testsuite: Fix false FAIL in gdb.cp/casts.exp

[deliverable/binutils-gdb.git] / gdb / arch-utils.c

diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c
index 53121bcaf99806a2e2a44e022aa53ce5ad2c5e5e..776dabc79fcc6318e2856916e944f695b05b8b47 100644 (file)
--- a/gdb/arch-utils.c
+++ b/gdb/arch-utils.c
@@ -241,6 +241,34 @@ legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
   *frame_offset = 0;
 }
 
+/* Return a floating-point format for a floating-point variable of
+   length LEN in bits.  If non-NULL, NAME is the name of its type.
+   If no suitable type is found, return NULL.  */
+
+const struct floatformat **
+default_floatformat_for_type (struct gdbarch *gdbarch,
+                             const char *name, int len)
+{
+  const struct floatformat **format = NULL;
+
+  if (len == gdbarch_half_bit (gdbarch))
+    format = gdbarch_half_format (gdbarch);
+  else if (len == gdbarch_float_bit (gdbarch))
+    format = gdbarch_float_format (gdbarch);
+  else if (len == gdbarch_double_bit (gdbarch))
+    format = gdbarch_double_format (gdbarch);
+  else if (len == gdbarch_long_double_bit (gdbarch))
+    format = gdbarch_long_double_format (gdbarch);
+  /* On i386 the 'long double' type takes 96 bits,
+     while the real number of used bits is only 80,
+     both in processor and in memory.
+     The code below accepts the real bit size.  */
+  else if (gdbarch_long_double_format (gdbarch) != NULL
+          && len == gdbarch_long_double_format (gdbarch)[0]->totalsize)
+    format = gdbarch_long_double_format (gdbarch);
+
+  return format;
+}
 \f
 int
 generic_convert_register_p (struct gdbarch *gdbarch, int regnum,