gallivm: fix trunc/itrunc comment

trunc of -1.5 is -1.0 not 1.0...

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.c b/src/gallium/auxiliary/gallivm/lp_bld_arit.c
index 64c468c..4f108f6 100644 (file)
--- a/src/gallium/auxiliary/gallivm/lp_bld_arit.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.c
@@ -1054,9 +1054,9 @@ lp_build_round_sse41(struct lp_build_context *bld,
 
 
 /**
- * Return the integer part of a float (vector) value.  The returned value is
- * a float (vector).
- * Ex: trunc(-1.5) = 1.0
+ * Return the integer part of a float (vector) value (== round toward zero).
+ * The returned value is a float (vector).
+ * Ex: trunc(-1.5) = -1.0
  */
 LLVMValueRef
 lp_build_trunc(struct lp_build_context *bld,
@@ -1181,9 +1181,9 @@ lp_build_fract(struct lp_build_context *bld,
 
 
 /**
- * Return the integer part of a float (vector) value.  The returned value is
- * an integer (vector).
- * Ex: itrunc(-1.5) = 1
+ * Return the integer part of a float (vector) value (== round toward zero).
+ * The returned value is an integer (vector).
+ * Ex: itrunc(-1.5) = -1
  */
 LLVMValueRef
 lp_build_itrunc(struct lp_build_context *bld,