From 310da7bfd266ef2cab8f545b81e25bbc8e187a52 Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Tue, 31 Mar 2015 16:59:21 +0000
Subject: [PATCH] Implement fmin using __builtin_fmin

This ensures correct handling of NaN.

This has been tested with piglit, OpenCV, and the ocl conformance tests.

llvm-svn: 233712
---
 libclc/generic/include/clc/math/fmin.h |  5 +----
 libclc/generic/lib/math/fmin.cl        | 13 +++++++++----
 libclc/generic/lib/math/fmin.inc       | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+), 8 deletions(-)
 create mode 100644 libclc/generic/lib/math/fmin.inc

diff --git a/libclc/generic/include/clc/math/fmin.h b/libclc/generic/include/clc/math/fmin.h
index 5588ba93a8b8..d45f572e08b0 100644
--- a/libclc/generic/include/clc/math/fmin.h
+++ b/libclc/generic/include/clc/math/fmin.h
@@ -1,8 +1,5 @@
-#undef fmin
-#define fmin __clc_fmin
-
 #define __CLC_BODY <clc/math/binary_decl.inc>
-#define __CLC_FUNCTION __clc_fmin
+#define __CLC_FUNCTION fmin
 
 #include <clc/math/gentype.inc>
 
diff --git a/libclc/generic/lib/math/fmin.cl b/libclc/generic/lib/math/fmin.cl
index a61ad4757289..28c7d0125a93 100644
--- a/libclc/generic/lib/math/fmin.cl
+++ b/libclc/generic/lib/math/fmin.cl
@@ -1,11 +1,16 @@
 #include <clc/clc.h>
 
+#include "../clcmacro.h"
+
+_CLC_DEFINE_BINARY_BUILTIN(float, fmin, __builtin_fminf, float, float);
+
 #ifdef cl_khr_fp64
+
 #pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_DEFINE_BINARY_BUILTIN(double, fmin, __builtin_fmin, double, double);
+
 #endif
 
-#define FUNCTION __clc_fmin
-#define FUNCTION_IMPL(x, y) ((y) < (x) ? (y) : (x))
-
-#define __CLC_BODY <binary_impl.inc>
+#define __CLC_BODY <fmin.inc>
 #include <clc/math/gentype.inc>
diff --git a/libclc/generic/lib/math/fmin.inc b/libclc/generic/lib/math/fmin.inc
new file mode 100644
index 000000000000..d4b5ac2d62a7
--- /dev/null
+++ b/libclc/generic/lib/math/fmin.inc
@@ -0,0 +1,18 @@
+
+#if !defined(__CLC_SCALAR)
+
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE fmin(__CLC_GENTYPE x, float y) {
+  return fmin(x, (__CLC_GENTYPE)((__CLC_SCALAR_GENTYPE)y));
+}
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE fmin(__CLC_GENTYPE x, double y) {
+  return fmin(x, (__CLC_GENTYPE)((__CLC_SCALAR_GENTYPE)y));
+}
+
+#endif // ifdef cl_khr_fp64
+
+#endif // !defined(__CLC_SCALAR)