experiment with the old 3dnow instruction set.

src/nvtt/squish/simd_3dnow.h

@@ -0,0 +1,212 @@
+/* -----------------------------------------------------------------------------
+
+	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_3DNOW_H
+#define SQUISH_SIMD_3DNOW_H
+
+//#include <xmmintrin.h>
+#include <mm3dnow.h>
+#include <cassert>
+
+//#define SQUISH_SSE_SPLAT( a )										\
+	( ( a ) | ( ( a ) << 2 ) | ( ( a ) << 4 ) | ( ( a ) << 6 ) )
+
+namespace squish {
+
+//#define VEC4_CONST( X ) Vec4( _mm_set1_ps( X ) )
+
+class Vec4
+{
+public:
+	typedef Vec4 const& Arg;
+
+	Vec4() {}
+		
+	Vec4( __m64 v0, __m64 v1 ) : m_v0( v0 ), m_v1( v1 ) {}
+	
+	Vec4( Vec4 const& arg ) : m_v0( arg.m_v0 ), m_v1( arg.m_v1 ) {}
+	
+	Vec4& operator=( Vec4 const& arg )
+	{
+		m_v0 = arg.m_v0;
+		m_v1 = arg.m_v1;
+		return *this;
+	}
+	
+/*	Vec4( float x, float y, float z, float w )
+	{
+		m_v = _mm_setr_ps( x, y, z, w );
+	}
+*/	
+/*	Vec3 GetVec3() const
+	{
+#ifdef __GNUC__
+		__attribute__ ((__aligned__ (16))) float c[4];
+#else
+		__declspec(align(16)) float c[4];
+#endif
+		//_mm_store_ps( c, m_v );
+		return Vec3( c[0], c[1], c[2] );
+	}
+*/	
+//	Vec4 SplatX() const { return Vec4( _mm_shuffle_ps( m_v, m_v, SQUISH_SSE_SPLAT( 0 ) ) ); }
+//	Vec4 SplatY() const { return Vec4( _mm_shuffle_ps( m_v, m_v, SQUISH_SSE_SPLAT( 1 ) ) ); }
+//	Vec4 SplatZ() const { return Vec4( _mm_shuffle_ps( m_v, m_v, SQUISH_SSE_SPLAT( 2 ) ) ); }
+//	Vec4 SplatW() const { return Vec4( _mm_shuffle_ps( m_v, m_v, SQUISH_SSE_SPLAT( 3 ) ) ); }
+
+	Vec4& operator+=( Arg v )
+	{
+		m_v0 = _m_pfadd( m_v0, v.m_v0 );
+		m_v1 = _m_pfadd( m_v1, v.m_v1 );
+		return *this;
+	}
+	
+	Vec4& operator-=( Arg v )
+	{
+		m_v0 = _m_pfsub( m_v0, v.m_v0 );
+		m_v1 = _m_pfsub( m_v1, v.m_v1 );
+		return *this;
+	}
+	
+	Vec4& operator*=( Arg v )
+	{
+		m_v0 = _m_pfmul( m_v0, v.m_v0 );
+		m_v1 = _m_pfmul( m_v1, v.m_v1 );
+		return *this;
+	}
+	
+	friend Vec4 operator+( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4(
+				_m_pfadd( left.m_v0, right.m_v0 ),
+				_m_pfadd( left.m_v1, right.m_v1 ));
+	}
+	
+	friend Vec4 operator-( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4(
+				_m_pfsub( left.m_v0, right.m_v0 ),
+				_m_pfsub( left.m_v1, right.m_v1 ));
+	}
+	
+	friend Vec4 operator*( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4(
+				_m_pfmul( left.m_v0, right.m_v0 ),
+				_m_pfmul( left.m_v1, right.m_v1 ));
+	}
+	
+	//! Returns a*b + c
+	friend Vec4 MultiplyAdd( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+	{
+		return Vec4(
+				_m_pfadd( _m_pfmul( a.m_v0, b.m_v0 ), c.m_v0 ),
+				_m_pfadd( _m_pfmul( a.m_v1, b.m_v1 ), c.m_v1 ));
+	}
+	
+	//! Returns -( a*b - c )
+	friend Vec4 NegativeMultiplySubtract( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+	{
+		return Vec4(
+				_m_pfsub( c.m_v0, _m_pfmul( a.m_v0, b.m_v0 ) ),
+				_m_pfsub( c.m_v1, _m_pfmul( a.m_v1, b.m_v1 ) ));
+	}
+	
+	friend Vec4 Reciprocal( Vec4::Arg v )
+	{
+		// get the reciprocal estimate
+		__m64 x0 = _m_pfrcp(v.m_v0);
+		__m64 y1 = _m_pfrcp(v.m_v1);
+
+		// Newton-Rhaphson refinement
+		__m64 x1 = _m_pfrcpit1(v.m_v0, x0);
+		__m64 y1 = _m_pfrcpit1(v.m_v1, y0);
+
+		__m64 x2 = _m_pfrcpit2(x1, x0);
+		__m64 y2 = _m_pfrcpit2(y1, y0);
+
+		return Vec4(x2, y2);
+	}
+	
+	friend Vec4 Min( Vec4::Arg left, Vec4::Arg right )
+	{
+		return Vec4(
+				_m_pfmin( left.m_v0, right.m_v0 ),
+				_m_pfmin( left.m_v1, right.m_v1 ));
+	}
+	
+	friend Vec4 Max( Vec4::Arg left, Vec4::Arg right )
+	{
+		return Vec4(
+				_m_pfmax( left.m_v0, right.m_v0 ),
+				_m_pfmax( left.m_v1, right.m_v1 ));
+	}
+	
+/*	friend Vec4 Truncate( Vec4::Arg v )
+	{
+		// convert to ints
+		__m128 input = v.m_v;
+		__m64 lo = _mm_cvttps_pi32( input );
+		__m64 hi = _mm_cvttps_pi32( _mm_movehl_ps( input, input ) );
+
+		// convert to floats
+		__m128 part = _mm_movelh_ps( input, _mm_cvtpi32_ps( input, hi ) );
+		__m128 truncated = _mm_cvtpi32_ps( part, lo );
+		
+		// clear out the MMX multimedia state to allow FP calls later
+		_m_femms(); 
+		return Vec4( truncated );
+	}
+*/	
+	friend Vec4 CompareEqual( Vec4::Arg left, Vec4::Arg right )
+	{
+		return Vec4(
+				_m_pfcmpeq( left.m_v0, right.m_v0 ),
+				_m_pfcmpeq( left.m_v1, right.m_v1 ));
+	}
+/*	
+	friend Vec4 Select( Vec4::Arg off, Vec4::Arg on, Vec4::Arg bits )
+	{
+        __m128 a = _mm_andnot_ps( bits.m_v, off.m_v );
+        __m128 b = _mm_and_ps( bits.m_v, on.m_v );
+
+        return Vec4( _mm_or_ps( a, b ) );
+	}
+*//*
+	friend bool CompareAnyLessThan( Vec4::Arg left, Vec4::Arg right ) 
+	{
+		__m128 bits = _mm_cmplt_ps( left.m_v, right.m_v );
+		int value = _mm_movemask_ps( bits );
+		return value != 0;
+	}
+*/
+private:
+	__m64 m_v0;
+	__m64 m_v1;
+};
+
+} // namespace squish
+
+#endif // ndef SQUISH_SIMD_3DNOW_H