i965: Refactor fs_generator API

We split out SIMD8 and SIMD16 generation into seperate calls to
new method generate_code(), which returns the start offset for the
generated code.  A new get_assembly() method returns the generated code.

This avoids asserting MESA_SHADER_FRAGMENT and accessing wm_prog_data
in the generator.

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

4 files changed, 23 insertions, 39 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp
index 3afe0e71519..7802c9f5021 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp
@@ -45,7 +45,9 @@ const unsigned *
 brw_blorp_eu_emitter::get_program(unsigned *program_size)
 {
    cfg_t cfg(&insts);
-   return generator.generate_assembly(NULL, &cfg, program_size);
+   generator.generate_code(&cfg, 16);
+
+   return generator.get_assembly(program_size);
 }
 
 /**
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 39c6231b5c1..1289a400f36 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3729,11 +3729,12 @@ brw_wm_fs_emit(struct brw_context *brw,
       prog_data->no_8 = false;
    }
 
-   const unsigned *assembly = NULL;
    fs_generator g(brw, mem_ctx, key, prog_data, prog, fp,
                   v.runtime_check_aads_emit, INTEL_DEBUG & DEBUG_WM);
-   assembly = g.generate_assembly(simd8_cfg, simd16_cfg,
-                                  final_assembly_size);
+   if (simd8_cfg)
+      g.generate_code(simd8_cfg, 8);
+   if (simd16_cfg)
+      prog_data->prog_offset_16 = g.generate_code(simd16_cfg, 16);
 
    if (unlikely(brw->perf_debug) && shader) {
       if (shader->compiled_once)
@@ -3746,7 +3747,7 @@ brw_wm_fs_emit(struct brw_context *brw,
       }
    }
 
-   return assembly;
+   return g.get_assembly(final_assembly_size);
 }
 
 bool
diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index d9150c31053..8a8b72158bd 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -697,12 +697,10 @@ public:
                 bool debug_flag);
    ~fs_generator();
 
-   const unsigned *generate_assembly(const cfg_t *simd8_cfg,
-                                     const cfg_t *simd16_cfg,
-                                     unsigned *assembly_size);
+   int generate_code(const cfg_t *cfg, int dispatch_width);
+   const unsigned *get_assembly(unsigned int *assembly_size);
 
 private:
-   void generate_code(const cfg_t *cfg);
    void fire_fb_write(fs_inst *inst,
                       struct brw_reg payload,
                       struct brw_reg implied_header,
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index c95beb6bc06..0622b0740c9 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -1512,9 +1512,17 @@ fs_generator::generate_untyped_surface_read(fs_inst *inst, struct brw_reg dst,
    brw_mark_surface_used(prog_data, surf_index.dw1.ud);
 }
 
-void
-fs_generator::generate_code(const cfg_t *cfg)
+int
+fs_generator::generate_code(const cfg_t *cfg, int dispatch_width)
 {
+   /* align to 64 byte boundary. */
+   while (p->next_insn_offset % 64)
+      brw_NOP(p);
+
+   this->dispatch_width = dispatch_width;
+   if (dispatch_width == 16)
+      brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED);
+
    int start_offset = p->next_insn_offset;
    int loop_count = 0;
 
@@ -2024,37 +2032,12 @@ fs_generator::generate_code(const cfg_t *cfg)
       dump_assembly(p->store, annotation.ann_count, annotation.ann, brw, prog);
       ralloc_free(annotation.ann);
    }
+
+   return start_offset;
 }
 
 const unsigned *
-fs_generator::generate_assembly(const cfg_t *simd8_cfg,
-                                const cfg_t *simd16_cfg,
-                                unsigned *assembly_size)
+fs_generator::get_assembly(unsigned int *assembly_size)
 {
-   assert(simd8_cfg || simd16_cfg);
-
-   if (simd8_cfg) {
-      dispatch_width = 8;
-      generate_code(simd8_cfg);
-   }
-
-   if (simd16_cfg) {
-      /* align to 64 byte boundary. */
-      while (p->next_insn_offset % 64) {
-         brw_NOP(p);
-      }
-
-      assert(stage == MESA_SHADER_FRAGMENT);
-      brw_wm_prog_data *prog_data = (brw_wm_prog_data*) this->prog_data;
-
-      /* Save off the start of this SIMD16 program */
-      prog_data->prog_offset_16 = p->next_insn_offset;
-
-      brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED);
-
-      dispatch_width = 16;
-      generate_code(simd16_cfg);
-   }
-
    return brw_get_program(p, assembly_size);
 }