Hi Christophe,
On 11/12/19 10:29 AM, Christophe Lyon wrote:
On Thu, 7 Nov 2019 at 11:26, Kyrill Tkachov wrote:
Hi all,
This patch adds the plumbing for and an implementation of the saturation
intrinsics from ACLE [1], in particular the __ssat, __usat intrinsics.
These intrinsics set the Q sti
On Thu, 7 Nov 2019 at 11:26, Kyrill Tkachov wrote:
>
> Hi all,
>
> This patch adds the plumbing for and an implementation of the saturation
> intrinsics from ACLE [1], in particular the __ssat, __usat intrinsics.
> These intrinsics set the Q sticky bit in APSR if an overflow occurred.
> ACLE allow
Hi Richard,
On 11/9/19 12:44 PM, Richard Henderson wrote:
On 11/7/19 11:26 AM, Kyrill Tkachov wrote:
-;; The code sequence emitted by this insn pattern uses the Q flag, which GCC
-;; doesn't generally know about, so we don't bother expanding to individual
-;; instructions. It may be better to
> +;; define_subst and associated attributes
> +
> +(define_subst "add_setq"
> + [(set (match_operand:SI 0 "" "")
> +(match_operand:SI 1 "" ""))]
> + ""
> + [(set (match_dup 0)
> +(match_dup 1))
> + (set (reg:CC APSRQ_REGNUM)
> + (unspec:CC [(reg:CC APSRQ_REGNUM)] UNSPEC_Q_
Hi all,
This patch adds the plumbing for and an implementation of the saturation
intrinsics from ACLE [1], in particular the __ssat, __usat intrinsics.
These intrinsics set the Q sticky bit in APSR if an overflow occurred.
ACLE allows the user to read that bit (within the same function, it's not
