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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_sample.c7
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_sample.h1
2 files changed, 7 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
index acd99741f13..2227a062d08 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
@@ -132,6 +132,10 @@ lp_sampler_static_state(struct lp_sampler_static_state *state,
state->min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
}
+ if (sampler->lod_bias != 0.0) {
+ state->lod_bias_non_zero = 1;
+ }
+
/* If min_lod == max_lod we can greatly simplify mipmap selection.
* This is a case that occurs during automatic mipmap generation.
*/
@@ -258,7 +262,8 @@ lp_build_lod_selector(struct lp_build_sample_context *bld,
}
/* add sampler lod bias */
- lod = LLVMBuildFAdd(bld->builder, lod, sampler_lod_bias, "sampler_lod_bias");
+ if (bld->static_state->lod_bias_non_zero)
+ lod = LLVMBuildFAdd(bld->builder, lod, sampler_lod_bias, "sampler_lod_bias");
/* clamp lod */
lod = lp_build_clamp(float_bld, lod, min_lod, max_lod);
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.h b/src/gallium/auxiliary/gallivm/lp_bld_sample.h
index 4d2eeaa5eb4..bb1c8c8dcee 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.h
@@ -83,6 +83,7 @@ struct lp_sampler_static_state
unsigned compare_func:3;
unsigned normalized_coords:1;
unsigned min_max_lod_equal:1; /**< min_lod == max_lod ? */
+ unsigned lod_bias_non_zero:1;
};