Hi,

I want to make a utility wrapper around a core.simd.float4, and have been trying to make the following code work, but have been met with no success.

auto add(float rhs)
{
    return __simd(XMM.ADDPS, lhs, rhs);
}

Then I tried

auto add(float4 lhs, float rhs)
{
    float4 tmp = [rhs, rhs, rhs, rhs];
    return __simd(XMM.ADDPS, lhs, rhs);
}

When that didn't work, I turned to IASM and threw together this:

float4 add(float4 lhs, float rhs)
{
    float4 res;
    float4 rhs_tmp = [rhs, rhs, rhs, rhs];
    auto lhs_addr = &lhs;
    auto rhs_addr = &rhs_tmp;
    asm
    {
        mov RAX, lhs_addr;
        mov RBX, rhs_addr;
        movups XMM0, [RAX];
        movups XMM1, [RBX];

        addps XMM0, XMM1;
        movups res, XMM0;
    }
    return res;
}

and it still didn't work. So, what am I doing wrong?

On Thursday, 21 April 2016 at 00:14:53 UTC, Straivers wrote:
> Hi,
>
> I want to make a utility wrapper around a core.simd.float4, and have been trying to make the following code work, but have been met with no success.
>
> [...]

you want to broadcast the rhs to a float4 and then adds them. Can you post the errors (if any) you get during compilation.

On Thursday, 21 April 2016 at 01:48:15 UTC, Nicholas Wilson wrote:
> On Thursday, 21 April 2016 at 00:14:53 UTC, Straivers wrote:
>> Hi,
>>
>> I want to make a utility wrapper around a core.simd.float4, and have been trying to make the following code work, but have been met with no success.
>>
>> [...]
>
> you want to broadcast the rhs to a float4 and then adds them. Can you post the errors (if any) you get during compilation.

Urgh, autocorrect. That should be addps them.

On Thursday, 21 April 2016 at 01:49:19 UTC, Nicholas Wilson wrote:
>>> [...]
>>
>> you want to broadcast the rhs to a float4 and then adds them. Can you post the errors (if any) you get during compilation.
>
> Urgh, autocorrect. That should be addps them.

I get a "Error: floating point constant expression expected instead of rhs"

Am Thu, 21 Apr 2016 00:14:53 +0000
schrieb Straivers <straivers98@gmail.com>:

> Hi,
> 
> I want to make a utility wrapper around a core.simd.float4, and have been trying to make the following code work, but have been met with no success.
> 
> auto add(float rhs)
> {
>      return __simd(XMM.ADDPS, lhs, rhs);
> }

It seems like your are duplicating std.simd: https://github.com/TurkeyMan/simd

-- 
Marco