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Merge branch 'msp/double_middle_endian/OTP-10209' into maint

* msp/double_middle_endian/OTP-10209:
  Configure now assumed normal doubles
  Revise the autoconf tests for double middle endianness.
  Add test for floating-point output to float_SUITE.
  Unbreak floating point on middle-endian machines.
  • Loading branch information...
2 parents dd12380 + 85283dc commit 0342137176c653c51cc3a78781888cfca8568650 @garazdawi garazdawi committed Aug 24, 2012
View
106 aclocal.m4
@@ -59,6 +59,7 @@ AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only us
dnl Cross compilation variables
AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
@@ -606,6 +607,103 @@ ifelse([$5], , , [$5
fi
])
+dnl ----------------------------------------------------------------------
+dnl
+dnl AC_DOUBLE_MIDDLE_ENDIAN
+dnl
+dnl Checks whether doubles are represented in "middle-endian" format.
+dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
+dnl as well as DOUBLE_MIDDLE_ENDIAN.
+dnl
+dnl
+
+AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
+[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_SOURCE([[#include <stdlib.h>
+
+int
+main(void)
+{
+ int i = 0;
+ int zero = 0;
+ int bigendian;
+ int zero_index = 0;
+
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+
+ /* we'll use the one with 32-bit words */
+ union
+ {
+ double d;
+ unsigned int c[2];
+ } vint;
+
+ union
+ {
+ double d;
+ unsigned long c[2];
+ } vlong;
+
+ union
+ {
+ double d;
+ unsigned short c[2];
+ } vshort;
+
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ u.l = 1;
+ bigendian = (u.c[sizeof (long int) - 1] == 1);
+
+ zero_index = bigendian ? 1 : 0;
+
+ vint.d = 1.0;
+ vlong.d = 1.0;
+ vshort.d = 1.0;
+
+ if (sizeof(unsigned int) == 4)
+ {
+ if (vint.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned long) == 4)
+ {
+ if (vlong.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned short) == 4)
+ {
+ if (vshort.c[zero_index] != 0)
+ zero = 1;
+ }
+
+ exit (zero);
+}
+]])],
+ [ac_cv_c_double_middle_endian=no],
+ [ac_cv_c_double_middle_endian=yes],
+ [ac_cv_c_double_middle=unknown])])
+case $ac_cv_c_double_middle_endian in
+ yes)
+ m4_default([$1],
+ [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
+ [Define to 1 if your processor stores the words in a double in
+ middle-endian format (like some ARMs).])]) ;;
+ no)
+ $2 ;;
+ *)
+ m4_default([$3],
+ [AC_MSG_WARN([unknown double endianness
+presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
+esac
+])# AC_C_DOUBLE_MIDDLE_ENDIAN
+
dnl ----------------------------------------------------------------------
dnl
@@ -1337,6 +1435,14 @@ if test "$ac_cv_c_bigendian" = "yes"; then
AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
fi
+case X$erl_xcomp_double_middle_endian in
+ X) ;;
+ Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
+ *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
+esac
+
+AC_C_DOUBLE_MIDDLE_ENDIAN
+
AC_ARG_ENABLE(native-ethr-impls,
AS_HELP_STRING([--disable-native-ethr-impls],
[disable native ethread implementations]),
View
106 erts/aclocal.m4
@@ -59,6 +59,7 @@ AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only us
dnl Cross compilation variables
AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
@@ -606,6 +607,103 @@ ifelse([$5], , , [$5
fi
])
+dnl ----------------------------------------------------------------------
+dnl
+dnl AC_DOUBLE_MIDDLE_ENDIAN
+dnl
+dnl Checks whether doubles are represented in "middle-endian" format.
+dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
+dnl as well as DOUBLE_MIDDLE_ENDIAN.
+dnl
+dnl
+
+AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
+[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_SOURCE([[#include <stdlib.h>
+
+int
+main(void)
+{
+ int i = 0;
+ int zero = 0;
+ int bigendian;
+ int zero_index = 0;
+
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+
+ /* we'll use the one with 32-bit words */
+ union
+ {
+ double d;
+ unsigned int c[2];
+ } vint;
+
+ union
+ {
+ double d;
+ unsigned long c[2];
+ } vlong;
+
+ union
+ {
+ double d;
+ unsigned short c[2];
+ } vshort;
+
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ u.l = 1;
+ bigendian = (u.c[sizeof (long int) - 1] == 1);
+
+ zero_index = bigendian ? 1 : 0;
+
+ vint.d = 1.0;
+ vlong.d = 1.0;
+ vshort.d = 1.0;
+
+ if (sizeof(unsigned int) == 4)
+ {
+ if (vint.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned long) == 4)
+ {
+ if (vlong.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned short) == 4)
+ {
+ if (vshort.c[zero_index] != 0)
+ zero = 1;
+ }
+
+ exit (zero);
+}
+]])],
+ [ac_cv_c_double_middle_endian=no],
+ [ac_cv_c_double_middle_endian=yes],
+ [ac_cv_c_double_middle=unknown])])
+case $ac_cv_c_double_middle_endian in
+ yes)
+ m4_default([$1],
+ [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
+ [Define to 1 if your processor stores the words in a double in
+ middle-endian format (like some ARMs).])]) ;;
+ no)
+ $2 ;;
+ *)
+ m4_default([$3],
+ [AC_MSG_WARN([unknown double endianness
+presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
+esac
+])# AC_C_DOUBLE_MIDDLE_ENDIAN
+
dnl ----------------------------------------------------------------------
dnl
@@ -1337,6 +1435,14 @@ if test "$ac_cv_c_bigendian" = "yes"; then
AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
fi
+case X$erl_xcomp_double_middle_endian in
+ X) ;;
+ Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
+ *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
+esac
+
+AC_C_DOUBLE_MIDDLE_ENDIAN
+
AC_ARG_ENABLE(native-ethr-impls,
AS_HELP_STRING([--disable-native-ethr-impls],
[disable native ethread implementations]),
View
1 erts/configure.in
@@ -1730,6 +1730,7 @@ case X$erl_xcomp_bigendian in
esac
AC_C_BIGENDIAN
+AC_C_DOUBLE_MIDDLE_ENDIAN
dnl fdatasync syscall (Unix only)
AC_CHECK_FUNCS([fdatasync])
View
10 erts/emulator/beam/erl_bits.c
@@ -1005,8 +1005,13 @@ erts_new_bs_put_float(Process *c_p, Eterm arg, Uint num_bits, int flags)
if (is_float(arg)) {
FloatDef *fdp = (FloatDef*)(float_val(arg) + 1);
+#ifdef DOUBLE_MIDDLE_ENDIAN
+ a = fdp->fw[1];
+ b = fdp->fw[0];
+#else
a = fdp->fw[0];
b = fdp->fw[1];
+#endif
} else if (is_small(arg)) {
u.f64 = (double) signed_val(arg);
a = u.i32[0];
@@ -1015,8 +1020,13 @@ erts_new_bs_put_float(Process *c_p, Eterm arg, Uint num_bits, int flags)
if (big_to_double(arg, &u.f64) < 0) {
return 0;
}
+#ifdef DOUBLE_MIDDLE_ENDIAN
+ a = u.i32[1];
+ b = u.i32[0];
+#else
a = u.i32[0];
b = u.i32[1];
+#endif
} else {
return 0;
}
View
9 erts/emulator/test/float_SUITE.erl
@@ -25,7 +25,7 @@
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
fpe/1,fp_drv/1,fp_drv_thread/1,denormalized/1,match/1,
- bad_float_unpack/1,cmp_zero/1, cmp_integer/1, cmp_bignum/1]).
+ bad_float_unpack/1, write/1, cmp_zero/1, cmp_integer/1, cmp_bignum/1]).
-export([otp_7178/1]).
-export([hidden_inf/1]).
@@ -42,7 +42,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[fpe, fp_drv, fp_drv_thread, otp_7178, denormalized,
- match, bad_float_unpack, {group, comparison}
+ match, bad_float_unpack, write, {group, comparison}
,hidden_inf
].
@@ -190,6 +190,11 @@ bad_float_unpack(Config) when is_list(Config) ->
bad_float_unpack_match(<<F:64/float>>) -> F;
bad_float_unpack_match(<<I:64/integer-signed>>) -> I.
+%% Exposes endianness issues.
+
+write(Config) when is_list(Config) ->
+ "1.0" = io_lib:write(1.0).
+
cmp_zero(_Config) ->
cmp(0.5e-323,0).
View
106 lib/erl_interface/aclocal.m4
@@ -59,6 +59,7 @@ AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only us
dnl Cross compilation variables
AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
@@ -606,6 +607,103 @@ ifelse([$5], , , [$5
fi
])
+dnl ----------------------------------------------------------------------
+dnl
+dnl AC_DOUBLE_MIDDLE_ENDIAN
+dnl
+dnl Checks whether doubles are represented in "middle-endian" format.
+dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
+dnl as well as DOUBLE_MIDDLE_ENDIAN.
+dnl
+dnl
+
+AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
+[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_SOURCE([[#include <stdlib.h>
+
+int
+main(void)
+{
+ int i = 0;
+ int zero = 0;
+ int bigendian;
+ int zero_index = 0;
+
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+
+ /* we'll use the one with 32-bit words */
+ union
+ {
+ double d;
+ unsigned int c[2];
+ } vint;
+
+ union
+ {
+ double d;
+ unsigned long c[2];
+ } vlong;
+
+ union
+ {
+ double d;
+ unsigned short c[2];
+ } vshort;
+
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ u.l = 1;
+ bigendian = (u.c[sizeof (long int) - 1] == 1);
+
+ zero_index = bigendian ? 1 : 0;
+
+ vint.d = 1.0;
+ vlong.d = 1.0;
+ vshort.d = 1.0;
+
+ if (sizeof(unsigned int) == 4)
+ {
+ if (vint.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned long) == 4)
+ {
+ if (vlong.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned short) == 4)
+ {
+ if (vshort.c[zero_index] != 0)
+ zero = 1;
+ }
+
+ exit (zero);
+}
+]])],
+ [ac_cv_c_double_middle_endian=no],
+ [ac_cv_c_double_middle_endian=yes],
+ [ac_cv_c_double_middle=unknown])])
+case $ac_cv_c_double_middle_endian in
+ yes)
+ m4_default([$1],
+ [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
+ [Define to 1 if your processor stores the words in a double in
+ middle-endian format (like some ARMs).])]) ;;
+ no)
+ $2 ;;
+ *)
+ m4_default([$3],
+ [AC_MSG_WARN([unknown double endianness
+presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
+esac
+])# AC_C_DOUBLE_MIDDLE_ENDIAN
+
dnl ----------------------------------------------------------------------
dnl
@@ -1337,6 +1435,14 @@ if test "$ac_cv_c_bigendian" = "yes"; then
AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
fi
+case X$erl_xcomp_double_middle_endian in
+ X) ;;
+ Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
+ *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
+esac
+
+AC_C_DOUBLE_MIDDLE_ENDIAN
+
AC_ARG_ENABLE(native-ethr-impls,
AS_HELP_STRING([--disable-native-ethr-impls],
[disable native ethread implementations]),
View
106 lib/odbc/aclocal.m4
@@ -59,6 +59,7 @@ AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only us
dnl Cross compilation variables
AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
@@ -606,6 +607,103 @@ ifelse([$5], , , [$5
fi
])
+dnl ----------------------------------------------------------------------
+dnl
+dnl AC_DOUBLE_MIDDLE_ENDIAN
+dnl
+dnl Checks whether doubles are represented in "middle-endian" format.
+dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
+dnl as well as DOUBLE_MIDDLE_ENDIAN.
+dnl
+dnl
+
+AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
+[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_SOURCE([[#include <stdlib.h>
+
+int
+main(void)
+{
+ int i = 0;
+ int zero = 0;
+ int bigendian;
+ int zero_index = 0;
+
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+
+ /* we'll use the one with 32-bit words */
+ union
+ {
+ double d;
+ unsigned int c[2];
+ } vint;
+
+ union
+ {
+ double d;
+ unsigned long c[2];
+ } vlong;
+
+ union
+ {
+ double d;
+ unsigned short c[2];
+ } vshort;
+
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ u.l = 1;
+ bigendian = (u.c[sizeof (long int) - 1] == 1);
+
+ zero_index = bigendian ? 1 : 0;
+
+ vint.d = 1.0;
+ vlong.d = 1.0;
+ vshort.d = 1.0;
+
+ if (sizeof(unsigned int) == 4)
+ {
+ if (vint.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned long) == 4)
+ {
+ if (vlong.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned short) == 4)
+ {
+ if (vshort.c[zero_index] != 0)
+ zero = 1;
+ }
+
+ exit (zero);
+}
+]])],
+ [ac_cv_c_double_middle_endian=no],
+ [ac_cv_c_double_middle_endian=yes],
+ [ac_cv_c_double_middle=unknown])])
+case $ac_cv_c_double_middle_endian in
+ yes)
+ m4_default([$1],
+ [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
+ [Define to 1 if your processor stores the words in a double in
+ middle-endian format (like some ARMs).])]) ;;
+ no)
+ $2 ;;
+ *)
+ m4_default([$3],
+ [AC_MSG_WARN([unknown double endianness
+presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
+esac
+])# AC_C_DOUBLE_MIDDLE_ENDIAN
+
dnl ----------------------------------------------------------------------
dnl
@@ -1337,6 +1435,14 @@ if test "$ac_cv_c_bigendian" = "yes"; then
AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
fi
+case X$erl_xcomp_double_middle_endian in
+ X) ;;
+ Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
+ *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
+esac
+
+AC_C_DOUBLE_MIDDLE_ENDIAN
+
AC_ARG_ENABLE(native-ethr-impls,
AS_HELP_STRING([--disable-native-ethr-impls],
[disable native ethread implementations]),
View
106 lib/wx/aclocal.m4
@@ -59,6 +59,7 @@ AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only us
dnl Cross compilation variables
AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
@@ -606,6 +607,103 @@ ifelse([$5], , , [$5
fi
])
+dnl ----------------------------------------------------------------------
+dnl
+dnl AC_DOUBLE_MIDDLE_ENDIAN
+dnl
+dnl Checks whether doubles are represented in "middle-endian" format.
+dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly,
+dnl as well as DOUBLE_MIDDLE_ENDIAN.
+dnl
+dnl
+
+AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN],
+[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian,
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_SOURCE([[#include <stdlib.h>
+
+int
+main(void)
+{
+ int i = 0;
+ int zero = 0;
+ int bigendian;
+ int zero_index = 0;
+
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+
+ /* we'll use the one with 32-bit words */
+ union
+ {
+ double d;
+ unsigned int c[2];
+ } vint;
+
+ union
+ {
+ double d;
+ unsigned long c[2];
+ } vlong;
+
+ union
+ {
+ double d;
+ unsigned short c[2];
+ } vshort;
+
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ u.l = 1;
+ bigendian = (u.c[sizeof (long int) - 1] == 1);
+
+ zero_index = bigendian ? 1 : 0;
+
+ vint.d = 1.0;
+ vlong.d = 1.0;
+ vshort.d = 1.0;
+
+ if (sizeof(unsigned int) == 4)
+ {
+ if (vint.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned long) == 4)
+ {
+ if (vlong.c[zero_index] != 0)
+ zero = 1;
+ }
+ else if (sizeof(unsigned short) == 4)
+ {
+ if (vshort.c[zero_index] != 0)
+ zero = 1;
+ }
+
+ exit (zero);
+}
+]])],
+ [ac_cv_c_double_middle_endian=no],
+ [ac_cv_c_double_middle_endian=yes],
+ [ac_cv_c_double_middle=unknown])])
+case $ac_cv_c_double_middle_endian in
+ yes)
+ m4_default([$1],
+ [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1,
+ [Define to 1 if your processor stores the words in a double in
+ middle-endian format (like some ARMs).])]) ;;
+ no)
+ $2 ;;
+ *)
+ m4_default([$3],
+ [AC_MSG_WARN([unknown double endianness
+presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;;
+esac
+])# AC_C_DOUBLE_MIDDLE_ENDIAN
+
dnl ----------------------------------------------------------------------
dnl
@@ -1337,6 +1435,14 @@ if test "$ac_cv_c_bigendian" = "yes"; then
AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
fi
+case X$erl_xcomp_double_middle_endian in
+ X) ;;
+ Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;;
+ *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);;
+esac
+
+AC_C_DOUBLE_MIDDLE_ENDIAN
+
AC_ARG_ENABLE(native-ethr-impls,
AS_HELP_STRING([--disable-native-ethr-impls],
[disable native ethread implementations]),
View
4 xcomp/README.md
@@ -462,6 +462,10 @@ When a variable has been set, no warning will be issued.
`configure` will fail unless this variable is set. Since no default
value is used, `configure` will try to figure this out automatically.
+* `erl_xcomp_double_middle` - `yes|no`. Defaults to `no`.
+ If `yes`, the target system must have doubles in "middle-endian" format. If
+ `no`, it has "regular" endianness.
+
* `erl_xcomp_clock_gettime_cpu_time` - `yes|no`. Defaults to `no`. If `yes`,
the target system must have a working `clock_gettime()` implementation
that can be used for retrieving process CPU time.
View
9 xcomp/erl-xcomp-TileraMDE2.0-tilepro.conf
@@ -187,6 +187,15 @@ erl_xcomp_sysroot="$TILERA_ROOT/tile"
# value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=
+# * `erl_xcomp_double_middle_endian` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.
View
9 xcomp/erl-xcomp-avr32-atmel-linux-gnu.conf
@@ -190,6 +190,15 @@ erl_xcomp_sysroot="$ATMEL_SYSROOT_AVR32"
# value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=
+# * `erl_xcomp_double_middle_endian` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.
View
9 xcomp/erl-xcomp-mips-linux.conf
@@ -187,6 +187,15 @@ CFLAGS=-Os
# value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=
+# * `erl_xcomp_double_middle_endian` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.
View
2 xcomp/erl-xcomp-vars.sh
@@ -26,4 +26,4 @@
# and precious variables in $ERL_TOP/erts/aclocal.m4.
#
-erl_xcomp_vars="erl_xcomp_sysroot erl_xcomp_isysroot erl_xcomp_bigendian erl_xcomp_linux_clock_gettime_correction erl_xcomp_linux_nptl erl_xcomp_linux_usable_sigusrx erl_xcomp_linux_usable_sigaltstack erl_xcomp_poll erl_xcomp_kqueue erl_xcomp_putenv_copy erl_xcomp_reliable_fpe erl_xcomp_getaddrinfo erl_xcomp_gethrvtime_procfs_ioctl erl_xcomp_clock_gettime_cpu_time erl_xcomp_after_morecore_hook erl_xcomp_dlsym_brk_wrappers"
+erl_xcomp_vars="erl_xcomp_sysroot erl_xcomp_isysroot erl_xcomp_bigendian erl_xcomp_double_middle_endian erl_xcomp_linux_clock_gettime_correction erl_xcomp_linux_nptl erl_xcomp_linux_usable_sigusrx erl_xcomp_linux_usable_sigaltstack erl_xcomp_poll erl_xcomp_kqueue erl_xcomp_putenv_copy erl_xcomp_reliable_fpe erl_xcomp_getaddrinfo erl_xcomp_gethrvtime_procfs_ioctl erl_xcomp_clock_gettime_cpu_time erl_xcomp_after_morecore_hook erl_xcomp_dlsym_brk_wrappers"
View
9 xcomp/erl-xcomp-vxworks_ppc32.conf
@@ -187,6 +187,15 @@ AR="$WIND_BASE/gnu/3.4.4-vxworks-6.3/$WIND_HOST_TYPE/bin/arppc"
# value is used, `configure' will try to figure this out automatically.
erl_xcomp_bigendian=yes
+# * `erl_xcomp_double_middle_endian` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.
View
9 xcomp/erl-xcomp-x86_64-saf-linux-gnu.conf
@@ -187,6 +187,15 @@ erl_xcomp_after_morecore_hook=yes
# value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=
+# * `erl_xcomp_double_middle_endian` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.
View
9 xcomp/erl-xcomp.conf.template
@@ -187,6 +187,15 @@
# value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=
+# * `erl_xcomp_double_middle` - `yes|no`. No default. If `yes`, the
+# target system must have doubles in "middle-endian" format. If
+# `no`, it has "regular" endianness. This can often be automatically
+# detected, but not always. If not automatically detected,
+# `configure` will fail unless this variable is set. Since no
+# default value is used, `configure` will try to figure this out
+# automatically.
+#erl_xcomp_double_middle_endian
+
# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
# the target system must have a working `clock_gettime()' implementation
# that can be used for retrieving process CPU time.

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