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$NetBSD: patch-en,v 1.1 2009/06/19 11:25:15 he Exp $
For the benefit of 64-bit strict alignment archs using gcc, such
as NetBSD/sparc64, ensure that the specially crafted double values
are properly aligned.
--- extensions/transformiix/source/base/Double.cpp.orig 2006-06-22 21:13:00.000000000 +0200
+++ extensions/transformiix/source/base/Double.cpp
@@ -95,8 +95,12 @@ typedef union txdpun {
#define TX_DOUBLE_HI32(x) (__extension__ ({ txdpun u; u.d = (x); u.s.hi; }))
#define TX_DOUBLE_LO32(x) (__extension__ ({ txdpun u; u.d = (x); u.s.lo; }))
+#define __d_align __attribute__ ((aligned (__alignof__(double))))
+
#else // __GNUC__
+#define __d_align /* Empty */
+
/* We don't know of any non-gcc compilers that perform alias optimization,
* so this code should work.
*/
@@ -117,17 +121,19 @@ typedef union txdpun {
//-- Initialize Double related constants
#ifdef IS_BIG_ENDIAN
-const PRUint32 nanMask[2] = {TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_MANTMASK,
+const PRUint32 nanMask[2] __d_align = {TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_MANTMASK,
0xffffffff};
-const PRUint32 infMask[2] = {TX_DOUBLE_HI32_EXPMASK, 0};
-const PRUint32 negInfMask[2] = {TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_SIGNBIT, 0};
+const PRUint32 infMask[2] __d_align = {TX_DOUBLE_HI32_EXPMASK, 0};
+const PRUint32 negInfMask[2] __d_align = {TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_SIGNBIT, 0};
#else
-const PRUint32 nanMask[2] = {0xffffffff,
+const PRUint32 nanMask[2] __d_align = {0xffffffff,
TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_MANTMASK};
-const PRUint32 infMask[2] = {0, TX_DOUBLE_HI32_EXPMASK};
-const PRUint32 negInfMask[2] = {0, TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_SIGNBIT};
+const PRUint32 infMask[2] __d_align = {0, TX_DOUBLE_HI32_EXPMASK};
+const PRUint32 negInfMask[2] __d_align = {0, TX_DOUBLE_HI32_EXPMASK | TX_DOUBLE_HI32_SIGNBIT};
#endif
+#undef __d_align
+
const double Double::NaN = *((double*)nanMask);
const double Double::POSITIVE_INFINITY = *((double*)infMask);
const double Double::NEGATIVE_INFINITY = *((double*)negInfMask);
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