Pull following m68k softfloat fixes from upstream:
---
Revision 109143
2005-12-29  Paul Brook  <paul@codesourcery.com>
* config/m68k/fpgnulib.c (__extendsfdf2): Handle negative zero.
(__truncdfsf2): Ditto.
(__extenddfxf2): Ditto.
(__truncxfdf2): Ditto.
* config/m68k/lb1sf68.asm (__addsf3): Return -0.0 for -0.0 + -0.0.
(__adddf3): Ditto.
---
Revision 109145
2005-12-29  Paul Brook  <paul@codesourcery.com>
* config/m68k/lb1sf68.asm (__cmpdf2): Fix typo in immediate mask.
Create wrapper and rename body...
(__cmpdf2_internal): ... to this.  Return correct value for unordered
result.
(__cmpsf2): Create wrapper and rename body...
(__cmpsf2_internal): ... to this.  Return corerct value for unordered
result.
(__eqdf2, __nedf2, __gtdf2, __gedf2, __ltdf2, __ledf2): Use
__cmpdf2_internal.
(__eqsf2, __nesf2, __gtsf2, __gesf2, __ltsf2, __lesf2): Use
__cmpsf2_internal.
---
Revision 110744
* gcc/config/m68k/lb1sf68.asm (__divsf3, __divdf3, __mulsf3,
__muldf3): Return a correctly signed zero.
---

Note:
- lb1sf68.asm revision 110744 is still GPLv2.
- fpgnulib.c is not GPLed.

(tsutsui)