[PATCH] [PR99708] [rs6000] don't expect __ibm128 with 64-bit long double

[Alexandre Oliva <oliva@adacore.com>]

When long double is 64-bit wide, as on vxworks, the rs6000 backend
defines neither the __ibm128 type nor the __SIZEOF_IBM128__ macro, but
pr99708.c expected both to be always defined.  Adjust the test to
match the implementation.

Regstrapped on ppc64-linux-gnu.  Also tested with ppc64-vxworks7r2
(gcc-12).  Ok to install?


for  gcc/testsuite/ChangeLog

	* gcc.target/powerpc/pr99708.c: Accept lack of
	__SIZEOF_IBM128__ when long double is 64-bit wide.
---
 gcc/testsuite/gcc.target/powerpc/pr99708.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/powerpc/pr99708.c b/gcc/testsuite/gcc.target/powerpc/pr99708.c
index 02b40ebc40d3d..fca6296d9c81f 100644
--- a/gcc/testsuite/gcc.target/powerpc/pr99708.c
+++ b/gcc/testsuite/gcc.target/powerpc/pr99708.c
@@ -14,7 +14,13 @@
 int main (void)
 {
   if (__SIZEOF_FLOAT128__ != sizeof (__float128)
-      || __SIZEOF_IBM128__ != sizeof (__ibm128))
+#ifdef __SIZEOF_IBM128__ /* Not defined, and no __ibm128 type on targets whose
+			    long double is 64-bit.  */
+      || __SIZEOF_IBM128__ != sizeof (__ibm128)
+#else
+      || __SIZEOF_LONG_DOUBLE__ * __CHAR_BIT__ != 64
+#endif
+      )
     abort ();
 
   return 0;

-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts.  Ask me about <https://stallmansupport.org>