Mesa (master): softpipe: Adverstise (tgsi_exec's) shader limits.

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: 7b5931b313b8a38fd564435e69e644320fb3de5e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7b5931b313b8a38fd564435e69e644320fb3de5e

Author: José Fonseca <jfonseca at vmware.com>
Date:   Wed May 12 14:10:10 2010 +0100

softpipe: Adverstise (tgsi_exec's) shader limits.

---

 src/gallium/auxiliary/tgsi/tgsi_exec.h   |    9 ++++---
 src/gallium/drivers/softpipe/sp_screen.c |   31 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index 83fc88e..3caf820 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -174,10 +174,11 @@ struct tgsi_sampler
 
 
 
-#define TGSI_EXEC_MAX_COND_NESTING  32
-#define TGSI_EXEC_MAX_LOOP_NESTING  32
-#define TGSI_EXEC_MAX_SWITCH_NESTING 32
-#define TGSI_EXEC_MAX_CALL_NESTING  32
+#define TGSI_EXEC_MAX_NESTING  32
+#define TGSI_EXEC_MAX_COND_NESTING  TGSI_EXEC_MAX_NESTING
+#define TGSI_EXEC_MAX_LOOP_NESTING  TGSI_EXEC_MAX_NESTING
+#define TGSI_EXEC_MAX_SWITCH_NESTING TGSI_EXEC_MAX_NESTING
+#define TGSI_EXEC_MAX_CALL_NESTING  TGSI_EXEC_MAX_NESTING
 
 /* The maximum number of input attributes per vertex. For 2D
  * input register files, this is the stride between two 1D
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 88e5c11..f874c3e 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -33,6 +33,7 @@
 #include "pipe/p_screen.h"
 
 #include "state_tracker/sw_winsys.h"
+#include "tgsi/tgsi_exec.h"
 
 #include "sp_texture.h"
 #include "sp_screen.h"
@@ -110,6 +111,36 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
       return 1;
+
+   case PIPE_CAP_MAX_VS_INSTRUCTIONS:
+   case PIPE_CAP_MAX_FS_INSTRUCTIONS:
+   case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
+   case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
+   case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
+   case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
+   case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
+   case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
+      /* There is no limit in number of instructions beyond available memory */
+      return 32768;
+   case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
+   case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
+      return TGSI_EXEC_MAX_NESTING;
+   case PIPE_CAP_MAX_VS_INPUTS:
+   case PIPE_CAP_MAX_FS_INPUTS:
+      return TGSI_EXEC_MAX_INPUT_ATTRIBS;
+   case PIPE_CAP_MAX_FS_CONSTS:
+   case PIPE_CAP_MAX_VS_CONSTS:
+      return TGSI_EXEC_MAX_CONST_BUFFER;
+   case PIPE_CAP_MAX_VS_TEMPS:
+   case PIPE_CAP_MAX_FS_TEMPS:
+      return TGSI_EXEC_NUM_TEMPS;
+   case PIPE_CAP_MAX_VS_ADDRS:
+   case PIPE_CAP_MAX_FS_ADDRS:
+      return TGSI_EXEC_NUM_ADDRS;
+   case PIPE_CAP_MAX_VS_PREDS:
+   case PIPE_CAP_MAX_FS_PREDS:
+      return TGSI_EXEC_NUM_PREDS;
+
    default:
       return 0;
    }