builtin_arm_get_fpscr ();
+
+ unsigned int masked_fenv;
+ masked_fenv = fenv_var & mask;
+
+ __builtin_arm_set_fpscr (masked_fenv); */
+
+ fenv_var = create_tmp_var (unsigned_type_node, NULL);
+ get_fpscr = arm_builtin_decls[ARM_BUILTIN_GET_FPSCR];
+ set_fpscr = arm_builtin_decls[ARM_BUILTIN_SET_FPSCR];
+ mask = build_int_cst (unsigned_type_node,
+ ~((ARM_FE_ALL_EXCEPT << ARM_FE_EXCEPT_SHIFT)
+ | ARM_FE_ALL_EXCEPT));
+ ld_fenv = build2 (MODIFY_EXPR, unsigned_type_node,
+ fenv_var, build_call_expr (get_fpscr, 0));
+ masked_fenv = build2 (BIT_AND_EXPR, unsigned_type_node, fenv_var, mask);
+ hold_fnclex = build_call_expr (set_fpscr, 1, masked_fenv);
+ *hold = build2 (COMPOUND_EXPR, void_type_node,
+ build2 (COMPOUND_EXPR, void_type_node, masked_fenv, ld_fenv),
+ hold_fnclex);
+
+ /* Store the value of masked_fenv to clear the exceptions:
+ __builtin_arm_set_fpscr (masked_fenv); */
+
+ *clear = build_call_expr (set_fpscr, 1, masked_fenv);
+
+ /* Generate the equivalent of :
+ unsigned int new_fenv_var;
+ new_fenv_var = __builtin_arm_get_fpscr ();
+
+ __builtin_arm_set_fpscr (fenv_var);
+
+ __atomic_feraiseexcept (new_fenv_var); */
+
+ new_fenv_var = create_tmp_var (unsigned_type_node, NULL);
+ reload_fenv = build2 (MODIFY_EXPR, unsigned_type_node, new_fenv_var,
+ build_call_expr (get_fpscr, 0));
+ restore_fnenv = build_call_expr (set_fpscr, 1, fenv_var);
+ atomic_feraiseexcept = builtin_decl_implicit (BUILT_IN_ATOMIC_FERAISEEXCEPT);
+ update_call = build_call_expr (atomic_feraiseexcept, 1,
+ fold_convert (integer_type_node, new_fenv_var));
+ *update = build2 (COMPOUND_EXPR, void_type_node,
+ build2 (COMPOUND_EXPR, void_type_node,
+ reload_fenv, restore_fnenv), update_call);
+}
+
#include "gt-arm.h"
@@ -143,6 +143,8 @@
VUNSPEC_SLX ; Represent a store-register-release-exclusive.
VUNSPEC_LDA ; Represent a store-register-acquire.
VUNSPEC_STL ; Represent a store-register-release.
+ VUNSPEC_GET_FPSCR ; Represent fetch of FPSCR content.
+ VUNSPEC_SET_FPSCR ; Represent assign of FPSCR content.
])
;; Enumerators for NEON unspecs.
@@ -1322,6 +1322,22 @@
(set_attr "conds" "unconditional")]
)
+;; Write Floating-point Status and Control Register.
+(define_insn "set_fpscr"
+ [(unspec_volatile [(match_operand:SI 0 "register_operand" "r")] VUNSPEC_SET_FPSCR)]
+ "TARGET_VFP"
+ "mcr\\tp10, 7, %0, cr1, cr0, 0\\t @SET_FPSCR"
+ [(set_attr "type" "mrs")])
+
+;; Read Floating-point Status and Control Register.
+(define_insn "get_fpscr"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (unspec_volatile:SI [(const_int 0)] VUNSPEC_GET_FPSCR))]
+ "TARGET_VFP"
+ "mrc\\tp10, 7, %0, cr1, cr0, 0\\t @GET_FPSCR"
+ [(set_attr "type" "mrs")])
+
+
;; Unimplemented insns:
;; fldm*
;; fstm*
@@ -9114,6 +9114,7 @@ instructions, but allow the compiler to schedule those calls.
* ARM iWMMXt Built-in Functions::
* ARM NEON Intrinsics::
* ARM ACLE Intrinsics::
+* ARM Floating Point Status and Control Intrinsics::
* AVR Built-in Functions::
* Blackfin Built-in Functions::
* FR-V Built-in Functions::
@@ -9918,6 +9919,17 @@ the @option{-march=armv8-a+crc} switch is used:
@include arm-acle-intrinsics.texi
+@node ARM Floating Point Status and Control Intrinsics
+@subsection ARM Floating Point Status and Control Intrinsics
+
+These built-in functions are available for the ARM family of
+processors with floating-point unit.
+
+@smallexample
+unsigned int __builtin_arm_get_fpscr ()
+void __builtin_arm_set_fpscr (unsigned int)
+@end smallexample
+
@node AVR Built-in Functions
@subsection AVR Built-in Functions