From d4eb2f9cda1fa08949f8e28ef414bbb41e150459 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Mathias=20Fr=C3=B6hlich?= Date: Sun, 22 May 2016 14:10:19 +0200 Subject: [PATCH] mesa: Use bitmask/ffs to build ff fragment shader keys. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Replaces an iterate and test bit in a bitmask loop by a loop only iterating over the bits set in the bitmask. The bitmask used here for iteration is a combination of different enabled masks present for texture units. v2: Use _mesa_bit_scan{,64} instead of open coding. v3: Use u_bit_scan{,64} instead of _mesa_bit_scan{,64}. Reviewed-by: Brian Paul Signed-off-by: Mathias Fröhlich --- src/mesa/main/ff_fragment_shader.cpp | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp index 4977225..d0def7c 100644 --- a/src/mesa/main/ff_fragment_shader.cpp +++ b/src/mesa/main/ff_fragment_shader.cpp @@ -49,6 +49,7 @@ #include "program/prog_parameter.h" #include "program/prog_print.h" #include "program/prog_statevars.h" +#include "util/bitscan.h" using namespace ir_builder; @@ -398,22 +399,25 @@ static GLbitfield get_fp_input_mask( struct gl_context *ctx ) */ static GLuint make_state_key( struct gl_context *ctx, struct state_key *key ) { - GLuint i, j; + GLuint j; GLbitfield inputs_referenced = VARYING_BIT_COL0; const GLbitfield inputs_available = get_fp_input_mask( ctx ); + GLbitfield mask; GLuint keySize; memset(key, 0, sizeof(*key)); /* _NEW_TEXTURE */ - for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { + mask = ctx->Texture._EnabledCoordUnits; + while (mask) { + const int i = u_bit_scan(&mask); const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i]; const struct gl_texture_object *texObj = texUnit->_Current; const struct gl_tex_env_combine_state *comb = texUnit->_CurrentCombine; const struct gl_sampler_object *samp; GLenum format; - if (!texUnit->_Current || !texUnit->Enabled) + if (!texObj) continue; samp = _mesa_get_samplerobj(ctx, i); -- 2.7.4