Fix double_ptr_storage definition for gcc/x32

(Apply commit 9957645 from 'master' branch.)

* src/atomic_ops/sysdeps/standard_ao_double_t.h (double_ptr_storage):
Define as "unsigned long long" instead of __m128 for gcc/x32 (i.e.,
ILP32 on x86_64); update and reformat comment.

Conflicts:

    src/atomic_ops/sysdeps/standard_ao_double_t.h

diff --git a/src/atomic_ops/sysdeps/standard_ao_double_t.h b/src/atomic_ops/sysdeps/standard_ao_double_t.h
index 7089f05190ae5c66f825c3219d84ec1a07f97399..95803f21369dbbe1f943dbaa8206053cdd7b6012 100644 (file)
--- a/src/atomic_ops/sysdeps/standard_ao_double_t.h
+++ b/src/atomic_ops/sysdeps/standard_ao_double_t.h
@@ -1,12 +1,13 @@
 /*
  * NEC LE-IT: For 64-bit OS we extend the double type to hold two int64's
  *
- *  x86-64: __m128 serves as placeholder which also requires the compiler
- *          to align it on 16 byte boundary (as required by cmpxchg16).
+ * x86-64 (except for x32): __m128 serves as placeholder which also requires
+ *    the compiler to align it on 16 byte boundary (as required by cmpxchg16).
  * Similar things could be done for PowerPC 64-bit using a VMX data type...
  */
 
-#if (defined(__x86_64__) && __GNUC__ >= 4) || defined(_WIN64)
+#if ((defined(__x86_64__) && __GNUC__ >= 4) || defined(_WIN64)) \
+    && !defined(__ILP32__)
 # include <xmmintrin.h>
   typedef __m128 double_ptr_storage;
 #elif defined(_WIN32) && !defined(__GNUC__)
@@ -14,7 +15,6 @@
 #else
   typedef unsigned long long double_ptr_storage;
 #endif
-
 # define AO_HAVE_DOUBLE_PTR_STORAGE
 
 typedef union {