41 #ifndef INCLUDED_volk_16i_max_star_horizontal_16i_a_H
42 #define INCLUDED_volk_16i_max_star_horizontal_16i_a_H
52 #include <emmintrin.h>
53 #include <tmmintrin.h>
54 #include <xmmintrin.h>
58 unsigned int num_points)
60 const unsigned int num_bytes = num_points * 2;
62 static const uint8_t shufmask0[16] = {
63 0x00, 0x01, 0x04, 0x05, 0x08, 0x09, 0x0c, 0x0d,
64 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
66 static const uint8_t shufmask1[16] = {
67 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
68 0x00, 0x01, 0x04, 0x05, 0x08, 0x09, 0x0c, 0x0d
70 static const uint8_t andmask0[16] = {
71 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
72 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
74 static const uint8_t andmask1[16] = {
75 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
76 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02
79 __m128i xmm0 = {}, xmm1 = {}, xmm2 = {}, xmm3 = {}, xmm4 = {};
80 __m128i xmm5 = {}, xmm6 = {}, xmm7 = {}, xmm8 = {};
82 xmm4 = _mm_load_si128((__m128i*)shufmask0);
83 xmm5 = _mm_load_si128((__m128i*)shufmask1);
84 xmm6 = _mm_load_si128((__m128i*)andmask0);
85 xmm7 = _mm_load_si128((__m128i*)andmask1);
87 __m128i *p_target, *p_src0;
89 p_target = (__m128i*)target;
90 p_src0 = (__m128i*)src0;
92 int bound = num_bytes >> 5;
93 int intermediate = (num_bytes >> 4) & 1;
94 int leftovers = (num_bytes >> 1) & 7;
98 for (i = 0; i < bound; ++
i) {
99 xmm0 = _mm_load_si128(p_src0);
100 xmm1 = _mm_load_si128(&p_src0[1]);
102 xmm2 = _mm_xor_si128(xmm2, xmm2);
105 xmm3 = _mm_hsub_epi16(xmm0, xmm1);
107 xmm2 = _mm_cmpgt_epi16(xmm2, xmm3);
109 xmm8 = _mm_and_si128(xmm2, xmm6);
110 xmm3 = _mm_and_si128(xmm2, xmm7);
113 xmm8 = _mm_add_epi8(xmm8, xmm4);
114 xmm3 = _mm_add_epi8(xmm3, xmm5);
116 xmm0 = _mm_shuffle_epi8(xmm0, xmm8);
117 xmm1 = _mm_shuffle_epi8(xmm1, xmm3);
120 xmm3 = _mm_add_epi16(xmm0, xmm1);
123 _mm_store_si128(p_target, xmm3);
129 xmm0 = _mm_load_si128(p_src0);
131 xmm2 = _mm_xor_si128(xmm2, xmm2);
134 xmm3 = _mm_hsub_epi16(xmm0, xmm1);
135 xmm2 = _mm_cmpgt_epi16(xmm2, xmm3);
137 xmm8 = _mm_and_si128(xmm2, xmm6);
139 xmm3 = _mm_add_epi8(xmm8, xmm4);
141 xmm0 = _mm_shuffle_epi8(xmm0, xmm3);
143 _mm_storel_pd((
double*)p_target,
bit128_p(&xmm0)->double_vec);
145 p_target = (__m128i*)((int8_t*)p_target + 8);
148 for (i = (bound << 4) + (intermediate << 3);
149 i < (bound << 4) + (intermediate << 3) + leftovers;
151 target[i >> 1] = ((int16_t)(src0[i] - src0[i + 1]) > 0) ? src0[i] : src0[i + 1];
159 #include <arm_neon.h>
162 unsigned int num_points)
164 const unsigned int eighth_points = num_points / 16;
166 int16x8x2_t input_vec;
167 int16x8_t diff, max_vec, zeros;
168 uint16x8_t comp1, comp2;
169 zeros = vdupq_n_s16(0);
170 for (number = 0; number < eighth_points; ++number) {
171 input_vec = vld2q_s16(src0);
173 diff = vsubq_s16(input_vec.val[0], input_vec.val[1]);
174 comp1 = vcgeq_s16(diff, zeros);
175 comp2 = vcltq_s16(diff, zeros);
177 input_vec.val[0] = vandq_s16(input_vec.val[0], (int16x8_t)comp1);
178 input_vec.val[1] = vandq_s16(input_vec.val[1], (int16x8_t)comp2);
180 max_vec = vaddq_s16(input_vec.val[0], input_vec.val[1]);
181 vst1q_s16(target, max_vec);
185 for (number = 0; number < num_points % 16; number += 2) {
186 target[number >> 1] = ((int16_t)(src0[number] - src0[number + 1]) > 0)
193 #ifdef LV_HAVE_NEONV7
194 extern void volk_16i_max_star_horizontal_16i_a_neonasm(int16_t* target,
196 unsigned int num_points);
199 #ifdef LV_HAVE_GENERIC
202 unsigned int num_points)
204 const unsigned int num_bytes = num_points * 2;
208 int bound = num_bytes >> 1;
210 for (i = 0; i < bound; i += 2) {
211 target[i >> 1] = ((int16_t)(src0[i] - src0[i + 1]) > 0) ? src0[i] : src0[i + 1];
#define bit128_p(x)
Definition: volk_common.h:147
static void volk_16i_max_star_horizontal_16i_generic(int16_t *target, int16_t *src0, unsigned int num_points)
Definition: volk_16i_max_star_horizontal_16i.h:200
for i
Definition: volk_config_fixed.tmpl.h:13
static void volk_16i_max_star_horizontal_16i_neon(int16_t *target, int16_t *src0, unsigned int num_points)
Definition: volk_16i_max_star_horizontal_16i.h:160
static void volk_16i_max_star_horizontal_16i_a_ssse3(int16_t *target, int16_t *src0, unsigned int num_points)
Definition: volk_16i_max_star_horizontal_16i.h:56