Home | History | Annotate | Download | only in compiler 
      1 /*
      2  * Copyright  2006 - 2017 Intel Corporation
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     21  * IN THE SOFTWARE.
     22  */
     23 
     24 #include "brw_clip.h"
     25 
     26 #include "common/gen_debug.h"
     27 
     28 const unsigned *
     29 brw_compile_clip(const struct brw_compiler *compiler,
     30                  void *mem_ctx,
     31                  const struct brw_clip_prog_key *key,
     32                  struct brw_clip_prog_data *prog_data,
     33                  struct brw_vue_map *vue_map,
     34                  unsigned *final_assembly_size)
     35 {
     36    struct brw_clip_compile c;
     37    memset(&c, 0, sizeof(c));
     38 
     39    /* Begin the compilation:
     40     */
     41    brw_init_codegen(compiler->devinfo, &c.func, mem_ctx);
     42 
     43    c.func.single_program_flow = 1;
     44 
     45    c.key = *key;
     46    c.vue_map = *vue_map;
     47 
     48    /* nr_regs is the number of registers filled by reading data from the VUE.
     49     * This program accesses the entire VUE, so nr_regs needs to be the size of
     50     * the VUE (measured in pairs, since two slots are stored in each
     51     * register).
     52     */
     53    c.nr_regs = (c.vue_map.num_slots + 1)/2;
     54 
     55    c.prog_data.clip_mode = c.key.clip_mode; /* XXX */
     56 
     57    /* For some reason the thread is spawned with only 4 channels
     58     * unmasked.
     59     */
     60    brw_set_default_mask_control(&c.func, BRW_MASK_DISABLE);
     61 
     62    /* Would ideally have the option of producing a program which could
     63     * do all three:
     64     */
     65    switch (key->primitive) {
     66    case GL_TRIANGLES:
     67       if (key->do_unfilled)
     68 	 brw_emit_unfilled_clip( &c );
     69       else
     70 	 brw_emit_tri_clip( &c );
     71       break;
     72    case GL_LINES:
     73       brw_emit_line_clip( &c );
     74       break;
     75    case GL_POINTS:
     76       brw_emit_point_clip( &c );
     77       break;
     78    default:
     79       unreachable("not reached");
     80    }
     81 
     82    brw_compact_instructions(&c.func, 0, NULL);
     83 
     84    *prog_data = c.prog_data;
     85 
     86    const unsigned *program = brw_get_program(&c.func, final_assembly_size);
     87 
     88    if (unlikely(INTEL_DEBUG & DEBUG_CLIP)) {
     89       fprintf(stderr, "clip:\n");
     90       brw_disassemble(compiler->devinfo,
     91                       program, 0, *final_assembly_size, stderr);
     92       fprintf(stderr, "\n");
     93    }
     94 
     95    return program;
     96 }
     97