From 909c703bfbf7404414befaa0a94b76d78ba3cb4c Mon Sep 17 00:00:00 2001
From: Michel Dänzer <michel@tungstengraphics.com>
Date: Thu, 7 Feb 2008 19:44:42 +0000
Subject: tgsi: Fall back to interpreter instead of assert(0) on unimplemented
 SSE code.

---
 src/mesa/pipe/draw/draw_vertex_shader.c | 22 ++++++++++++++++------
 src/mesa/pipe/tgsi/exec/tgsi_sse2.c     |  3 +--
 src/mesa/x86/rtasm/x86sse.c             |  1 +
 3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/mesa/pipe/draw/draw_vertex_shader.c b/src/mesa/pipe/draw/draw_vertex_shader.c
index e6590eafcc..5ca93aa615 100644
--- a/src/mesa/pipe/draw/draw_vertex_shader.c
+++ b/src/mesa/pipe/draw/draw_vertex_shader.c
@@ -121,11 +121,16 @@ run_vertex_program(struct draw_context *draw,
          = (struct draw_vertex_shader *)draw->vertex_shader;
       codegen_function func
          = (codegen_function) x86_get_func( &shader->sse2_program );
-      func(
-         machine->Inputs,
-         machine->Outputs,
-         machine->Consts,
-         machine->Temps );
+
+      if (func)
+         func(
+            machine->Inputs,
+            machine->Outputs,
+            machine->Consts,
+            machine->Temps );
+      else
+         /* interpreter */
+         tgsi_exec_machine_run( machine );
    }
    else
 #endif
@@ -269,7 +274,12 @@ draw_create_vertex_shader(struct draw_context *draw,
       struct pipe_shader_state *sh = (struct pipe_shader_state *) shader;
 
       x86_init_func( &vs->sse2_program );
-      tgsi_emit_sse2( (struct tgsi_token *) sh->tokens, &vs->sse2_program );
+      if (!tgsi_emit_sse2( (struct tgsi_token *) sh->tokens,
+                           &vs->sse2_program )) {
+         x86_release_func( (struct x86_function *) &vs->sse2_program );
+	 fprintf(stdout /*err*/,
+		 "tgsi_emit_sse2() failed, falling back to interpreter\n");
+      }
    }
 #endif
 
diff --git a/src/mesa/pipe/tgsi/exec/tgsi_sse2.c b/src/mesa/pipe/tgsi/exec/tgsi_sse2.c
index f2180082f1..40bacf8552 100755
--- a/src/mesa/pipe/tgsi/exec/tgsi_sse2.c
+++ b/src/mesa/pipe/tgsi/exec/tgsi_sse2.c
@@ -2254,8 +2254,7 @@ tgsi_emit_sse2(
 
       case TGSI_TOKEN_TYPE_IMMEDIATE:
          /* XXX implement this */
-         assert(0);
-         break;
+         return 0;
 
       default:
          assert( 0 );
diff --git a/src/mesa/x86/rtasm/x86sse.c b/src/mesa/x86/rtasm/x86sse.c
index 56c211eee0..f8da6e405f 100644
--- a/src/mesa/x86/rtasm/x86sse.c
+++ b/src/mesa/x86/rtasm/x86sse.c
@@ -1137,6 +1137,7 @@ void x86_init_func_size( struct x86_function *p, unsigned code_size )
 void x86_release_func( struct x86_function *p )
 {
    _mesa_exec_free(p->store);
+   p->store = NULL;
 }
 
 
-- 
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