From 687e57d7ac741d1c48ac030f87041aa56b888532 Mon Sep 17 00:00:00 2001
From: Michael Meissner <meissner@linux.ibm.com>
Date: Wed, 16 Feb 2022 22:00:00 -0500
Subject: [PATCH] Define __SIZEOF_FLOAT128__ and __SIZEOF_IBM128__.

Define the sizes of the PowerPC specific types __float128 and __ibm128 if those
types are enabled.

This patch will define __SIZEOF_IBM128__ and __SIZEOF_FLOAT128__ if their
respective types are created in the compiler.  Currently, this means both of
these will be defined if float128 support is enabled.  But at some point in
the future, __ibm128 could be enabled without enabling float128 support and
__SIZEOF_IBM128__ would be defined.

2022-02-16  Michael Meissner  <meissner@the-meissners.org>

gcc/
	PR target/99708
	* config/rs6000/rs6000-c.cc (rs6000_cpu_cpp_builtins): Define
	__SIZEOF_IBM128__ if the IBM 128-bit long double type is created.
	Define __SIZEOF_FLOAT128__ if the IEEE 128-bit floating point type
	is created.

gcc/testsuite/
	PR target/99708
	* gcc.target/powerpc/pr99708.c: New test.
---
 gcc/config/rs6000/rs6000-c.cc              |  6 +++++-
 gcc/testsuite/gcc.target/powerpc/pr99708.c | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/powerpc/pr99708.c

diff --git a/gcc/config/rs6000/rs6000-c.cc b/gcc/config/rs6000/rs6000-c.cc
index 15251efc209..d2e480ad7df 100644
--- a/gcc/config/rs6000/rs6000-c.cc
+++ b/gcc/config/rs6000/rs6000-c.cc
@@ -623,7 +623,11 @@ rs6000_cpu_cpp_builtins (cpp_reader *pfile)
   if (TARGET_FRSQRTES)
     builtin_define ("__RSQRTEF__");
   if (TARGET_FLOAT128_TYPE)
-    builtin_define ("__FLOAT128_TYPE__");
+      builtin_define ("__FLOAT128_TYPE__");
+  if (ibm128_float_type_node)
+    builtin_define ("__SIZEOF_IBM128__=16");
+  if (ieee128_float_type_node)
+    builtin_define ("__SIZEOF_FLOAT128__=16");
 #ifdef TARGET_LIBC_PROVIDES_HWCAP_IN_TCB
   builtin_define ("__BUILTIN_CPU_SUPPORTS__");
 #endif
diff --git a/gcc/testsuite/gcc.target/powerpc/pr99708.c b/gcc/testsuite/gcc.target/powerpc/pr99708.c
new file mode 100644
index 00000000000..d478f7bc4c0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr99708.c
@@ -0,0 +1,21 @@
+/* { dg-do run } */
+/* { require-effective-target ppc_float128_sw } */
+/* { dg-options "-O2 -mvsx -mfloat128" } */
+
+/*
+ * PR target/99708
+ *
+ * Verify that __SIZEOF_FLOAT128__ and __SIZEOF_IBM128__ are properly defined.
+ */
+
+#include <stdlib.h>
+
+int main (void)
+{
+  if (__SIZEOF_FLOAT128__ != sizeof (__float128)
+      || __SIZEOF_IBM128__ != sizeof (__ibm128))
+    abort ();
+
+  return 0;
+}
+