[PATCH 0/3] MR369: vkd3d-shader/d3d-asm: Minor disassembler fixes.

[Francisco Casas (＠fcasas)]

Some minor fixes so that we match better the native disassembler's output.

Explanations in the commit descriptions.

[PATCH 1/3] vkd3d-shader/d3d-asm: Use vkd3d_shader_register.dimension to know when to dump swizzle.

[Francisco Casas]

From: Francisco Casas

The assumption that sampler registers never have a swizzle is not
totally correct.

For instance, for the following shader:

Texture2D tex;
    sampler sam;

float4 main() : sv_target
    {
        return tex.GatherGreen(sam, float2(0, 0));
    }

the gather instruction is being disassembled as

gather4_indexable(texture2d) o0.xyzw, l(0.0, 0.0, 0.0, 0.0), t0.xyzw, s0

instead of

gather4_indexable(texture2d)(float,float,float,float) o0.xyzw, l(0.0, 0.0, 0.0, 0.0), t0.xyzw, s0.y

(notice the missing swizzle in the last parameter s0).

This is because the Gather instructions give the sampler register a vec4
dimension (and scalar swizzle type) to indicate the channel for the
gather operation.

The solution is using the new vkd3d_shader_register.dimension instead of
checking the swizzle type.
---
 libs/vkd3d-shader/d3d_asm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c
index 4582b22a7..7df2f1634 100644
--- a/libs/vkd3d-shader/d3d_asm.c
+++ b/libs/vkd3d-shader/d3d_asm.c
@@ -1330,7 +1330,7 @@ static void shader_dump_src_param(struct vkd3d_d3d_asm_compiler *compiler,
     }

if (param->reg.type != VKD3DSPR_IMMCONST && param->reg.type != VKD3DSPR_IMMCONST64
-            && param->reg.type != VKD3DSPR_SAMPLER)
+            && param->reg.dimension == VSIR_DIMENSION_VEC4)
     {
         unsigned int swizzle_x = vkd3d_swizzle_get_component(swizzle, 0);
         unsigned int swizzle_y = vkd3d_swizzle_get_component(swizzle, 1);

[PATCH 2/3] vkd3d-shader/d3d-asm: Use vkd3d_shader_register.dimension to know when to dump writemask.

[Francisco Casas]

From: Francisco Casas

This change ensures that we don't dump the writemask for registers that
have a scalar dimension.

For instance, for this shader:

float r;

float4 main(out float d : DEPTH) : sv_target
    {
        d = r;
        return 0;
    }

we now correctly dump

dcl_output oDepth

instead of

dcl_output oDepth.x
---
 libs/vkd3d-shader/d3d_asm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c
index 7df2f1634..62b50876a 100644
--- a/libs/vkd3d-shader/d3d_asm.c
+++ b/libs/vkd3d-shader/d3d_asm.c
@@ -1264,7 +1264,7 @@ static void shader_dump_dst_param(struct vkd3d_d3d_asm_compiler *compiler,

shader_dump_register(compiler, &param->reg, is_declaration);

-    if (write_mask)
+    if (write_mask && param->reg.dimension == VSIR_DIMENSION_VEC4)
     {
         static const char write_mask_chars[] = "xyzw";

[PATCH 3/3] vkd3d-shader/d3d-asm: Don't print offset for DEPTHOUT registers.

[Francisco Casas]

From: Francisco Casas

This register is unique and thus is not accompanied with an offset in
the native disassembler output.
---
 libs/vkd3d-shader/d3d_asm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c
index 62b50876a..6a3513a28 100644
--- a/libs/vkd3d-shader/d3d_asm.c
+++ b/libs/vkd3d-shader/d3d_asm.c
@@ -1164,7 +1164,8 @@ static void shader_dump_register(struct vkd3d_d3d_asm_compiler *compiler, const
     }
     else if (reg->type != VKD3DSPR_RASTOUT
             && reg->type != VKD3DSPR_MISCTYPE
-            && reg->type != VKD3DSPR_NULL)
+            && reg->type != VKD3DSPR_NULL
+            && reg->type != VKD3DSPR_DEPTHOUT)
     {
         if (offset != ~0u)
         {

[PATCH 0/3] MR369: vkd3d-shader/d3d-asm: Minor disassembler fixes. - approved

[Giovanni Mascellani (＠giomasce)]

This merge request was approved by Giovanni Mascellani.

[Henri Verbeet (＠hverbeet)]

>      if (param->reg.type != VKD3DSPR_IMMCONST && param->reg.type != VKD3DSPR_IMMCONST64
> -            && param->reg.type != VKD3DSPR_SAMPLER)
> +            && param->reg.dimension == VSIR_DIMENSION_VEC4)

Does that make the IMMCONST/IMMCONST64 checks redundant as well?

[Francisco Casas (＠fcasas)]

On Wed Sep 27 17:28:38 2023 +0000, Henri Verbeet wrote:
> >      if (param->reg.type != VKD3DSPR_IMMCONST && param->reg.type != VKD3DSPR_IMMCONST64
> > -            && param->reg.type != VKD3DSPR_SAMPLER)
> > +            && param->reg.dimension == VSIR_DIMENSION_VEC4)
>
> Does that make the IMMCONST/IMMCONST64 checks redundant as well?

VKD3DSPR_IMMCONST64~s have dimension VSIR_DIMENSION_VEC4 but their swizzles are not intended to be used nor shown. shader_dump_register() takes care of showing the immconst as an expression such as `l(1.0, 2.0, 3.0, 4.0)`.

On the other hand we could get rid of the check for the regular VKD3DSPR_IMMCONST~s since they have dimension VSIR_DIMENSION_SCALAR, but it feels right to keep it for documentation purposes, since their swizzles are also not intended to be used nor shown.

[PATCH 0/3] MR369: vkd3d-shader/d3d-asm: Minor disassembler fixes. - approved

[Henri Verbeet (＠hverbeet)]

This merge request was approved by Henri Verbeet.