Complete rewrite.

From-SVN: r2762

gcc/config/i386/386bsd.h

 /* Configuration for an i386 running 386BSD as the target machine.  */
-#include "i386mach.h"
+
+/* This is tested by i386gas.h.  */
+#define YES_UNDERSCORES
+
+#include "i386gstabs.h"
 
 #undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dunix -Di386 -D____386BSD____"
+#define CPP_PREDEFINES "-Dunix -Di386 -D____386BSD____ -D__386BSD__ -DBSD_NET2"
+
+/* Like the default, except no -lg.  */
+#define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "short unsigned int"
+
+#define WCHAR_UNSIGNED 1
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 16
+
+/* 386BSD does have atexit.  */
+
+#define HAVE_ATEXIT
+
+/* Redefine this to use %eax instead of %edx.  */
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO)  \
+{									\
+  if (flag_pic)								\
+    {									\
+      fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n",		\
+	       LPREFIX, (LABELNO));					\
+      fprintf (FILE, "\tcall *_mcount@GOT(%%ebx)\n");			\
+    }									\
+  else									\
+    {									\
+      fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO));	\
+      fprintf (FILE, "\tcall _mcount\n");				\
+    }									\
+}
+
+/* There are conflicting reports about whether this system uses
+   a different assembler syntax.  */
+#if 0
+#undef COMMENT_BEGIN
+#define COMMENT_BEGIN "#"
+
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+#endif
+
+/* Defines to be able to build libgcc.a with GCC.
+   These are the same as in i386mach.h.  */
+
+/* It might seem that these are not important, since gcc 2 will never
+   call libgcc for these functions.  But programs might be linked with
+   code compiled by gcc 1, and then these will be used.  */
+
+#define perform_udivsi3(a,b)						\
+{									\
+  register int dx asm("dx");						\
+  register int ax asm("ax");						\
+									\
+  dx = 0;								\
+  ax = a;								\
+  asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b), "d" (dx));	\
+  return ax;								\
+}
+
+#define perform_divsi3(a,b)						\
+{									\
+  register int dx asm("dx");						\
+  register int ax asm("ax");						\
+									\
+  ax = a;								\
+  asm ("cltd\n\tidivl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b));	\
+  return ax;								\
+}
+
+#define perform_umodsi3(a,b)						\
+{									\
+  register int dx asm("dx");						\
+  register int ax asm("ax");						\
+									\
+  dx = 0;								\
+  ax = a;								\
+  asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b), "d" (dx));	\
+  return dx;								\
+}
+
+#define perform_modsi3(a,b)						\
+{									\
+  register int dx asm("dx");						\
+  register int ax asm("ax");						\
+									\
+  ax = a;								\
+  asm ("cltd\n\tidivl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b));	\
+  return dx;								\
+}
+
 
-/* Specify extra dir to search for include files.  */
-#undef SYSTEM_INCLUDE_DIR
+#define perform_fixdfsi(a)						\
+{									\
+  auto unsigned short ostatus;						\
+  auto unsigned short nstatus;						\
+  auto int ret;								\
+  auto double tmp;							\
+									\
+  &ostatus;			/* guarantee these land in memory */	\
+  &nstatus;								\
+  &ret;									\
+  &tmp;									\
+									\
+  asm volatile ("fnstcw %0" : "=m" (ostatus));				\
+  nstatus = ostatus | 0x0c00;						\
+  asm volatile ("fldcw %0" : /* no outputs */ : "m" (nstatus));		\
+  tmp = a;								\
+  asm volatile ("fldl %0" : /* no outputs */ : "m" (tmp));		\
+  asm volatile ("fistpl %0" : "=m" (ret));				\
+  asm volatile ("fldcw %0" : /* no outputs */ : "m" (ostatus));		\
+									\
+  return ret;								\
+}