[libclc] r213760 - Implement atan2 builtin
Tom Stellard
thomas.stellard at amd.com
Wed Jul 23 08:16:16 PDT 2014
Author: tstellar
Date: Wed Jul 23 10:16:16 2014
New Revision: 213760
URL: http://llvm.org/viewvc/llvm-project?rev=213760&view=rev
Log:
Implement atan2 builtin
Added:
libclc/trunk/generic/include/clc/math/atan2.h
libclc/trunk/generic/include/clc/math/atan2.inc
libclc/trunk/generic/include/clc/math/copysign.h
libclc/trunk/generic/lib/math/atan2.cl
Modified:
libclc/trunk/generic/include/clc/clc.h
libclc/trunk/generic/lib/SOURCES
Modified: libclc/trunk/generic/include/clc/clc.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/clc.h?rev=213760&r1=213759&r2=213760&view=diff
==============================================================================
--- libclc/trunk/generic/include/clc/clc.h (original)
+++ libclc/trunk/generic/include/clc/clc.h Wed Jul 23 10:16:16 2014
@@ -33,6 +33,8 @@
/* 6.11.2 Math Functions */
#include <clc/math/atan.h>
+#include <clc/math/atan2.h>
+#include <clc/math/copysign.h>
#include <clc/math/cos.h>
#include <clc/math/ceil.h>
#include <clc/math/exp.h>
Added: libclc/trunk/generic/include/clc/math/atan2.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/math/atan2.h?rev=213760&view=auto
==============================================================================
--- libclc/trunk/generic/include/clc/math/atan2.h (added)
+++ libclc/trunk/generic/include/clc/math/atan2.h Wed Jul 23 10:16:16 2014
@@ -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/atan2.inc>
+#include <clc/math/gentype.inc>
Added: libclc/trunk/generic/include/clc/math/atan2.inc
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/math/atan2.inc?rev=213760&view=auto
==============================================================================
--- libclc/trunk/generic/include/clc/math/atan2.inc (added)
+++ libclc/trunk/generic/include/clc/math/atan2.inc Wed Jul 23 10:16:16 2014
@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE atan2(__CLC_GENTYPE a, __CLC_GENTYPE b);
Added: libclc/trunk/generic/include/clc/math/copysign.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/math/copysign.h?rev=213760&view=auto
==============================================================================
--- libclc/trunk/generic/include/clc/math/copysign.h (added)
+++ libclc/trunk/generic/include/clc/math/copysign.h Wed Jul 23 10:16:16 2014
@@ -0,0 +1 @@
+#define copysign(x, y) __builtin_copysign(x, y)
Modified: libclc/trunk/generic/lib/SOURCES
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/SOURCES?rev=213760&r1=213759&r2=213760&view=diff
==============================================================================
--- libclc/trunk/generic/lib/SOURCES (original)
+++ libclc/trunk/generic/lib/SOURCES Wed Jul 23 10:16:16 2014
@@ -28,6 +28,7 @@ integer/sub_sat_if.ll
integer/sub_sat_impl.ll
integer/upsample.cl
math/atan.cl
+math/atan2.cl
math/exp.cl
math/exp10.cl
math/fmax.cl
Added: libclc/trunk/generic/lib/math/atan2.cl
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/atan2.cl?rev=213760&view=auto
==============================================================================
--- libclc/trunk/generic/lib/math/atan2.cl (added)
+++ libclc/trunk/generic/lib/math/atan2.cl Wed Jul 23 10:16:16 2014
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+
+#include "math.h"
+#include "../clcmacro.h"
+
+#include <clc/clc.h>
+
+_CLC_OVERLOAD _CLC_DEF float atan2(float y, float x)
+{
+ const float pi = 0x1.921fb6p+1f;
+ const float piby2 = 0x1.921fb6p+0f;
+ const float piby4 = 0x1.921fb6p-1f;
+ const float threepiby4 = 0x1.2d97c8p+1f;
+
+ float ax = fabs(x);
+ float ay = fabs(y);
+ float v = min(ax, ay);
+ float u = max(ax, ay);
+
+ // Scale since u could be large, as in "regular" divide
+ float s = u > 0x1.0p+96f ? 0x1.0p-32f : 1.0f;
+ float vbyu = s * MATH_DIVIDE(v, s*u);
+
+ float vbyu2 = vbyu * vbyu;
+
+#define USE_2_2_APPROXIMATION
+#if defined USE_2_2_APPROXIMATION
+ float p = mad(vbyu2, mad(vbyu2, -0x1.7e1f78p-9f, -0x1.7d1b98p-3f), -0x1.5554d0p-2f) * vbyu2 * vbyu;
+ float q = mad(vbyu2, mad(vbyu2, 0x1.1a714cp-2f, 0x1.287c56p+0f), 1.0f);
+#else
+ float p = mad(vbyu2, mad(vbyu2, -0x1.55cd22p-5f, -0x1.26cf76p-2f), -0x1.55554ep-2f) * vbyu2 * vbyu;
+ float q = mad(vbyu2, mad(vbyu2, mad(vbyu2, 0x1.9f1304p-5f, 0x1.2656fap-1f), 0x1.76b4b8p+0f), 1.0f);
+#endif
+
+ // Octant 0 result
+ float a = mad(p, MATH_RECIP(q), vbyu);
+
+ // Fix up 3 other octants
+ float at = piby2 - a;
+ a = ay > ax ? at : a;
+ at = pi - a;
+ a = x < 0.0F ? at : a;
+
+ // y == 0 => 0 for x >= 0, pi for x < 0
+ at = as_int(x) < 0 ? pi : 0.0f;
+ a = y == 0.0f ? at : a;
+
+ // if (!FINITE_ONLY()) {
+ // x and y are +- Inf
+ at = x > 0.0f ? piby4 : threepiby4;
+ a = ax == INFINITY & ay == INFINITY ? at : a;
+
+ // x or y is NaN
+ a = isnan(x) | isnan(y) ? as_float(QNANBITPATT_SP32) : a;
+ // }
+
+ // Fixup sign and return
+ return copysign(a, y);
+}
+
+_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, atan2, float, float);
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