[PATCH] fortran: Extend -fconvert= option for ppc64le r16_ieee and r16_ibm

[Jakub Jelinek via Gcc-patches]

Hi!

This patch on top of the previously posted option handling changes patch
allows specifying -fconvert=swap,r16_ieee etc. (but will error on it
when not on powerpc64le because in the library such swapping is only
implemented for HAVE_REAL_17).

Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?

2022-01-21  Jakub Jelinek  <ja...@redhat.com>

        * lang.opt (fconvert=): Add EnumSet property and mention also
        r16_ieee and r16_ibm arguments.
        (big-endian, little-endian, native, swap): Add Set(1) property.
        (r16_ieee, r16_ibm): New EnumValue entries with Set(2) property.
        * trans-types.cc (gfc_init_kinds): Emit gfc_fatal_error for
        -fconvert=r16_ieee or -fconvert=r16_ibm when R16_IEEE <=> R16_IBM
        conversions aren't supported.

--- gcc/fortran/lang.opt.jj     2022-01-11 23:49:52.167824673 +0100
+++ gcc/fortran/lang.opt        2022-01-21 15:15:15.494099716 +0100
@@ -421,23 +421,29 @@ Fortran
 Produce a warning at runtime if a array temporary has been created for a 
procedure argument.
 
 fconvert=
-Fortran RejectNegative Joined Enum(gfc_convert) Var(flag_convert) 
Init(GFC_FLAG_CONVERT_NATIVE)
--fconvert=<big-endian|little-endian|native|swap>       The endianness used for 
unformatted files.
+Fortran RejectNegative Joined Enum(gfc_convert) EnumSet Var(flag_convert) 
Init(GFC_FLAG_CONVERT_NATIVE)
+-fconvert=<big-endian|little-endian|native|swap|r16_ieee|r16_ibm>      The 
endianness used for unformatted files.
 
 Enum
 Name(gfc_convert) Type(enum gfc_convert) UnknownError(Unrecognized option to 
endianness value: %qs)
 
 EnumValue
-Enum(gfc_convert) String(big-endian) Value(GFC_FLAG_CONVERT_BIG)
+Enum(gfc_convert) String(big-endian) Value(GFC_FLAG_CONVERT_BIG) Set(1)
 
 EnumValue
-Enum(gfc_convert) String(little-endian) Value(GFC_FLAG_CONVERT_LITTLE)
+Enum(gfc_convert) String(little-endian) Value(GFC_FLAG_CONVERT_LITTLE) Set(1)
 
 EnumValue
-Enum(gfc_convert) String(native) Value(GFC_FLAG_CONVERT_NATIVE)
+Enum(gfc_convert) String(native) Value(GFC_FLAG_CONVERT_NATIVE) Set(1)
 
 EnumValue
-Enum(gfc_convert) String(swap) Value(GFC_FLAG_CONVERT_SWAP)
+Enum(gfc_convert) String(swap) Value(GFC_FLAG_CONVERT_SWAP) Set(1)
+
+EnumValue
+Enum(gfc_convert) String(r16_ieee) Value(GFC_FLAG_CONVERT_R16_IEEE) Set(2)
+
+EnumValue
+Enum(gfc_convert) String(r16_ibm) Value(GFC_FLAG_CONVERT_R16_IBM) Set(2)
 
 fcray-pointer
 Fortran Var(flag_cray_pointer)
--- gcc/fortran/trans-types.cc.jj       2022-01-18 11:58:59.579982099 +0100
+++ gcc/fortran/trans-types.cc  2022-01-21 20:26:29.438558960 +0100
@@ -527,6 +527,9 @@ gfc_init_kinds (void)
              }
          }
     }
+  else if ((flag_convert & (GFC_CONVERT_R16_IEEE | GFC_CONVERT_R16_IBM)) != 0)
+    gfc_fatal_error ("%<-fconvert=r16_ieee%> or %<-fconvert=r16_ibm%> not "
+                    "supported on this architecture");
 
   /* Choose the default integer kind.  We choose 4 unless the user directs us
      otherwise.  Even if the user specified that the default integer kind is 8,

        Jakub