Implement modf math builtin

V2: use the reference implementation as suggested by Matt Arsenault

Patch By: Pavel Ondračka

git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@258933 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 120 insertions, 0 deletions

diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index fea578a..bd2f67f 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -67,6 +67,7 @@
 #include <clc/math/log1p.h>
 #include <clc/math/log2.h>
 #include <clc/math/mad.h>
+#include <clc/math/modf.h>
 #include <clc/math/nextafter.h>
 #include <clc/math/pow.h>
 #include <clc/math/pown.h>
diff --git a/generic/include/clc/math/modf.h b/generic/include/clc/math/modf.h
new file mode 100644
index 0000000..f0fb6ca
--- /dev/null
+++ b/generic/include/clc/math/modf.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#define __CLC_BODY <clc/math/modf.inc>
+#include <clc/math/gentype.inc>
diff --git a/generic/include/clc/math/modf.inc b/generic/include/clc/math/modf.inc
new file mode 100644
index 0000000..42bcf62
--- /dev/null
+++ b/generic/include/clc/math/modf.inc
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2014, 2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE modf(__CLC_GENTYPE x, global __CLC_GENTYPE *iptr);
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE modf(__CLC_GENTYPE x, local __CLC_GENTYPE *iptr);
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE modf(__CLC_GENTYPE x, private __CLC_GENTYPE *iptr);
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index b186301..1daae8d 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -96,6 +96,7 @@ math/log10.cl
 math/log1p.cl
 math/log2.cl
 math/mad.cl
+math/modf.cl
 math/native_log.cl
 math/native_log2.cl
 math/tables.cl
diff --git a/generic/lib/math/modf.cl b/generic/lib/math/modf.cl
new file mode 100644
index 0000000..3294fbc
--- /dev/null
+++ b/generic/lib/math/modf.cl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <clc/clc.h>
+
+#include "math.h"
+
+#ifdef cl_khr_fp64
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+#endif
+
+#define __CLC_BODY <modf.inc>
+#include <clc/math/gentype.inc>
diff --git a/generic/lib/math/modf.inc b/generic/lib/math/modf.inc
new file mode 100644
index 0000000..1486b76
--- /dev/null
+++ b/generic/lib/math/modf.inc
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE modf(__CLC_GENTYPE x, __CLC_GENTYPE *iptr) {
+  *iptr = trunc(x);
+  return copysign(isinf(x) ? 0.0f : x - *iptr, x);
+}
+
+#define MODF_DEF(addrspace) \
+  _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE modf(__CLC_GENTYPE x, addrspace __CLC_GENTYPE *iptr) { \
+    __CLC_GENTYPE private_iptr; \
+    __CLC_GENTYPE ret = modf(x, &private_iptr); \
+    *iptr = private_iptr; \
+    return ret; \
+}
+
+MODF_DEF(local);
+MODF_DEF(global);