Re: [PATCH 0/5] MR53: vkd3d-shader/hlsl: transpose(), smoothstep(), and properly convert args of element-wise intrinsics.

[Francisco Casas (＠fcasas)]

For the record, the following shader:
```hlsl
uniform float A, B, X;

float4 main() : sv_target
{
    return smoothstep(A, B, X);
}
```

results in the following instructions in the native compiler:
```hlsl
// With
// A = cb0[0].x
// B = cb0[0].y
// X = cb0[0].z

// r0.x = B - A
// r0.y = X - A
add r0.xy, -cb0[0].xxxx, cb0[0].yzyy

// r0.x = 1 / r0.x
div r0.x, l(1.000000, 1.000000, 1.000000, 1.000000), r0.x

// r0.x = saturate(r0.x * r0.y)
mul_sat r0.x, r0.x, r0.y

// r0.y = 2 * r0.x - 3
mad r0.y, r0.x, l(-2.000000), l(3.000000)

// r0.x = r0.x * r0.x
mul r0.x, r0.x, r0.x

// result = r0.x * r0.y
mul o0.xyzw, r0.xxxx, r0.yyyy
```

which is what I try to replicate (we don't have `mul_sat` yet).