diff --git a/src/gallium/auxiliary/tgsi/tgsi_util.c b/src/gallium/auxiliary/tgsi/tgsi_util.c
index e1b604cff0e..d6ef81d281d 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_util.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_util.c
@@ -103,67 +103,6 @@ tgsi_util_set_src_register_swizzle(struct tgsi_src_register *reg,
 }
 
 
-unsigned
-tgsi_util_get_full_src_register_sign_mode(
-   const struct tgsi_full_src_register *reg,
-   UNUSED unsigned component)
-{
-   unsigned sign_mode;
-
-   if (reg->Register.Absolute) {
-      /* Consider only the post-abs negation. */
-
-      if (reg->Register.Negate) {
-         sign_mode = TGSI_UTIL_SIGN_SET;
-      }
-      else {
-         sign_mode = TGSI_UTIL_SIGN_CLEAR;
-      }
-   }
-   else {
-      if (reg->Register.Negate) {
-         sign_mode = TGSI_UTIL_SIGN_TOGGLE;
-      }
-      else {
-         sign_mode = TGSI_UTIL_SIGN_KEEP;
-      }
-   }
-
-   return sign_mode;
-}
-
-
-void
-tgsi_util_set_full_src_register_sign_mode(struct tgsi_full_src_register *reg,
-                                          unsigned sign_mode)
-{
-   switch (sign_mode) {
-   case TGSI_UTIL_SIGN_CLEAR:
-      reg->Register.Negate = 0;
-      reg->Register.Absolute = 1;
-      break;
-
-   case TGSI_UTIL_SIGN_SET:
-      reg->Register.Absolute = 1;
-      reg->Register.Negate = 1;
-      break;
-
-   case TGSI_UTIL_SIGN_TOGGLE:
-      reg->Register.Negate = 1;
-      reg->Register.Absolute = 0;
-      break;
-
-   case TGSI_UTIL_SIGN_KEEP:
-      reg->Register.Negate = 0;
-      reg->Register.Absolute = 0;
-      break;
-
-   default:
-      assert(0);
-   }
-}
-
-
 /**
  * Determine which channels of the specificed src register are effectively
  * used by this instruction.
diff --git a/src/gallium/auxiliary/tgsi/tgsi_util.h b/src/gallium/auxiliary/tgsi/tgsi_util.h
index 6dc576b1a00..e1f913d74b9 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_util.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_util.h
@@ -57,21 +57,6 @@ tgsi_util_set_src_register_swizzle(struct tgsi_src_register *reg,
                                    unsigned swizzle,
                                    unsigned component);
 
-
-#define TGSI_UTIL_SIGN_CLEAR    0   /* Force positive */
-#define TGSI_UTIL_SIGN_SET      1   /* Force negative */
-#define TGSI_UTIL_SIGN_TOGGLE   2   /* Negate */
-#define TGSI_UTIL_SIGN_KEEP     3   /* No change */
-
-unsigned
-tgsi_util_get_full_src_register_sign_mode(
-   const struct tgsi_full_src_register *reg,
-   unsigned component);
-
-void
-tgsi_util_set_full_src_register_sign_mode(struct tgsi_full_src_register *reg,
-                                          unsigned sign_mode);
-
 unsigned
 tgsi_util_get_inst_usage_mask(const struct tgsi_full_instruction *inst,
                               unsigned src_idx);
diff --git a/src/gallium/drivers/svga/svga_tgsi_insn.c b/src/gallium/drivers/svga/svga_tgsi_insn.c
index 29c5dc3548e..e2d0865d944 100644
--- a/src/gallium/drivers/svga/svga_tgsi_insn.c
+++ b/src/gallium/drivers/svga/svga_tgsi_insn.c
@@ -257,9 +257,7 @@ translate_src_register( const struct svga_shader_emitter *emit,
                   reg->Register.SwizzleZ,
                   reg->Register.SwizzleW );
 
-   /* src.mod isn't a bitfield, unfortunately:
-    * See tgsi_util_get_full_src_register_sign_mode for implementation details.
-    */
+   /* src.mod isn't a bitfield, unfortunately */
    if (reg->Register.Absolute) {
       if (reg->Register.Negate)
          src.base.srcMod = SVGA3DSRCMOD_ABSNEG;