Merge pull request #28 from hubues/master

Include copy of fmath with fix for archs other than amd64
ungerik · May 20, 2021 · 9ffa86f · 9ffa86f
2 parents d82aece + ea46c66
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diff --git a/fmath/LICENSE b/fmath/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2011 Arne Vansteenkiste. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of the author nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/fmath/README b/fmath/README
@@ -0,0 +1,8 @@
+32-bit floating point math library for GO.
+
+This library provides float32 counterparts for Go's float64 math functions.
+E.g.: Sqrtf(x float32) float32.
+
+The implementation partially uses assembly code (see, e.g., sqrtf_amd64.s) for fast computation. However, when no assembly implementation exists yet a generic implementation is used which uses Go's float64 math functions underneath.
+
+Note: the assembly code is not goinstallable on all platforms. Therefore, goinstall will compile the portable implementation. If you manually execute "make install", you will get the faster implementation.
diff --git a/fmath/absf.go b/fmath/absf.go
@@ -0,0 +1,16 @@
+// Copyright 2011 Arne Vansteenkiste. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file provides a trivial implementation based on
+// Go's float64 math library. It may be overridden by an
+// assembly implementation when available for the platform.
+
+package fmath
+
+import "math"
+
+// float32 version of math.Fabsf
+func Abs(x float32) float32 {
+	return float32(math.Abs(float64(x)))
+}
diff --git a/fmath/acosf.go b/fmath/acosf.go
@@ -0,0 +1,16 @@
+// Copyright 2011 Arne Vansteenkiste. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file provides a trivial implementation based on
+// Go's float64 math library. It may be overridden by an
+// assembly implementation when available for the platform.
+
+package fmath
+
+import "math"
+
+// float32 version of math.Acos
+func Acos(x float32) float32 {
+	return float32(math.Acos(float64(x)))
+}
diff --git a/fmath/acoshf.go b/fmath/acoshf.go
@@ -0,0 +1,16 @@
+// Copyright 2011 Arne Vansteenkiste. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file provides a trivial implementation based on
+// Go's float64 math library. It may be overridden by an
+// assembly implementation when available for the platform.
+
+package fmath
+
+import "math"
+
+// float32 version of math.Acosh
+func Acosh(x float32) float32 {
+	return float32(math.Acosh(float64(x)))
+}