X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fdrivers%2Fdri%2Fi965%2Fbrw_fs.cpp;h=0f9de30f05b578785e2d1c7abeb6ddd376e2b62b;hb=89e421369c54a8edc4930352e062f03b5c66b886;hp=bb22cfa5fab7c0da48965ff8f46f58a300b0c589;hpb=d67d84f5e568feaa988bdda6a23c84aa34b8bbaf;p=mesa.git

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index bb22cfa5fab..0f9de30f05b 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3524,6 +3524,36 @@ fs_visitor::lower_integer_multiplication()
    return progress;
 }
 
+bool
+fs_visitor::lower_minmax()
+{
+   assert(devinfo->gen < 6);
+
+   bool progress = false;
+
+   foreach_block_and_inst_safe(block, fs_inst, inst, cfg) {
+      const fs_builder ibld(this, block, inst);
+
+      if (inst->opcode == BRW_OPCODE_SEL &&
+          inst->predicate == BRW_PREDICATE_NONE) {
+         /* FIXME: Using CMP doesn't preserve the NaN propagation semantics of
+          *        the original SEL.L/GE instruction
+          */
+         ibld.CMP(ibld.null_reg_d(), inst->src[0], inst->src[1],
+                  inst->conditional_mod);
+         inst->predicate = BRW_PREDICATE_NORMAL;
+         inst->conditional_mod = BRW_CONDITIONAL_NONE;
+
+         progress = true;
+      }
+   }
+
+   if (progress)
+      invalidate_live_intervals();
+
+   return progress;
+}
+
 static void
 setup_color_payload(const fs_builder &bld, const brw_wm_prog_key *key,
                     fs_reg *dst, fs_reg color, unsigned components)
@@ -5134,7 +5164,7 @@ fs_visitor::optimize()
 
    if (unlikely(INTEL_DEBUG & DEBUG_OPTIMIZER)) {
       char filename[64];
-      snprintf(filename, 64, "%s%d-%s-00-start",
+      snprintf(filename, 64, "%s%d-%s-00-00-start",
                stage_abbrev, dispatch_width, nir->info.name);
 
       backend_shader::dump_instructions(filename);
@@ -5187,6 +5217,13 @@ fs_visitor::optimize()
    OPT(opt_combine_constants);
    OPT(lower_integer_multiplication);
 
+   if (devinfo->gen <= 5 && OPT(lower_minmax)) {
+      OPT(opt_cmod_propagation);
+      OPT(opt_cse);
+      OPT(opt_copy_propagate);
+      OPT(dead_code_eliminate);
+   }
+
    lower_uniform_pull_constant_loads();
 
    validate();
@@ -5606,8 +5643,8 @@ brw_compile_fs(const struct brw_compiler *compiler, void *log_data,
    nir_shader *shader = nir_shader_clone(mem_ctx, src_shader);
    shader = brw_nir_apply_sampler_key(shader, compiler->devinfo, &key->tex,
                                       true);
-   shader = brw_nir_lower_io(shader, compiler->devinfo, true,
-                             false, NULL);
+   brw_nir_lower_fs_inputs(shader);
+   brw_nir_lower_fs_outputs(shader);
    shader = brw_postprocess_nir(shader, compiler->devinfo, true);
 
    /* key->alpha_test_func means simulating alpha testing via discards,