Update copyright years.

[thirdparty/gcc.git] / libgfortran / config / fpu-glibc.h

diff --git a/libgfortran/config/fpu-glibc.h b/libgfortran/config/fpu-glibc.h
index 149e8a3ac92681ea24116afadfef6b6dfdbbd2f2..ff5f2f2b1a83f0443bbf57e5a6197757abdd45a7 100644 (file)
--- a/libgfortran/config/fpu-glibc.h
+++ b/libgfortran/config/fpu-glibc.h
@@ -1,5 +1,5 @@
 /* FPU-related code for systems with GNU libc.
-   Copyright (C) 2005-2014 Free Software Foundation, Inc.
+   Copyright (C) 2005-2024 Free Software Foundation, Inc.
    Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
 
 This file is part of the GNU Fortran runtime library (libgfortran).
@@ -39,48 +39,56 @@ _Static_assert (sizeof(fenv_t) <= (size_t) GFC_FPE_STATE_BUFFER_SIZE,
 
 void set_fpu_trap_exceptions (int trap, int notrap)
 {
+  int mode_set = 0, mode_clr = 0;
+
 #ifdef FE_INVALID
   if (trap & GFC_FPE_INVALID)
-    feenableexcept (FE_INVALID);
+    mode_set |= FE_INVALID;
   if (notrap & GFC_FPE_INVALID)
-    fedisableexcept (FE_INVALID);
+    mode_clr |= FE_INVALID;
 #endif
 
 /* Some glibc targets (like alpha) have FE_DENORMAL, but not many.  */
 #ifdef FE_DENORMAL
   if (trap & GFC_FPE_DENORMAL)
-    feenableexcept (FE_DENORMAL);
+    mode_set |= FE_DENORMAL;
   if (notrap & GFC_FPE_DENORMAL)
-    fedisableexcept (FE_DENORMAL);
+    mode_clr |= FE_DENORMAL;
 #endif
 
 #ifdef FE_DIVBYZERO
   if (trap & GFC_FPE_ZERO)
-    feenableexcept (FE_DIVBYZERO);
+    mode_set |= FE_DIVBYZERO;
   if (notrap & GFC_FPE_ZERO)
-    fedisableexcept (FE_DIVBYZERO);
+    mode_clr |= FE_DIVBYZERO;
 #endif
 
 #ifdef FE_OVERFLOW
   if (trap & GFC_FPE_OVERFLOW)
-    feenableexcept (FE_OVERFLOW);
+    mode_set |= FE_OVERFLOW;
   if (notrap & GFC_FPE_OVERFLOW)
-    fedisableexcept (FE_OVERFLOW);
+    mode_clr |= FE_OVERFLOW;
 #endif
 
 #ifdef FE_UNDERFLOW
   if (trap & GFC_FPE_UNDERFLOW)
-    feenableexcept (FE_UNDERFLOW);
+    mode_set |= FE_UNDERFLOW;
   if (notrap & GFC_FPE_UNDERFLOW)
-    fedisableexcept (FE_UNDERFLOW);
+    mode_clr |= FE_UNDERFLOW;
 #endif
 
 #ifdef FE_INEXACT
   if (trap & GFC_FPE_INEXACT)
-    feenableexcept (FE_INEXACT);
+    mode_set |= FE_INEXACT;
   if (notrap & GFC_FPE_INEXACT)
-    fedisableexcept (FE_INEXACT);
+    mode_clr |= FE_INEXACT;
 #endif
+
+  /* Clear stalled exception flags.  */
+  feclearexcept (FE_ALL_EXCEPT);
+
+  feenableexcept (mode_set);
+  fedisableexcept (mode_clr);
 }
 
 
@@ -333,8 +341,14 @@ get_fpu_rounding_mode (void)
       case FE_TOWARDZERO:
        return GFC_FPE_TOWARDZERO;
 #endif
+
+#ifdef FE_TONEARESTFROMZERO
+      case FE_TONEARESTFROMZERO:
+       return GFC_FPE_AWAY;
+#endif
+
       default:
-       return GFC_FPE_INVALID;
+       return 0; /* Should be unreachable.  */
     }
 }
 
@@ -369,8 +383,15 @@ set_fpu_rounding_mode (int mode)
        rnd_mode = FE_TOWARDZERO;
        break;
 #endif
+
+#ifdef FE_TONEARESTFROMZERO
+      case GFC_FPE_AWAY:
+       rnd_mode = FE_TONEARESTFROMZERO;
+       break;
+#endif
+
       default:
-       return;
+       return; /* Should be unreachable.  */
     }
 
   fesetround (rnd_mode);
@@ -410,8 +431,15 @@ support_fpu_rounding_mode (int mode)
        return 0;
 #endif
 
-      default:
+      case GFC_FPE_AWAY:
+#ifdef FE_TONEARESTFROMZERO
+       return 1;
+#else
        return 0;
+#endif
+
+      default:
+       return 0; /* Should be unreachable.  */
     }
 }