Fixed.
thanks,
David
On Sat, Dec 1, 2012 at 4:08 PM, Steven Bosscher wrote:
> On Sat, Dec 1, 2012 at 6:50 AM, Xinliang David Li wrote:
>> 2010-11-30 Xinliang David Li <>
>>
>> * config/i386/i386.c: Allow sign extend instructions (cltd etc)
>> on modern CPUs.
>
> You installed
On Sat, Dec 1, 2012 at 6:50 AM, Xinliang David Li wrote:
> 2010-11-30 Xinliang David Li <>
>
> * config/i386/i386.c: Allow sign extend instructions (cltd etc)
> on modern CPUs.
You installed the patch without the ChangeLog entry...
(http://gcc.gnu.org/ml/gcc-cvs/2012-12/msg00027.
Hello!
> The following proposed patch fixed the problem. Note that for Atom,
> only the CWD instruction is slow with 5 cycle latency, the rest sign
> extension instructions are fast -- the fix for Atom needs finer grain
> control and can be done separately.
>
> 2010-11-30 Xinliang David Li
>
>
Compiling the following code with O2
typedef unsigned long ulong;
typedef __SIZE_TYPE__ size_t;
long woo_i(long a, long b) { return a/b; }
GCC generates:
.LFB0:
.cfi_startproc
movq%rdi, %rdx
movq%rdi, %rax
sarq$63, %rdx
idivq %rsi
ret
