Hi,
With respect to the MPFR build error,
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58578), is movs appropraite
as shown below? When _err1 is negative the condition is evaluating it to
be true.
/* C Codeoes */
if (_err1 > 0)
{
/* working code */
.loc 1 67 0
cmp r3, #0
ble .L6
/* not working code*/
.loc 1 67 0
movs r3, r3, asl #1
ble .L6
When I looked at the ARM documents, I found the following
Condition flags
-------------------
If S is specified, for MOV instructions:
1. update the N and Z flags according to the result
2. can update the C flag during the calculation of Operand2 (see
Flexible second operand)
3. do not affect the V flag.
And also
le Signed less than or equal. (Z==1) || (N!=V)
Does this means we cant movs at comparision.
http://gcc.gnu.org/ml/gcc-patches/2013-02/msg00861.html added this and I
guess it is intentional.
Am I missing anything here?
Thanks,
Kugan
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