svga: Add svga driver

1 files changed, 266 insertions, 0 deletions

diff --git a/src/gallium/drivers/svga/svga_tgsi.c b/src/gallium/drivers/svga/svga_tgsi.c
new file mode 100644
index 00000000000..44d0930bc0a
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_tgsi.c
@@ -0,0 +1,266 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc.  All rights reserved.
+ *
+ * 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 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 AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ **********************************************************/
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_defines.h"
+#include "tgsi/tgsi_parse.h"
+#include "tgsi/tgsi_dump.h"
+#include "tgsi/tgsi_scan.h"
+#include "util/u_memory.h"
+
+#include "svgadump/st_shader_dump.h"
+
+#include "svga_context.h"
+#include "svga_tgsi.h"
+#include "svga_tgsi_emit.h"
+#include "svga_debug.h"
+
+#include "svga_hw_reg.h"
+#include "svga3d_shaderdefs.h"
+
+
+/* Sinkhole used only in error conditions.
+ */
+static char err_buf[128];
+
+#if 0
+static void svga_destroy_shader_emitter( struct svga_shader_emitter *emit )
+{
+   if (emit->buf != err_buf)
+      FREE(emit->buf);
+}
+#endif
+
+
+static boolean svga_shader_expand( struct svga_shader_emitter *emit )
+{
+   char *new_buf;
+   unsigned newsize = emit->size * 2;
+
+   if(emit->buf != err_buf)
+      new_buf = REALLOC(emit->buf, emit->size, newsize);
+   else
+      new_buf = NULL;
+
+   if (new_buf == NULL) {
+      emit->ptr = err_buf;
+      emit->buf = err_buf;
+      emit->size = sizeof(err_buf);
+      return FALSE;
+   }
+
+   emit->size = newsize;
+   emit->ptr = new_buf + (emit->ptr - emit->buf);
+   emit->buf = new_buf;
+   return TRUE;
+}   
+
+static INLINE boolean reserve(  struct svga_shader_emitter *emit,
+                                unsigned nr_dwords )
+{
+   if (emit->ptr - emit->buf + nr_dwords * sizeof(unsigned) >= emit->size) {
+      if (!svga_shader_expand( emit ))
+         return FALSE;
+   }
+
+   return TRUE;
+}
+
+boolean svga_shader_emit_dword( struct svga_shader_emitter *emit,
+                                unsigned dword )
+{
+   if (!reserve(emit, 1))
+      return FALSE;
+
+   *(unsigned *)emit->ptr = dword;
+   emit->ptr += sizeof dword;
+   return TRUE;
+}
+
+boolean svga_shader_emit_dwords( struct svga_shader_emitter *emit,
+                                 const unsigned *dwords,
+                                 unsigned nr )
+{
+   if (!reserve(emit, nr))
+      return FALSE;
+
+   memcpy( emit->ptr, dwords, nr * sizeof *dwords );
+   emit->ptr += nr * sizeof *dwords;
+   return TRUE;
+}
+
+boolean svga_shader_emit_opcode( struct svga_shader_emitter *emit,
+                                 unsigned opcode )
+{
+   SVGA3dShaderInstToken *here;
+
+   if (!reserve(emit, 1))
+      return FALSE;
+
+   here = (SVGA3dShaderInstToken *)emit->ptr;
+   here->value = opcode;
+
+   if (emit->insn_offset) {
+      SVGA3dShaderInstToken *prev = (SVGA3dShaderInstToken *)(emit->buf + 
+                                                              emit->insn_offset);
+      prev->size = (here - prev) - 1;
+   }
+   
+   emit->insn_offset = emit->ptr - emit->buf;
+   emit->ptr += sizeof(unsigned);
+   return TRUE;
+}
+
+#define SVGA3D_PS_2X (SVGA3D_PS_20 | 1)
+#define SVGA3D_VS_2X (SVGA3D_VS_20 | 1)
+
+static boolean svga_shader_emit_header( struct svga_shader_emitter *emit )
+{
+   SVGA3dShaderVersion header;
+
+   memset( &header, 0, sizeof header );
+
+   switch (emit->unit) {
+   case PIPE_SHADER_FRAGMENT:
+      header.value = emit->use_sm30 ? SVGA3D_PS_30 : SVGA3D_PS_2X;
+      break;
+   case PIPE_SHADER_VERTEX:
+      header.value = emit->use_sm30 ? SVGA3D_VS_30 : SVGA3D_VS_2X;
+      break;
+   }
+ 
+   return svga_shader_emit_dword( emit, header.value );
+}
+
+
+
+
+
+/* Parse TGSI shader and translate to SVGA/DX9 serialized
+ * representation.  
+ *
+ * In this function SVGA shader is emitted to an in-memory buffer that
+ * can be dynamically grown.  Once we've finished and know how large
+ * it is, it will be copied to a hardware buffer for upload.
+ */
+static struct svga_shader_result *
+svga_tgsi_translate( const struct svga_shader *shader,
+                     union svga_compile_key key,
+                     unsigned unit )
+{
+   struct svga_shader_result *result = NULL;
+   struct svga_shader_emitter emit;
+   int ret = 0;
+
+   memset(&emit, 0, sizeof(emit));
+
+   emit.use_sm30 = shader->use_sm30;
+   emit.size = 1024;
+   emit.buf = MALLOC(emit.size);
+   if (emit.buf == NULL) {
+      ret = PIPE_ERROR_OUT_OF_MEMORY;
+      goto fail;
+   }
+
+   emit.ptr = emit.buf;
+   emit.unit = unit;
+   emit.key = key;
+
+   tgsi_scan_shader( shader->tokens, &emit.info);
+
+   emit.imm_start = emit.info.file_max[TGSI_FILE_CONSTANT] + 1;
+   
+   if (unit == PIPE_SHADER_FRAGMENT)
+      emit.imm_start += key.fkey.num_unnormalized_coords;
+
+   if (unit == PIPE_SHADER_VERTEX) {
+      emit.imm_start += key.vkey.need_prescale ? 2 : 0;
+      emit.imm_start += key.vkey.num_zero_stride_vertex_elements;
+   }
+
+   emit.nr_hw_const = (emit.imm_start + emit.info.file_max[TGSI_FILE_IMMEDIATE] + 1);
+
+   emit.nr_hw_temp = emit.info.file_max[TGSI_FILE_TEMPORARY] + 1;
+   emit.in_main_func = TRUE;
+
+   if (!svga_shader_emit_header( &emit ))
+      goto fail;
+
+   if (!svga_shader_emit_instructions( &emit, shader->tokens ))
+      goto fail;
+   
+   result = CALLOC_STRUCT(svga_shader_result);
+   if (result == NULL)
+      goto fail;
+
+   result->shader = shader;
+   result->tokens = (const unsigned *)emit.buf;
+   result->nr_tokens = (emit.ptr - emit.buf) / sizeof(unsigned);
+   memcpy(&result->key, &key, sizeof key);
+
+   return result;
+
+fail:
+   FREE(result);
+   FREE(emit.buf);
+   return NULL;
+}
+
+
+
+
+struct svga_shader_result *
+svga_translate_fragment_program( const struct svga_fragment_shader *fs,
+                                 const struct svga_fs_compile_key *fkey )
+{
+   union svga_compile_key key;
+   memcpy(&key.fkey, fkey, sizeof *fkey);
+
+   return svga_tgsi_translate( &fs->base, 
+                               key,
+                               PIPE_SHADER_FRAGMENT );
+}
+
+struct svga_shader_result *
+svga_translate_vertex_program( const struct svga_vertex_shader *vs,
+                               const struct svga_vs_compile_key *vkey )
+{
+   union svga_compile_key key;
+   memcpy(&key.vkey, vkey, sizeof *vkey);
+
+   return svga_tgsi_translate( &vs->base, 
+                               key,
+                               PIPE_SHADER_VERTEX );
+}
+
+
+void svga_destroy_shader_result( struct svga_shader_result *result )
+{
+   FREE((unsigned *)result->tokens);
+   FREE(result);
+}
+