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fixed: the problem with GCC optimization on x86_64

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sometimes when using -O2 or -O3 GCC doesn't set correctly
         the stack pointer (actually the stack is used for other things)
         and you can't use instructions like push/pop in assembler code.
         All the asm code in x86_64 have been rewritten, now instructions
         push/pop are not used, other thing which have access to stack 
         (like "m" (mask) constraints in Rcl2 and Rcr2) have also gone away,
         now the library works well with -O2 and -O3 and the asm code
         is a little faster



git-svn-id: svn://ttmath.org/publicrep/ttmath/trunk@127 e52654a7-88a9-db11-a3e9-0013d4bc506e
This commit is contained in:
Tomasz Sowa
2009-05-05 07:20:10 +00:00
parent 85945b2bb0
commit e665f91682
3 changed files with 86 additions and 129 deletions
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@@ -1,7 +1,16 @@
Version 0.8.4 prerelease (2009.05.04):
Version 0.8.4 prerelease (2009.05.05):
* fixed: UInt::DivInt() didn't check whether the divisor is zero
there was a hardware interruption when the divisor was zero
(now the method returns one)
* fixed: the problem with GCC optimization on x86_64
sometimes when using -O2 or -O3 GCC doesn't set correctly
the stack pointer (actually the stack is used for other things)
and you can't use instructions like push/pop in assembler code.
All the asm code in x86_64 have been rewritten, now instructions
push/pop are not used, other thing which have access to stack
(like "m" (mask) constraints in Rcl2 and Rcr2) have also gone away,
now the library works well with -O2 and -O3 and the asm code
is a little faster
* added: UInt::PrintLog(const char * msg, std::ostream & output)
used (for debugging purposes) by macro TTMATH_LOG(msg)
(it is used in nearly all methods in UInt class)