/* SPDX-License-Identifier: MIT * * 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. * * Copyright: * 2020 Evan Nemerson */ #if !defined(SIMDE_ARM_NEON_CLZ_H) #define SIMDE_ARM_NEON_CLZ_H #include "types.h" HEDLEY_DIAGNOSTIC_PUSH SIMDE_DISABLE_UNWANTED_DIAGNOSTICS SIMDE_BEGIN_DECLS_ SIMDE_FUNCTION_ATTRIBUTES uint8_t simde_x_vclzb_u8(uint8_t a) { #if \ defined(SIMDE_BUILTIN_SUFFIX_8_) && \ ( \ SIMDE_BUILTIN_HAS_8_(clz) || \ HEDLEY_ARM_VERSION_CHECK(4,1,0) || \ HEDLEY_GCC_VERSION_CHECK(3,4,0) || \ HEDLEY_IBM_VERSION_CHECK(13,1,0) \ ) if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(r); return HEDLEY_STATIC_CAST(uint8_t, SIMDE_BUILTIN_8_(clz)(HEDLEY_STATIC_CAST(unsigned SIMDE_BUILTIN_TYPE_8_, a))); #else uint8_t r; uint8_t shift; if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(r); r = HEDLEY_STATIC_CAST(uint8_t, (a > UINT8_C(0x0F)) << 2); a >>= r; shift = HEDLEY_STATIC_CAST(uint8_t, (a > UINT8_C(0x03)) << 1); a >>= shift; r |= shift; r |= (a >> 1); return ((8 * sizeof(r)) - 1) - r; #endif } SIMDE_FUNCTION_ATTRIBUTES uint16_t simde_x_vclzh_u16(uint16_t a) { #if \ defined(SIMDE_BUILTIN_SUFFIX_16_) && \ ( \ SIMDE_BUILTIN_HAS_16_(clz) || \ HEDLEY_ARM_VERSION_CHECK(4,1,0) || \ HEDLEY_GCC_VERSION_CHECK(3,4,0) || \ HEDLEY_IBM_VERSION_CHECK(13,1,0) \ ) if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(r); return HEDLEY_STATIC_CAST(uint16_t, SIMDE_BUILTIN_16_(clz)(HEDLEY_STATIC_CAST(unsigned SIMDE_BUILTIN_TYPE_16_, a))); #else uint16_t r; uint16_t shift; if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(r); r = HEDLEY_STATIC_CAST(uint16_t, (a > UINT16_C(0x00FF)) << 3); a >>= r; shift = HEDLEY_STATIC_CAST(uint16_t, (a > UINT16_C(0x000F)) << 2); a >>= shift; r |= shift; shift = HEDLEY_STATIC_CAST(uint16_t, (a > UINT16_C(0x0003)) << 1); a >>= shift; r |= shift; r |= (a >> 1); return ((8 * sizeof(r)) - 1) - r; #endif } SIMDE_FUNCTION_ATTRIBUTES uint32_t simde_x_vclzs_u32(uint32_t a) { #if \ defined(SIMDE_BUILTIN_SUFFIX_32_) && \ ( \ SIMDE_BUILTIN_HAS_32_(clz) || \ HEDLEY_ARM_VERSION_CHECK(4,1,0) || \ HEDLEY_GCC_VERSION_CHECK(3,4,0) || \ HEDLEY_IBM_VERSION_CHECK(13,1,0) \ ) if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(a); return HEDLEY_STATIC_CAST(uint32_t, SIMDE_BUILTIN_32_(clz)(HEDLEY_STATIC_CAST(unsigned SIMDE_BUILTIN_TYPE_32_, a))); #else uint32_t r; uint32_t shift; if (HEDLEY_UNLIKELY(a == 0)) return 8 * sizeof(a); r = HEDLEY_STATIC_CAST(uint32_t, (a > UINT32_C(0xFFFF)) << 4); a >>= r; shift = HEDLEY_STATIC_CAST(uint32_t, (a > UINT32_C(0x00FF)) << 3); a >>= shift; r |= shift; shift = HEDLEY_STATIC_CAST(uint32_t, (a > UINT32_C(0x000F)) << 2); a >>= shift; r |= shift; shift = HEDLEY_STATIC_CAST(uint32_t, (a > UINT32_C(0x0003)) << 1); a >>= shift; r |= shift; r |= (a >> 1); return ((8 * sizeof(r)) - 1) - r; #endif } SIMDE_FUNCTION_ATTRIBUTES int8_t simde_x_vclzb_s8(int8_t a) { return HEDLEY_STATIC_CAST(int8_t, simde_x_vclzb_u8(HEDLEY_STATIC_CAST(uint8_t, a))); } SIMDE_FUNCTION_ATTRIBUTES int16_t simde_x_vclzh_s16(int16_t a) { return HEDLEY_STATIC_CAST(int16_t, simde_x_vclzh_u16(HEDLEY_STATIC_CAST(uint16_t, a))); } SIMDE_FUNCTION_ATTRIBUTES int32_t simde_x_vclzs_s32(int32_t a) { return HEDLEY_STATIC_CAST(int32_t, simde_x_vclzs_u32(HEDLEY_STATIC_CAST(uint32_t, a))); } SIMDE_FUNCTION_ATTRIBUTES simde_int8x8_t simde_vclz_s8(simde_int8x8_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_s8(a); #else simde_int8x8_private a_ = simde_int8x8_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzb_s8(a_.values[i]); } return simde_int8x8_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_s8 #define vclz_s8(a) simde_vclz_s8(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_int16x4_t simde_vclz_s16(simde_int16x4_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_s16(a); #else simde_int16x4_private a_ = simde_int16x4_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzh_s16(a_.values[i]); } return simde_int16x4_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_s16 #define vclz_s16(a) simde_vclz_s16(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_int32x2_t simde_vclz_s32(simde_int32x2_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_s32(a); #else simde_int32x2_private a_ = simde_int32x2_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzs_s32(a_.values[i]); } return simde_int32x2_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_s32 #define vclz_s32(a) simde_vclz_s32(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint8x8_t simde_vclz_u8(simde_uint8x8_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_u8(a); #else simde_uint8x8_private a_ = simde_uint8x8_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzb_u8(a_.values[i]); } return simde_uint8x8_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_u8 #define vclz_u8(a) simde_vclz_u8(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint16x4_t simde_vclz_u16(simde_uint16x4_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_u16(a); #else simde_uint16x4_private a_ = simde_uint16x4_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzh_u16(a_.values[i]); } return simde_uint16x4_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_u16 #define vclz_u16(a) simde_vclz_u16(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint32x2_t simde_vclz_u32(simde_uint32x2_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclz_u32(a); #else simde_uint32x2_private a_ = simde_uint32x2_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzs_u32(a_.values[i]); } return simde_uint32x2_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclz_u32 #define vclz_u32(a) simde_vclz_u32(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_int8x16_t simde_vclzq_s8(simde_int8x16_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_s8(a); #else simde_int8x16_private a_ = simde_int8x16_to_private(a), r_; #if defined(SIMDE_X86_GFNI_NATIVE) /* https://gist.github.com/animetosho/6cb732ccb5ecd86675ca0a442b3c0622 */ a_.m128i = _mm_gf2p8affine_epi64_epi8(a_.m128i, _mm_set_epi32(HEDLEY_STATIC_CAST(int32_t, 0x80402010), HEDLEY_STATIC_CAST(int32_t, 0x08040201), HEDLEY_STATIC_CAST(int32_t, 0x80402010), HEDLEY_STATIC_CAST(int32_t, 0x08040201)), 0); a_.m128i = _mm_andnot_si128(_mm_add_epi8(a_.m128i, _mm_set1_epi8(HEDLEY_STATIC_CAST(int8_t, 0xff))), a_.m128i); r_.m128i = _mm_gf2p8affine_epi64_epi8(a_.m128i, _mm_set_epi32(HEDLEY_STATIC_CAST(int32_t, 0xaaccf0ff), 0, HEDLEY_STATIC_CAST(int32_t, 0xaaccf0ff), 0), 8); #else for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzb_s8(a_.values[i]); } #endif return simde_int8x16_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_s8 #define vclzq_s8(a) simde_vclzq_s8(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_int16x8_t simde_vclzq_s16(simde_int16x8_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_s16(a); #else simde_int16x8_private a_ = simde_int16x8_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzh_s16(a_.values[i]); } return simde_int16x8_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_s16 #define vclzq_s16(a) simde_vclzq_s16(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_int32x4_t simde_vclzq_s32(simde_int32x4_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_s32(a); #else simde_int32x4_private a_ = simde_int32x4_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzs_s32(a_.values[i]); } return simde_int32x4_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_s32 #define vclzq_s32(a) simde_vclzq_s32(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint8x16_t simde_vclzq_u8(simde_uint8x16_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_u8(a); #else simde_uint8x16_private a_ = simde_uint8x16_to_private(a), r_; #if defined(SIMDE_X86_GFNI_NATIVE) a_.m128i = _mm_gf2p8affine_epi64_epi8(a_.m128i, _mm_set_epi32(HEDLEY_STATIC_CAST(int32_t, 0x80402010), HEDLEY_STATIC_CAST(int32_t, 0x08040201), HEDLEY_STATIC_CAST(int32_t, 0x80402010), HEDLEY_STATIC_CAST(int32_t, 0x08040201)), 0); a_.m128i = _mm_andnot_si128(_mm_add_epi8(a_.m128i, _mm_set1_epi8(HEDLEY_STATIC_CAST(int8_t, 0xff))), a_.m128i); r_.m128i = _mm_gf2p8affine_epi64_epi8(a_.m128i, _mm_set_epi32(HEDLEY_STATIC_CAST(int32_t, 0xaaccf0ff), 0, HEDLEY_STATIC_CAST(int32_t, 0xaaccf0ff), 0), 8); #else for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzb_u8(a_.values[i]); } #endif return simde_uint8x16_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_u8 #define vclzq_u8(a) simde_vclzq_u8(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint16x8_t simde_vclzq_u16(simde_uint16x8_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_u16(a); #else simde_uint16x8_private a_ = simde_uint16x8_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzh_u16(a_.values[i]); } return simde_uint16x8_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_u16 #define vclzq_u16(a) simde_vclzq_u16(a) #endif SIMDE_FUNCTION_ATTRIBUTES simde_uint32x4_t simde_vclzq_u32(simde_uint32x4_t a) { #if defined(SIMDE_ARM_NEON_A32V7_NATIVE) return vclzq_u32(a); #else simde_uint32x4_private a_ = simde_uint32x4_to_private(a), r_; for (size_t i = 0 ; i < (sizeof(r_.values) / sizeof(r_.values[0])) ; i++) { r_.values[i] = simde_x_vclzs_u32(a_.values[i]); } return simde_uint32x4_from_private(r_); #endif } #if defined(SIMDE_ARM_NEON_A32V7_ENABLE_NATIVE_ALIASES) #undef vclzq_u32 #define vclzq_u32(a) simde_vclzq_u32(a) #endif SIMDE_END_DECLS_ HEDLEY_DIAGNOSTIC_POP #endif /* !defined(SIMDE_ARM_NEON_CLZ_H) */