Fix stdlib defines for AArch32

Some of the macro defines in the header files of `include/lib/stdlib/machine/`
folder are not correct for AArch32. This patch fixes the same.

Change-Id: I8bfaf638a7986fd902648d2074537bd26c313cb3
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

include/lib/stdlib/machine/_limits.h

@@ -27,6 +27,11 @@
  * $FreeBSD$
  */
 
+/*
+ * Portions copyright (c) 2017, ARM Limited and Contributors.
+ * All rights reserved.
+ */
+
 #ifndef	_MACHINE__LIMITS_H_
 #define	_MACHINE__LIMITS_H_
 
@@ -50,17 +55,21 @@
 #define	__SHRT_MAX	0x7fff		/* max value for a short */
 #define	__SHRT_MIN	(-0x7fff-1)	/* min value for a short */
 
-#define	__UINT_MAX	0xffffffff	/* max value for an unsigned int */
+#define	__UINT_MAX	0xffffffffU	/* max value for an unsigned int */
 #define	__INT_MAX	0x7fffffff	/* max value for an int */
 #define	__INT_MIN	(-0x7fffffff-1)	/* min value for an int */
 
-#define	__ULONG_MAX	0xffffffffffffffff	/* max for an unsigned long */
-#define	__LONG_MAX	0x7fffffffffffffff	/* max for a long */
-#define	__LONG_MIN	(-0x7fffffffffffffff-1) /* min for a long */
-
-/* Long longs have the same size but not the same type as longs. */
-					/* max for an unsigned long long */
-#define	__ULLONG_MAX	0xffffffffffffffffULL
+#ifdef AARCH32
+#define	__ULONG_MAX	0xffffffffUL	/* max for an unsigned long */
+#define	__LONG_MAX	0x7fffffffL	/* max for a long */
+#define	__LONG_MIN	(-0x7fffffffL-1) /* min for a long */
+#else
+#define	__ULONG_MAX	0xffffffffffffffffUL	/* max for an unsigned long */
+#define	__LONG_MAX	0x7fffffffffffffffL	/* max for a long */
+#define	__LONG_MIN	(-0x7fffffffffffffffL-1) /* min for a long */
+#endif
+
+#define	__ULLONG_MAX	0xffffffffffffffffULL	/* max for an unsigned long long */
 #define	__LLONG_MAX	0x7fffffffffffffffLL	/* max for a long long */
 #define	__LLONG_MIN	(-0x7fffffffffffffffLL-1) /* min for a long long */
 
@@ -71,12 +80,23 @@
 #define	__OFF_MAX	__LONG_MAX	/* max value for an off_t */
 #define	__OFF_MIN	__LONG_MIN	/* min value for an off_t */
 
+#ifdef AARCH32
+/* Quads and long longs are the same size.  Ensure they stay in sync. */
+#define	__UQUAD_MAX	(__ULLONG_MAX)	/* max value for a uquad_t */
+#define	__QUAD_MAX	(__LLONG_MAX)	/* max value for a quad_t */
+#define	__QUAD_MIN	(__LLONG_MIN)	/* min value for a quad_t */
+#else
 /* Quads and longs are the same size.  Ensure they stay in sync. */
 #define	__UQUAD_MAX	(__ULONG_MAX)	/* max value for a uquad_t */
 #define	__QUAD_MAX	(__LONG_MAX)	/* max value for a quad_t */
 #define	__QUAD_MIN	(__LONG_MIN)	/* min value for a quad_t */
+#endif
 
+#ifdef AARCH32
+#define	__LONG_BIT	32
+#else
 #define	__LONG_BIT	64
+#endif
 #define	__WORD_BIT	32
 
 /* Minimum signal stack size. */

include/lib/stdlib/machine/_stdint.h

@@ -31,7 +31,7 @@
  */
 
 /*
- * Portions copyright (c) 2016, ARM Limited and Contributors.
+ * Portions copyright (c) 2016-2017, ARM Limited and Contributors.
  * All rights reserved.
  */
 
@@ -127,9 +127,15 @@
  * ISO/IEC 9899:1999
  * 7.18.2.4  Limits of integer types capable of holding object pointers
  */
+#ifdef AARCH32
+#define	INTPTR_MIN	INT32_MIN
+#define	INTPTR_MAX	INT32_MAX
+#define	UINTPTR_MAX	UINT32_MAX
+#else
 #define	INTPTR_MIN	INT64_MIN
 #define	INTPTR_MAX	INT64_MAX
 #define	UINTPTR_MAX	UINT64_MAX
+#endif
 
 /*
  * ISO/IEC 9899:1999
@@ -144,15 +150,24 @@
  * 7.18.3  Limits of other integer types
  */
 /* Limits of ptrdiff_t. */
-#define	PTRDIFF_MIN	INT64_MIN	
+#ifdef AARCH32
+#define	PTRDIFF_MIN	INT32_MIN
+#define	PTRDIFF_MAX	INT32_MAX
+#else
+#define	PTRDIFF_MIN	INT64_MIN
 #define	PTRDIFF_MAX	INT64_MAX
+#endif
 
 /* Limits of sig_atomic_t. */
 #define	SIG_ATOMIC_MIN	INT32_MIN
 #define	SIG_ATOMIC_MAX	INT32_MAX
 
 /* Limit of size_t. */
+#ifdef AARCH32
+#define	SIZE_MAX	UINT32_MAX
+#else
 #define	SIZE_MAX	UINT64_MAX
+#endif
 
 #ifndef WCHAR_MIN /* Also possibly defined in <wchar.h> */
 /* Limits of wchar_t. */