[Bug target/19602] New: -mno-80387 should define __NO_MATH_INLINES

[Bug target/19602] New: -mno-80387 should define __NO_MATH_INLINES

[uros at kss-loka dot si]

This testcase will fail with '-O2 -ffast-math -mno-80387':

#include <math.h>
double test(double x) {
        return sin(x);
}

sin.c: In function 'test':
/usr/include/bits/mathinline.h:456: error: impossible constraint in 'asm'

Adding -D__NO_MATH_INLINES to compile flags fixes this problem.

-- 
           Summary: -mno-80387 should define __NO_MATH_INLINES
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: uros at kss-loka dot si
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-pc-linux-gnu
  GCC host triplet: i386-pc-linux-gnu
GCC target triplet: i386-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19602

[Bug target/19602] -mno-80387 should define __NO_MATH_INLINES

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-24 07:36 -------
glibc is fucked up really, it should not do this.  We really should define it always because almost always 
get better than glibc (especially with the tree-ssa).

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19602

[Bug target/19602] -mno-80387 or -mfpmath=sse should define __NO_MATH_INLINES

[uros at kss-loka dot si]

------- Additional Comments From uros at kss-loka dot si  2005-04-29 19:34 -------
Hm, I would also suggest setting __NO_MATH_INLINES for -mfpmath=sse to prevent
the performance degradation for XMM->x87 registers when x87 ASM code is included
from mathinlines.h. x87 intrinsics are disabled for the same reason!

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|-mno-80387 should define    |-mno-80387 or -mfpmath=sse
                   |__NO_MATH_INLINES           |should define
                   |                            |__NO_MATH_INLINES


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19602

[Bug target/19602] -mno-80387 or -mfpmath=sse should define __NO_MATH_INLINES

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2005-04-30 00:21 -------
We will not be setting __NO_MATH_INLINES for any reason.  Work with glibc to get
the inlines disabled at the source under the correct conditions.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19602