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vkd3d-shader/tpf: Don't pass 0x4 as mask for vec4 constant src registers.

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Co-authored-by: Evan Tang <etang@codeweavers.com>

Evan Tang reported that new fixmes appeared on the shader_runner when
running some of his tests after
f50d0ae2cb.

    vkd3d:652593:fixme:shader_sm4_read_src_param Unhandled mask 0x4.

The change to blame seems to be this added line in
sm4_src_from_constant_value().

    +    src->swizzle = VKD3D_SHADER_NO_SWIZZLE;

On tpf binaries the last 12 bits of each src register in an instruction
specify the swizzle, and there are 5 possible combinations:

    Dimension NONE
    -------- 00

    Dimension SCALAR
    -------- 01

    Dimension VEC4, with a 4 bit writemask:
    ---- xxxx 00 01

    Dimension VEC4, with an 8 bit swizzle:
    xx xx xx xx 01 01

    Dimension VEC4, with a 2bit scalar dimension number:
    ------ xx 10 01

So far, we have only seen src registers use 4 bit writemasks in a
single case: for vec4 constants, and it is always zero.

So we expect this:

    ---- 0000 00 01

Now, I probably wanted to initialize src->swizzle to zero when writing
constants, but VKD3D_SHADER_NO_SWIZZLE is not zero, it is actually the
default swizzle:

    11 10 01 00

And the last 4 bits (0x4) get written in the mask part, which causes
the reader to complain.
This commit is contained in:
Francisco Casas
2023-11-01 20:50:33 -03:00
committed by Alexandre Julliard
parent 749df8dec2
commit 98b5eb474a
Notes: Alexandre Julliard 2023-11-06 23:18:22 +01:00 
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/438
1 changed files with 1 additions and 1 deletions
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2
libs/vkd3d-shader/tpf.c
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@ -3790,7 +3790,7 @@ static void sm4_dst_from_node(struct vkd3d_shader_dst_param *dst, const struct h
static void sm4_src_from_constant_value(struct vkd3d_shader_src_param *src,
const struct hlsl_constant_value *value, unsigned int width, unsigned int map_writemask)
{
src->swizzle = VKD3D_SHADER_NO_SWIZZLE;
src->swizzle = 0;
src->reg.type = VKD3DSPR_IMMCONST;
if (width == 1)
{