diff options
Diffstat (limited to 'media/libvpx/vp8/common/arm/neon/idct_dequant_full_2x_neon.c')
| -rw-r--r-- | media/libvpx/vp8/common/arm/neon/idct_dequant_full_2x_neon.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/arm/neon/idct_dequant_full_2x_neon.c b/media/libvpx/vp8/common/arm/neon/idct_dequant_full_2x_neon.c new file mode 100644 index 000000000..a60ed46b7 --- /dev/null +++ b/media/libvpx/vp8/common/arm/neon/idct_dequant_full_2x_neon.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2014 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE 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. + */ + +#include <arm_neon.h> + +static const int16_t cospi8sqrt2minus1 = 20091; +static const int16_t sinpi8sqrt2 = 17734; +// because the lowest bit in 0x8a8c is 0, we can pre-shift this + +void idct_dequant_full_2x_neon( + int16_t *q, + int16_t *dq, + unsigned char *dst, + int stride) { + unsigned char *dst0, *dst1; + int32x2_t d28, d29, d30, d31; + int16x8_t q0, q1, q2, q3, q4, q5, q6, q7, q8, q9, q10, q11; + int16x8_t qEmpty = vdupq_n_s16(0); + int32x4x2_t q2tmp0, q2tmp1; + int16x8x2_t q2tmp2, q2tmp3; + int16x4_t dLow0, dLow1, dHigh0, dHigh1; + + d28 = d29 = d30 = d31 = vdup_n_s32(0); + + // load dq + q0 = vld1q_s16(dq); + dq += 8; + q1 = vld1q_s16(dq); + + // load q + q2 = vld1q_s16(q); + vst1q_s16(q, qEmpty); + q += 8; + q3 = vld1q_s16(q); + vst1q_s16(q, qEmpty); + q += 8; + q4 = vld1q_s16(q); + vst1q_s16(q, qEmpty); + q += 8; + q5 = vld1q_s16(q); + vst1q_s16(q, qEmpty); + + // load src from dst + dst0 = dst; + dst1 = dst + 4; + d28 = vld1_lane_s32((const int32_t *)dst0, d28, 0); + dst0 += stride; + d28 = vld1_lane_s32((const int32_t *)dst1, d28, 1); + dst1 += stride; + d29 = vld1_lane_s32((const int32_t *)dst0, d29, 0); + dst0 += stride; + d29 = vld1_lane_s32((const int32_t *)dst1, d29, 1); + dst1 += stride; + + d30 = vld1_lane_s32((const int32_t *)dst0, d30, 0); + dst0 += stride; + d30 = vld1_lane_s32((const int32_t *)dst1, d30, 1); + dst1 += stride; + d31 = vld1_lane_s32((const int32_t *)dst0, d31, 0); + d31 = vld1_lane_s32((const int32_t *)dst1, d31, 1); + + q2 = vmulq_s16(q2, q0); + q3 = vmulq_s16(q3, q1); + q4 = vmulq_s16(q4, q0); + q5 = vmulq_s16(q5, q1); + + // vswp + dLow0 = vget_low_s16(q2); + dHigh0 = vget_high_s16(q2); + dLow1 = vget_low_s16(q4); + dHigh1 = vget_high_s16(q4); + q2 = vcombine_s16(dLow0, dLow1); + q4 = vcombine_s16(dHigh0, dHigh1); + + dLow0 = vget_low_s16(q3); + dHigh0 = vget_high_s16(q3); + dLow1 = vget_low_s16(q5); + dHigh1 = vget_high_s16(q5); + q3 = vcombine_s16(dLow0, dLow1); + q5 = vcombine_s16(dHigh0, dHigh1); + + q6 = vqdmulhq_n_s16(q4, sinpi8sqrt2); + q7 = vqdmulhq_n_s16(q5, sinpi8sqrt2); + q8 = vqdmulhq_n_s16(q4, cospi8sqrt2minus1); + q9 = vqdmulhq_n_s16(q5, cospi8sqrt2minus1); + + q10 = vqaddq_s16(q2, q3); + q11 = vqsubq_s16(q2, q3); + + q8 = vshrq_n_s16(q8, 1); + q9 = vshrq_n_s16(q9, 1); + + q4 = vqaddq_s16(q4, q8); + q5 = vqaddq_s16(q5, q9); + + q2 = vqsubq_s16(q6, q5); + q3 = vqaddq_s16(q7, q4); + + q4 = vqaddq_s16(q10, q3); + q5 = vqaddq_s16(q11, q2); + q6 = vqsubq_s16(q11, q2); + q7 = vqsubq_s16(q10, q3); + + q2tmp0 = vtrnq_s32(vreinterpretq_s32_s16(q4), vreinterpretq_s32_s16(q6)); + q2tmp1 = vtrnq_s32(vreinterpretq_s32_s16(q5), vreinterpretq_s32_s16(q7)); + q2tmp2 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[0]), + vreinterpretq_s16_s32(q2tmp1.val[0])); + q2tmp3 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[1]), + vreinterpretq_s16_s32(q2tmp1.val[1])); + + // loop 2 + q8 = vqdmulhq_n_s16(q2tmp2.val[1], sinpi8sqrt2); + q9 = vqdmulhq_n_s16(q2tmp3.val[1], sinpi8sqrt2); + q10 = vqdmulhq_n_s16(q2tmp2.val[1], cospi8sqrt2minus1); + q11 = vqdmulhq_n_s16(q2tmp3.val[1], cospi8sqrt2minus1); + + q2 = vqaddq_s16(q2tmp2.val[0], q2tmp3.val[0]); + q3 = vqsubq_s16(q2tmp2.val[0], q2tmp3.val[0]); + + q10 = vshrq_n_s16(q10, 1); + q11 = vshrq_n_s16(q11, 1); + + q10 = vqaddq_s16(q2tmp2.val[1], q10); + q11 = vqaddq_s16(q2tmp3.val[1], q11); + + q8 = vqsubq_s16(q8, q11); + q9 = vqaddq_s16(q9, q10); + + q4 = vqaddq_s16(q2, q9); + q5 = vqaddq_s16(q3, q8); + q6 = vqsubq_s16(q3, q8); + q7 = vqsubq_s16(q2, q9); + + q4 = vrshrq_n_s16(q4, 3); + q5 = vrshrq_n_s16(q5, 3); + q6 = vrshrq_n_s16(q6, 3); + q7 = vrshrq_n_s16(q7, 3); + + q2tmp0 = vtrnq_s32(vreinterpretq_s32_s16(q4), vreinterpretq_s32_s16(q6)); + q2tmp1 = vtrnq_s32(vreinterpretq_s32_s16(q5), vreinterpretq_s32_s16(q7)); + q2tmp2 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[0]), + vreinterpretq_s16_s32(q2tmp1.val[0])); + q2tmp3 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[1]), + vreinterpretq_s16_s32(q2tmp1.val[1])); + + q4 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp2.val[0]), + vreinterpret_u8_s32(d28))); + q5 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp2.val[1]), + vreinterpret_u8_s32(d29))); + q6 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp3.val[0]), + vreinterpret_u8_s32(d30))); + q7 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp3.val[1]), + vreinterpret_u8_s32(d31))); + + d28 = vreinterpret_s32_u8(vqmovun_s16(q4)); + d29 = vreinterpret_s32_u8(vqmovun_s16(q5)); + d30 = vreinterpret_s32_u8(vqmovun_s16(q6)); + d31 = vreinterpret_s32_u8(vqmovun_s16(q7)); + + dst0 = dst; + dst1 = dst + 4; + vst1_lane_s32((int32_t *)dst0, d28, 0); + dst0 += stride; + vst1_lane_s32((int32_t *)dst1, d28, 1); + dst1 += stride; + vst1_lane_s32((int32_t *)dst0, d29, 0); + dst0 += stride; + vst1_lane_s32((int32_t *)dst1, d29, 1); + dst1 += stride; + + vst1_lane_s32((int32_t *)dst0, d30, 0); + dst0 += stride; + vst1_lane_s32((int32_t *)dst1, d30, 1); + dst1 += stride; + vst1_lane_s32((int32_t *)dst0, d31, 0); + vst1_lane_s32((int32_t *)dst1, d31, 1); + return; +} |