[Bug target/47672] math-68881.h does not support C99
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 Jeffrey A. Law law at redhat dot com changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED CC||law at redhat dot com Resolution|--- |WONTFIX --- Comment #7 from Jeffrey A. Law law at redhat dot com --- math-m68881.h is obsolete and should not be used. There are no plans to fix/upgrade the contents of that file.
[Bug target/47672] math-68881.h does not support C99
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 Alan Hourihane alanh at fairlite dot co.uk changed: What|Removed |Added CC||alanh at fairlite dot co.uk --- Comment #3 from Alan Hourihane alanh at fairlite dot co.uk 2011-06-06 09:02:59 UTC --- Should math-68881.h be part of a OS's libc/libm then ?
[Bug target/47672] math-68881.h does not support C99
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 --- Comment #4 from Vincent Riviere vincent.riviere at freesbee dot fr 2011-06-06 19:06:07 UTC --- Normal math implementation should always reside inside libm, to fully support exceptions, error handling, etc. When better speed is required, and strict standard compliance is not required, a user can compile his program with -ffast-math. As a result, any call to sin() will be implemented by a single fsin instruction rather than a call to libm. The purpose is the same as math-68881.h. But the implementation is different: math-68881.h relies on the preprocessor, while -ffast-math is directly handled by GCC at low level for better register usage, etc. This is why ideally math-68881.h should be removed from GCC and -ffast-math always used by the users, when needed. However, someone reported that all the functionnality of math-68881.h was not reported to -ffast-math: some instructions are missing. So I propose the following roadmap: 1) Commit my proposed patch, then close this bug. This will fix the current math-68881.h for C99. I hit that problem when compiling libtiff. 2) Move the missing functionnality from math-68881.h to -ffast-math, then remove math-68881.h from GCC.
[Bug target/47672] math-68881.h does not support C99
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 --- Comment #5 from Mikael Pettersson mikpe at it dot uu.se 2011-06-06 19:54:58 UTC --- (In reply to comment #4) However, someone reported that all the functionnality of math-68881.h was not reported to -ffast-math: some instructions are missing. ... 2) Move the missing functionnality from math-68881.h to -ffast-math, then remove math-68881.h from GCC. I only see this PR and PR49295 mention math-68881.h, and neither PR lists any missing instructions. What specific instructions are missing from -ffast-math?
[Bug target/47672] math-68881.h does not support C99
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 --- Comment #6 from Vincent Riviere vincent.riviere at freesbee dot fr 2011-06-06 21:20:46 UTC --- What specific instructions are missing from -ffast-math? I don't know myself, but I have been told it was the case. http://gcc.gnu.org/ml/gcc/2011-02/msg00186.html
[Bug target/47672] math-68881.h does not support C99
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47672 --- Comment #2 from Andreas Schwab sch...@linux-m68k.org 2011-05-02 17:20:40 UTC --- I'd rather remove that file.
