llvmpipe: Several fixes of the conversion test.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_bld_const.c b/src/gallium/drivers/llvmpipe/lp_bld_const.c
index 20f0d3c40b..991cf24a9e 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_const.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_const.c
@@ -33,6 +33,7 @@
  * @author Jose Fonseca <jfonseca@vmware.com>
  */
 
+#include <float.h>
 
 #include "util/u_debug.h"
 
@@ -92,6 +93,27 @@ lp_const_scale(union lp_type type)
 }
 
 
+double
+lp_const_eps(union lp_type type)
+{
+   if (type.floating) {
+      switch(type.width) {
+      case 32:
+         return FLT_EPSILON;
+      case 64:
+         return DBL_EPSILON;
+      default:
+         assert(0);
+         return 0.0;
+      }
+   }
+   else {
+      double scale = lp_const_scale(type);
+      return 1.0/scale;
+   }
+}
+
+
 LLVMValueRef
 lp_build_undef(union lp_type type)
 {