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asahi: defer fixed->float to tess

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this should parallelize better.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31908>
This commit is contained in:
Alyssa Rosenzweig 2024-10-13 17:41:32 -04:00
parent 3f6ff1b11e
commit ea18348d94
3 changed files with 8 additions and 12 deletions
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5
src/asahi/lib/shaders/tessellation.cl
View file

@ -96,7 +96,10 @@ libagx_load_tess_coord(constant struct libagx_tess_args *p, uint raw_id)
&p->patch_coord_buffer[p->coord_allocs[patch] + vtx];
/* Written weirdly because NIR struggles with loads of structs */
return *((global float2 *)t);
uint2 fixed = *((global uint2 *)t);
/* Convert fixed point to float */
return convert_float2(fixed) / (1u << 16);
}
uintptr_t

11
src/asahi/lib/shaders/tessellator.cl
View file

@ -353,13 +353,6 @@ floatToFixed(const float input)
return mad(input, FXP_ONE, 0.5f);
}
static float
fixedToFloat(const FXP input)
{
// Don't need to worry about special cases because the bounds are reasonable.
return ((float)input) / FXP_ONE;
}
static bool
isOdd(const float input)
{
@ -414,8 +407,8 @@ PatchIndexValue(private struct CHWTessellator *ctx, int index)
static void
DefinePoint(global struct libagx_tess_point *out, FXP fxpU, FXP fxpV)
{
out->u = fixedToFloat(fxpU);
out->v = fixedToFloat(fxpV);
out->u = fxpU;
out->v = fxpV;
}
static void

4
src/asahi/lib/shaders/tessellator.h
View file

@ -31,8 +31,8 @@ enum libagx_tess_mode {
};
struct libagx_tess_point {
float u;
float v;
uint32_t u;
uint32_t v;
};
AGX_STATIC_ASSERT(sizeof(struct libagx_tess_point) == 8);