Displaying 2 results from an estimated 2 matches for "vcreate_u32".
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2010 Nov 12
2
[LLVMdev] Simple NEON optimization
Hi folks, me again,
So, I want to implement a simple optimization in a NEON case I've seen
these days, most as a matter of exercise, but it also simplifies (just
a bit) the code generated.
The case is simple:
uint32x2_t x, res;
res = vceq_u32(x, vcreate_u32(0));
This will generate the following code:
; zero d16
vmov.i32 d16, #0x0
; load a into d17
movw r0, :lower16:a
movt r0, :upper16:a
vld1.32 {d17}, [r0]
; compare two registers
vceq.i32 d17, d17, d16
But, because...
2010 Nov 12
0
[LLVMdev] Simple NEON optimization
...again,
>
> So, I want to implement a simple optimization in a NEON case I've seen
> these days, most as a matter of exercise, but it also simplifies (just
> a bit) the code generated.
>
> The case is simple:
>
> uint32x2_t x, res;
> res = vceq_u32(x, vcreate_u32(0));
>
> This will generate the following code:
>
> ; zero d16
> vmov.i32 d16, #0x0
> ; load a into d17
> movw r0, :lower16:a
> movt r0, :upper16:a
> vld1.32 {d17}, [r0]
> ; compare two registers
>...