[Bug c/39037] New: FLOAT_CONST_DECIMAL64 pragma not supported

[Bug c/39037] New: FLOAT_CONST_DECIMAL64 pragma not supported

[tydeman at tybor dot com]

Using gcc 4.3.2-7 on Intel Pentium 4 running Linux Fedora Core 10 with
-std=gnu99

/* DFP TR 24732 == WG14 / N1312 */
#define __STDC_WANT_DEC_FP__ /* Tell implementation that we want Decimal FP */
#pragma STDC FLOAT_CONST_DECIMAL64 ON /* unsuffixed => Decimal (not Binary) */

_Decimal64 d10 = 1.0DD / 3.0 ;     /* 3.0 should be treated as 3.0DD */

gets:

test7.c:5: warning: ISO C does not support decimal floating point
test7.c:5:18: warning: decimal float constants are a GCC extension
test7.c:5: error: can't mix operands of decimal float and other float types

NOTE:  This pragma is new with WG14 N1312 version of Decimal Floating Point
Technical Report (it replaced Translation Time Data Type (TTDT)).


-- 
           Summary: FLOAT_CONST_DECIMAL64 pragma not supported
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tydeman at tybor dot com
  GCC host triplet: 4.3.2
GCC target triplet: 4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[janis at gcc dot gnu dot org]

------- Comment #1 from janis at gcc dot gnu dot org  2009-01-30 18:30 -------
Is N1312 available online?  I had not heard of any version later than N1290.


-- 

janis at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bje at gcc dot gnu dot org,
                   |                            |hjl at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[hjl dot tools at gmail dot com]

------- Comment #2 from hjl dot tools at gmail dot com  2009-01-30 18:41 -------
(In reply to comment #1)
> Is N1312 available online?  I had not heard of any version later than N1290.
> 

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1312.pdf


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[janis at gcc dot gnu dot org]

-- 

janis at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |janis at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-01-30 22:03:26
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[janis at gcc dot gnu dot org]

------- Comment #3 from janis at gcc dot gnu dot org  2009-05-07 22:34 -------
Subject: Bug 39037

Author: janis
Date: Thu May  7 22:34:08 2009
New Revision: 147259

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147259
Log:
gcc/
        PR c/39037
        * c-common.h (mark_valid_location_for_stdc_pragma,
        valid_location_for_stdc_pragma_p, set_float_const_decimal64,
        clear_float_const_decimal64, float_const_decimal64_p): New.
        * c.opt (Wunsuffixed-float-constants): New.
        * c-lex.c (interpret_float): Use pragma FLOAT_CONST_DECIMAL64 for
        unsuffixed float constant, handle new warning.
        * c-cppbuiltin.c (c_cpp_builtins): Use cast for double constants.
        * c-decl.c (c_scope): New flag float_const_decimal64.
        (set_float_const_decimal64, clear_float_const_decimal64,
        float_const_decimal64_p): New.
        (push_scope): Set new flag.
        * c-parser.c (c_parser_translation_unit): Mark when it's valid
        to use STDC pragmas.
        (c_parser_external_declaration): Ditto.
        (c_parser_compound_statement_nostart): Ditto.
        * c-pragma.c (valid_location_for_stdc_pragma,
        mark_valid_location_for_stdc_pragma,
        valid_location_for_stdc_pragma_p, handle_stdc_pragma,
        handle_pragma_float_const_decimal64): New.
        (init_pragma): Register new pragma FLOAT_CONST_DECIMAL64.
        * cp/semantics.c (valid_location_for_stdc_pragma_p,
        set_float_const_decimal64, clear_float_const_decimal64,
        float_const_decimal64_p): New dummy functions.
        * doc/extend.texi (Decimal Float): Remove statement that the
        pragma, and suffix for double constants, are not supported.
        * doc/invoke.texi (Warning Options): List new option.
        (-Wunsuffixed-float-constants): New.

gcc/testsuite
        PR c/39037
        * gcc.dg/Wunsuffixed-float-constants-1.c: New test.
        * gcc.dg/cpp/pragma-float-const-decimal64-1.c: New test.
        * gcc.dg/dfp/float-constant-double.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-1.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-2.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-3.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-4.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-5.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-6.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-7.c: New test.
        * gcc.dg/dfp/pragma-float-const-decimal64-8.c: New test.
        * g++.dg/cpp/pragma-float-const-decimal64-1.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp/pragma-float-const-decimal64-1.C
    trunk/gcc/testsuite/gcc.dg/Wunsuffixed-float-constants-1.c
    trunk/gcc/testsuite/gcc.dg/cpp/pragma-float-const-decimal64-1.c
    trunk/gcc/testsuite/gcc.dg/dfp/float-constant-double.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-1.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-2.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-3.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-4.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-5.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-6.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-7.c
    trunk/gcc/testsuite/gcc.dg/dfp/pragma-float-const-decimal64-8.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-common.h
    trunk/gcc/c-cppbuiltin.c
    trunk/gcc/c-decl.c
    trunk/gcc/c-lex.c
    trunk/gcc/c-parser.c
    trunk/gcc/c-pragma.c
    trunk/gcc/c.opt
    trunk/gcc/cp/semantics.c
    trunk/gcc/doc/extend.texi
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[janis at gcc dot gnu dot org]

------- Comment #4 from janis at gcc dot gnu dot org  2010-01-13 23:15 -------
This is fixed for GCC 4.5.0.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[vincent at vinc17 dot org]

------- Comment #5 from vincent at vinc17 dot org  2010-04-07 10:58 -------
This bug should probably be resolved as fixed as well.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037

[Bug c/39037] FLOAT_CONST_DECIMAL64 pragma not supported

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-04-07 11:06 -------
Fixed.


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39037