/* * jidctfst-neon.c - fast integer IDCT (Arm Neon) * * Copyright (C) 2020, Arm Limited. All Rights Reserved. * * This software is provided 'as-is', without any express or implied * warranty. In no event will the authors be held liable for any damages * arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, * including commercial applications, and to alter it and redistribute it * freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software * in a product, an acknowledgment in the product documentation would be * appreciated but is not required. * 2. Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * 3. This notice may not be removed or altered from any source distribution. */ #define JPEG_INTERNALS #include "../../jinclude.h" #include "../../jpeglib.h" #include "../../jsimd.h" #include "../../jdct.h" #include "../../jsimddct.h" #include "../jsimd.h" #include "align.h" #include /* jsimd_idct_ifast_neon() performs dequantization and a fast, not so accurate * inverse DCT (Discrete Cosine Transform) on one block of coefficients. It * uses the same calculations and produces exactly the same output as IJG's * original jpeg_idct_ifast() function, which can be found in jidctfst.c. * * Scaled integer constants are used to avoid floating-point arithmetic: * 0.082392200 = 2688 * 2^-15 * 0.414213562 = 13568 * 2^-15 * 0.847759065 = 27776 * 2^-15 * 0.613125930 = 20096 * 2^-15 * * See jidctfst.c for further details of the IDCT algorithm. Where possible, * the variable names and comments here in jsimd_idct_ifast_neon() match up * with those in jpeg_idct_ifast(). */ #define PASS1_BITS 2 #define F_0_082 2688 #define F_0_414 13568 #define F_0_847 27776 #define F_0_613 20096 ALIGN(16) static const int16_t jsimd_idct_ifast_neon_consts[] = { F_0_082, F_0_414, F_0_847, F_0_613 }; void jsimd_idct_ifast_neon(void *dct_table, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col) { IFAST_MULT_TYPE *quantptr = dct_table; /* Load DCT coefficients. */ int16x8_t row0 = vld1q_s16(coef_block + 0 * DCTSIZE); int16x8_t row1 = vld1q_s16(coef_block + 1 * DCTSIZE); int16x8_t row2 = vld1q_s16(coef_block + 2 * DCTSIZE); int16x8_t row3 = vld1q_s16(coef_block + 3 * DCTSIZE); int16x8_t row4 = vld1q_s16(coef_block + 4 * DCTSIZE); int16x8_t row5 = vld1q_s16(coef_block + 5 * DCTSIZE); int16x8_t row6 = vld1q_s16(coef_block + 6 * DCTSIZE); int16x8_t row7 = vld1q_s16(coef_block + 7 * DCTSIZE); /* Load quantization table values for DC coefficients. */ int16x8_t quant_row0 = vld1q_s16(quantptr + 0 * DCTSIZE); /* Dequantize DC coefficients. */ row0 = vmulq_s16(row0, quant_row0); /* Construct bitmap to test if all AC coefficients are 0. */ int16x8_t bitmap = vorrq_s16(row1, row2); bitmap = vorrq_s16(bitmap, row3); bitmap = vorrq_s16(bitmap, row4); bitmap = vorrq_s16(bitmap, row5); bitmap = vorrq_s16(bitmap, row6); bitmap = vorrq_s16(bitmap, row7); int64_t left_ac_bitmap = vgetq_lane_s64(vreinterpretq_s64_s16(bitmap), 0); int64_t right_ac_bitmap = vgetq_lane_s64(vreinterpretq_s64_s16(bitmap), 1); /* Load IDCT conversion constants. */ const int16x4_t consts = vld1_s16(jsimd_idct_ifast_neon_consts); if (left_ac_bitmap == 0 && right_ac_bitmap == 0) { /* All AC coefficients are zero. * Compute DC values and duplicate into vectors. */ int16x8_t dcval = row0; row1 = dcval; row2 = dcval; row3 = dcval; row4 = dcval; row5 = dcval; row6 = dcval; row7 = dcval; } else if (left_ac_bitmap == 0) { /* AC coefficients are zero for columns 0, 1, 2, and 3. * Use DC values for these columns. */ int16x4_t dcval = vget_low_s16(row0); /* Commence regular fast IDCT computation for columns 4, 5, 6, and 7. */ /* Load quantization table. */ int16x4_t quant_row1 = vld1_s16(quantptr + 1 * DCTSIZE + 4); int16x4_t quant_row2 = vld1_s16(quantptr + 2 * DCTSIZE + 4); int16x4_t quant_row3 = vld1_s16(quantptr + 3 * DCTSIZE + 4); int16x4_t quant_row4 = vld1_s16(quantptr + 4 * DCTSIZE + 4); int16x4_t quant_row5 = vld1_s16(quantptr + 5 * DCTSIZE + 4); int16x4_t quant_row6 = vld1_s16(quantptr + 6 * DCTSIZE + 4); int16x4_t quant_row7 = vld1_s16(quantptr + 7 * DCTSIZE + 4); /* Even part: dequantize DCT coefficients. */ int16x4_t tmp0 = vget_high_s16(row0); int16x4_t tmp1 = vmul_s16(vget_high_s16(row2), quant_row2); int16x4_t tmp2 = vmul_s16(vget_high_s16(row4), quant_row4); int16x4_t tmp3 = vmul_s16(vget_high_s16(row6), quant_row6); int16x4_t tmp10 = vadd_s16(tmp0, tmp2); /* phase 3 */ int16x4_t tmp11 = vsub_s16(tmp0, tmp2); int16x4_t tmp13 = vadd_s16(tmp1, tmp3); /* phases 5-3 */ int16x4_t tmp1_sub_tmp3 = vsub_s16(tmp1, tmp3); int16x4_t tmp12 = vqdmulh_lane_s16(tmp1_sub_tmp3, consts, 1); tmp12 = vadd_s16(tmp12, tmp1_sub_tmp3); tmp12 = vsub_s16(tmp12, tmp13); tmp0 = vadd_s16(tmp10, tmp13); /* phase 2 */ tmp3 = vsub_s16(tmp10, tmp13); tmp1 = vadd_s16(tmp11, tmp12); tmp2 = vsub_s16(tmp11, tmp12); /* Odd part: dequantize DCT coefficients. */ int16x4_t tmp4 = vmul_s16(vget_high_s16(row1), quant_row1); int16x4_t tmp5 = vmul_s16(vget_high_s16(row3), quant_row3); int16x4_t tmp6 = vmul_s16(vget_high_s16(row5), quant_row5); int16x4_t tmp7 = vmul_s16(vget_high_s16(row7), quant_row7); int16x4_t z13 = vadd_s16(tmp6, tmp5); /* phase 6 */ int16x4_t neg_z10 = vsub_s16(tmp5, tmp6); int16x4_t z11 = vadd_s16(tmp4, tmp7); int16x4_t z12 = vsub_s16(tmp4, tmp7); tmp7 = vadd_s16(z11, z13); /* phase 5 */ int16x4_t z11_sub_z13 = vsub_s16(z11, z13); tmp11 = vqdmulh_lane_s16(z11_sub_z13, consts, 1); tmp11 = vadd_s16(tmp11, z11_sub_z13); int16x4_t z10_add_z12 = vsub_s16(z12, neg_z10); int16x4_t z5 = vqdmulh_lane_s16(z10_add_z12, consts, 2); z5 = vadd_s16(z5, z10_add_z12); tmp10 = vqdmulh_lane_s16(z12, consts, 0); tmp10 = vadd_s16(tmp10, z12); tmp10 = vsub_s16(tmp10, z5); tmp12 = vqdmulh_lane_s16(neg_z10, consts, 3); tmp12 = vadd_s16(tmp12, vadd_s16(neg_z10, neg_z10)); tmp12 = vadd_s16(tmp12, z5); tmp6 = vsub_s16(tmp12, tmp7); /* phase 2 */ tmp5 = vsub_s16(tmp11, tmp6); tmp4 = vadd_s16(tmp10, tmp5); row0 = vcombine_s16(dcval, vadd_s16(tmp0, tmp7)); row7 = vcombine_s16(dcval, vsub_s16(tmp0, tmp7)); row1 = vcombine_s16(dcval, vadd_s16(tmp1, tmp6)); row6 = vcombine_s16(dcval, vsub_s16(tmp1, tmp6)); row2 = vcombine_s16(dcval, vadd_s16(tmp2, tmp5)); row5 = vcombine_s16(dcval, vsub_s16(tmp2, tmp5)); row4 = vcombine_s16(dcval, vadd_s16(tmp3, tmp4)); row3 = vcombine_s16(dcval, vsub_s16(tmp3, tmp4)); } else if (right_ac_bitmap == 0) { /* AC coefficients are zero for columns 4, 5, 6, and 7. * Use DC values for these columns. */ int16x4_t dcval = vget_high_s16(row0); /* Commence regular fast IDCT computation for columns 0, 1, 2, and 3. */ /* Load quantization table. */ int16x4_t quant_row1 = vld1_s16(quantptr + 1 * DCTSIZE); int16x4_t quant_row2 = vld1_s16(quantptr + 2 * DCTSIZE); int16x4_t quant_row3 = vld1_s16(quantptr + 3 * DCTSIZE); int16x4_t quant_row4 = vld1_s16(quantptr + 4 * DCTSIZE); int16x4_t quant_row5 = vld1_s16(quantptr + 5 * DCTSIZE); int16x4_t quant_row6 = vld1_s16(quantptr + 6 * DCTSIZE); int16x4_t quant_row7 = vld1_s16(quantptr + 7 * DCTSIZE); /* Even part: dequantize DCT coefficients. */ int16x4_t tmp0 = vget_low_s16(row0); int16x4_t tmp1 = vmul_s16(vget_low_s16(row2), quant_row2); int16x4_t tmp2 = vmul_s16(vget_low_s16(row4), quant_row4); int16x4_t tmp3 = vmul_s16(vget_low_s16(row6), quant_row6); int16x4_t tmp10 = vadd_s16(tmp0, tmp2); /* phase 3 */ int16x4_t tmp11 = vsub_s16(tmp0, tmp2); int16x4_t tmp13 = vadd_s16(tmp1, tmp3); /* phases 5-3 */ int16x4_t tmp1_sub_tmp3 = vsub_s16(tmp1, tmp3); int16x4_t tmp12 = vqdmulh_lane_s16(tmp1_sub_tmp3, consts, 1); tmp12 = vadd_s16(tmp12, tmp1_sub_tmp3); tmp12 = vsub_s16(tmp12, tmp13); tmp0 = vadd_s16(tmp10, tmp13); /* phase 2 */ tmp3 = vsub_s16(tmp10, tmp13); tmp1 = vadd_s16(tmp11, tmp12); tmp2 = vsub_s16(tmp11, tmp12); /* Odd part: dequantize DCT coefficients. */ int16x4_t tmp4 = vmul_s16(vget_low_s16(row1), quant_row1); int16x4_t tmp5 = vmul_s16(vget_low_s16(row3), quant_row3); int16x4_t tmp6 = vmul_s16(vget_low_s16(row5), quant_row5); int16x4_t tmp7 = vmul_s16(vget_low_s16(row7), quant_row7); int16x4_t z13 = vadd_s16(tmp6, tmp5); /* phase 6 */ int16x4_t neg_z10 = vsub_s16(tmp5, tmp6); int16x4_t z11 = vadd_s16(tmp4, tmp7); int16x4_t z12 = vsub_s16(tmp4, tmp7); tmp7 = vadd_s16(z11, z13); /* phase 5 */ int16x4_t z11_sub_z13 = vsub_s16(z11, z13); tmp11 = vqdmulh_lane_s16(z11_sub_z13, consts, 1); tmp11 = vadd_s16(tmp11, z11_sub_z13); int16x4_t z10_add_z12 = vsub_s16(z12, neg_z10); int16x4_t z5 = vqdmulh_lane_s16(z10_add_z12, consts, 2); z5 = vadd_s16(z5, z10_add_z12); tmp10 = vqdmulh_lane_s16(z12, consts, 0); tmp10 = vadd_s16(tmp10, z12); tmp10 = vsub_s16(tmp10, z5); tmp12 = vqdmulh_lane_s16(neg_z10, consts, 3); tmp12 = vadd_s16(tmp12, vadd_s16(neg_z10, neg_z10)); tmp12 = vadd_s16(tmp12, z5); tmp6 = vsub_s16(tmp12, tmp7); /* phase 2 */ tmp5 = vsub_s16(tmp11, tmp6); tmp4 = vadd_s16(tmp10, tmp5); row0 = vcombine_s16(vadd_s16(tmp0, tmp7), dcval); row7 = vcombine_s16(vsub_s16(tmp0, tmp7), dcval); row1 = vcombine_s16(vadd_s16(tmp1, tmp6), dcval); row6 = vcombine_s16(vsub_s16(tmp1, tmp6), dcval); row2 = vcombine_s16(vadd_s16(tmp2, tmp5), dcval); row5 = vcombine_s16(vsub_s16(tmp2, tmp5), dcval); row4 = vcombine_s16(vadd_s16(tmp3, tmp4), dcval); row3 = vcombine_s16(vsub_s16(tmp3, tmp4), dcval); } else { /* Some AC coefficients are non-zero; full IDCT calculation required. */ /* Load quantization table. */ int16x8_t quant_row1 = vld1q_s16(quantptr + 1 * DCTSIZE); int16x8_t quant_row2 = vld1q_s16(quantptr + 2 * DCTSIZE); int16x8_t quant_row3 = vld1q_s16(quantptr + 3 * DCTSIZE); int16x8_t quant_row4 = vld1q_s16(quantptr + 4 * DCTSIZE); int16x8_t quant_row5 = vld1q_s16(quantptr + 5 * DCTSIZE); int16x8_t quant_row6 = vld1q_s16(quantptr + 6 * DCTSIZE); int16x8_t quant_row7 = vld1q_s16(quantptr + 7 * DCTSIZE); /* Even part: dequantize DCT coefficients. */ int16x8_t tmp0 = row0; int16x8_t tmp1 = vmulq_s16(row2, quant_row2); int16x8_t tmp2 = vmulq_s16(row4, quant_row4); int16x8_t tmp3 = vmulq_s16(row6, quant_row6); int16x8_t tmp10 = vaddq_s16(tmp0, tmp2); /* phase 3 */ int16x8_t tmp11 = vsubq_s16(tmp0, tmp2); int16x8_t tmp13 = vaddq_s16(tmp1, tmp3); /* phases 5-3 */ int16x8_t tmp1_sub_tmp3 = vsubq_s16(tmp1, tmp3); int16x8_t tmp12 = vqdmulhq_lane_s16(tmp1_sub_tmp3, consts, 1); tmp12 = vaddq_s16(tmp12, tmp1_sub_tmp3); tmp12 = vsubq_s16(tmp12, tmp13); tmp0 = vaddq_s16(tmp10, tmp13); /* phase 2 */ tmp3 = vsubq_s16(tmp10, tmp13); tmp1 = vaddq_s16(tmp11, tmp12); tmp2 = vsubq_s16(tmp11, tmp12); /* Odd part: dequantize DCT coefficients. */ int16x8_t tmp4 = vmulq_s16(row1, quant_row1); int16x8_t tmp5 = vmulq_s16(row3, quant_row3); int16x8_t tmp6 = vmulq_s16(row5, quant_row5); int16x8_t tmp7 = vmulq_s16(row7, quant_row7); int16x8_t z13 = vaddq_s16(tmp6, tmp5); /* phase 6 */ int16x8_t neg_z10 = vsubq_s16(tmp5, tmp6); int16x8_t z11 = vaddq_s16(tmp4, tmp7); int16x8_t z12 = vsubq_s16(tmp4, tmp7); tmp7 = vaddq_s16(z11, z13); /* phase 5 */ int16x8_t z11_sub_z13 = vsubq_s16(z11, z13); tmp11 = vqdmulhq_lane_s16(z11_sub_z13, consts, 1); tmp11 = vaddq_s16(tmp11, z11_sub_z13); int16x8_t z10_add_z12 = vsubq_s16(z12, neg_z10); int16x8_t z5 = vqdmulhq_lane_s16(z10_add_z12, consts, 2); z5 = vaddq_s16(z5, z10_add_z12); tmp10 = vqdmulhq_lane_s16(z12, consts, 0); tmp10 = vaddq_s16(tmp10, z12); tmp10 = vsubq_s16(tmp10, z5); tmp12 = vqdmulhq_lane_s16(neg_z10, consts, 3); tmp12 = vaddq_s16(tmp12, vaddq_s16(neg_z10, neg_z10)); tmp12 = vaddq_s16(tmp12, z5); tmp6 = vsubq_s16(tmp12, tmp7); /* phase 2 */ tmp5 = vsubq_s16(tmp11, tmp6); tmp4 = vaddq_s16(tmp10, tmp5); row0 = vaddq_s16(tmp0, tmp7); row7 = vsubq_s16(tmp0, tmp7); row1 = vaddq_s16(tmp1, tmp6); row6 = vsubq_s16(tmp1, tmp6); row2 = vaddq_s16(tmp2, tmp5); row5 = vsubq_s16(tmp2, tmp5); row4 = vaddq_s16(tmp3, tmp4); row3 = vsubq_s16(tmp3, tmp4); } /* Transpose rows to work on columns in pass 2. */ int16x8x2_t rows_01 = vtrnq_s16(row0, row1); int16x8x2_t rows_23 = vtrnq_s16(row2, row3); int16x8x2_t rows_45 = vtrnq_s16(row4, row5); int16x8x2_t rows_67 = vtrnq_s16(row6, row7); int32x4x2_t rows_0145_l = vtrnq_s32(vreinterpretq_s32_s16(rows_01.val[0]), vreinterpretq_s32_s16(rows_45.val[0])); int32x4x2_t rows_0145_h = vtrnq_s32(vreinterpretq_s32_s16(rows_01.val[1]), vreinterpretq_s32_s16(rows_45.val[1])); int32x4x2_t rows_2367_l = vtrnq_s32(vreinterpretq_s32_s16(rows_23.val[0]), vreinterpretq_s32_s16(rows_67.val[0])); int32x4x2_t rows_2367_h = vtrnq_s32(vreinterpretq_s32_s16(rows_23.val[1]), vreinterpretq_s32_s16(rows_67.val[1])); int32x4x2_t cols_04 = vzipq_s32(rows_0145_l.val[0], rows_2367_l.val[0]); int32x4x2_t cols_15 = vzipq_s32(rows_0145_h.val[0], rows_2367_h.val[0]); int32x4x2_t cols_26 = vzipq_s32(rows_0145_l.val[1], rows_2367_l.val[1]); int32x4x2_t cols_37 = vzipq_s32(rows_0145_h.val[1], rows_2367_h.val[1]); int16x8_t col0 = vreinterpretq_s16_s32(cols_04.val[0]); int16x8_t col1 = vreinterpretq_s16_s32(cols_15.val[0]); int16x8_t col2 = vreinterpretq_s16_s32(cols_26.val[0]); int16x8_t col3 = vreinterpretq_s16_s32(cols_37.val[0]); int16x8_t col4 = vreinterpretq_s16_s32(cols_04.val[1]); int16x8_t col5 = vreinterpretq_s16_s32(cols_15.val[1]); int16x8_t col6 = vreinterpretq_s16_s32(cols_26.val[1]); int16x8_t col7 = vreinterpretq_s16_s32(cols_37.val[1]); /* 1-D IDCT, pass 2 */ /* Even part */ int16x8_t tmp10 = vaddq_s16(col0, col4); int16x8_t tmp11 = vsubq_s16(col0, col4); int16x8_t tmp13 = vaddq_s16(col2, col6); int16x8_t col2_sub_col6 = vsubq_s16(col2, col6); int16x8_t tmp12 = vqdmulhq_lane_s16(col2_sub_col6, consts, 1); tmp12 = vaddq_s16(tmp12, col2_sub_col6); tmp12 = vsubq_s16(tmp12, tmp13); int16x8_t tmp0 = vaddq_s16(tmp10, tmp13); int16x8_t tmp3 = vsubq_s16(tmp10, tmp13); int16x8_t tmp1 = vaddq_s16(tmp11, tmp12); int16x8_t tmp2 = vsubq_s16(tmp11, tmp12); /* Odd part */ int16x8_t z13 = vaddq_s16(col5, col3); int16x8_t neg_z10 = vsubq_s16(col3, col5); int16x8_t z11 = vaddq_s16(col1, col7); int16x8_t z12 = vsubq_s16(col1, col7); int16x8_t tmp7 = vaddq_s16(z11, z13); /* phase 5 */ int16x8_t z11_sub_z13 = vsubq_s16(z11, z13); tmp11 = vqdmulhq_lane_s16(z11_sub_z13, consts, 1); tmp11 = vaddq_s16(tmp11, z11_sub_z13); int16x8_t z10_add_z12 = vsubq_s16(z12, neg_z10); int16x8_t z5 = vqdmulhq_lane_s16(z10_add_z12, consts, 2); z5 = vaddq_s16(z5, z10_add_z12); tmp10 = vqdmulhq_lane_s16(z12, consts, 0); tmp10 = vaddq_s16(tmp10, z12); tmp10 = vsubq_s16(tmp10, z5); tmp12 = vqdmulhq_lane_s16(neg_z10, consts, 3); tmp12 = vaddq_s16(tmp12, vaddq_s16(neg_z10, neg_z10)); tmp12 = vaddq_s16(tmp12, z5); int16x8_t tmp6 = vsubq_s16(tmp12, tmp7); /* phase 2 */ int16x8_t tmp5 = vsubq_s16(tmp11, tmp6); int16x8_t tmp4 = vaddq_s16(tmp10, tmp5); col0 = vaddq_s16(tmp0, tmp7); col7 = vsubq_s16(tmp0, tmp7); col1 = vaddq_s16(tmp1, tmp6); col6 = vsubq_s16(tmp1, tmp6); col2 = vaddq_s16(tmp2, tmp5); col5 = vsubq_s16(tmp2, tmp5); col4 = vaddq_s16(tmp3, tmp4); col3 = vsubq_s16(tmp3, tmp4); /* Scale down by a factor of 8, narrowing to 8-bit. */ int8x16_t cols_01_s8 = vcombine_s8(vqshrn_n_s16(col0, PASS1_BITS + 3), vqshrn_n_s16(col1, PASS1_BITS + 3)); int8x16_t cols_45_s8 = vcombine_s8(vqshrn_n_s16(col4, PASS1_BITS + 3), vqshrn_n_s16(col5, PASS1_BITS + 3)); int8x16_t cols_23_s8 = vcombine_s8(vqshrn_n_s16(col2, PASS1_BITS + 3), vqshrn_n_s16(col3, PASS1_BITS + 3)); int8x16_t cols_67_s8 = vcombine_s8(vqshrn_n_s16(col6, PASS1_BITS + 3), vqshrn_n_s16(col7, PASS1_BITS + 3)); /* Clamp to range [0-255]. */ uint8x16_t cols_01 = vreinterpretq_u8_s8 (vaddq_s8(cols_01_s8, vreinterpretq_s8_u8(vdupq_n_u8(CENTERJSAMPLE)))); uint8x16_t cols_45 = vreinterpretq_u8_s8 (vaddq_s8(cols_45_s8, vreinterpretq_s8_u8(vdupq_n_u8(CENTERJSAMPLE)))); uint8x16_t cols_23 = vreinterpretq_u8_s8 (vaddq_s8(cols_23_s8, vreinterpretq_s8_u8(vdupq_n_u8(CENTERJSAMPLE)))); uint8x16_t cols_67 = vreinterpretq_u8_s8 (vaddq_s8(cols_67_s8, vreinterpretq_s8_u8(vdupq_n_u8(CENTERJSAMPLE)))); /* Transpose block to prepare for store. */ uint32x4x2_t cols_0415 = vzipq_u32(vreinterpretq_u32_u8(cols_01), vreinterpretq_u32_u8(cols_45)); uint32x4x2_t cols_2637 = vzipq_u32(vreinterpretq_u32_u8(cols_23), vreinterpretq_u32_u8(cols_67)); uint8x16x2_t cols_0145 = vtrnq_u8(vreinterpretq_u8_u32(cols_0415.val[0]), vreinterpretq_u8_u32(cols_0415.val[1])); uint8x16x2_t cols_2367 = vtrnq_u8(vreinterpretq_u8_u32(cols_2637.val[0]), vreinterpretq_u8_u32(cols_2637.val[1])); uint16x8x2_t rows_0426 = vtrnq_u16(vreinterpretq_u16_u8(cols_0145.val[0]), vreinterpretq_u16_u8(cols_2367.val[0])); uint16x8x2_t rows_1537 = vtrnq_u16(vreinterpretq_u16_u8(cols_0145.val[1]), vreinterpretq_u16_u8(cols_2367.val[1])); uint8x16_t rows_04 = vreinterpretq_u8_u16(rows_0426.val[0]); uint8x16_t rows_15 = vreinterpretq_u8_u16(rows_1537.val[0]); uint8x16_t rows_26 = vreinterpretq_u8_u16(rows_0426.val[1]); uint8x16_t rows_37 = vreinterpretq_u8_u16(rows_1537.val[1]); JSAMPROW outptr0 = output_buf[0] + output_col; JSAMPROW outptr1 = output_buf[1] + output_col; JSAMPROW outptr2 = output_buf[2] + output_col; JSAMPROW outptr3 = output_buf[3] + output_col; JSAMPROW outptr4 = output_buf[4] + output_col; JSAMPROW outptr5 = output_buf[5] + output_col; JSAMPROW outptr6 = output_buf[6] + output_col; JSAMPROW outptr7 = output_buf[7] + output_col; /* Store DCT block to memory. */ vst1q_lane_u64((uint64_t *)outptr0, vreinterpretq_u64_u8(rows_04), 0); vst1q_lane_u64((uint64_t *)outptr1, vreinterpretq_u64_u8(rows_15), 0); vst1q_lane_u64((uint64_t *)outptr2, vreinterpretq_u64_u8(rows_26), 0); vst1q_lane_u64((uint64_t *)outptr3, vreinterpretq_u64_u8(rows_37), 0); vst1q_lane_u64((uint64_t *)outptr4, vreinterpretq_u64_u8(rows_04), 1); vst1q_lane_u64((uint64_t *)outptr5, vreinterpretq_u64_u8(rows_15), 1); vst1q_lane_u64((uint64_t *)outptr6, vreinterpretq_u64_u8(rows_26), 1); vst1q_lane_u64((uint64_t *)outptr7, vreinterpretq_u64_u8(rows_37), 1); }