+2013-07-21 Tobias Burnus <burnus@net-b.de>
+
+ PR fortran/35862
+ * libgfortran.h (GFC_FPE_DOWNWARD, GFC_FPE_TONEAREST,
+ GFC_FPE_TOWARDZERO, GFC_FPE_UPWARD): New defines.
+
2013-07-21 Tobias Burnus <burnus@net-b.de>
PR fortran/57894
#define GFC_FPE_UNDERFLOW (1<<4)
#define GFC_FPE_INEXACT (1<<5)
+/* Defines for floating-point rounding modes. */
+#define GFC_FPE_DOWNWARD 1
+#define GFC_FPE_TONEAREST 2
+#define GFC_FPE_TOWARDZERO 3
+#define GFC_FPE_UPWARD 4
+
/* Bitmasks for the various runtime checks that can be enabled. */
#define GFC_RTCHECK_BOUNDS (1<<0)
+2013-07-21 Tobias Burnus <burnus@net-b.de>
+
+ PR fortran/35862
+ * gfortran.dg/round_4.f90: New.
+
2013-07-21 Tobias Burnus <burnus@net-b.de>
PR fortran/57894
--- /dev/null
+! { dg-do run }
+! { dg-add-options ieee }
+!
+! PR fortran/35862
+!
+! Test whether I/O rounding works. Uses internally (libgfortran) strtod
+! for the conversion - and sets the CPU rounding mode accordingly.
+!
+! If it doesn't work on your system, please check whether strtod handles
+! rounding and whether your system is supported in libgfortran/config/fpu*.c
+!
+! Please only add ... run { target { ! { triplets } } } if it is unfixable
+! on your target - and a note why (strtod doesn't handle it, no rounding
+! support, etc.)
+!
+program main
+ use iso_fortran_env
+ implicit none
+
+ ! The following uses kinds=10 and 16 if available or
+ ! 8 and 10 - or 8 and 16 - or 4 and 8.
+ integer, parameter :: xp = real_kinds(ubound(real_kinds,dim=1)-1)
+ integer, parameter :: qp = real_kinds(ubound(real_kinds,dim=1))
+
+ real(4) :: r4p, r4m, ref4u, ref4d
+ real(8) :: r8p, r8m, ref8u, ref8d
+ real(xp) :: r10p, r10m, ref10u, ref10d
+ real(qp) :: r16p, r16m, ref16u, ref16d
+ character(len=20) :: str, round
+
+ ref4u = 0.100000001_4
+ ref8u = 0.10000000000000001_8
+
+ if (xp == 4) then
+ ref10u = 0.100000001_xp
+ elseif (xp == 8) then
+ ref10u = 0.10000000000000001_xp
+ else ! xp == 10
+ ref10u = 0.1000000000000000000014_xp
+ end if
+
+ if (qp == 8) then
+ ref16u = 0.10000000000000001_qp
+ elseif (qp == 10) then
+ ref16u = 0.1000000000000000000014_qp
+ else ! qp == 16
+ ref16u = 0.10000000000000000000000000000000000481_qp
+ end if
+
+ ! ref*d = 9.999999...
+ ref4d = nearest (ref4u, -1.0_4)
+ ref8d = nearest (ref8u, -1.0_8)
+ ref10d = nearest (ref10u, -1.0_xp)
+ ref16d = nearest (ref16u, -1.0_qp)
+
+ round = 'up'
+ call t()
+ if (r4p /= ref4u .or. r4m /= -ref4d) call abort()
+ if (r8p /= ref8u .or. r8m /= -ref8d) call abort()
+ if (r10p /= ref10u .or. r10m /= -ref10d) call abort()
+ if (r16p /= ref16u .or. r16m /= -ref16d) call abort()
+
+ round = 'down'
+ call t()
+ if (r4p /= ref4d .or. r4m /= -ref4u) call abort()
+ if (r8p /= ref8d .or. r8m /= -ref8u) call abort()
+ if (r10p /= ref10d .or. r10m /= -ref10u) call abort()
+ if (r16p /= ref16d .or. r16m /= -ref16u) call abort()
+
+ round = 'zero'
+ call t()
+ if (r4p /= ref4d .or. r4m /= -ref4d) call abort()
+ if (r8p /= ref8d .or. r8m /= -ref8d) call abort()
+ if (r10p /= ref10d .or. r10m /= -ref10d) call abort()
+ if (r16p /= ref16d .or. r16m /= -ref16d) call abort()
+
+ round = 'nearest'
+ call t()
+ if (r4p /= ref4u .or. r4m /= -ref4u) call abort()
+ if (r8p /= ref8u .or. r8m /= -ref8u) call abort()
+ if (r10p /= ref10u .or. r10m /= -ref10u) call abort()
+ if (r16p /= ref16u .or. r16m /= -ref16u) call abort()
+
+! Same as nearest (but rounding towards zero if there is a tie
+! [does not apply here])
+ round = 'compatible'
+ call t()
+ if (r4p /= ref4u .or. r4m /= -ref4u) call abort()
+ if (r8p /= ref8u .or. r8m /= -ref8u) call abort()
+ if (r10p /= ref10u .or. r10m /= -ref10u) call abort()
+ if (r16p /= ref16u .or. r16m /= -ref16u) call abort()
+contains
+ subroutine t()
+! print *, round
+ str = "0.1 0.1 0.1 0.1"
+ read (str, *,round=round) r4p, r8p, r10p, r16p
+! write (*, '(*(g0:" "))') r4p, r8p, r10p, r16p
+ str = "-0.1 -0.1 -0.1 -0.1"
+ read (str, *,round=round) r4m, r8m, r10m, r16m
+! write (*, *) r4m, r8m, r10m, r16m
+ end subroutine t
+end program main
+2013-07-21 Tobias Burnus <burnus@net-b.de>
+ Uros Bizjak <ubizjak@gmail.com>
+
+ PR fortran/35862
+ * libgfortran.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): New prototypes.
+ * config/fpu-387.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): New functions.
+ * config/fpu-aix.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): Ditto.
+ * config/fpu-generic.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): Ditto.
+ * config/fpu-glibc.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): Ditto.
+ * config/fpu-sysv.h (set_fpu_rounding_mode,
+ get_fpu_rounding_mode): Ditto.
+ * configure.ac: Check for fp_rnd and fp_rnd_t.
+ * io/io.h (enum unit_round): Use GFC_FPE_* for the value.
+ * io/read.c (convert_real): Set FP ronding mode.
+ * Makefile.in: Regenerate.
+ * aclocal.m4: Regenerate.
+ * config.h.in: Regenerate.
+ * configure: Regenerate.
+
2013-06-24 Tobias Burnus <burnus@net-b.de>
* configure.ac: Check for fp_except and fp_except_t.
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+# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
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+# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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/* Define to 1 if the system has the type `fp_except_t'. */
#undef HAVE_FP_EXCEPT_T
+/* Define to 1 if the system has the type `fp_rnd'. */
+#undef HAVE_FP_RND
+
+/* Define to 1 if the system has the type `fp_rnd_t'. */
+#undef HAVE_FP_RND_T
+
/* fp_trap is present */
#undef HAVE_FP_TRAP
#endif
}
-/* i387 -- see linux <fpu_control.h> header file for details. */
+/* i387 exceptions -- see linux <fpu_control.h> header file for details. */
#define _FPU_MASK_IM 0x01
#define _FPU_MASK_DM 0x02
#define _FPU_MASK_ZM 0x04
#define _FPU_EX_ALL 0x3f
-void set_fpu (void)
+/* i387 rounding modes. */
+
+#define _FPU_RC_NEAREST 0x0
+#define _FPU_RC_DOWN 0x400
+#define _FPU_RC_UP 0x800
+#define _FPU_RC_ZERO 0xc00
+
+#define _FPU_RC_MASK 0xc00
+
+
+void
+set_fpu (void)
{
int excepts = 0;
unsigned short cw;
return result;
}
+
+void
+set_fpu_rounding_mode (int round)
+{
+ int round_mode;
+ unsigned short cw;
+
+ switch (round)
+ {
+ case GFC_FPE_TONEAREST:
+ round_mode = _FPU_RC_NEAREST;
+ break;
+ case GFC_FPE_UPWARD:
+ round_mode = _FPU_RC_UP;
+ break;
+ case GFC_FPE_DOWNWARD:
+ round_mode = _FPU_RC_DOWN;
+ break;
+ case GFC_FPE_TOWARDZERO:
+ round_mode = _FPU_RC_ZERO;
+ break;
+ default:
+ return; /* Should be unreachable. */
+ }
+
+ __asm__ __volatile__ ("fnstcw\t%0" : "=m" (cw));
+
+ cw &= ~FPU_RC_MASK;
+ cw |= round_mode;
+
+ __asm__ __volatile__ ("fldcw\t%0" : : "m" (cw));
+
+ if (has_sse())
+ {
+ unsigned int cw_sse;
+
+ __asm__ __volatile__ ("%vstmxcsr\t%0" : "=m" (cw_sse));
+
+ /* The SSE round control bits are shifted by 3 bits. */
+ cw_sse &= ~(FPU_RC_MASK << 3);
+ cw_sse |= round_mode << 3;
+
+ __asm__ __volatile__ ("%vldmxcsr\t%0" : : "m" (cw_sse));
+ }
+}
+
+int
+get_fpu_rounding_mode (void)
+{
+ unsigned short cw;
+
+ __asm__ __volatile__ ("fnstcw\t%0" : "=m" (cw));
+
+ cw &= FPU_RC_MASK;
+
+ switch (cw)
+ {
+ case _FPU_RC_NEAREST:
+ return GFC_FPE_TONEAREST;
+ case _FPU_RC_UP:
+ return GFC_FPE_UPWARD;
+ case _FPU_RC_DOWN:
+ return GFC_FPE_DOWNWARD;
+ case _FPU_RC_ZERO:
+ return GFC_FPE_TOWARDZERO;
+ default:
+ return GFC_FPE_INVALID; /* Should be unreachable. */
+ }
+}
return result;
}
+
+
+int
+get_fpu_rounding_mode (void)
+{
+ int rnd_mode;
+
+ rnd_mode = fegetround ();
+
+ switch (rnd_mode)
+ {
+#ifdef FE_TONEAREST
+ case FE_TONEAREST:
+ return GFC_FPE_TONEAREST;
+#endif
+
+#ifdef FE_UPWARD
+ case FE_UPWARD:
+ return GFC_FPE_UPWARD;
+#endif
+
+#ifdef FE_DOWNWARD
+ case FE_DOWNWARD:
+ return GFC_FPE_DOWNWARD;
+#endif
+
+#ifdef FE_TOWARDZERO
+ case FE_TOWARDZERO:
+ return GFC_FPE_TOWARDZERO;
+#endif
+ default:
+ return GFC_FPE_INVALID;
+ }
+}
+
+
+void
+set_fpu_rounding_mode (int mode)
+{
+ int rnd_mode;
+
+ switch (mode)
+ {
+#ifdef FE_TONEAREST
+ case GFC_FPE_TONEAREST:
+ rnd_mode = FE_TONEAREST;
+ break;
+#endif
+
+#ifdef FE_UPWARD
+ case GFC_FPE_UPWARD:
+ rnd_mode = FE_UPWARD;
+ break;
+#endif
+
+#ifdef FE_DOWNWARD
+ case GFC_FPE_DOWNWARD:
+ rnd_mode = FE_DOWNWARD;
+ break;
+#endif
+
+#ifdef FE_TOWARDZERO
+ case GFC_FPE_TOWARDZERO:
+ rnd_mode = FE_TOWARDZERO;
+ break;
+#endif
+ default:
+ return;
+ }
+
+ fesetround (rnd_mode);
+}
{
return 0;
}
+
+
+int
+get_fpu_rounding_mode (void)
+{
+ return 0;
+}
+
+
+void
+set_fpu_rounding_mode (int round __attribute__((unused)))
+{
+}
return result;
}
+
+
+int
+get_fpu_rounding_mode (void)
+{
+ int rnd_mode;
+
+ rnd_mode = fegetround ();
+
+ switch (rnd_mode)
+ {
+#ifdef FE_TONEAREST
+ case FE_TONEAREST:
+ return GFC_FPE_TONEAREST;
+#endif
+
+#ifdef FE_UPWARD
+ case FE_UPWARD:
+ return GFC_FPE_UPWARD;
+#endif
+
+#ifdef FE_DOWNWARD
+ case FE_DOWNWARD:
+ return GFC_FPE_DOWNWARD;
+#endif
+
+#ifdef FE_TOWARDZERO
+ case FE_TOWARDZERO:
+ return GFC_FPE_TOWARDZERO;
+#endif
+ default:
+ return GFC_FPE_INVALID;
+ }
+}
+
+
+void
+set_fpu_rounding_mode (int mode)
+{
+ int rnd_mode;
+
+ switch (mode)
+ {
+#ifdef FE_TONEAREST
+ case GFC_FPE_TONEAREST:
+ rnd_mode = FE_TONEAREST;
+ break;
+#endif
+
+#ifdef FE_UPWARD
+ case GFC_FPE_UPWARD:
+ rnd_mode = FE_UPWARD;
+ break;
+#endif
+
+#ifdef FE_DOWNWARD
+ case GFC_FPE_DOWNWARD:
+ rnd_mode = FE_DOWNWARD;
+ break;
+#endif
+
+#ifdef FE_TOWARDZERO
+ case GFC_FPE_TOWARDZERO:
+ rnd_mode = FE_TOWARDZERO;
+ break;
+#endif
+ default:
+ return;
+ }
+
+ fesetround (rnd_mode);
+}
return result;
}
+
+
+int
+get_fpu_rounding_mode (void)
+{
+ switch (fpgetround ())
+ {
+#ifdef FP_RN
+ case FP_RN:
+ return GFC_FPE_TONEAREST;
+#endif
+
+#ifdef FP_RP
+ case FP_RP:
+ return GFC_FPE_UPWARD;
+#endif
+
+#ifdef FP_RM
+ case FP_RM:
+ return GFC_FPE_DOWNWARD;
+#endif
+
+#ifdef FP_RZ
+ case FP_RZ:
+ return GFC_FPE_TOWARDZERO;
+#endif
+ default:
+ return GFC_FPE_INVALID;
+ }
+}
+
+
+void
+set_fpu_rounding_mode (int mode)
+{
+#if HAVE_FP_RND
+ fp_rnd rnd_mode;
+#elif HAVE_FP_RND_T
+ fp_rnd_t rnd_mode;
+#else
+ choke me
+#endif
+
+ switch (mode)
+ {
+#ifdef FP_RN
+ case GFC_FPE_TONEAREST:
+ rnd_mode = FP_RN;
+ break;
+#endif
+
+#ifdef FP_RP
+ case GFC_FPE_UPWARD:
+ rnd_mode = FP_RP;
+ break;
+#endif
+
+#ifdef FP_RM
+ case GFC_FPE_DOWNWARD:
+ rnd_mode = FP_RM;
+ break;
+#endif
+
+#ifdef FP_RZ
+ case GFC_FPE_TOWARDZERO:
+ rnd_mode = FP_RZ;
+ break;
+#endif
+ default:
+ return;
+ }
+ fpsetround (rnd_mode);
+}
am__fastdepCC_FALSE
am__fastdepCC_TRUE
CCDEPMODE
-am__nodep
AMDEPBACKSLASH
AMDEP_FALSE
AMDEP_TRUE
# We need awk for the "check" target. The system "awk" is bad on
# some platforms.
-# Always define AMTAR for backward compatibility. Yes, it's still used
-# in the wild :-( We should find a proper way to deprecate it ...
-AMTAR='$${TAR-tar}'
+# Always define AMTAR for backward compatibility.
-am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
+AMTAR=${AMTAR-"${am_missing_run}tar"}
+
+am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'
if test "x$enable_dependency_tracking" != xno; then
am_depcomp="$ac_aux_dir/depcomp"
AMDEPBACKSLASH='\'
- am__nodep='_no'
fi
if test "x$enable_dependency_tracking" != xno; then
AMDEP_TRUE=
# instance it was reported that on HP-UX the gcc test will end up
# making a dummy file named `D' -- because `-MD' means `put the output
# in D'.
- rm -rf conftest.dir
mkdir conftest.dir
# Copy depcomp to subdir because otherwise we won't find it if we're
# using a relative directory.
break
fi
;;
- msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+ msvisualcpp | msvcmsys)
# This compiler won't grok `-c -o', but also, the minuso test has
# not run yet. These depmodes are late enough in the game, and
# so weak that their functioning should not be impacted.
# instance it was reported that on HP-UX the gcc test will end up
# making a dummy file named `D' -- because `-MD' means `put the output
# in D'.
- rm -rf conftest.dir
mkdir conftest.dir
# Copy depcomp to subdir because otherwise we won't find it if we're
# using a relative directory.
break
fi
;;
- msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+ msvisualcpp | msvcmsys)
# This compiler won't grok `-c -o', but also, the minuso test has
# not run yet. These depmodes are late enough in the game, and
# so weak that their functioning should not be impacted.
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12338 "configure"
+#line 12334 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12444 "configure"
+#line 12440 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
_ACEOF
+fi
+
+ac_fn_c_check_type "$LINENO" "fp_rnd" "ac_cv_type_fp_rnd" "#include <ieeefp.h>
+"
+if test "x$ac_cv_type_fp_rnd" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_FP_RND 1
+_ACEOF
+
+
+fi
+ac_fn_c_check_type "$LINENO" "fp_rnd_t" "ac_cv_type_fp_rnd_t" "#include <ieeefp.h>
+"
+if test "x$ac_cv_type_fp_rnd_t" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_FP_RND_T 1
+_ACEOF
+
+
fi
# Check for SysV fpsetmask
LIBGFOR_CHECK_FPSETMASK
AC_CHECK_TYPES([fp_except,fp_except_t], [], [], [[#include <ieeefp.h>]])
+AC_CHECK_TYPES([fp_rnd,fp_rnd_t], [], [], [[#include <ieeefp.h>]])
# Check for AIX fp_trap and fp_enable
AC_CHECK_FUNC([fp_trap],[have_fp_trap=yes AC_DEFINE([HAVE_FP_TRAP],[1],[fp_trap is present])])
unit_encoding;
typedef enum
-{ ROUND_UP, ROUND_DOWN, ROUND_ZERO, ROUND_NEAREST, ROUND_COMPATIBLE,
- ROUND_PROCDEFINED, ROUND_UNSPECIFIED }
+{ ROUND_UP = GFC_FPE_UPWARD,
+ ROUND_DOWN = GFC_FPE_DOWNWARD,
+ ROUND_ZERO = GFC_FPE_TOWARDZERO,
+ ROUND_NEAREST = GFC_FPE_TONEAREST,
+ ROUND_COMPATIBLE = 10, /* round away from zero. */
+ ROUND_PROCDEFINED, /* Here as ROUND_NEAREST. */
+ ROUND_UNSPECIFIED /* Should never occur. */
+}
unit_round;
/* NOTE: unit_sign must correspond with the sign_status enumerator in
convert_real (st_parameter_dt *dtp, void *dest, const char *buffer, int length)
{
char *endptr = NULL;
+ int round_mode, old_round_mode;
+
+ switch (dtp->u.p.current_unit->round_status)
+ {
+ case ROUND_COMPATIBLE:
+ /* FIXME: As NEAREST but round away from zero for a tie. */
+ case ROUND_UNSPECIFIED:
+ /* Should not occur. */
+ case ROUND_PROCDEFINED:
+ round_mode = ROUND_NEAREST;
+ break;
+ default:
+ round_mode = dtp->u.p.current_unit->round_status;
+ break;
+ }
+
+ old_round_mode = get_fpu_rounding_mode();
+ set_fpu_rounding_mode (round_mode);
switch (length)
{
internal_error (&dtp->common, "Unsupported real kind during IO");
}
+ set_fpu_rounding_mode (old_round_mode);
+
if (buffer == endptr)
{
generate_error (&dtp->common, LIBERROR_READ_VALUE,
extern void set_fpu (void);
internal_proto(set_fpu);
+
extern int get_fpu_except_flags (void);
internal_proto(get_fpu_except_flags);
+extern void set_fpu_rounding_mode (int round);
+internal_proto(set_fpu_rounding_mode);
+
+extern int get_fpu_rounding_mode (void);
+internal_proto(get_fpu_rounding_mode);
+
/* memory.c */
extern void *xmalloc (size_t) __attribute__ ((malloc));
projects / thirdparty / gcc.git / commitdiff
