From 402f54b0d1f69a2231e42b726ebaf8a726efa307 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Tue, 23 Feb 2010 21:16:18 -0700
Subject: [PATCH] gallivm: added clamp and int_to_float functions

---
 src/gallium/auxiliary/gallivm/lp_bld_arit.c | 41 ++++++++++++++++++++-
 src/gallium/auxiliary/gallivm/lp_bld_arit.h | 10 +++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.c b/src/gallium/auxiliary/gallivm/lp_bld_arit.c
index 54b31befe6d..bbce31f9eb2 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_arit.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.c
@@ -613,6 +613,22 @@ lp_build_max(struct lp_build_context *bld,
 }
 
 
+/**
+ * Generate clamp(a, min, max)
+ * Do checks for special cases.
+ */
+LLVMValueRef
+lp_build_clamp(struct lp_build_context *bld,
+               LLVMValueRef a,
+               LLVMValueRef min,
+               LLVMValueRef max)
+{
+   a = lp_build_min(bld, a, max);
+   a = lp_build_max(bld, a, min);
+   return a;
+}
+
+
 /**
  * Generate abs(a)
  */
@@ -693,6 +709,29 @@ lp_build_sgn(struct lp_build_context *bld,
 }
 
 
+/**
+ * Convert vector of int to vector of float.
+ */
+LLVMValueRef
+lp_build_int_to_float(struct lp_build_context *bld,
+                      LLVMValueRef a)
+{
+   const struct lp_type type = bld->type;
+
+   assert(type.floating);
+   /*assert(lp_check_value(type, a));*/
+
+   {
+      LLVMTypeRef vec_type = lp_build_vec_type(type);
+      /*LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);*/
+      LLVMValueRef res;
+      res = LLVMBuildSIToFP(bld->builder, a, vec_type, "");
+      return res;
+   }
+}
+
+
+
 enum lp_build_round_sse41_mode
 {
    LP_BUILD_ROUND_SSE41_NEAREST = 0,
@@ -819,7 +858,7 @@ lp_build_ceil(struct lp_build_context *bld,
 
 /**
  * Convert to integer, through whichever rounding method that's fastest,
- * typically truncating to zero.
+ * typically truncating toward zero.
  */
 LLVMValueRef
 lp_build_itrunc(struct lp_build_context *bld,
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.h b/src/gallium/auxiliary/gallivm/lp_bld_arit.h
index 62be4b9aee1..da84b7ca02d 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_arit.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.h
@@ -106,6 +106,12 @@ lp_build_max(struct lp_build_context *bld,
              LLVMValueRef a,
              LLVMValueRef b);
 
+LLVMValueRef
+lp_build_clamp(struct lp_build_context *bld,
+               LLVMValueRef a,
+               LLVMValueRef min,
+               LLVMValueRef max);
+
 LLVMValueRef
 lp_build_abs(struct lp_build_context *bld,
              LLVMValueRef a);
@@ -114,6 +120,10 @@ LLVMValueRef
 lp_build_sgn(struct lp_build_context *bld,
              LLVMValueRef a);
 
+LLVMValueRef
+lp_build_int_to_float(struct lp_build_context *bld,
+                      LLVMValueRef a);
+
 LLVMValueRef
 lp_build_round(struct lp_build_context *bld,
                LLVMValueRef a);
-- 
2.30.2