tgsi/ureg: implement support for array temporaries

Don't bother with free temporaries, just allocate them at
the end and also emit them in their own declaration.

Signed-off-by: Christian König <christian.koenig@amd.com>

src/gallium/auxiliary/tgsi/tgsi_ureg.c

@@ -153,6 +153,7 @@ struct ureg_program
 
    struct util_bitmask *free_temps;
    struct util_bitmask *local_temps;
+   struct util_bitmask *decl_temps;
    unsigned nr_temps;
 
    struct const_decl const_decls;
@@ -547,13 +548,18 @@ static struct ureg_dst alloc_temporary( struct ureg_program *ureg,
 
    /* Or allocate a new one.
     */
-   if (i == UTIL_BITMASK_INVALID_INDEX)
+   if (i == UTIL_BITMASK_INVALID_INDEX) {
       i = ureg->nr_temps++;
 
-   util_bitmask_clear(ureg->free_temps, i);
+      if (local)
+         util_bitmask_set(ureg->local_temps, i);
 
-   if (local)
-      util_bitmask_set(ureg->local_temps, i);
+      /* Start a new declaration when the local flag changes */
+      if (!i || util_bitmask_get(ureg->local_temps, i - 1) != local)
+         util_bitmask_set(ureg->decl_temps, i);
+   }
+
+   util_bitmask_clear(ureg->free_temps, i);
 
    return ureg_dst_register( TGSI_FILE_TEMPORARY, i );
 }
@@ -568,6 +574,24 @@ struct ureg_dst ureg_DECL_local_temporary( struct ureg_program *ureg )
    return alloc_temporary(ureg, TRUE);
 }
 
+struct ureg_dst ureg_DECL_array_temporary( struct ureg_program *ureg,
+                                           unsigned size,
+                                           boolean local )
+{
+   unsigned i = ureg->nr_temps;
+   struct ureg_dst dst = ureg_dst_register( TGSI_FILE_TEMPORARY, i );
+
+   if (local)
+      util_bitmask_set(ureg->local_temps, i);
+
+   util_bitmask_set(ureg->decl_temps, i);
+
+   ureg->nr_temps += size;
+   util_bitmask_set(ureg->decl_temps, ureg->nr_temps);
+
+   return dst;
+}
+
 void ureg_release_temporary( struct ureg_program *ureg,
                              struct ureg_dst tmp )
 {
@@ -856,11 +880,11 @@ ureg_emit_src( struct ureg_program *ureg,
    }
 
    if (src.Dimension) {
+      out[0].src.Dimension = 1;
+      out[n].dim.Dimension = 0;
+      out[n].dim.Padding = 0;
       if (src.DimIndirect) {
-         out[0].src.Dimension = 1;
          out[n].dim.Indirect = 1;
-         out[n].dim.Dimension = 0;
-         out[n].dim.Padding = 0;
          out[n].dim.Index = src.DimensionIndex;
          n++;
          out[n].value = 0;
@@ -871,10 +895,7 @@ ureg_emit_src( struct ureg_program *ureg,
          out[n].src.SwizzleW = src.DimIndSwizzle;
          out[n].src.Index = src.DimIndIndex;
       } else {
-         out[0].src.Dimension = 1;
          out[n].dim.Indirect = 0;
-         out[n].dim.Dimension = 0;
-         out[n].dim.Padding = 0;
          out[n].dim.Index = src.DimensionIndex;
       }
       n++;
@@ -1536,9 +1557,10 @@ static void emit_decls( struct ureg_program *ureg )
    if (ureg->nr_temps) {
       for (i = 0; i < ureg->nr_temps;) {
          boolean local = util_bitmask_get(ureg->local_temps, i);
-         unsigned first = i++;
-         while (i < ureg->nr_temps && local == util_bitmask_get(ureg->local_temps, i))
-            ++i;
+         unsigned first = i;
+         i = util_bitmask_get_next_index(ureg->decl_temps, i + 1);
+         if (i == UTIL_BITMASK_INVALID_INDEX)
+            i = ureg->nr_temps;
 
          emit_decl_temps( ureg, first, i - 1, local );
       }
@@ -1707,8 +1729,14 @@ struct ureg_program *ureg_create( unsigned processor )
    if (ureg->local_temps == NULL)
       goto no_local_temps;
 
+   ureg->decl_temps = util_bitmask_create();
+   if (ureg->decl_temps == NULL)
+      goto no_decl_temps;
+
    return ureg;
 
+no_decl_temps:
+   util_bitmask_destroy(ureg->local_temps);
 no_local_temps:
    util_bitmask_destroy(ureg->free_temps);
 no_free_temps:
@@ -1730,6 +1758,7 @@ void ureg_destroy( struct ureg_program *ureg )
 
    util_bitmask_destroy(ureg->free_temps);
    util_bitmask_destroy(ureg->local_temps);
+   util_bitmask_destroy(ureg->decl_temps);
 
    FREE(ureg);
 }

src/gallium/auxiliary/tgsi/tgsi_ureg.h

@@ -71,17 +71,17 @@ struct ureg_src
  */
 struct ureg_dst
 {
-   unsigned File        : 4;  /* TGSI_FILE_ */
-   unsigned WriteMask   : 4;  /* TGSI_WRITEMASK_ */
-   unsigned Indirect    : 1;  /* BOOL */
-   unsigned Saturate    : 1;  /* BOOL */
-   unsigned Predicate   : 1;
-   unsigned PredNegate  : 1;  /* BOOL */
-   unsigned PredSwizzleX: 2;  /* TGSI_SWIZZLE_ */
-   unsigned PredSwizzleY: 2;  /* TGSI_SWIZZLE_ */
-   unsigned PredSwizzleZ: 2;  /* TGSI_SWIZZLE_ */
-   unsigned PredSwizzleW: 2;  /* TGSI_SWIZZLE_ */
-   int      Index       : 16; /* SINT */
+   unsigned File            : 4;  /* TGSI_FILE_ */
+   unsigned WriteMask       : 4;  /* TGSI_WRITEMASK_ */
+   unsigned Indirect        : 1;  /* BOOL */
+   unsigned Saturate        : 1;  /* BOOL */
+   unsigned Predicate       : 1;
+   unsigned PredNegate      : 1;  /* BOOL */
+   unsigned PredSwizzleX    : 2;  /* TGSI_SWIZZLE_ */
+   unsigned PredSwizzleY    : 2;  /* TGSI_SWIZZLE_ */
+   unsigned PredSwizzleZ    : 2;  /* TGSI_SWIZZLE_ */
+   unsigned PredSwizzleW    : 2;  /* TGSI_SWIZZLE_ */
+   int      Index           : 16; /* SINT */
    int      IndirectIndex   : 16; /* SINT */
    int      IndirectSwizzle : 2;  /* TGSI_SWIZZLE_ */
 };
@@ -280,6 +280,14 @@ ureg_DECL_temporary( struct ureg_program * );
 struct ureg_dst
 ureg_DECL_local_temporary( struct ureg_program * );
 
+/**
+ * Declare "size" continuous temporary registers.
+ */
+struct ureg_dst
+ureg_DECL_array_temporary( struct ureg_program *,
+                           unsigned size,
+                           boolean local );
+
 void 
 ureg_release_temporary( struct ureg_program *ureg,
                         struct ureg_dst tmp );
@@ -1093,6 +1101,14 @@ ureg_src_dimension_indirect( struct ureg_src reg, struct ureg_src addr,
    return reg;
 }
 
+static INLINE struct ureg_dst
+ureg_dst_array_offset( struct ureg_dst reg, int offset )
+{
+   assert(reg.File == TGSI_FILE_TEMPORARY);
+   reg.Index += offset;
+   return reg;
+}
+
 static INLINE struct ureg_dst
 ureg_dst( struct ureg_src src )
 {