Add -mabi=n32 support.

[pf3gnuchains/gcc-fork.git] / gcc / config / mips / mips.h

diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 4a7f563..037836e 100644 (file)
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -74,6 +74,22 @@ enum processor_type {
 /* Recast the cpu class to be the cpu attribute.  */
 #define mips_cpu_attr ((enum attr_cpu)mips_cpu)
 
+/* Which ABI to use.  This is only used by the Irix 6 port currently.  */
+
+enum mips_abi_type {
+  ABI_32,
+  ABI_N32,
+  ABI_64
+};
+
+#ifndef MIPS_ABI_DEFAULT
+/* We define this away so that there is no extra runtime cost if the target
+   doesn't support multiple ABIs.  */
+#define mips_abi ABI_32
+#else
+extern enum mips_abi_type mips_abi;
+#endif
+
 /* Whether to emit abicalls code sequences or not.  */
 
 enum mips_abicalls_type {
@@ -119,6 +135,7 @@ extern enum mips_abicalls_type mips_abicalls;/* for svr4 abi pic calls */
 extern int mips_isa;                   /* architectural level */
 extern char *mips_cpu_string;          /* for -mcpu=<xxx> */
 extern char *mips_isa_string;          /* for -mips{1,2,3,4} */
+extern char *mips_abi_string;          /* for -misa={32,n32,64} */
 extern int dslots_load_total;          /* total # load related delay slots */
 extern int dslots_load_filled;         /* # filled load delay slots */
 extern int dslots_jump_total;          /* total # jump related delay slots */
@@ -450,10 +467,14 @@ extern char              *mktemp ();
 
 #define TARGET_OPTIONS                                                 \
 {                                                                      \
+  SUBTARGET_TARGET_OPTIONS                                             \
   { "cpu=",    &mips_cpu_string        },                              \
   { "ips",     &mips_isa_string        }                               \
 }
 
+/* This is meant to be redefined in the host dependent files.  */
+#define SUBTARGET_TARGET_OPTIONS
+
 /* Macros to decide whether certain features are available or not,
    depending on the instruction set architecture level.  */
 
@@ -530,7 +551,7 @@ do                                                                  \
   }                                                                    \
 while (0)
 
-/* This is meant to be redefined in the host dependent files */
+/* This is meant to be redefined in the host dependent files.  */
 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE
 
 /* Show we can debug even without a frame pointer.  */
@@ -1635,10 +1656,6 @@ extern enum reg_class    mips_secondary_reload_class ();
 \f
 /* Stack layout; function entry, exit and calling.  */
 
-/* Don't enable support for the 64 bit ABI calling convention.
-   Some embedded code depends on the old 64 bit calling convention.  */
-#define ABI_64BIT 0
-
 /* Define this if pushing a word on the stack
    makes the stack pointer a smaller address.  */
 #define STACK_GROWS_DOWNWARD
@@ -1790,7 +1807,7 @@ extern struct mips_frame_info current_frame_info;
            && ((TO) == FRAME_POINTER_REGNUM                             \
                || (TO) == STACK_POINTER_REGNUM))                        \
     (OFFSET) = (current_frame_info.total_size                           \
-               - (ABI_64BIT && mips_isa >= 3                            \
+               - (mips_abi != ABI_32                                    \
                   ? current_function_pretend_args_size                  \
                   : 0));                                                \
   else if ((FROM) == RETURN_ADDRESS_POINTER_REGNUM                      \
@@ -2371,7 +2388,7 @@ typedef struct mips_args {
           /* ??? Reject combining an address with a register for the MIPS  \
             64 bit ABI, because the SGI assembler can not handle this.  */ \
          if (!TARGET_DEBUG_A_MODE                                      \
-             && ! ABI_64BIT                                            \
+             && mips_abi == ABI_32                                     \
              && CONSTANT_ADDRESS_P (xplus1)                            \
              && (!TARGET_EMBEDDED_PIC                                  \
                  || code1 != CONST                                     \
@@ -2400,7 +2417,7 @@ typedef struct mips_args {
     || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH               \
     || (GET_CODE (X) == CONST                                          \
        && ! (flag_pic && pic_address_needs_scratch (X))                \
-       && ! ABI_64BIT))                                                \
+       && mips_abi == ABI_32))                                         \
    && (!HALF_PIC_P () || !HALF_PIC_ADDRESS_P (X)))
 
 /* Define this, so that when PIC, reload won't try to reload invalid
@@ -2419,7 +2436,7 @@ typedef struct mips_args {
 #define LEGITIMATE_CONSTANT_P(X)                                       \
   ((GET_CODE (X) != CONST_DOUBLE                                       \
     || mips_const_double_ok (X, GET_MODE (X)))                         \
-   && ! (GET_CODE (X) == CONST && ABI_64BIT))
+   && ! (GET_CODE (X) == CONST && mips_abi != ABI_32))
 
 /* A C compound statement that attempts to replace X with a valid
    memory address for an operand of mode MODE.  WIN will be a C
@@ -2473,7 +2490,7 @@ typedef struct mips_args {
   if (GET_CODE (xinsn) == CONST                                                \
       && ((flag_pic && pic_address_needs_scratch (xinsn))              \
          /* ??? SGI's Irix 6 assembler can't handle CONST.  */         \
-         || ABI_64BIT))                                                \
+         || mips_abi != ABI_32))                                       \
     {                                                                  \
       rtx ptr_reg = gen_reg_rtx (Pmode);                               \
       rtx constant = XEXP (XEXP (xinsn, 0), 1);                                \
@@ -3594,15 +3611,14 @@ do {                                                                    \
     fprintf (STREAM, "\t%s\t%sL%d-%sLS%d\n",                           \
             TARGET_LONG64 ? ".dword" : ".word",                        \
             LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL);       \
-  else if (! ABI_64BIT)                                                        \
+  else if (mips_abi == ABI_32)                                         \
     fprintf (STREAM, "\t%s\t%sL%d\n",                                  \
             TARGET_LONG64 ? ".gpdword" : ".gpword",                    \
             LOCAL_LABEL_PREFIX, VALUE);                                \
   else                                                                 \
-    /* ??? Why does this one use . and not LOCAL_LABEL_PREFIX?  */     \
-    fprintf (STREAM, "\t%s\t.L%d\n",                                   \
+    fprintf (STREAM, "\t%s\t%sL%d\n",                                  \
             TARGET_LONG64 ? ".dword" : ".word",                        \
-            VALUE);                                                    \
+            LOCAL_LABEL_PREFIX, VALUE);                                \
 } while (0)
 
 /* When generating embedded PIC code we want to put the jump table in