diff options
| -rw-r--r-- | src/gallium/drivers/panfrost/midgard/midgard_compile.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/gallium/drivers/panfrost/midgard/midgard_compile.c b/src/gallium/drivers/panfrost/midgard/midgard_compile.c index 09b11c2ddee..323879aea77 100644 --- a/src/gallium/drivers/panfrost/midgard/midgard_compile.c +++ b/src/gallium/drivers/panfrost/midgard/midgard_compile.c @@ -36,6 +36,7 @@ #include "main/imports.h" #include "compiler/nir/nir_builder.h" #include "util/half_float.h" +#include "util/u_math.h" #include "util/u_debug.h" #include "util/u_dynarray.h" #include "util/list.h" @@ -1451,6 +1452,39 @@ midgard_tex_format(enum glsl_sampler_dim dim) } } +/* Tries to attach an explicit LOD / bias as a constant. Returns whether this + * was successful */ + +static bool +pan_attach_constant_bias( + compiler_context *ctx, + nir_src lod, + midgard_texture_word *word) +{ + /* To attach as constant, it has to *be* constant */ + + if (!nir_src_is_const(lod)) + return false; + + float f = nir_src_as_float(lod); + + /* Break into fixed-point */ + signed lod_int = f; + float lod_frac = f - lod_int; + + /* Carry over negative fractions */ + if (lod_frac < 0.0) { + lod_int--; + lod_frac += 1.0; + } + + /* Encode */ + word->bias = float_to_ubyte(lod_frac); + word->bias_int = lod_int; + + return true; +} + static void emit_texop_native(compiler_context *ctx, nir_tex_instr *instr, unsigned midgard_texop) |