// Copyright 2014 Google Inc. All Rights Reserved. // // Use of this source code is governed by a BSD-style license // that can be found in the COPYING file in the root of the source // tree. An additional intellectual property rights grant can be found // in the file PATENTS. All contributing project authors may // be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // NEON common code. #ifndef WEBP_DSP_NEON_H_ #define WEBP_DSP_NEON_H_ #include <arm_neon.h> #include "../dsp/dsp.h" // Right now, some intrinsics functions seem slower, so we disable them // everywhere except newer clang/gcc or aarch64 where the inline assembly is // incompatible. #if LOCAL_CLANG_PREREQ(3,8) || LOCAL_GCC_PREREQ(4,9) || defined(__aarch64__) #define WEBP_USE_INTRINSICS // use intrinsics when possible #endif #define INIT_VECTOR2(v, a, b) do { \ v.val[0] = a; \ v.val[1] = b; \ } while (0) #define INIT_VECTOR3(v, a, b, c) do { \ v.val[0] = a; \ v.val[1] = b; \ v.val[2] = c; \ } while (0) #define INIT_VECTOR4(v, a, b, c, d) do { \ v.val[0] = a; \ v.val[1] = b; \ v.val[2] = c; \ v.val[3] = d; \ } while (0) // if using intrinsics, this flag avoids some functions that make gcc-4.6.3 // crash ("internal compiler error: in immed_double_const, at emit-rtl."). // (probably similar to gcc.gnu.org/bugzilla/show_bug.cgi?id=48183) #if !(LOCAL_CLANG_PREREQ(3,8) || LOCAL_GCC_PREREQ(4,8) || defined(__aarch64__)) #define WORK_AROUND_GCC #endif static WEBP_INLINE int32x4x4_t Transpose4x4_NEON(const int32x4x4_t rows) { uint64x2x2_t row01, row23; row01.val[0] = vreinterpretq_u64_s32(rows.val[0]); row01.val[1] = vreinterpretq_u64_s32(rows.val[1]); row23.val[0] = vreinterpretq_u64_s32(rows.val[2]); row23.val[1] = vreinterpretq_u64_s32(rows.val[3]); // Transpose 64-bit values (there's no vswp equivalent) { const uint64x1_t row0h = vget_high_u64(row01.val[0]); const uint64x1_t row2l = vget_low_u64(row23.val[0]); const uint64x1_t row1h = vget_high_u64(row01.val[1]); const uint64x1_t row3l = vget_low_u64(row23.val[1]); row01.val[0] = vcombine_u64(vget_low_u64(row01.val[0]), row2l); row23.val[0] = vcombine_u64(row0h, vget_high_u64(row23.val[0])); row01.val[1] = vcombine_u64(vget_low_u64(row01.val[1]), row3l); row23.val[1] = vcombine_u64(row1h, vget_high_u64(row23.val[1])); } { const int32x4x2_t out01 = vtrnq_s32(vreinterpretq_s32_u64(row01.val[0]), vreinterpretq_s32_u64(row01.val[1])); const int32x4x2_t out23 = vtrnq_s32(vreinterpretq_s32_u64(row23.val[0]), vreinterpretq_s32_u64(row23.val[1])); int32x4x4_t out; out.val[0] = out01.val[0]; out.val[1] = out01.val[1]; out.val[2] = out23.val[0]; out.val[3] = out23.val[1]; return out; } } #if 0 // Useful debug macro. #include <stdio.h> #define PRINT_REG(REG, SIZE) do { \ int i; \ printf("%s \t[%d]: 0x", #REG, SIZE); \ if (SIZE == 8) { \ uint8_t _tmp[8]; \ vst1_u8(_tmp, (REG)); \ for (i = 0; i < 8; ++i) printf("%.2x ", _tmp[i]); \ } else if (SIZE == 16) { \ uint16_t _tmp[4]; \ vst1_u16(_tmp, (REG)); \ for (i = 0; i < 4; ++i) printf("%.4x ", _tmp[i]); \ } \ printf("\n"); \ } while (0) #endif #endif // WEBP_DSP_NEON_H_