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[PATCH v3 04/14] sim/erc32: use SIM_AC_OPTION_HOSTENDIAN to probe for host endianess


	* Makefile.in (end, end.h) Remove target rules.
	* end.c Remove unnecessary local checks (end.c)
	* configure, config.in : Regenerate.
	* configure.ac : Use SIM_AC_OPTION_HOSTENDIAN
	* erc32.c : Remove dependecy on end.h
	* exec.c : Remove dependecy on end.h. Use HOST_LITTLE_ENDIAN.
	* func.c : As above.
	* sis.c : As above.
---
 sim/erc32/Makefile.in  |  18 +---
 sim/erc32/config.in    |  15 +++
 sim/erc32/configure    | 260 ++++++++++++++++++++++++++++++++++++++++++++++++-
 sim/erc32/configure.ac |   1 +
 sim/erc32/end.c        |  27 -----
 sim/erc32/erc32.c      |   1 -
 sim/erc32/exec.c       |   7 +-
 sim/erc32/func.c       |   3 +-
 sim/erc32/sis.h        |  11 ++-
 9 files changed, 285 insertions(+), 58 deletions(-)
 delete mode 100644 sim/erc32/end.c

diff --git a/sim/erc32/Makefile.in b/sim/erc32/Makefile.in
index a60cd8a..4f86017 100644
--- a/sim/erc32/Makefile.in
+++ b/sim/erc32/Makefile.in
@@ -41,21 +41,13 @@ sis: sis.o $(SIS_OFILES) $(COMMON_OBJS) $(LIBDEPS)
 	$(CC) $(ALL_CFLAGS) -o sis \
 	  sis.o $(SIS_OFILES) $(COMMON_OBJS) $(EXTRA_LIBS)
 
-# FIXME: This computes the build host's endianness, doesn't it?
-# There is AC_C_BIGENDIAN but it doesn't handle float endianness.
-# [Are int/float endians every different on a sparc?]
-end: $(srcdir)/end.c
-	$(CC_FOR_BUILD) -I. $(srcdir)/end.c -o end
-end.h: end
-	./end > end.h
-
 # Copy the files into directories where they will be run.
 install-sis: installdirs
 	n=`echo sis | sed '$(program_transform_name)'`; \
 	$(INSTALL_PROGRAM) sis$(EXEEXT) $(DESTDIR)$(bindir)/$$n$(EXEEXT)
 
 clean-sis:
-	rm -f sis end end.h
+	rm -f sis
 
 configure:
 	@echo "Rebuilding configure..."
@@ -64,11 +56,3 @@ configure:
 	else true ; fi ; \
 	(cd $${srcdir}; autoconf --localdir=../common)
 
-# Circumvent Sun Make bug with VPATH.
-erc32.o: erc32.c sis.h end.h
-exec.o: exec.c sis.h end.h
-float.o: float.c sis.h end.h
-func.o: func.c sis.h end.h
-help.o: help.c sis.h end.h
-interf.o: interf.c sis.h end.h 
-sis.o: sis.c sis.h end.h
diff --git a/sim/erc32/config.in b/sim/erc32/config.in
index 5fed8c1..b367e14 100644
--- a/sim/erc32/config.in
+++ b/sim/erc32/config.in
@@ -1,5 +1,8 @@
 /* config.in.  Generated from configure.ac by autoheader.  */
 
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
 /* Define to 1 if translation of program messages to the user's native
    language is requested. */
 #undef ENABLE_NLS
@@ -135,6 +138,18 @@
 #endif
 
 
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
 /* Define to 1 if on MINIX. */
 #undef _MINIX
 
diff --git a/sim/erc32/configure b/sim/erc32/configure
index ba43717..cbdcea5 100755
--- a/sim/erc32/configure
+++ b/sim/erc32/configure
@@ -761,6 +761,7 @@ enable_sim_trace
 enable_sim_profile
 with_pkgversion
 with_bugurl
+enable_sim_hostendian
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1403,6 +1404,7 @@ Optional Features:
   --enable-sim-stdio			Specify whether to use stdio for console input/output.
   --enable-sim-trace=opts		Enable tracing flags
   --enable-sim-profile=opts		Enable profiling flags
+  --enable-sim-hostendian=end		Specify host byte endian orientation.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -8121,7 +8123,7 @@ $as_echo "$lt_cv_ld_force_load" >&6; }
       case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
 	10.0,*86*-darwin8*|10.0,*-darwin[91]*)
 	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
-	10.[012]*)
+	10.[012][,.]*)
 	  _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
 	10.*)
 	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
@@ -10144,7 +10146,7 @@ _LT_EOF
       if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \
 	 && test "$tmp_diet" = no
       then
-	tmp_addflag=
+	tmp_addflag=' $pic_flag'
 	tmp_sharedflag='-shared'
 	case $cc_basename,$host_cpu in
         pgcc*)				# Portland Group C compiler
@@ -12354,7 +12356,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12357 "configure"
+#line 12359 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12460,7 +12462,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12463 "configure"
+#line 12465 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13111,6 +13113,255 @@ fi
 fi
 
 
+# Check whether --enable-sim-hostendian was given.
+if test "${enable_sim_hostendian+set}" = set; then :
+  enableval=$enable_sim_hostendian; case "${enableval}" in
+  no)	 sim_hostendian="-DWITH_HOST_BYTE_ORDER=0";;
+  b*|B*) sim_hostendian="-DWITH_HOST_BYTE_ORDER=BIG_ENDIAN";;
+  l*|L*) sim_hostendian="-DWITH_HOST_BYTE_ORDER=LITTLE_ENDIAN";;
+  *)	 as_fn_error "\"Unknown value $enableval for --enable-sim-hostendian\"" "$LINENO" 5; sim_hostendian="";;
+esac
+if test x"$silent" != x"yes" && test x"$sim_hostendian" != x""; then
+  echo "Setting hostendian flags = $sim_hostendian" 6>&1
+fi
+else
+
+if test "x$cross_compiling" = "xno"; then
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
+$as_echo_n "checking whether byte ordering is bigendian... " >&6; }
+if test "${ac_cv_c_bigendian+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_c_bigendian=unknown
+    # See if we're dealing with a universal compiler.
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __APPLE_CC__
+	       not a universal capable compiler
+	     #endif
+	     typedef int dummy;
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+	# Check for potential -arch flags.  It is not universal unless
+	# there are at least two -arch flags with different values.
+	ac_arch=
+	ac_prev=
+	for ac_word in $CC $CFLAGS $CPPFLAGS $LDFLAGS; do
+	 if test -n "$ac_prev"; then
+	   case $ac_word in
+	     i?86 | x86_64 | ppc | ppc64)
+	       if test -z "$ac_arch" || test "$ac_arch" = "$ac_word"; then
+		 ac_arch=$ac_word
+	       else
+		 ac_cv_c_bigendian=universal
+		 break
+	       fi
+	       ;;
+	   esac
+	   ac_prev=
+	 elif test "x$ac_word" = "x-arch"; then
+	   ac_prev=arch
+	 fi
+       done
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if sys/param.h defines the BYTE_ORDER macro.
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+	     #include <sys/param.h>
+
+int
+main ()
+{
+#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
+		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
+		     && LITTLE_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  # It does; now see whether it defined to BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+		#include <sys/param.h>
+
+int
+main ()
+{
+#if BYTE_ORDER != BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_bigendian=yes
+else
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # See if <limits.h> defines _LITTLE_ENDIAN or _BIG_ENDIAN (e.g., Solaris).
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main ()
+{
+#if ! (defined _LITTLE_ENDIAN || defined _BIG_ENDIAN)
+	      bogus endian macros
+	     #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  # It does; now see whether it defined to _BIG_ENDIAN or not.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+
+int
+main ()
+{
+#ifndef _BIG_ENDIAN
+		 not big endian
+		#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_bigendian=yes
+else
+  ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+    fi
+    if test $ac_cv_c_bigendian = unknown; then
+      # Compile a test program.
+      if test "$cross_compiling" = yes; then :
+  # Try to guess by grepping values from an object file.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+short int ascii_mm[] =
+		  { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+		short int ascii_ii[] =
+		  { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+		int use_ascii (int i) {
+		  return ascii_mm[i] + ascii_ii[i];
+		}
+		short int ebcdic_ii[] =
+		  { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+		short int ebcdic_mm[] =
+		  { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+		int use_ebcdic (int i) {
+		  return ebcdic_mm[i] + ebcdic_ii[i];
+		}
+		extern int foo;
+
+int
+main ()
+{
+return use_ascii (foo) == use_ebcdic (foo);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+	      ac_cv_c_bigendian=yes
+	    fi
+	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	      if test "$ac_cv_c_bigendian" = unknown; then
+		ac_cv_c_bigendian=no
+	      else
+		# finding both strings is unlikely to happen, but who knows?
+		ac_cv_c_bigendian=unknown
+	      fi
+	    fi
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main ()
+{
+
+	     /* Are we little or big endian?  From Harbison&Steele.  */
+	     union
+	     {
+	       long int l;
+	       char c[sizeof (long int)];
+	     } u;
+	     u.l = 1;
+	     return u.c[sizeof (long int) - 1] == 1;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ac_cv_c_bigendian=no
+else
+  ac_cv_c_bigendian=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+    fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_bigendian" >&5
+$as_echo "$ac_cv_c_bigendian" >&6; }
+ case $ac_cv_c_bigendian in #(
+   yes)
+     $as_echo "#define WORDS_BIGENDIAN 1" >>confdefs.h
+;; #(
+   no)
+      ;; #(
+   universal)
+
+$as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
+
+     ;; #(
+   *)
+     as_fn_error "unknown endianness
+ presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
+ esac
+
+  if test $ac_cv_c_bigendian = yes; then
+    sim_hostendian="-DWITH_HOST_BYTE_ORDER=BIG_ENDIAN"
+  else
+    sim_hostendian="-DWITH_HOST_BYTE_ORDER=LITTLE_ENDIAN"
+  fi
+else
+  sim_hostendian="-DWITH_HOST_BYTE_ORDER=0"
+fi
+fi
+
+
 ac_sources="$sim_link_files"
 ac_dests="$sim_link_links"
 while test -n "$ac_sources"; do
@@ -13245,6 +13496,7 @@ if test -z "${MAINTAINER_MODE_TRUE}" && test -z "${MAINTAINER_MODE_FALSE}"; then
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
 
+
 : ${CONFIG_STATUS=./config.status}
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
diff --git a/sim/erc32/configure.ac b/sim/erc32/configure.ac
index bc46091..854845c 100644
--- a/sim/erc32/configure.ac
+++ b/sim/erc32/configure.ac
@@ -32,4 +32,5 @@ else
 	       AC_ERROR([the required "readline" library is missing]), $TERMCAP)
 fi
 AC_SUBST(READLINE)
+SIM_AC_OPTION_HOSTENDIAN
 SIM_AC_OUTPUT
diff --git a/sim/erc32/end.c b/sim/erc32/end.c
deleted file mode 100644
index 9337198..0000000
--- a/sim/erc32/end.c
+++ /dev/null
@@ -1,27 +0,0 @@
-#include "config.h"
-#include <stdio.h>
-
-int
-main()
-{
-
-    unsigned int    u1;
-    char           *c;
-    double          d1;
-    float          *f1;
-
-    c = (char *) &u1;
-    u1 = 0x0F;
-    if (c[0] == 0x0F)
-	puts("#define HOST_LITTLE_ENDIAN\n");
-    else
-	puts("#define HOST_BIG_ENDIAN\n");
-
-    d1 = 1.0;
-    f1 = (float *) &d1;
-    if (*((int *) f1) != 0x3ff00000)
-	puts("#define HOST_LITTLE_ENDIAN_FLOAT\n");
-    else
-	puts("#define HOST_BIG_ENDIAN_FLOAT\n");
-    return 0;
-}
diff --git a/sim/erc32/erc32.c b/sim/erc32/erc32.c
index 18913dd..f33585c 100644
--- a/sim/erc32/erc32.c
+++ b/sim/erc32/erc32.c
@@ -30,7 +30,6 @@
 #include <sys/file.h>
 #include <unistd.h>
 #include "sis.h"
-#include "end.h"
 #include "sim-config.h"
 
 extern int      ctrl_c;
diff --git a/sim/erc32/exec.c b/sim/erc32/exec.c
index 68c77c6..e2935ed 100644
--- a/sim/erc32/exec.c
+++ b/sim/erc32/exec.c
@@ -21,7 +21,6 @@
 
 #include "config.h"
 #include "sis.h"
-#include "end.h"
 #include <math.h>
 #include <stdio.h>
 
@@ -1736,7 +1735,7 @@ fpexec(op3, rd, rs1, rs2, sregs)
        but what about machines where float values are different endianness
        from integer values? */
 
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
+#ifdef HOST_LITTLE_ENDIAN
     rs1 &= 0x1f;
     switch (opf) {
 	case FADDd:
@@ -1914,7 +1913,7 @@ fpexec(op3, rd, rs1, rs2, sregs)
 
     accex = get_accex();
 
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
+#ifdef HOST_LITTLE_ENDIAN
     switch (opf) {
     case FADDd:
     case FDIVd:
@@ -2061,7 +2060,7 @@ init_regs(sregs)
     sregs->err_mode = 0;
     ext_irl = 0;
     sregs->g[0] = 0;
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
+#ifdef HOST_LITTLE_ENDIAN
     sregs->fdp = (float32 *) sregs->fd;
     sregs->fsi = (int32 *) sregs->fs;
 #else
diff --git a/sim/erc32/func.c b/sim/erc32/func.c
index 9a41e0b..69d11fe 100644
--- a/sim/erc32/func.c
+++ b/sim/erc32/func.c
@@ -26,7 +26,6 @@
 #include <stdlib.h>
 #include <ctype.h>
 #include "sis.h"
-#include "end.h"
 #include <dis-asm.h>
 #include "sim-config.h"
 #include <inttypes.h>
@@ -737,7 +736,7 @@ disp_fpu(sregs)
 
     printf("\n fsr: %08X\n\n", sregs->fsr);
 
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
+#ifdef HOST_LITTLE_ENDIAN
     for (i = 0; i < 32; i++)
       sregs->fdp[i ^ 1] = sregs->fs[i];
 #endif
diff --git a/sim/erc32/sis.h b/sim/erc32/sis.h
index c4d50da..573e026 100644
--- a/sim/erc32/sis.h
+++ b/sim/erc32/sis.h
@@ -24,8 +24,13 @@
 #include "gdb/callback.h"
 #include "gdb/remote-sim.h"
 #include <stdint.h>
-
-#include "end.h"
+#include <sim-config.h>
+ 
+#if WITH_HOST_BYTE_ORDER == BIG_ENDIAN
+#define HOST_BIG_ENDIAN
+#else
+#define HOST_LITTLE_ENDIAN
+#endif
 
 #define I_ACC_EXC 1
 
@@ -58,7 +63,7 @@ typedef int64_t int64;	   /* 64-bit signed int */
 struct pstate {
 
     float64         fd[16];	/* FPU registers */
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
+#ifdef HOST_LITTLE_ENDIAN
     float32         fs[32];
     float32        *fdp;
 #else
-- 
1.9.1


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