+.4h
> +** uaddw v[0-9]+.4s, v[0-9]+.4s, v[0-9]+.4h
> +** uzp2v[0-9]+.8h, v[0-9]+.8h, v[0-9]+.8h
> +** ...
> +*/
> +void draw_bitmap3(uint16_t* restrict pixel, uint16_t level, int n)
> +{
> + for (int i = 0; i < (n & -16); i+=1)
> +pixel[i] = (pixel[i] * lev
+** uaddw v[0-9]+.4s, v[0-9]+.4s, v[0-9]+.4h
> +** uzp2v[0-9]+.8h, v[0-9]+.8h, v[0-9]+.8h
> +** ...
> +*/
> +void draw_bitmap3(uint16_t* restrict pixel, uint16_t level, int n) {
> + for (int i = 0; i < (n & -16); i+=1)
> +pixel[i] = (pixel[i] * level) / 0
fffUL;
+}
> -Original Message-
> From: Tamar Christina
> Sent: Friday, September 23, 2022 10:34 AM
> To: gcc-patches@gcc.gnu.org
> Cc: nd ; Richard Earnshaw ;
> Marcus Shawcroft ; Kyrylo Tkachov
> ; Richard Sandiford
>
> Subject: [PATCH 2/4]AArch64 Add implementa
Hi All,
This adds an implementation for the new optab for unsigned pow2 bitmask for
AArch64.
The implementation rewrites:
x = y / (2 ^ (sizeof (y)/2)-1
into e.g. (for bytes)
(x + ((x + 257) >> 8)) >> 8
where it's required that the additions be done in double the precision of x
such that
