diff --git a/aom_dsp/quantize.c b/aom_dsp/quantize.c
new file mode 100644
index 0000000..c901aa0
--- /dev/null
+++ b/aom_dsp/quantize.c
@@ -0,0 +1,686 @@
+/*
+ *  Copyright (c) 2015 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 "./vpx_dsp_rtcd.h"
+#include "aom_dsp/quantize.h"
+#include "aom_mem/vpx_mem.h"
+
+#if CONFIG_AOM_QM
+void vpx_quantize_dc(const tran_low_t *coeff_ptr, int n_coeffs, int skip_block,
+                     const int16_t *round_ptr, const int16_t quant,
+                     tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                     const int16_t dequant_ptr, uint16_t *eob_ptr,
+                     const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
+  const int rc = 0;
+  const int coeff = coeff_ptr[rc];
+  const int coeff_sign = (coeff >> 31);
+  const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+  int64_t tmp, eob = -1;
+  int32_t tmp32;
+  int dequant =
+      (dequant_ptr * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
+    tmp32 = (int32_t)((tmp * qm_ptr[rc] * quant) >> (16 + AOM_QM_BITS));
+    qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
+    dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant;
+    if (tmp32) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_dc(const tran_low_t *coeff_ptr, int n_coeffs,
+                            int skip_block, const int16_t *round_ptr,
+                            const int16_t quant, tran_low_t *qcoeff_ptr,
+                            tran_low_t *dqcoeff_ptr, const int16_t dequant_ptr,
+                            uint16_t *eob_ptr, const qm_val_t *qm_ptr,
+                            const qm_val_t *iqm_ptr) {
+  int eob = -1;
+  int dequant =
+      (dequant_ptr * iqm_ptr[0] + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    const int coeff = coeff_ptr[0];
+    const int coeff_sign = (coeff >> 31);
+    const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+    const int64_t tmp = abs_coeff + round_ptr[0];
+    const uint32_t abs_qcoeff =
+        (uint32_t)((tmp * qm_ptr[0] * quant) >> (16 + AOM_QM_BITS));
+    qcoeff_ptr[0] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+    dqcoeff_ptr[0] = qcoeff_ptr[0] * dequant;
+    if (abs_qcoeff) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_dc_32x32(const tran_low_t *coeff_ptr, int skip_block,
+                           const int16_t *round_ptr, const int16_t quant,
+                           tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                           const int16_t dequant_ptr, uint16_t *eob_ptr,
+                           const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
+  const int n_coeffs = 1024;
+  const int rc = 0;
+  const int coeff = coeff_ptr[rc];
+  const int coeff_sign = (coeff >> 31);
+  const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+  int64_t tmp, eob = -1;
+  int32_t tmp32;
+  int dequant;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    tmp = clamp(abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1),
+                INT16_MIN, INT16_MAX);
+    tmp32 = (int32_t)((tmp * qm_ptr[rc] * quant) >> (15 + AOM_QM_BITS));
+    qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
+    dequant =
+        (dequant_ptr * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS;
+    dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / 2;
+    if (tmp32) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_dc_32x32(const tran_low_t *coeff_ptr, int skip_block,
+                                  const int16_t *round_ptr, const int16_t quant,
+                                  tran_low_t *qcoeff_ptr,
+                                  tran_low_t *dqcoeff_ptr,
+                                  const int16_t dequant_ptr, uint16_t *eob_ptr,
+                                  const qm_val_t *qm_ptr,
+                                  const qm_val_t *iqm_ptr) {
+  const int n_coeffs = 1024;
+  int eob = -1;
+  int dequant;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    const int coeff = coeff_ptr[0];
+    const int coeff_sign = (coeff >> 31);
+    const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+    const int64_t tmp = abs_coeff + ROUND_POWER_OF_TWO(round_ptr[0], 1);
+    const uint32_t abs_qcoeff =
+        (uint32_t)((tmp * qm_ptr[0] * quant) >> (15 + AOM_QM_BITS));
+    qcoeff_ptr[0] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+    dequant =
+        (dequant_ptr * iqm_ptr[0] + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS;
+    dqcoeff_ptr[0] = (qcoeff_ptr[0] * dequant) / 2;
+    if (abs_qcoeff) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                      int skip_block, const int16_t *zbin_ptr,
+                      const int16_t *round_ptr, const int16_t *quant_ptr,
+                      const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
+                      tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
+                      uint16_t *eob_ptr, const int16_t *scan,
+                      const int16_t *iscan, const qm_val_t *qm_ptr,
+                      const qm_val_t *iqm_ptr) {
+  int i, non_zero_count = (int)n_coeffs, eob = -1;
+  const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = (int)n_coeffs - 1; i >= 0; i--) {
+      const int rc = scan[i];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff = coeff_ptr[rc] * wt;
+
+      if (coeff < (zbins[rc != 0] << AOM_QM_BITS) &&
+          coeff > (nzbins[rc != 0] << AOM_QM_BITS))
+        non_zero_count--;
+      else
+        break;
+    }
+
+    // Quantization pass: All coefficients with index >= zero_flag are
+    // skippable. Note: zero_flag can be zero.
+    for (i = 0; i < non_zero_count; i++) {
+      const int rc = scan[i];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+      int dequant;
+
+      if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
+        int32_t tmp32;
+        int64_t tmp =
+            clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
+        tmp = tmp * wt;
+        tmp32 = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
+                 quant_shift_ptr[rc != 0]) >>
+                (16 + AOM_QM_BITS);  // quantization
+        dequant =
+            (dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
+            AOM_QM_BITS;
+        qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
+        dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant;
+
+        if (tmp32) eob = i;
+      }
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                             int skip_block, const int16_t *zbin_ptr,
+                             const int16_t *round_ptr, const int16_t *quant_ptr,
+                             const int16_t *quant_shift_ptr,
+                             tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                             const int16_t *dequant_ptr, uint16_t *eob_ptr,
+                             const int16_t *scan, const int16_t *iscan,
+                             const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
+  int i, non_zero_count = (int)n_coeffs, eob = -1;
+  const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+  int dequant;
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = (int)n_coeffs - 1; i >= 0; i--) {
+      const int rc = scan[i];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff = coeff_ptr[rc] * wt;
+
+      if (coeff < (zbins[rc != 0] << AOM_QM_BITS) &&
+          coeff > (nzbins[rc != 0] << AOM_QM_BITS))
+        non_zero_count--;
+      else
+        break;
+    }
+
+    // Quantization pass: All coefficients with index >= zero_flag are
+    // skippable. Note: zero_flag can be zero.
+    for (i = 0; i < non_zero_count; i++) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+      if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
+        const int64_t tmp1 = abs_coeff + round_ptr[rc != 0];
+        const int64_t tmpw = tmp1 * wt;
+        const int64_t tmp2 = ((tmpw * quant_ptr[rc != 0]) >> 16) + tmpw;
+        const uint32_t abs_qcoeff =
+            (uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> (16 + AOM_QM_BITS));
+        qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+        dequant =
+            (dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
+            AOM_QM_BITS;
+        dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant;
+        if (abs_qcoeff) eob = i;
+      }
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_b_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                            int skip_block, const int16_t *zbin_ptr,
+                            const int16_t *round_ptr, const int16_t *quant_ptr,
+                            const int16_t *quant_shift_ptr,
+                            tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                            const int16_t *dequant_ptr, uint16_t *eob_ptr,
+                            const int16_t *scan, const int16_t *iscan,
+                            const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
+  const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
+                         ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+
+  int idx = 0;
+  int idx_arr[1024];
+  int i, eob = -1;
+  int dequant;
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = 0; i < n_coeffs; i++) {
+      const int rc = scan[i];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff = coeff_ptr[rc] * wt;
+
+      // If the coefficient is out of the base ZBIN range, keep it for
+      // quantization.
+      if (coeff >= (zbins[rc != 0] << AOM_QM_BITS) ||
+          coeff <= (nzbins[rc != 0] << AOM_QM_BITS))
+        idx_arr[idx++] = i;
+    }
+
+    // Quantization pass: only process the coefficients selected in
+    // pre-scan pass. Note: idx can be zero.
+    for (i = 0; i < idx; i++) {
+      const int rc = scan[idx_arr[i]];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const qm_val_t wt = qm_ptr[rc];
+      int64_t tmp;
+      int tmp32;
+      int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+      abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+      tmp = clamp(abs_coeff, INT16_MIN, INT16_MAX);
+      tmp = tmp * wt;
+      tmp32 = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
+               quant_shift_ptr[rc != 0]) >>
+              (15 + AOM_QM_BITS);
+
+      qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
+      dequant =
+          (dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
+          AOM_QM_BITS;
+      dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / 2;
+
+      if (tmp32) eob = idx_arr[i];
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_b_32x32_c(
+    const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
+    const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr,
+    const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
+    tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
+    const int16_t *scan, const int16_t *iscan, const qm_val_t *qm_ptr,
+    const qm_val_t *iqm_ptr) {
+  const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
+                         ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+
+  int idx = 0;
+  int idx_arr[1024];
+  int i, eob = -1;
+  int dequant;
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = 0; i < n_coeffs; i++) {
+      const int rc = scan[i];
+      const qm_val_t wt = qm_ptr[rc];
+      const int coeff = coeff_ptr[rc] * wt;
+
+      // If the coefficient is out of the base ZBIN range, keep it for
+      // quantization.
+      if (coeff >= (zbins[rc != 0] << AOM_QM_BITS) ||
+          coeff <= (nzbins[rc != 0] << AOM_QM_BITS))
+        idx_arr[idx++] = i;
+    }
+
+    // Quantization pass: only process the coefficients selected in
+    // pre-scan pass. Note: idx can be zero.
+    for (i = 0; i < idx; i++) {
+      const int rc = scan[idx_arr[i]];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const qm_val_t wt = qm_ptr[rc];
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+      const int64_t tmp1 =
+          abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+      const int64_t tmpw = tmp1 * wt;
+      const int64_t tmp2 = ((tmpw * quant_ptr[rc != 0]) >> 16) + tmpw;
+      const uint32_t abs_qcoeff =
+          (uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> (15 + AOM_QM_BITS));
+      qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+      dequant =
+          (dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
+          AOM_QM_BITS;
+      dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / 2;
+      if (abs_qcoeff) eob = idx_arr[i];
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+#else
+void vpx_quantize_dc(const tran_low_t *coeff_ptr, int n_coeffs, int skip_block,
+                     const int16_t *round_ptr, const int16_t quant,
+                     tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                     const int16_t dequant_ptr, uint16_t *eob_ptr) {
+  const int rc = 0;
+  const int coeff = coeff_ptr[rc];
+  const int coeff_sign = (coeff >> 31);
+  const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+  int tmp, eob = -1;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
+    tmp = (tmp * quant) >> 16;
+    qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+    dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr;
+    if (tmp) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_dc(const tran_low_t *coeff_ptr, int n_coeffs,
+                            int skip_block, const int16_t *round_ptr,
+                            const int16_t quant, tran_low_t *qcoeff_ptr,
+                            tran_low_t *dqcoeff_ptr, const int16_t dequant_ptr,
+                            uint16_t *eob_ptr) {
+  int eob = -1;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    const int coeff = coeff_ptr[0];
+    const int coeff_sign = (coeff >> 31);
+    const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+    const int64_t tmp = abs_coeff + round_ptr[0];
+    const int abs_qcoeff = (int)((tmp * quant) >> 16);
+    qcoeff_ptr[0] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+    dqcoeff_ptr[0] = qcoeff_ptr[0] * dequant_ptr;
+    if (abs_qcoeff) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_dc_32x32(const tran_low_t *coeff_ptr, int skip_block,
+                           const int16_t *round_ptr, const int16_t quant,
+                           tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                           const int16_t dequant_ptr, uint16_t *eob_ptr) {
+  const int n_coeffs = 1024;
+  const int rc = 0;
+  const int coeff = coeff_ptr[rc];
+  const int coeff_sign = (coeff >> 31);
+  const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+  int tmp, eob = -1;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    tmp = clamp(abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1),
+                INT16_MIN, INT16_MAX);
+    tmp = (tmp * quant) >> 15;
+    qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+    dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr / 2;
+    if (tmp) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_dc_32x32(const tran_low_t *coeff_ptr, int skip_block,
+                                  const int16_t *round_ptr, const int16_t quant,
+                                  tran_low_t *qcoeff_ptr,
+                                  tran_low_t *dqcoeff_ptr,
+                                  const int16_t dequant_ptr,
+                                  uint16_t *eob_ptr) {
+  const int n_coeffs = 1024;
+  int eob = -1;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    const int coeff = coeff_ptr[0];
+    const int coeff_sign = (coeff >> 31);
+    const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+    const int64_t tmp = abs_coeff + ROUND_POWER_OF_TWO(round_ptr[0], 1);
+    const int abs_qcoeff = (int)((tmp * quant) >> 15);
+    qcoeff_ptr[0] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+    dqcoeff_ptr[0] = qcoeff_ptr[0] * dequant_ptr / 2;
+    if (abs_qcoeff) eob = 0;
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                      int skip_block, const int16_t *zbin_ptr,
+                      const int16_t *round_ptr, const int16_t *quant_ptr,
+                      const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
+                      tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
+                      uint16_t *eob_ptr, const int16_t *scan,
+                      const int16_t *iscan) {
+  int i, non_zero_count = (int)n_coeffs, eob = -1;
+  const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = (int)n_coeffs - 1; i >= 0; i--) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+
+      if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
+        non_zero_count--;
+      else
+        break;
+    }
+
+    // Quantization pass: All coefficients with index >= zero_flag are
+    // skippable. Note: zero_flag can be zero.
+    for (i = 0; i < non_zero_count; i++) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+      if (abs_coeff >= zbins[rc != 0]) {
+        int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
+        tmp = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
+               quant_shift_ptr[rc != 0]) >>
+              16;  // quantization
+        qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+        dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
+
+        if (tmp) eob = i;
+      }
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                             int skip_block, const int16_t *zbin_ptr,
+                             const int16_t *round_ptr, const int16_t *quant_ptr,
+                             const int16_t *quant_shift_ptr,
+                             tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                             const int16_t *dequant_ptr, uint16_t *eob_ptr,
+                             const int16_t *scan, const int16_t *iscan) {
+  int i, non_zero_count = (int)n_coeffs, eob = -1;
+  const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = (int)n_coeffs - 1; i >= 0; i--) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+
+      if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
+        non_zero_count--;
+      else
+        break;
+    }
+
+    // Quantization pass: All coefficients with index >= zero_flag are
+    // skippable. Note: zero_flag can be zero.
+    for (i = 0; i < non_zero_count; i++) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+      if (abs_coeff >= zbins[rc != 0]) {
+        const int64_t tmp1 = abs_coeff + round_ptr[rc != 0];
+        const int64_t tmp2 = ((tmp1 * quant_ptr[rc != 0]) >> 16) + tmp1;
+        const uint32_t abs_qcoeff =
+            (uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> 16);
+        qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+        dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
+        if (abs_qcoeff) eob = i;
+      }
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+
+void vpx_quantize_b_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                            int skip_block, const int16_t *zbin_ptr,
+                            const int16_t *round_ptr, const int16_t *quant_ptr,
+                            const int16_t *quant_shift_ptr,
+                            tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+                            const int16_t *dequant_ptr, uint16_t *eob_ptr,
+                            const int16_t *scan, const int16_t *iscan) {
+  const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
+                         ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+
+  int idx = 0;
+  int idx_arr[1024];
+  int i, eob = -1;
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = 0; i < n_coeffs; i++) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+
+      // If the coefficient is out of the base ZBIN range, keep it for
+      // quantization.
+      if (coeff >= zbins[rc != 0] || coeff <= nzbins[rc != 0])
+        idx_arr[idx++] = i;
+    }
+
+    // Quantization pass: only process the coefficients selected in
+    // pre-scan pass. Note: idx can be zero.
+    for (i = 0; i < idx; i++) {
+      const int rc = scan[idx_arr[i]];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      int tmp;
+      int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+      abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+      abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
+      tmp = ((((abs_coeff * quant_ptr[rc != 0]) >> 16) + abs_coeff) *
+             quant_shift_ptr[rc != 0]) >>
+            15;
+
+      qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+      dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
+
+      if (tmp) eob = idx_arr[i];
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_quantize_b_32x32_c(
+    const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
+    const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr,
+    const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
+    tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
+    const int16_t *scan, const int16_t *iscan) {
+  const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
+                         ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
+  const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
+
+  int idx = 0;
+  int idx_arr[1024];
+  int i, eob = -1;
+  (void)iscan;
+
+  memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+  memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+  if (!skip_block) {
+    // Pre-scan pass
+    for (i = 0; i < n_coeffs; i++) {
+      const int rc = scan[i];
+      const int coeff = coeff_ptr[rc];
+
+      // If the coefficient is out of the base ZBIN range, keep it for
+      // quantization.
+      if (coeff >= zbins[rc != 0] || coeff <= nzbins[rc != 0])
+        idx_arr[idx++] = i;
+    }
+
+    // Quantization pass: only process the coefficients selected in
+    // pre-scan pass. Note: idx can be zero.
+    for (i = 0; i < idx; i++) {
+      const int rc = scan[idx_arr[i]];
+      const int coeff = coeff_ptr[rc];
+      const int coeff_sign = (coeff >> 31);
+      const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+      const int64_t tmp1 =
+          abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+      const int64_t tmp2 = ((tmp1 * quant_ptr[rc != 0]) >> 16) + tmp1;
+      const uint32_t abs_qcoeff =
+          (uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> 15);
+      qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+      dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
+      if (abs_qcoeff) eob = idx_arr[i];
+    }
+  }
+  *eob_ptr = eob + 1;
+}
+#endif
+#endif