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amd,util: fix how lod bias is converted to fixed-point

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according to internal docs

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20967>
This commit is contained in:
Marek Olšák 2023-01-31 00:52:59 -05:00
parent fb5d31c3dd
commit e673bb4ae4
3 changed files with 10 additions and 8 deletions
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5
src/amd/vulkan/radv_device.c
View file

@ -7675,17 +7675,18 @@ radv_init_sampler(struct radv_device *device, struct radv_sampler *sampler,
sampler->state[1] = (S_008F34_MIN_LOD(radv_float_to_ufixed(CLAMP(pCreateInfo->minLod, 0, 15), 8)) |
S_008F34_MAX_LOD(radv_float_to_ufixed(CLAMP(pCreateInfo->maxLod, 0, 15), 8)) |
S_008F34_PERF_MIP(max_aniso_ratio ? max_aniso_ratio + 6 : 0));
sampler->state[2] = (S_008F38_LOD_BIAS(radv_float_to_sfixed(CLAMP(pCreateInfo->mipLodBias, -16, 16), 8)) |
S_008F38_XY_MAG_FILTER(radv_tex_filter(pCreateInfo->magFilter, max_aniso)) |
sampler->state[2] = (S_008F38_XY_MAG_FILTER(radv_tex_filter(pCreateInfo->magFilter, max_aniso)) |
S_008F38_XY_MIN_FILTER(radv_tex_filter(pCreateInfo->minFilter, max_aniso)) |
S_008F38_MIP_FILTER(radv_tex_mipfilter(pCreateInfo->mipmapMode)));
sampler->state[3] = S_008F3C_BORDER_COLOR_TYPE(radv_tex_bordercolor(border_color));
if (device->physical_device->rad_info.gfx_level >= GFX10) {
sampler->state[2] |=
S_008F38_LOD_BIAS(radv_float_to_sfixed(CLAMP(pCreateInfo->mipLodBias, -32, 31), 8)) |
S_008F38_ANISO_OVERRIDE_GFX10(device->instance->disable_aniso_single_level);
} else {
sampler->state[2] |=
S_008F38_LOD_BIAS(radv_float_to_sfixed(CLAMP(pCreateInfo->mipLodBias, -16, 15), 8)) |
S_008F38_DISABLE_LSB_CEIL(device->physical_device->rad_info.gfx_level <= GFX8) |
S_008F38_FILTER_PREC_FIX(1) |
S_008F38_ANISO_OVERRIDE_GFX8(device->instance->disable_aniso_single_level &&

11
src/gallium/drivers/radeonsi/si_state.c
View file

@ -4816,18 +4816,19 @@ static void *si_create_sampler_state(struct pipe_context *ctx,
rstate->val[1] = (S_008F34_MIN_LOD(S_FIXED(CLAMP(state->min_lod, 0, 15), 8)) |
S_008F34_MAX_LOD(S_FIXED(CLAMP(state->max_lod, 0, 15), 8)) |
S_008F34_PERF_MIP(max_aniso_ratio ? max_aniso_ratio + 6 : 0));
rstate->val[2] = (S_008F38_LOD_BIAS(S_FIXED(CLAMP(state->lod_bias, -16, 16), 8)) |
S_008F38_XY_MAG_FILTER(si_tex_filter(state->mag_img_filter, max_aniso)) |
rstate->val[2] = (S_008F38_XY_MAG_FILTER(si_tex_filter(state->mag_img_filter, max_aniso)) |
S_008F38_XY_MIN_FILTER(si_tex_filter(state->min_img_filter, max_aniso)) |
S_008F38_MIP_FILTER(si_tex_mipfilter(state->min_mip_filter)));
rstate->val[3] = si_translate_border_color(sctx, state, &state->border_color,
state->border_color_is_integer);
if (sscreen->info.gfx_level >= GFX10) {
rstate->val[2] |= S_008F38_ANISO_OVERRIDE_GFX10(1);
rstate->val[2] |= S_008F38_LOD_BIAS(S_FIXED(CLAMP(state->lod_bias, -32, 31), 8)) |
S_008F38_ANISO_OVERRIDE_GFX10(1);
} else {
rstate->val[0] |= S_008F30_COMPAT_MODE(sctx->gfx_level >= GFX8);
rstate->val[2] |= S_008F38_DISABLE_LSB_CEIL(sctx->gfx_level <= GFX8) |
rstate->val[2] |= S_008F30_COMPAT_MODE(sctx->gfx_level >= GFX8) |
S_008F38_LOD_BIAS(S_FIXED(CLAMP(state->lod_bias, -16, 15), 8)) |
S_008F38_DISABLE_LSB_CEIL(sctx->gfx_level <= GFX8) |
S_008F38_FILTER_PREC_FIX(1) |
S_008F38_ANISO_OVERRIDE_GFX8(sctx->gfx_level >= GFX8);
}

2
src/util/u_math.h
View file

@ -792,7 +792,7 @@ bool util_invert_mat4x4(float *out, const float *m);
static inline float
util_quantize_lod_bias(float lod)
{
lod = CLAMP(lod, -16, 16);
lod = CLAMP(lod, -32, 31);
return roundf(lod * 256) / 256;
}