Import code from previous AssetBuilder version

thirdparty/libsquish/simd_ve.h

@@ -0,0 +1,166 @@
+/* -----------------------------------------------------------------------------
+
+    Copyright (c) 2006 Simon Brown                          si@sjbrown.co.uk
+
+    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.
+
+   -------------------------------------------------------------------------- */
+
+#ifndef SQUISH_SIMD_VE_H
+#define SQUISH_SIMD_VE_H
+
+#include <altivec.h>
+#undef bool
+
+namespace squish {
+
+#define VEC4_CONST( X ) Vec4( ( vector float ){ X } )
+
+class Vec4
+{
+public:
+    typedef Vec4 Arg;
+
+    Vec4() {}
+
+    explicit Vec4( vector float v ) : m_v( v ) {}
+
+    Vec4( Vec4 const& arg ) : m_v( arg.m_v ) {}
+
+    Vec4& operator=( Vec4 const& arg )
+    {
+        m_v = arg.m_v;
+        return *this;
+    }
+
+    explicit Vec4( float s )
+    {
+        union { vector float v; float c[4]; } u;
+        u.c[0] = s;
+        u.c[1] = s;
+        u.c[2] = s;
+        u.c[3] = s;
+        m_v = u.v;
+    }
+
+    Vec4( float x, float y, float z, float w )
+    {
+        union { vector float v; float c[4]; } u;
+        u.c[0] = x;
+        u.c[1] = y;
+        u.c[2] = z;
+        u.c[3] = w;
+        m_v = u.v;
+    }
+
+    Vec3 GetVec3() const
+    {
+        union { vector float v; float c[4]; } u;
+        u.v = m_v;
+        return Vec3( u.c[0], u.c[1], u.c[2] );
+    }
+
+    Vec4 SplatX() const { return Vec4( vec_splat( m_v, 0 ) ); }
+    Vec4 SplatY() const { return Vec4( vec_splat( m_v, 1 ) ); }
+    Vec4 SplatZ() const { return Vec4( vec_splat( m_v, 2 ) ); }
+    Vec4 SplatW() const { return Vec4( vec_splat( m_v, 3 ) ); }
+
+    Vec4& operator+=( Arg v )
+    {
+        m_v = vec_add( m_v, v.m_v );
+        return *this;
+    }
+
+    Vec4& operator-=( Arg v )
+    {
+        m_v = vec_sub( m_v, v.m_v );
+        return *this;
+    }
+
+    Vec4& operator*=( Arg v )
+    {
+        m_v = vec_madd( m_v, v.m_v, ( vector float ){ -0.0f } );
+        return *this;
+    }
+
+    friend Vec4 operator+( Vec4::Arg left, Vec4::Arg right  )
+    {
+        return Vec4( vec_add( left.m_v, right.m_v ) );
+    }
+
+    friend Vec4 operator-( Vec4::Arg left, Vec4::Arg right  )
+    {
+        return Vec4( vec_sub( left.m_v, right.m_v ) );
+    }
+
+    friend Vec4 operator*( Vec4::Arg left, Vec4::Arg right  )
+    {
+        return Vec4( vec_madd( left.m_v, right.m_v, ( vector float ){ -0.0f } ) );
+    }
+
+    //! Returns a*b + c
+    friend Vec4 MultiplyAdd( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+    {
+        return Vec4( vec_madd( a.m_v, b.m_v, c.m_v ) );
+    }
+
+    //! Returns -( a*b - c )
+    friend Vec4 NegativeMultiplySubtract( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+    {
+        return Vec4( vec_nmsub( a.m_v, b.m_v, c.m_v ) );
+    }
+
+    friend Vec4 Reciprocal( Vec4::Arg v )
+    {
+        // get the reciprocal estimate
+        vector float estimate = vec_re( v.m_v );
+
+        // one round of Newton-Rhaphson refinement
+        vector float diff = vec_nmsub( estimate, v.m_v, ( vector float ){ 1.0f } );
+        return Vec4( vec_madd( diff, estimate, estimate ) );
+    }
+
+    friend Vec4 Min( Vec4::Arg left, Vec4::Arg right )
+    {
+        return Vec4( vec_min( left.m_v, right.m_v ) );
+    }
+
+    friend Vec4 Max( Vec4::Arg left, Vec4::Arg right )
+    {
+        return Vec4( vec_max( left.m_v, right.m_v ) );
+    }
+
+    friend Vec4 Truncate( Vec4::Arg v )
+    {
+        return Vec4( vec_trunc( v.m_v ) );
+    }
+
+    friend bool CompareAnyLessThan( Vec4::Arg left, Vec4::Arg right )
+    {
+        return vec_any_lt( left.m_v, right.m_v ) != 0;
+    }
+
+private:
+    vector float m_v;
+};
+
+} // namespace squish
+
+#endif // ndef SQUISH_SIMD_VE_H