invoke.texi: Add -mlong32 documentation.

	* invoke.texi: Add -mlong32 documentation.
	* config/mips/mips.h (mips_explicit_type_size_string): New.
	(TARGET_SWITCHES): Add 'long32'.
	(TARGET_OPTIONS): Add 'explicit-type-size'.
	(CC1_SPECS): Set -mexplicit-type-size.
        (LONG_MAX_SPEC): Change a use of 'no-long64' to 'long32'.
	* config/mips/abi64.h (LONG_MAX_SPEC): Same.  Add 'mabi=32'.
	* config/mips/mips.c (mips_explicit_type_size_string): New.
	(override_options): Use it.
	* config/mips/osfrose.h (CC1_SPECS): Set -mexplicit-type-size.
	* config/mips/mips.h (SUBTARGET_CPP_SIZE_SPEC):
	Pointer size now depends on both size longs and size of GP
	registers.

From-SVN: r25799

gcc/ChangeLog

+Tue Mar 16 10:53:17 1999  Gavin Romig-Koch  <gavin@cygnus.com>
+
+	* invoke.texi: Add -mlong32 documentation.
+	* config/mips/mips.h (mips_explicit_type_size_string): New.
+	(TARGET_SWITCHES): Add 'long32'.
+	(TARGET_OPTIONS): Add 'explicit-type-size'.
+	(CC1_SPECS): Set -mexplicit-type-size.
+        (LONG_MAX_SPEC): Change a use of 'no-long64' to 'long32'.
+	* config/mips/abi64.h (LONG_MAX_SPEC): Same.  Add 'mabi=32'.
+	* config/mips/mips.c (mips_explicit_type_size_string): New.
+	(override_options): Use it.
+	* config/mips/osfrose.h (CC1_SPECS): Set -mexplicit-type-size.
+
+	* config/mips/mips.h (SUBTARGET_CPP_SIZE_SPEC): 
+	Pointer size now depends on both size longs and size of GP
+	registers.
+
 Tue Mar 16 10:22:22 1999  Gavin Romig-Koch  <gavin@cygnus.com>
 
 	* config/mips/iris.h (CTORS_SECTION_ASM_OP,DTORS_SECTION_ASM_OP,

gcc/config/mips/abi64.h

@@ -223,7 +223,7 @@ extern struct rtx_def *mips_function_value ();
 #undef LONG_MAX_SPEC
 #if ((MIPS_ABI_DEFAULT == ABI_64) || ((MIPS_ABI_DEFAULT == ABI_EABI) && ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_64BIT)))
 #define LONG_MAX_SPEC \
-  "%{!mabi=n32:%{!mno-long64:%{!mgp32:%{!mips1:%{!mips2:-D__LONG_MAX__=9223372036854775807L}}}}}"
+  "%{!mabi=32:%{!mabi=n32:%{!mlong32:%{!mgp32:%{!mips1:%{!mips2:-D__LONG_MAX__=9223372036854775807L}}}}}}"
 #else
 #define LONG_MAX_SPEC \
   "%{mabi=64:-D__LONG_MAX__=9223372036854775807L} \

gcc/config/mips/mips.c

@@ -221,6 +221,11 @@ int mips16;
    just a way to avoid using up another bit in target_flags.  */
 const char *mips_no_mips16_string;
 
+/* This is only used to determine if an type size setting option was 
+   explicitly specified (-mlong64, -mint64, -mlong32).  The specs
+   set this option if such an option is used. */
+char *mips_explicit_type_size_string;
+
 /* Whether we are generating mips16 hard float code.  In mips16 mode
    we always set TARGET_SOFT_FLOAT; this variable is nonzero if
    -msoft-float was not specified by the user, which means that we
@@ -4122,10 +4127,12 @@ override_options ()
   if (mips_abi == ABI_32)
     target_flags &= ~ (MASK_FLOAT64|MASK_64BIT);
 
-  /* In the EABI in 64 bit mode, longs and pointers are 64 bits.  Likewise
-   for the SGI Irix6 N64 ABI.  */
-  if ((mips_abi == ABI_EABI && TARGET_64BIT)
-      || mips_abi == ABI_64)
+  /* If no type size setting options (-mlong64,-mint64,-mlong32) were used
+     then set the type sizes.  In the EABI in 64 bit mode, longs and
+     pointers are 64 bits.  Likewise for the SGI Irix6 N64 ABI.  */
+  if (mips_explicit_type_size_string == NULL
+      && ((mips_abi == ABI_EABI && TARGET_64BIT)
+	  || mips_abi == ABI_64))
     target_flags |= MASK_LONG64;
 
   /* ??? This doesn't work yet, so don't let people try to use it.  */

gcc/config/mips/mips.h

@@ -146,6 +146,7 @@ extern const char *mips_isa_string;	/* for -mips{1,2,3,4} */
 extern const char *mips_abi_string;	/* for -mabi={32,n32,64} */
 extern const char *mips_entry_string;	/* for -mentry */
 extern const char *mips_no_mips16_string;/* for -mno-mips16 */
+extern const char *mips_explicit_type_size_string;/* for -mexplicit-type-size */
 extern int mips_split_addresses;	/* perform high/lo_sum support */
 extern int dslots_load_total;		/* total # load related delay slots */
 extern int dslots_load_filled;		/* # filled load delay slots */
@@ -453,6 +454,7 @@ extern void		mips_select_section ();
 {									\
   {"int64",		  MASK_INT64 | MASK_LONG64},			\
   {"long64",		  MASK_LONG64},					\
+  {"long32",		 -(MASK_LONG64 | MASK_INT64)},			\
   {"split-addresses",	  MASK_SPLIT_ADDR},				\
   {"no-split-addresses", -MASK_SPLIT_ADDR},				\
   {"mips-as",		 -MASK_GAS},					\
@@ -576,7 +578,8 @@ extern void		mips_select_section ();
   { "cpu=",	&mips_cpu_string	},				\
   { "ips",	&mips_isa_string	},				\
   { "entry",	&mips_entry_string	},				\
-  { "no-mips16", &mips_no_mips16_string	}                               \
+  { "no-mips16", &mips_no_mips16_string	},                              \
+  { "explicit-type-size", &mips_explicit_type_size_string }		\
 }
 
 /* This is meant to be redefined in the host dependent files.  */
@@ -888,6 +891,7 @@ while (0)
 %{mips4:%{!msingle-float:%{!m4650:-mfp64}} -mgp64} \
 %{mfp64:%{msingle-float:%emay not use both -mfp64 and -msingle-float}} \
 %{mfp64:%{m4650:%emay not use both -mfp64 and -m4650}} \
+%{mint64|mlong64|mlong32:-mexplicit-type-size }\
 %{m4650:-mcpu=r4650} \
 %{m3900:-mips1 -mcpu=r3900 -mfp32 -mgp32} \
 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
@@ -906,7 +910,7 @@ while (0)
 
 #ifndef SUBTARGET_CPP_SIZE_SPEC
 #define SUBTARGET_CPP_SIZE_SPEC "\
-%{mlong64:-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int} \
+%{mlong64:%{!mips1:%{!mips2:-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int}}} \
 %{!mlong64:-D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int}"
 #endif
 
@@ -920,7 +924,7 @@ while (0)
    correctly.  Similarly for 64bit ints and __INT_MAX__.  */
 #ifndef LONG_MAX_SPEC
 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_LONG64)
-#define LONG_MAX_SPEC "%{!mno-long64:-D__LONG_MAX__=9223372036854775807L}"
+#define LONG_MAX_SPEC "%{!mlong32:-D__LONG_MAX__=9223372036854775807L}"
 #else
 #define LONG_MAX_SPEC "%{mlong64:-D__LONG_MAX__=9223372036854775807L}"
 #endif

gcc/config/mips/osfrose.h

@@ -76,6 +76,7 @@ Boston, MA 02111-1307, USA.  */
 #define CC1_SPEC "\
 %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
 %{mips1:-mfp32 -mgp32} %{mips2:-mfp32 -mgp32} %{mips3:-mfp64 -mgp64} \
+%{mint64|mlong64|mlong32:-mexplicit-type-size }\
 %{G*} \
 %{pic-none:   -mno-half-pic} \
 %{pic-lib:    -mhalf-pic} \

gcc/invoke.texi

@@ -322,7 +322,7 @@ in the following sections.
 -mabicalls  -mcpu=@var{cpu type}  -membedded-data
 -membedded-pic  -mfp32  -mfp64  -mgas  -mgp32  -mgp64
 -mgpopt  -mhalf-pic  -mhard-float  -mint64  -mips1
--mips2  -mips3 -mips4 -mlong64  -mlong-calls  -mmemcpy
+-mips2  -mips3 -mips4 -mlong64  -mlong32 -mlong-calls  -mmemcpy
 -mmips-as  -mmips-tfile  -mno-abicalls
 -mno-embedded-data  -mno-embedded-pic
 -mno-gpopt  -mno-long-calls
@@ -4788,14 +4788,25 @@ Assume that 32 64-bit general purpose registers are available.  This is
 the default when the @samp{-mips3} option is used.
 
 @item -mint64
-Force int and long types to be 64 bits wide.  See @samp{-mlong64} for an
-explanation of the width of pointers.
+Force int and long types to be 64 bits wide.  See @samp{-mlong32} for an
+explanation of the default, and the width of pointers.
 
 @item -mlong64
-Force long types to be 64 bits wide.
+Force long types to be 64 bits wide.  See @samp{-mlong32} for an
+explanation of the default, and the width of pointers.
 
-The width of pointer types is the smaller of the width of longs
-or the width of general purpose registers.
+@item -mlong32
+Force long, int, and pointer types to be 32 bits wide.
+
+If none of @samp{-mlong32}, @samp{-mlong64}, or @samp{-mint64} are set,
+the size of ints, longs, and pointers depends on the ABI and ISA choosen.
+For @samp{-mabi=32}, and @samp{-mabi=n32}, ints and longs are 32 bits
+wide.  For @samp{-mabi=64}, ints are 32 bits, and longs are 64 bits wide.
+For @samp{-mabi=eabi} and either @samp{-mips1} or @samp{-mips2}, ints
+and longs are 32 bits wide.  For @samp{-mabi=eabi} and higher ISAs, ints
+are 32 bits, and longs are 64 bits wide.  The width of pointer types is
+the smaller of the width of longs or the width of general purpose
+registers (which in turn depends on the ISA).
 
 @itemx -mabi=32
 @itemx -mabi=n32