/* Forward declare some functions */
static void __objc_init_install_dtable(id, SEL);
+
+/* Various forwarding functions that are used based upon the
+ return type for the selector.
+ __objc_block_forward for structures.
+ __objc_double_forward for floats/doubles.
+ __objc_word_forward for pointers or types that fit in registers.
+ */
+static double __objc_double_forward(id, SEL, ...);
static id __objc_word_forward(id, SEL, ...);
typedef struct { id many[8]; } __big;
#if INVISIBLE_STRUCT_RETURN
const char *t = sel->sel_types;
if (t && (*t == '[' || *t == '(' || *t == '{'))
res = (IMP)__objc_block_forward;
+ else if (t && (*t == 'f' || *t == 'd'))
+ res = (IMP)__objc_double_forward;
else
res = (IMP)__objc_word_forward;
}
const char *t = op->sel_types;
if (t && (*t == '[' || *t == '(' || *t == '{'))
result = (IMP)__objc_block_forward;
+ else if (t && (*t == 'f' || *t == 'd'))
+ result = (IMP)__objc_double_forward;
else
result = (IMP)__objc_word_forward;
}
static retval_t __objc_forward (id object, SEL sel, arglist_t args);
+/* Forwarding pointers/integers through the normal registers */
static id
__objc_word_forward (id rcv, SEL op, ...)
{
return res;
}
+/* Specific routine for forwarding floats/double because of
+ architectural differences on some processors. i386s for
+ example which uses a floating point stack versus general
+ registers for floating point numbers. This forward routine
+ makes sure that GCC restores the proper return values. */
+static double
+__objc_double_forward (id rcv, SEL op, ...)
+{
+ void *args, *res;
+
+ args = __builtin_apply_args ();
+ res = __objc_forward (rcv, op, args);
+ __builtin_return (res);
+}
+
#if INVISIBLE_STRUCT_RETURN
static __big
#else