This should enable 64bit math on 64bit architecures besides amd64 (like
ppc64, sparc64 and so on)
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
There is a bugzilla entry at clamav [0] reports a problem on s390x
"mul/fp_mul_comba_20.c:91: warning: right shift count >= width of type"
because fp_digit is 64bit and according to the comment it should be
smaller.
s390x is 64bit platform i.e. long and long long are both 64bit. The
same is true for ppc64, arm64 or sparc64 (RIP alpha).
The headerfile seems only to define FP_64BIT on x86_64.
The current code seems to define SIZEOF_FP_DIGIT either to 8 (64bit) or
to 4 in the else case and 4 looks like int and not long. Therefore the
change here.
If this change makes no sense and you would prefer to use something like
#if __SIZEOF_LONG__ == 8
#define FP_64BIT
#endif
to autodetect a 64bit platform then we could try do this instead. I
haven't tested this patch nor verified that the problem still occures.
If you have no obvious solution and would like to have a confirmation
that this patch solves a problem I could try to get my hands on
something not x86 with 64bit in order to verify.
[0] https://bugzilla.clamav.net/show_bug.cgi?id=9017
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
It is not implemened yet, just added to the headerfile. Therefore I don't
think it is a ABI breakage if I change maxlen from int to unsigned int.
The function releases fp_toradix() for the work which in turn now calls
fp_toradix_n() with a largest possible maxlen parameter.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
