draw,gallivm: Fix draw_get_shader_param.

- Use LLVM limits when LLVM is being used, instead of TGSI limits
- Provide draw_get_shader_param_no_llvm for when llvm is never used (softpipe)
- Eliminate several of the hacks around draw shader caps in several drivers

Unfortunately the hack for PIPE_MAX_VERTEX_SAMPLERS is still necessary.

Reviewed-by: Marek Olšák <maraeo@gmail.com>

1 files changed, 57 insertions, 1 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_limits.h b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
index 2dbb7ce..905070e 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_limits.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
@@ -1,6 +1,6 @@
 /**************************************************************************
  *
- * Copyright 2010 VMware, Inc.
+ * Copyright 2010-2012 VMware, Inc.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -29,6 +29,13 @@
 #ifndef LP_BLD_LIMITS_H_
 #define LP_BLD_LIMITS_H_
 
+
+#include <limits.h>
+
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+
 /*
  * TGSI translation limits.
  *
@@ -57,4 +64,53 @@
  */
 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
 
+
+/**
+ * Some of these limits are actually infinite (i.e., only limited by available
+ * memory), however advertising INT_MAX would cause some test problems to
+ * actually try to allocate the maximum and run out of memory and crash.  So
+ * stick with something reasonable here.
+ */
+static INLINE int
+gallivm_get_shader_param(enum pipe_shader_cap param)
+{
+   switch(param) {
+   case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
+   case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
+   case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
+   case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
+      return 1 * 1024 * 1024;
+   case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
+      return LP_MAX_TGSI_NESTING;
+   case PIPE_SHADER_CAP_MAX_INPUTS:
+      return PIPE_MAX_SHADER_INPUTS;
+   case PIPE_SHADER_CAP_MAX_CONSTS:
+      return 16 * 2024;
+   case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
+      return PIPE_MAX_CONSTANT_BUFFERS;
+   case PIPE_SHADER_CAP_MAX_TEMPS:
+      return LP_MAX_TGSI_TEMPS;
+   case PIPE_SHADER_CAP_MAX_ADDRS:
+      return LP_MAX_TGSI_ADDRS;
+   case PIPE_SHADER_CAP_MAX_PREDS:
+      return LP_MAX_TGSI_PREDS;
+   case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
+      return 1;
+   case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
+   case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
+   case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
+   case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
+      return 1;
+   case PIPE_SHADER_CAP_SUBROUTINES:
+      return 1;
+   case PIPE_SHADER_CAP_INTEGERS:
+      return 1;
+   case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
+      return PIPE_MAX_SAMPLERS;
+   default:
+      return 0;
+   }
+}
+
+
 #endif /* LP_BLD_LIMITS_H_ */