diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vlib/buffer_funcs.c | 155 | ||||
| -rw-r--r-- | src/vppinfra/CMakeLists.txt | 18 | ||||
| -rw-r--r-- | src/vppinfra/cpu.c | 12 | ||||
| -rw-r--r-- | src/vppinfra/cpu.h | 1 | ||||
| -rw-r--r-- | src/vppinfra/test_vector_funcs.c | 42 | ||||
| -rw-r--r-- | src/vppinfra/test_vector_funcs.h | 35 | ||||
| -rw-r--r-- | src/vppinfra/test_vector_funcs_compress.c | 81 | ||||
| -rw-r--r-- | src/vppinfra/test_vector_funcs_mask_compare.c | 95 | ||||
| -rw-r--r-- | src/vppinfra/vector_funcs.h | 200 |
9 files changed, 496 insertions, 143 deletions
diff --git a/src/vlib/buffer_funcs.c b/src/vlib/buffer_funcs.c index fcef2d80f35..9ed1bac16be 100644 --- a/src/vlib/buffer_funcs.c +++ b/src/vlib/buffer_funcs.c @@ -6,123 +6,12 @@ #include <vlib/vlib.h> #include <vppinfra/vector_funcs.h> -typedef struct -{ - uword used_elts[VLIB_FRAME_SIZE / 64]; - u32 uword_offset; -} extract_data_t; - -static_always_inline u32 * -extract_unused_elts_x64 (u32 *elts, u16 *indices, u16 index, int n_left, - u64 *bmp, u32 *dst) -{ - u64 mask = 0; -#if defined(CLIB_HAVE_VEC128) - mask = clib_compare_u16_x64 (index, indices); - if (n_left == 64) - { - if (mask == ~0ULL) - { - clib_memcpy_u32 (dst, elts, 64); - *bmp = ~0ULL; - return dst + 64; - } - } - else - mask &= pow2_mask (n_left); - - *bmp |= mask; - -#if defined(CLIB_HAVE_VEC512_COMPRESS) - u32x16u *ev = (u32x16u *) elts; - for (int i = 0; i < 4; i++) - { - int cnt = _popcnt32 ((u16) mask); - u32x16_compress_store (ev[i], mask, dst); - dst += cnt; - mask >>= 16; - } - -#elif defined(CLIB_HAVE_VEC256_COMPRESS) - u32x8u *ev = (u32x8u *) elts; - for (int i = 0; i < 8; i++) - { - int cnt = _popcnt32 ((u8) mask); - u32x8_compress_store (ev[i], mask, dst); - dst += cnt; - mask >>= 8; - } -#elif defined(CLIB_HAVE_VEC256) - while (mask) - { - u16 bit = count_trailing_zeros (mask); - mask = clear_lowest_set_bit (mask); - dst++[0] = elts[bit]; - } -#else - while (mask) - { - u16 bit = count_trailing_zeros (mask); - mask ^= 1ULL << bit; - dst++[0] = elts[bit]; - } -#endif -#else - for (int i = 0; i < n_left; i++) - { - if (indices[i] == index) - { - dst++[0] = elts[i]; - mask |= 1ULL << i; - } - } - *bmp |= mask; -#endif - return dst; -} - -static_always_inline u32 -extract_unused_elts_by_index (extract_data_t *d, u32 *elts, u16 *indices, - u16 index, int n_left, u32 *dst) -{ - u32 *dst0 = dst; - u64 *bmp = d->used_elts; - while (n_left >= 64) - { - dst = extract_unused_elts_x64 (elts, indices, index, 64, bmp, dst); - - /* next */ - indices += 64; - elts += 64; - bmp++; - n_left -= 64; - } - - if (n_left) - dst = extract_unused_elts_x64 (elts, indices, index, n_left, bmp, dst); - - return dst - dst0; -} - static_always_inline u32 -find_first_unused_elt (extract_data_t *d) -{ - u64 *ue = d->used_elts + d->uword_offset; - - while (PREDICT_FALSE (ue[0] == ~0)) - { - ue++; - d->uword_offset++; - } - - return d->uword_offset * 64 + count_trailing_zeros (~ue[0]); -} - -static_always_inline u32 -enqueue_one (vlib_main_t *vm, vlib_node_runtime_t *node, extract_data_t *d, +enqueue_one (vlib_main_t *vm, vlib_node_runtime_t *node, u64 *used_elt_bmp, u16 next_index, u32 *buffers, u16 *nexts, u32 n_buffers, u32 n_left, u32 *tmp) { + u64 match_bmp[VLIB_FRAME_SIZE / 64]; vlib_frame_t *f; u32 n_extracted, n_free; u32 *to; @@ -138,8 +27,12 @@ enqueue_one (vlib_main_t *vm, vlib_node_runtime_t *node, extract_data_t *d, else to = tmp; - n_extracted = extract_unused_elts_by_index (d, buffers, nexts, next_index, - n_buffers, to); + clib_mask_compare_u16 (next_index, nexts, match_bmp, n_buffers); + + n_extracted = clib_compress_u32 (to, buffers, match_bmp, n_buffers); + + for (int i = 0; i < ARRAY_LEN (match_bmp); i++) + used_elt_bmp[i] |= match_bmp[i]; if (to != tmp) { @@ -183,18 +76,23 @@ CLIB_MULTIARCH_FN (vlib_buffer_enqueue_to_next_fn) while (count >= VLIB_FRAME_SIZE) { - extract_data_t d = {}; + u64 used_elt_bmp[VLIB_FRAME_SIZE / 64] = {}; n_left = VLIB_FRAME_SIZE; + u32 off = 0; next_index = nexts[0]; - n_left = enqueue_one (vm, node, &d, next_index, buffers, nexts, + n_left = enqueue_one (vm, node, used_elt_bmp, next_index, buffers, nexts, VLIB_FRAME_SIZE, n_left, tmp); while (n_left) { - next_index = nexts[find_first_unused_elt (&d)]; - n_left = enqueue_one (vm, node, &d, next_index, buffers, nexts, - VLIB_FRAME_SIZE, n_left, tmp); + while (PREDICT_FALSE (used_elt_bmp[off] == ~0)) + off++; + + next_index = + nexts[off * 64 + count_trailing_zeros (~used_elt_bmp[off])]; + n_left = enqueue_one (vm, node, used_elt_bmp, next_index, buffers, + nexts, VLIB_FRAME_SIZE, n_left, tmp); } buffers += VLIB_FRAME_SIZE; @@ -204,18 +102,23 @@ CLIB_MULTIARCH_FN (vlib_buffer_enqueue_to_next_fn) if (count) { - extract_data_t d = {}; + u64 used_elt_bmp[VLIB_FRAME_SIZE / 64] = {}; next_index = nexts[0]; n_left = count; + u32 off = 0; - n_left = enqueue_one (vm, node, &d, next_index, buffers, nexts, count, - n_left, tmp); + n_left = enqueue_one (vm, node, used_elt_bmp, next_index, buffers, nexts, + count, n_left, tmp); while (n_left) { - next_index = nexts[find_first_unused_elt (&d)]; - n_left = enqueue_one (vm, node, &d, next_index, buffers, nexts, - count, n_left, tmp); + while (PREDICT_FALSE (used_elt_bmp[off] == ~0)) + off++; + + next_index = + nexts[off * 64 + count_trailing_zeros (~used_elt_bmp[off])]; + n_left = enqueue_one (vm, node, used_elt_bmp, next_index, buffers, + nexts, count, n_left, tmp); } } } diff --git a/src/vppinfra/CMakeLists.txt b/src/vppinfra/CMakeLists.txt index dd3690bdbf3..6da1fa2a0a1 100644 --- a/src/vppinfra/CMakeLists.txt +++ b/src/vppinfra/CMakeLists.txt @@ -261,4 +261,22 @@ if(VPP_BUILD_VPPINFRA_TESTS) LINK_LIBRARIES vppinfra Threads::Threads ) endforeach() + +set(test_files + test_vector_funcs_compress.c + test_vector_funcs_mask_compare.c +) + +add_vpp_executable(test_vector_funcs + SOURCES + test_vector_funcs.c + ${test_files} + LINK_LIBRARIES vppinfra +) + +vpp_library_set_multiarch_sources(test_vector_funcs + SOURCES + ${test_files} +) + endif(VPP_BUILD_VPPINFRA_TESTS) diff --git a/src/vppinfra/cpu.c b/src/vppinfra/cpu.c index d2edc61cfbf..045d1f727f4 100644 --- a/src/vppinfra/cpu.c +++ b/src/vppinfra/cpu.c @@ -238,6 +238,18 @@ clib_get_current_numa_node () return node; } +__clib_export u8 * +format_march_variant (u8 *s, va_list *args) +{ + clib_march_variant_type_t t = va_arg (*args, clib_march_variant_type_t); + char *variants[] = { [0] = "default", +#define _(s, n) [CLIB_MARCH_VARIANT_TYPE_##s] = n, + foreach_march_variant +#undef _ + }; + return format (s, "%s", variants[t]); +} + /* * fd.io coding-style-patch-verification: ON * diff --git a/src/vppinfra/cpu.h b/src/vppinfra/cpu.h index c770b9c0a19..c1f2e9e8248 100644 --- a/src/vppinfra/cpu.h +++ b/src/vppinfra/cpu.h @@ -416,6 +416,7 @@ CLIB_MARCH_SFX(fn ## _march_constructor) (void) \ format_function_t format_cpu_uarch; format_function_t format_cpu_model_name; format_function_t format_cpu_flags; +format_function_t format_march_variant; /* * fd.io coding-style-patch-verification: ON diff --git a/src/vppinfra/test_vector_funcs.c b/src/vppinfra/test_vector_funcs.c new file mode 100644 index 00000000000..85f159a17c6 --- /dev/null +++ b/src/vppinfra/test_vector_funcs.c @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2021 Cisco Systems, Inc. + */ + +#include <vppinfra/format.h> +#include <vppinfra/test_vector_funcs.h> + +test_registration_t *test_registrations[CLIB_MARCH_TYPE_N_VARIANTS] = {}; + +int +main (int argc, char *argv[]) +{ + clib_mem_init (0, 64ULL << 20); + + for (int i = 0; i < CLIB_MARCH_TYPE_N_VARIANTS; i++) + { + test_registration_t *r = test_registrations[i]; + + if (r == 0) + continue; + + fformat (stdout, "\nMultiarch Variant: %U\n", format_march_variant, i); + fformat (stdout, + "-------------------------------------------------------\n"); + while (r) + { + clib_error_t *err; + err = (r->fn) (0); + fformat (stdout, "%-50s %s\n", r->name, err ? "FAIL" : "PASS"); + if (err) + { + clib_error_report (err); + fformat (stdout, "\n"); + } + + r = r->next; + } + } + + fformat (stdout, "\n"); + return 0; +} diff --git a/src/vppinfra/test_vector_funcs.h b/src/vppinfra/test_vector_funcs.h new file mode 100644 index 00000000000..bc499fb24e8 --- /dev/null +++ b/src/vppinfra/test_vector_funcs.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2021 Cisco Systems, Inc. + */ + +#ifndef included_test_test_h +#define included_test_test_h + +#include <vppinfra/cpu.h> + +typedef clib_error_t *(test_fn_t) (clib_error_t *); + +typedef struct test_registration_ +{ + char *name; + u8 multiarch : 1; + test_fn_t *fn; + struct test_registration_ *next; +} test_registration_t; + +extern test_registration_t *test_registrations[CLIB_MARCH_TYPE_N_VARIANTS]; + +#define __clib_test_fn static __clib_noinline __clib_section (".test_wrapper") + +#define REGISTER_TEST(x) \ + test_registration_t CLIB_MARCH_SFX (__test_##x); \ + static void __clib_constructor CLIB_MARCH_SFX (__test_registration_##x) ( \ + void) \ + { \ + test_registration_t *r = &CLIB_MARCH_SFX (__test_##x); \ + r->next = test_registrations[CLIB_MARCH_SFX (CLIB_MARCH_VARIANT_TYPE)]; \ + test_registrations[CLIB_MARCH_SFX (CLIB_MARCH_VARIANT_TYPE)] = r; \ + } \ + test_registration_t CLIB_MARCH_SFX (__test_##x) + +#endif diff --git a/src/vppinfra/test_vector_funcs_compress.c b/src/vppinfra/test_vector_funcs_compress.c new file mode 100644 index 00000000000..c0815601e45 --- /dev/null +++ b/src/vppinfra/test_vector_funcs_compress.c @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2021 Cisco Systems, Inc. + */ + +#include <vppinfra/format.h> +#include <vppinfra/vector_funcs.h> +#include <vppinfra/test_vector_funcs.h> + +__clib_test_fn u32 +clib_compress_u32_wrapper (u32 *dst, u32 *src, u64 *mask, u32 n_elts) +{ + return clib_compress_u32 (dst, src, mask, n_elts); +} + +typedef struct +{ + u64 mask[10]; + u32 n_elts; +} compress_test_t; + +static compress_test_t tests[] = { + { .mask = { 1 }, .n_elts = 1 }, + { .mask = { 2 }, .n_elts = 2 }, + { .mask = { 3 }, .n_elts = 2 }, + { .mask = { 0, 1 }, .n_elts = 66 }, + { .mask = { 0, 2 }, .n_elts = 69 }, + { .mask = { 0, 3 }, .n_elts = 66 }, + { .mask = { ~0ULL, ~0ULL, ~0ULL, ~0ULL }, .n_elts = 62 }, + { .mask = { ~0ULL, ~0ULL, ~0ULL, ~0ULL }, .n_elts = 255 }, + { .mask = { ~0ULL, 1, 1, ~0ULL }, .n_elts = 256 }, +}; + +static clib_error_t * +test_clib_compress_u32 (clib_error_t *err) +{ + u32 src[513]; + u32 dst[513]; + u32 i, j; + + for (i = 0; i < ARRAY_LEN (src); i++) + src[i] = i; + + for (i = 0; i < ARRAY_LEN (tests); i++) + { + compress_test_t *t = tests + i; + u32 *dp = dst; + u32 r; + + for (j = 0; j < ARRAY_LEN (dst); j++) + dst[j] = 0xa5a5a5a5; + + r = clib_compress_u32_wrapper (dst, src, t->mask, t->n_elts); + + for (j = 0; j < t->n_elts; j++) + { + if ((t->mask[j >> 6] & (1ULL << (j & 0x3f))) == 0) + continue; + + if (dp[0] != src[j]) + return clib_error_return (err, + "wrong data in testcase %u at " + "(dst[%u] = 0x%x, src[%u] = 0x%x)", + i, dp - dst, dp[0], j, src[j]); + dp++; + } + + if (dst[dp - dst + 1] != 0xa5a5a5a5) + return clib_error_return (err, "buffer overrun in testcase %u", i); + + if (dp - dst != r) + return clib_error_return (err, "wrong number of elts in testcase %u", + i); + } + + return err; +} + +REGISTER_TEST (clib_compress_u32) = { + .name = "clib_compress_u32", + .fn = test_clib_compress_u32, +}; diff --git a/src/vppinfra/test_vector_funcs_mask_compare.c b/src/vppinfra/test_vector_funcs_mask_compare.c new file mode 100644 index 00000000000..009f87712e4 --- /dev/null +++ b/src/vppinfra/test_vector_funcs_mask_compare.c @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2021 Cisco Systems, Inc. + */ + +#include <vppinfra/format.h> +#include <vppinfra/vector_funcs.h> +#include <vppinfra/test_vector_funcs.h> + +__clib_test_fn void +clib_mask_compare_u16_wrapper (u16 v, u16 *a, u64 *mask, u32 n_elts) +{ + clib_mask_compare_u16 (v, a, mask, n_elts); +} + +__clib_test_fn void +clib_mask_compare_u32_wrapper (u32 v, u32 *a, u64 *mask, u32 n_elts) +{ + clib_mask_compare_u32 (v, a, mask, n_elts); +} + +static clib_error_t * +test_clib_mask_compare_u16 (clib_error_t *err) +{ + u16 array[513]; + u64 mask[10]; + u32 i, j; + + for (i = 0; i < ARRAY_LEN (array); i++) + array[i] = i; + + for (i = 0; i < ARRAY_LEN (array); i++) + { + for (j = 0; j < ARRAY_LEN (mask); j++) + mask[j] = 0xa5a5a5a5a5a5a5a5; + + clib_mask_compare_u16_wrapper (i, array, mask, i + 1); + + for (j = 0; j < (i >> 6); j++) + { + if (mask[j]) + return clib_error_return (err, "mask at position %u not zero", j); + } + if (mask[j] != 1ULL << (i & 0x3f)) + return clib_error_return (err, + "mask at position %u is %lx, expected %lx", + j, mask[j], 1ULL << (i % 64)); + + if (mask[j + 1] != 0xa5a5a5a5a5a5a5a5) + return clib_error_return (err, "mask overrun at position %u", j + 1); + } + return err; +} + +REGISTER_TEST (clib_mask_compare_u16) = { + .name = "clib_mask_compare_u16", + .fn = test_clib_mask_compare_u16, +}; + +static clib_error_t * +test_clib_mask_compare_u32 (clib_error_t *err) +{ + u32 array[513]; + u64 mask[10]; + u32 i, j; + + for (i = 0; i < ARRAY_LEN (array); i++) + array[i] = i; + + for (i = 0; i < ARRAY_LEN (array); i++) + { + for (j = 0; j < ARRAY_LEN (mask); j++) + mask[j] = 0xa5a5a5a5a5a5a5a5; + + clib_mask_compare_u32_wrapper (i, array, mask, i + 1); + + for (j = 0; j < (i >> 6); j++) + { + if (mask[j]) + return clib_error_return (err, "mask at position %u not zero", j); + } + if (mask[j] != 1ULL << (i & 0x3f)) + return clib_error_return (err, + "mask at position %u is %lx, expected %lx", + j, mask[j], 1ULL << (i % 64)); + + if (mask[j + 1] != 0xa5a5a5a5a5a5a5a5) + return clib_error_return (err, "mask overrun at position %u", j + 1); + } + return err; +} + +REGISTER_TEST (clib_mask_compare_u32) = { + .name = "clib_mask_compare_u32", + .fn = test_clib_mask_compare_u32, +}; diff --git a/src/vppinfra/vector_funcs.h b/src/vppinfra/vector_funcs.h index 5c446a5d50d..fed1b5cc3d8 100644 --- a/src/vppinfra/vector_funcs.h +++ b/src/vppinfra/vector_funcs.h @@ -5,16 +5,10 @@ #ifndef included_vector_funcs_h #define included_vector_funcs_h #include <vppinfra/clib.h> - -/** \brief Compare 64 16-bit elemments with provied value and return bitmap - - @param v value to compare elements with - @param a array of 64 u16 elements - @return u64 bitmap where each bit represents result of comparison -*/ +#include <vppinfra/memcpy.h> static_always_inline u64 -clib_compare_u16_x64 (u16 v, u16 *a) +clib_mask_compare_u16_x64 (u16 v, u16 *a, u32 n_elts) { u64 mask = 0; #if defined(CLIB_HAVE_VEC512) @@ -42,14 +36,9 @@ clib_compare_u16_x64 (u16 v, u16 *a) of that bit represend element index. Finally vaddvq_u16() gives us sum of all elements of the vector which will give us u8 bitmap. */ - mask = ((u64) vaddvq_u16 ((av[0] == v8) & m) | - (u64) vaddvq_u16 ((av[1] == v8) & m) << 8 | - (u64) vaddvq_u16 ((av[2] == v8) & m) << 16 | - (u64) vaddvq_u16 ((av[3] == v8) & m) << 24 | - (u64) vaddvq_u16 ((av[4] == v8) & m) << 32 | - (u64) vaddvq_u16 ((av[5] == v8) & m) << 40 | - (u64) vaddvq_u16 ((av[6] == v8) & m) << 48 | - (u64) vaddvq_u16 ((av[7] == v8) & m) << 56); + for (int i = 0; i < 8; i++) + mask |= (u64) vaddvq_u16 ((av[i] == v8) & m) << (i * 8); + #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK) u16x8 v8 = u16x8_splat (v); u16x8u *av = (u16x8u *) a; @@ -58,11 +47,188 @@ clib_compare_u16_x64 (u16 v, u16 *a) (u64) i8x16_msb_mask (i8x16_pack (v8 == av[4], v8 == av[5])) << 32 | (u64) i8x16_msb_mask (i8x16_pack (v8 == av[6], v8 == av[7])) << 48); #else - for (int i = 0; i < 64; i++) + for (int i = 0; i < n_elts; i++) if (a[i] == v) mask |= 1ULL << i; #endif return mask; } +/** \brief Compare 16-bit elemments with provied value and return bitmap + + @param v value to compare elements with + @param a array of u16 elements + @param mask array of u64 where reuslting mask will be stored + @param n_elts number of elements in the array + @return none +*/ + +static_always_inline void +clib_mask_compare_u16 (u16 v, u16 *a, u64 *mask, u32 n_elts) +{ + while (n_elts >= 64) + { + mask++[0] = clib_mask_compare_u16_x64 (v, a, 64); + n_elts -= 64; + a += 64; + } + + if (PREDICT_TRUE (n_elts == 0)) + return; + + mask[0] = clib_mask_compare_u16_x64 (v, a, n_elts) & pow2_mask (n_elts); +} + +static_always_inline u64 +clib_mask_compare_u32_x64 (u32 v, u32 *a, u32 n_elts) +{ + u64 mask = 0; +#if defined(CLIB_HAVE_VEC512) + u32x16 v16 = u32x16_splat (v); + u32x16u *av = (u32x16u *) a; + mask = ((u64) u32x16_is_equal_mask (av[0], v16) | + (u64) u32x16_is_equal_mask (av[1], v16) << 16 | + (u64) u32x16_is_equal_mask (av[2], v16) << 32 | + (u64) u32x16_is_equal_mask (av[3], v16) << 48); +#elif defined(CLIB_HAVE_VEC256) + u32x8 v8 = u32x8_splat (v); + u32x8u *av = (u32x8u *) a; + u32x8 m = { 0, 4, 1, 5, 2, 6, 3, 7 }; + i8x32 c; + + c = i8x32_pack (i16x16_pack ((i32x8) (v8 == av[0]), (i32x8) (v8 == av[1])), + i16x16_pack ((i32x8) (v8 == av[2]), (i32x8) (v8 == av[3]))); + mask = i8x32_msb_mask ((i8x32) u32x8_permute ((u32x8) c, m)); + + c = i8x32_pack (i16x16_pack ((i32x8) (v8 == av[4]), (i32x8) (v8 == av[5])), + i16x16_pack ((i32x8) (v8 == av[6]), (i32x8) (v8 == av[7]))); + mask |= (u64) i8x32_msb_mask ((i8x32) u32x8_permute ((u32x8) c, m)) << 32; + +#elif defined(CLIB_HAVE_VEC128) && defined(__ARM_NEON) + u32x4 v4 = u32x4_splat (v); + u32x4 m = { 1, 2, 4, 8 }; + u32x4u *av = (u32x4u *) a; + + /* compare each u32 elemment with v4, result gives -1 in each element + of the resulting vector if comparison result is true. + Bitwise AND with m will give us one bit set for true result and offset + of that bit represend element index. Finally vaddvq_u32() gives us sum + of all elements of the vector which will give us u8 bitmap. */ + + for (int i = 0; i < 16; i++) + mask |= (u64) vaddvq_u32 ((av[i] == v4) & m) << (i * 4); + +#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK) + u32x4 v4 = u32x4_splat (v); + u32x4u *av = (u32x4u *) a; + + for (int i = 0; i < 4; i++) + { + i16x8 p1 = i16x8_pack (v4 == av[0], v4 == av[1]); + i16x8 p2 = i16x8_pack (v4 == av[2], v4 == av[3]); + mask |= (u64) i8x16_msb_mask (i8x16_pack (p1, p2)) << (i * 16); + av += 4; + } + +#else + for (int i = 0; i < n_elts; i++) + if (a[i] == v) + mask |= 1ULL << i; +#endif + return mask; +} + +/** \brief Compare 32-bit elemments with provied value and return bitmap + + @param v value to compare elements with + @param a array of u32 elements + @param mask array of u64 where reuslting mask will be stored + @param n_elts number of elements in the array + @return none +*/ + +static_always_inline void +clib_mask_compare_u32 (u32 v, u32 *a, u64 *bitmap, u32 n_elts) +{ + while (n_elts >= 64) + { + bitmap++[0] = clib_mask_compare_u32_x64 (v, a, 64); + n_elts -= 64; + a += 64; + } + + if (PREDICT_TRUE (n_elts == 0)) + return; + + bitmap[0] = clib_mask_compare_u32_x64 (v, a, n_elts) & pow2_mask (n_elts); +} + +static_always_inline u32 * +clib_compress_u32_x64 (u32 *dst, u32 *src, u64 mask) +{ +#if defined(CLIB_HAVE_VEC512_COMPRESS) + u32x16u *sv = (u32x16u *) src; + for (int i = 0; i < 4; i++) + { + int cnt = _popcnt32 ((u16) mask); + u32x16_compress_store (sv[i], mask, dst); + dst += cnt; + mask >>= 16; + } + +#elif defined(CLIB_HAVE_VEC256_COMPRESS) + u32x8u *sv = (u32x8u *) src; + for (int i = 0; i < 8; i++) + { + int cnt = _popcnt32 ((u8) mask); + u32x8_compress_store (sv[i], mask, dst); + dst += cnt; + mask >>= 8; + } +#else + while (mask) + { + u16 bit = count_trailing_zeros (mask); + mask = clear_lowest_set_bit (mask); + dst++[0] = src[bit]; + } +#endif + return dst; +} + +/** \brief Compare array of 32-bit elemments into destination array based on + * mask + + @param dst destination array of u32 elements + @param src source array of u32 elements + @param mask array of u64 values representing compress mask + @param n_elts number of elements in the source array + @return number of elements stored in destionation array +*/ + +static_always_inline u32 +clib_compress_u32 (u32 *dst, u32 *src, u64 *mask, u32 n_elts) +{ + u32 *dst0 = dst; + while (n_elts >= 64) + { + if (mask[0] == ~0ULL) + { + clib_memcpy_u32 (dst, src, 64); + dst += 64; + } + else + dst = clib_compress_u32_x64 (dst, src, mask[0]); + + mask++; + src += 64; + n_elts -= 64; + } + + if (PREDICT_TRUE (n_elts == 0)) + return dst - dst0; + + return clib_compress_u32_x64 (dst, src, mask[0] & pow2_mask (n_elts)) - dst0; +} + #endif |