Patch to mips.h to silence sign compare warnings on Irix6

[Kaveh R. Ghazi]

Now that the sign compare warnings are slightly smarter about how they
treat conditional expressions with result braches that are constants,
e.g. (foo ? 64 : 32), we should remove the casts added in some of the
macro definitions in mips.h.  These casts unnecessarily force the
macros to be treated as unsigned int when they do not need to be
and cause extra warnings of their own.

As a result of doing this, we eliminate 52 sign compare warnings on an
Irix6 bootstrap with no testsuite regressions.

Okay to install?

		--Kaveh


2000-04-18  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>

	* mips.h (BITS_PER_WORD, UNITS_PER_WORD, UNITS_PER_FPREG,
	INT_TYPE_SIZE, LONG_TYPE_SIZE, POINTER_SIZE, POINTER_BOUNDARY,
	PARM_BOUNDARY): Remove unnecessary casts.

--- /var/tmp/gcc-testing/cvs-egcs/egcs/gcc/config/mips/mips.h	Mon Apr 17 10:31:09 2000
+++ mips.h	Tue Apr 18 14:41:00 2000
@@ -1295,20 +1295,20 @@ do {							\
    Note that this is not necessarily the width of data type `int';
    if using 16-bit ints on a 68000, this would still be 32.
    But on a machine with 16-bit registers, this would be 16.  */
-#define BITS_PER_WORD ((unsigned int) (TARGET_64BIT ? 64 : 32))
+#define BITS_PER_WORD (TARGET_64BIT ? 64 : 32)
 #define MAX_BITS_PER_WORD 64
 
 /* Width of a word, in units (bytes).  */
-#define UNITS_PER_WORD ((unsigned int) (TARGET_64BIT ? 8 : 4))
+#define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
 #define MIN_UNITS_PER_WORD 4
 
 /* For MIPS, width of a floating point register.  */
-#define UNITS_PER_FPREG ((unsigned int) (TARGET_FLOAT64 ? 8 : 4))
+#define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
 
 /* A C expression for the size in bits of the type `int' on the
    target machine.  If you don't define this, the default is one
    word.  */
-#define INT_TYPE_SIZE ((unsigned int) (TARGET_INT64 ? 64 : 32))
+#define INT_TYPE_SIZE (TARGET_INT64 ? 64 : 32)
 #define MAX_INT_TYPE_SIZE 64
 
 /* Tell the preprocessor the maximum size of wchar_t.  */
@@ -1327,7 +1327,7 @@ do {							\
 /* A C expression for the size in bits of the type `long' on the
    target machine.  If you don't define this, the default is one
    word.  */
-#define LONG_TYPE_SIZE ((unsigned int) (TARGET_LONG64 ? 64 : 32))
+#define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
 #define MAX_LONG_TYPE_SIZE 64
 
 /* A C expression for the size in bits of the type `long long' on the
@@ -1359,14 +1359,14 @@ do {							\
 /* Width in bits of a pointer.
    See also the macro `Pmode' defined below.  */
 #ifndef POINTER_SIZE
-#define POINTER_SIZE ((unsigned int) (Pmode == DImode ? 64 : 32))
+#define POINTER_SIZE (Pmode == DImode ? 64 : 32)
 #endif
 
 /* Allocation boundary (in *bits*) for storing pointers in memory.  */
-#define POINTER_BOUNDARY ((unsigned int) (Pmode == DImode ? 64 : 32))
+#define POINTER_BOUNDARY (Pmode == DImode ? 64 : 32)
 
 /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
-#define PARM_BOUNDARY ((unsigned int) (TARGET_64BIT ? 64 : 32))
+#define PARM_BOUNDARY (TARGET_64BIT ? 64 : 32)
 
 /* Allocation boundary (in *bits*) for the code of a function.  */
 #define FUNCTION_BOUNDARY 32