tgsi: Add ureg_DECL_loop().

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index 61cd3bf40778b4a3ecf13d3d7211f5562f879bc4..5526a5d034b08086c48b565230195ef483dfadc8 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -72,6 +72,7 @@ struct ureg_tokens {
 #define UREG_MAX_IMMEDIATE 32
 #define UREG_MAX_TEMP 256
 #define UREG_MAX_ADDR 2
+#define UREG_MAX_LOOP 1
 #define UREG_MAX_PRED 1
 
 #define DOMAIN_DECL 0
@@ -117,6 +118,7 @@ struct ureg_program
 
    unsigned nr_addrs;
    unsigned nr_preds;
+   unsigned nr_loops;
    unsigned nr_instructions;
 
    struct ureg_tokens domain[2];
@@ -417,6 +419,19 @@ struct ureg_dst ureg_DECL_address( struct ureg_program *ureg )
    return ureg_dst_register( TGSI_FILE_ADDRESS, 0 );
 }
 
+/* Allocate a new loop register.
+ */
+struct ureg_dst
+ureg_DECL_loop(struct ureg_program *ureg)
+{
+   if (ureg->nr_loops < UREG_MAX_LOOP) {
+      return ureg_dst_register(TGSI_FILE_LOOP, ureg->nr_loops++);
+   }
+
+   assert(0);
+   return ureg_dst_register(TGSI_FILE_LOOP, 0);
+}
+
 /* Allocate a new predicate register.
  */
 struct ureg_dst
@@ -1015,6 +1030,13 @@ static void emit_decls( struct ureg_program *ureg )
                        0, ureg->nr_addrs );
    }
 
+   if (ureg->nr_loops) {
+      emit_decl_range(ureg,
+                      TGSI_FILE_LOOP,
+                      0,
+                      ureg->nr_loops);
+   }
+
    if (ureg->nr_preds) {
       emit_decl_range(ureg,
                       TGSI_FILE_PREDICATE,

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
index dae429119470ca3003a973bb2a140ea74f80f623..94cc70a208230655b7def30f3a53a42ef066fa0b 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
@@ -157,6 +157,9 @@ ureg_release_temporary( struct ureg_program *ureg,
 struct ureg_dst
 ureg_DECL_address( struct ureg_program * );
 
+struct ureg_dst
+ureg_DECL_loop( struct ureg_program * );
+
 struct ureg_dst
 ureg_DECL_predicate(struct ureg_program *);