i965/fs: Move brw_wm_lookup_iz() to fs_visitor::setup_payload_gen4().

This necessitates compiling brw_wm_iz.c as C++.

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

1 files changed, 167 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_iz.cpp b/src/mesa/drivers/dri/i965/brw_wm_iz.cpp
new file mode 100644
index 0000000..43cd74c
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_wm_iz.cpp
@@ -0,0 +1,167 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice (including the
+ next paragraph) shall be included in all copies or substantial
+ portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ **********************************************************************/
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  */
+
+
+#include "main/mtypes.h"
+#include "brw_fs.h"
+
+
+#undef P                        /* prompted depth */
+#undef C                        /* computed */
+#undef N                        /* non-promoted? */
+
+#define P 0
+#define C 1
+#define N 2
+
+static const struct {
+   GLuint mode:2;
+   GLuint sd_present:1;
+   GLuint sd_to_rt:1;
+   GLuint dd_present:1;
+   GLuint ds_present:1;
+} wm_iz_table[IZ_BIT_MAX] =
+{
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 0 },
+ { N, 0, 1, 0, 0 },
+ { N, 0, 1, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { C, 0, 1, 1, 0 },
+ { C, 0, 1, 1, 0 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 0 },
+ { C, 0, 1, 1, 0 },
+ { C, 0, 1, 1, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 0 },
+ { N, 0, 1, 0, 0 },
+ { N, 0, 1, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { C, 0, 1, 1, 0 },
+ { C, 0, 1, 1, 0 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 0 },
+ { C, 0, 1, 1, 0 },
+ { C, 0, 1, 1, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 1 },
+ { N, 0, 1, 0, 1 },
+ { N, 0, 1, 0, 1 },
+ { P, 0, 0, 0, 0 },
+ { P, 0, 0, 0, 0 },
+ { C, 0, 1, 1, 1 },
+ { C, 0, 1, 1, 1 },
+ { P, 0, 0, 0, 0 },
+ { N, 1, 1, 0, 1 },
+ { C, 0, 1, 1, 1 },
+ { C, 0, 1, 1, 1 },
+ { P, 0, 0, 0, 0 },
+ { C, 0, 0, 0, 1 },
+ { P, 0, 0, 0, 0 },
+ { C, 0, 1, 0, 1 },
+ { P, 0, 0, 0, 0 },
+ { C, 1, 1, 0, 1 },
+ { C, 0, 1, 0, 1 },
+ { C, 0, 1, 0, 1 },
+ { P, 0, 0, 0, 0 },
+ { C, 1, 1, 1, 1 },
+ { C, 0, 1, 1, 1 },
+ { C, 0, 1, 1, 1 },
+ { P, 0, 0, 0, 0 },
+ { C, 1, 1, 1, 1 },
+ { C, 0, 1, 1, 1 },
+ { C, 0, 1, 1, 1 }
+};
+
+/**
+ * \param line_aa  AA_NEVER, AA_ALWAYS or AA_SOMETIMES
+ * \param lookup  bitmask of IZ_* flags
+ */
+void fs_visitor::setup_payload_gen4()
+{
+   GLuint reg = 2;
+   bool kill_stats_promoted_workaround = false;
+   int lookup = c->key.iz_lookup;
+   bool uses_depth =
+      (c->fp->program.Base.InputsRead & (1 << FRAG_ATTRIB_WPOS)) != 0;
+
+   assert(lookup < IZ_BIT_MAX);
+
+   /* Crazy workaround in the windowizer, which we need to track in
+    * our register allocation and render target writes.  See the "If
+    * statistics are enabled..." paragraph of 11.5.3.2: Early Depth
+    * Test Cases [Pre-DevGT] of the 3D Pipeline - Windower B-Spec.
+    */
+   if (c->key.stats_wm &&
+       (lookup & IZ_PS_KILL_ALPHATEST_BIT) &&
+       wm_iz_table[lookup].mode == P) {
+      kill_stats_promoted_workaround = true;
+   }
+
+   if (wm_iz_table[lookup].sd_present || uses_depth ||
+       kill_stats_promoted_workaround) {
+      c->source_depth_reg = reg;
+      reg += 2;
+   }
+
+   if (wm_iz_table[lookup].sd_to_rt || kill_stats_promoted_workaround)
+      c->source_depth_to_render_target = 1;
+
+   if (wm_iz_table[lookup].ds_present || c->key.line_aa != AA_NEVER) {
+      c->aa_dest_stencil_reg = reg;
+      c->runtime_check_aads_emit = (!wm_iz_table[lookup].ds_present &&
+                                    c->key.line_aa == AA_SOMETIMES);
+      reg++;
+   }
+
+   if (wm_iz_table[lookup].dd_present) {
+      c->dest_depth_reg = reg;
+      reg+=2;
+   }
+
+   c->nr_payload_regs = reg;
+}
+