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Diffstat (limited to 'media/libvpx/vp8/common/arm/neon/iwalsh_neon.c')
-rw-r--r--media/libvpx/vp8/common/arm/neon/iwalsh_neon.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/arm/neon/iwalsh_neon.c b/media/libvpx/vp8/common/arm/neon/iwalsh_neon.c
new file mode 100644
index 000000000..6ea9dd712
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/neon/iwalsh_neon.c
@@ -0,0 +1,102 @@
+/*
+ * 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>
+
+void vp8_short_inv_walsh4x4_neon(
+ int16_t *input,
+ int16_t *mb_dqcoeff) {
+ int16x8_t q0s16, q1s16, q2s16, q3s16;
+ int16x4_t d4s16, d5s16, d6s16, d7s16;
+ int16x4x2_t v2tmp0, v2tmp1;
+ int32x2x2_t v2tmp2, v2tmp3;
+ int16x8_t qAdd3;
+
+ q0s16 = vld1q_s16(input);
+ q1s16 = vld1q_s16(input + 8);
+
+ // 1st for loop
+ d4s16 = vadd_s16(vget_low_s16(q0s16), vget_high_s16(q1s16));
+ d6s16 = vadd_s16(vget_high_s16(q0s16), vget_low_s16(q1s16));
+ d5s16 = vsub_s16(vget_low_s16(q0s16), vget_high_s16(q1s16));
+ d7s16 = vsub_s16(vget_high_s16(q0s16), vget_low_s16(q1s16));
+
+ q2s16 = vcombine_s16(d4s16, d5s16);
+ q3s16 = vcombine_s16(d6s16, d7s16);
+
+ q0s16 = vaddq_s16(q2s16, q3s16);
+ q1s16 = vsubq_s16(q2s16, q3s16);
+
+ v2tmp2 = vtrn_s32(vreinterpret_s32_s16(vget_low_s16(q0s16)),
+ vreinterpret_s32_s16(vget_low_s16(q1s16)));
+ v2tmp3 = vtrn_s32(vreinterpret_s32_s16(vget_high_s16(q0s16)),
+ vreinterpret_s32_s16(vget_high_s16(q1s16)));
+ v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]),
+ vreinterpret_s16_s32(v2tmp3.val[0]));
+ v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]),
+ vreinterpret_s16_s32(v2tmp3.val[1]));
+
+ // 2nd for loop
+ d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[1]);
+ d6s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[0]);
+ d5s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[1]);
+ d7s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[0]);
+ q2s16 = vcombine_s16(d4s16, d5s16);
+ q3s16 = vcombine_s16(d6s16, d7s16);
+
+ qAdd3 = vdupq_n_s16(3);
+
+ q0s16 = vaddq_s16(q2s16, q3s16);
+ q1s16 = vsubq_s16(q2s16, q3s16);
+
+ q0s16 = vaddq_s16(q0s16, qAdd3);
+ q1s16 = vaddq_s16(q1s16, qAdd3);
+
+ q0s16 = vshrq_n_s16(q0s16, 3);
+ q1s16 = vshrq_n_s16(q1s16, 3);
+
+ // store
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 0);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 0);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 0);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 0);
+ mb_dqcoeff += 16;
+
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 1);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 1);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 1);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 1);
+ mb_dqcoeff += 16;
+
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 2);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 2);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 2);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 2);
+ mb_dqcoeff += 16;
+
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 3);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 3);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 3);
+ mb_dqcoeff += 16;
+ vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 3);
+ mb_dqcoeff += 16;
+ return;
+}