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/*
* DDS GIMP plugin
*
* Copyright (C) 2004-2012 Shawn Kirst <skirst@gmail.com>,
* with parts (C) 2003 Arne Reuter <homepage@arnereuter.de> where specified.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef __VEC_H__
#define __VEC_H__
#include <math.h>
#ifdef __SSE__
#define USE_SSE 1
#endif
#ifdef USE_SSE
#include <immintrin.h>
#endif
#include "imath.h"
typedef float vec4_t __attribute__((vector_size(16)));
typedef float sym3x3_t[6];
#define VEC4_CONST4(x, y, z, w) {x, y, z, w}
#define VEC4_CONST3(x, y, z) {x, y, z, 0.0f}
#define VEC4_CONST1(x) {x, x, x, x}
static inline vec4_t
vec4_set (float x,
float y,
float z,
float w)
{
#ifdef USE_SSE
return _mm_setr_ps(x, y, z, w);
#else
vec4_t v = { x, y, z, w };
return v;
#endif
}
static inline vec4_t
vec4_set1 (float f)
{
#ifdef USE_SSE
return _mm_set1_ps(f);
#else
vec4_t v = { f, f, f, f };
return v;
#endif
}
static inline vec4_t
vec4_zero (void)
{
#ifdef USE_SSE
return _mm_setzero_ps();
#else
vec4_t v = { 0, 0, 0, 0 };
return v;
#endif
}
static inline void
vec4_store (float *f,
const vec4_t v)
{
#ifdef USE_SSE
_mm_store_ps (f, v);
#else
f[0] = v[0]; f[1] = v[1]; f[2] = v[2]; f[3] = v[3];
#endif
}
static inline vec4_t
vec4_splatx (const vec4_t v)
{
#ifdef USE_SSE
return _mm_shuffle_ps(v, v, 0x00);
#else
vec4_t r = { v[0], v[0], v[0], v[0] };
return r;
#endif
}
static inline vec4_t
vec4_splaty (const vec4_t v)
{
#ifdef USE_SSE
return _mm_shuffle_ps(v, v, 0x55);
#else
vec4_t r = { v[1], v[1], v[1], v[1] };
return r;
#endif
}
static inline vec4_t
vec4_splatz (const vec4_t v)
{
#ifdef USE_SSE
return _mm_shuffle_ps(v, v, 0xaa);
#else
vec4_t r = { v[2], v[2], v[2], v[2] };
return r;
#endif
}
static inline vec4_t
vec4_splatw (const vec4_t v)
{
#ifdef USE_SSE
return _mm_shuffle_ps(v, v, 0xff);
#else
vec4_t r = { v[3], v[3], v[3], v[3] };
return r;
#endif
}
static inline vec4_t
vec4_rcp (const vec4_t v)
{
#ifdef USE_SSE
__m128 est = _mm_rcp_ps (v);
__m128 diff = _mm_sub_ps (_mm_set1_ps(1.0f), _mm_mul_ps(est, v));
return _mm_add_ps(_mm_mul_ps(diff, est), est);
#else
vec4_t one = { 1.0f, 1.0f, 1.0f, 1.0f };
return one / v;
#endif
}
static inline vec4_t
vec4_min (const vec4_t a,
const vec4_t b)
{
#ifdef USE_SSE
return _mm_min_ps(a, b);
#else
return vec4_set (MIN(a[0], b[0]), MIN(a[1], b[1]), MIN(a[2], b[2]), MIN(a[3], b[3]));
#endif
}
static inline vec4_t
vec4_max (const vec4_t a,
const vec4_t b)
{
#ifdef USE_SSE
return _mm_max_ps (a, b);
#else
return vec4_set (MAX(a[0], b[0]), MAX(a[1], b[1]), MAX(a[2], b[2]), MAX(a[3], b[3]));
#endif
}
static inline vec4_t
vec4_trunc (const vec4_t v)
{
#ifdef USE_SSE
# ifdef __SSE4_1__
return _mm_round_ps(v, _MM_FROUND_TRUNC);
# elif defined(__SSE2__)
return _mm_cvtepi32_ps(_mm_cvttps_epi32(v));
# else
// convert to ints
__m128 in = v;
__m64 lo = _mm_cvttps_pi32(in);
__m64 hi = _mm_cvttps_pi32(_mm_movehl_ps(in, in));
// convert to floats
__m128 part = _mm_movelh_ps(in, _mm_cvtpi32_ps(in, hi));
__m128 trunc = _mm_cvtpi32_ps(part, lo);
// clear mmx state
_mm_empty ();
return trunc;
# endif
#else
vec4_t r = { v[0] > 0.0f ? floorf(v[0]) : ceil(v[0]),
v[1] > 0.0f ? floorf(v[1]) : ceil(v[1]),
v[2] > 0.0f ? floorf(v[2]) : ceil(v[2]),
v[3] > 0.0f ? floorf(v[3]) : ceil(v[3]), };
return r;
#endif
}
static inline float
vec4_accum (const vec4_t v)
{
#ifdef USE_SSE
float rv;
__m128 t;
# ifdef __SSE3__
t = _mm_hadd_ps(v, v);
t = _mm_hadd_ps(t, t);
# else
t = _mm_add_ps(v, _mm_movehl_ps(v, v));
t = _mm_add_ss(t, _mm_shuffle_ps(t, t, 0x01));
# endif
_mm_store_ss(&rv, t);
return rv;
#else
return v[0] + v[1] + v[2] + v[3];
#endif
}
static inline float
vec4_dot (const vec4_t a,
const vec4_t b)
{
#if defined(USE_SSE) && defined(__SSE4_1__)
float rv;
__m128 t = _mm_dp_ps(a, b, 0xff);
_mm_store_ss(&rv, t);
return rv;
#else
return vec4_accum(a * b);
#endif
}
static inline int
vec4_cmplt (const vec4_t a,
const vec4_t b)
{
#ifdef USE_SSE
__m128 bits = _mm_cmplt_ps(a, b);
int val = _mm_movemask_ps(bits);
return val != 0;
#else
return (a[0] < b[0]) || (a[1] < b[1]) || (a[2] < b[2]) || (a[3] < b[3]);
#endif
}
#endif /* __VEC_H__ */
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