On 14/01/15 15:31, Jiong Wang wrote:
> as discussed here https://gcc.gnu.org/ml/gcc-patches/2015-01/msg00563.html
>
> the problem is aarch64 hardware only support left shift truncation for SI/DI,
> while SHIFT_COUNT_TRUNCATED is enabled for all mode including QI/HI, which is
> inconsistent with ha
On 16 January 2015 at 11:17, Jiong Wang wrote:
> exactly, thanks, we should use FAIL although DONE and FAIL work the same in
> this scenario.
>
> I checked their definition, FAIL always return the initial value of _val
> which is NULL,
> while DONE stop and return generated insns which for this p
On 16/01/15 10:50, Marcus Shawcroft wrote:
On 14 January 2015 at 15:31, Jiong Wang wrote:
2015-01-15 Jiong. Wang (jiong.w...@arm.com)
gcc/
PR64304
* config/aarch64/aarch64.md (define_insn "*ashl3_insn"): Deleted.
(ashl3): Don't expand if operands[2] is not constant.
gcc/testsuite/
*
On 14 January 2015 at 15:31, Jiong Wang wrote:
> 2015-01-15 Jiong. Wang (jiong.w...@arm.com)
> gcc/
> PR64304
> * config/aarch64/aarch64.md (define_insn "*ashl3_insn"): Deleted.
> (ashl3): Don't expand if operands[2] is not constant.
>
> gcc/testsuite/
> * gcc.target/aarch64/pr64304.c: New
as discussed here https://gcc.gnu.org/ml/gcc-patches/2015-01/msg00563.html
the problem is aarch64 hardware only support left shift truncation for SI/DI,
while SHIFT_COUNT_TRUNCATED is enabled for all mode including QI/HI, which is
inconsistent with hardware feature.
there are two patterns define
