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-rw-r--r--media/libvpx/libvpx/vpx_dsp/ppc/vpx_convolve_vsx.c408
1 files changed, 408 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/ppc/vpx_convolve_vsx.c b/media/libvpx/libvpx/vpx_dsp/ppc/vpx_convolve_vsx.c
new file mode 100644
index 0000000000..2dc66055cc
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/ppc/vpx_convolve_vsx.c
@@ -0,0 +1,408 @@
+/*
+ * Copyright (c) 2017 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 <assert.h>
+#include <string.h>
+
+#include "./vpx_dsp_rtcd.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_dsp/ppc/types_vsx.h"
+#include "vpx_dsp/vpx_filter.h"
+
+// TODO(lu_zero): unroll
+static VPX_FORCE_INLINE void copy_w16(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ vec_vsx_st(vec_vsx_ld(0, src), 0, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static VPX_FORCE_INLINE void copy_w32(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ vec_vsx_st(vec_vsx_ld(0, src), 0, dst);
+ vec_vsx_st(vec_vsx_ld(16, src), 16, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static VPX_FORCE_INLINE void copy_w64(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ vec_vsx_st(vec_vsx_ld(0, src), 0, dst);
+ vec_vsx_st(vec_vsx_ld(16, src), 16, dst);
+ vec_vsx_st(vec_vsx_ld(32, src), 32, dst);
+ vec_vsx_st(vec_vsx_ld(48, src), 48, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+void vpx_convolve_copy_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4, int x_step_q4,
+ int y0_q4, int32_t y_step_q4, int32_t w, int32_t h) {
+ (void)filter;
+ (void)x0_q4;
+ (void)x_step_q4;
+ (void)y0_q4;
+ (void)y_step_q4;
+
+ switch (w) {
+ case 16: {
+ copy_w16(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ case 32: {
+ copy_w32(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ case 64: {
+ copy_w64(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ default: {
+ int i;
+ for (i = h; i--;) {
+ memcpy(dst, src, w);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ break;
+ }
+ }
+}
+
+static VPX_FORCE_INLINE void avg_w16(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ const uint8x16_t v = vec_avg(vec_vsx_ld(0, src), vec_vsx_ld(0, dst));
+ vec_vsx_st(v, 0, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static VPX_FORCE_INLINE void avg_w32(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ const uint8x16_t v0 = vec_avg(vec_vsx_ld(0, src), vec_vsx_ld(0, dst));
+ const uint8x16_t v1 = vec_avg(vec_vsx_ld(16, src), vec_vsx_ld(16, dst));
+ vec_vsx_st(v0, 0, dst);
+ vec_vsx_st(v1, 16, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static VPX_FORCE_INLINE void avg_w64(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ int32_t h) {
+ int i;
+
+ for (i = h; i--;) {
+ const uint8x16_t v0 = vec_avg(vec_vsx_ld(0, src), vec_vsx_ld(0, dst));
+ const uint8x16_t v1 = vec_avg(vec_vsx_ld(16, src), vec_vsx_ld(16, dst));
+ const uint8x16_t v2 = vec_avg(vec_vsx_ld(32, src), vec_vsx_ld(32, dst));
+ const uint8x16_t v3 = vec_avg(vec_vsx_ld(48, src), vec_vsx_ld(48, dst));
+ vec_vsx_st(v0, 0, dst);
+ vec_vsx_st(v1, 16, dst);
+ vec_vsx_st(v2, 32, dst);
+ vec_vsx_st(v3, 48, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+void vpx_convolve_avg_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4, int x_step_q4,
+ int y0_q4, int32_t y_step_q4, int32_t w, int32_t h) {
+ switch (w) {
+ case 16: {
+ avg_w16(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ case 32: {
+ avg_w32(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ case 64: {
+ avg_w64(src, src_stride, dst, dst_stride, h);
+ break;
+ }
+ default: {
+ vpx_convolve_avg_c(src, src_stride, dst, dst_stride, filter, x0_q4,
+ x_step_q4, y0_q4, y_step_q4, w, h);
+ break;
+ }
+ }
+}
+
+static VPX_FORCE_INLINE void convolve_line(uint8_t *dst, const int16x8_t s,
+ const int16x8_t f) {
+ const int32x4_t sum = vec_msum(s, f, vec_splat_s32(0));
+ const int32x4_t bias =
+ vec_sl(vec_splat_s32(1), vec_splat_u32(FILTER_BITS - 1));
+ const int32x4_t avg = vec_sr(vec_sums(sum, bias), vec_splat_u32(FILTER_BITS));
+ const uint8x16_t v = vec_splat(
+ vec_packsu(vec_pack(avg, vec_splat_s32(0)), vec_splat_s16(0)), 3);
+ vec_ste(v, 0, dst);
+}
+
+static VPX_FORCE_INLINE void convolve_line_h(uint8_t *dst,
+ const uint8_t *const src_x,
+ const int16_t *const x_filter) {
+ const int16x8_t s = unpack_to_s16_h(vec_vsx_ld(0, src_x));
+ const int16x8_t f = vec_vsx_ld(0, x_filter);
+
+ convolve_line(dst, s, f);
+}
+
+// TODO(lu_zero): Implement 8x8 and bigger block special cases
+static VPX_FORCE_INLINE void convolve_horiz(const uint8_t *src,
+ ptrdiff_t src_stride, uint8_t *dst,
+ ptrdiff_t dst_stride,
+ const InterpKernel *x_filters,
+ int x0_q4, int x_step_q4, int w,
+ int h) {
+ int x, y;
+ src -= SUBPEL_TAPS / 2 - 1;
+
+ for (y = 0; y < h; ++y) {
+ int x_q4 = x0_q4;
+ for (x = 0; x < w; ++x) {
+ convolve_line_h(dst + x, &src[x_q4 >> SUBPEL_BITS],
+ x_filters[x_q4 & SUBPEL_MASK]);
+ x_q4 += x_step_q4;
+ }
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static VPX_FORCE_INLINE void convolve_avg_horiz(
+ const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst,
+ ptrdiff_t dst_stride, const InterpKernel *x_filters, int x0_q4,
+ int x_step_q4, int w, int h) {
+ int x, y;
+ src -= SUBPEL_TAPS / 2 - 1;
+
+ for (y = 0; y < h; ++y) {
+ int x_q4 = x0_q4;
+ for (x = 0; x < w; ++x) {
+ uint8_t v;
+ convolve_line_h(&v, &src[x_q4 >> SUBPEL_BITS],
+ x_filters[x_q4 & SUBPEL_MASK]);
+ dst[x] = ROUND_POWER_OF_TWO(dst[x] + v, 1);
+ x_q4 += x_step_q4;
+ }
+ src += src_stride;
+ dst += dst_stride;
+ }
+}
+
+static uint8x16_t transpose_line_u8_8x8(uint8x16_t a, uint8x16_t b,
+ uint8x16_t c, uint8x16_t d,
+ uint8x16_t e, uint8x16_t f,
+ uint8x16_t g, uint8x16_t h) {
+ uint16x8_t ab = (uint16x8_t)vec_mergeh(a, b);
+ uint16x8_t cd = (uint16x8_t)vec_mergeh(c, d);
+ uint16x8_t ef = (uint16x8_t)vec_mergeh(e, f);
+ uint16x8_t gh = (uint16x8_t)vec_mergeh(g, h);
+
+ uint32x4_t abcd = (uint32x4_t)vec_mergeh(ab, cd);
+ uint32x4_t efgh = (uint32x4_t)vec_mergeh(ef, gh);
+
+ return (uint8x16_t)vec_mergeh(abcd, efgh);
+}
+
+static VPX_FORCE_INLINE void convolve_line_v(uint8_t *dst,
+ const uint8_t *const src_y,
+ ptrdiff_t src_stride,
+ const int16_t *const y_filter) {
+ uint8x16_t s0 = vec_vsx_ld(0, src_y + 0 * src_stride);
+ uint8x16_t s1 = vec_vsx_ld(0, src_y + 1 * src_stride);
+ uint8x16_t s2 = vec_vsx_ld(0, src_y + 2 * src_stride);
+ uint8x16_t s3 = vec_vsx_ld(0, src_y + 3 * src_stride);
+ uint8x16_t s4 = vec_vsx_ld(0, src_y + 4 * src_stride);
+ uint8x16_t s5 = vec_vsx_ld(0, src_y + 5 * src_stride);
+ uint8x16_t s6 = vec_vsx_ld(0, src_y + 6 * src_stride);
+ uint8x16_t s7 = vec_vsx_ld(0, src_y + 7 * src_stride);
+ const int16x8_t f = vec_vsx_ld(0, y_filter);
+ uint8_t buf[16];
+ const uint8x16_t s = transpose_line_u8_8x8(s0, s1, s2, s3, s4, s5, s6, s7);
+
+ vec_vsx_st(s, 0, buf);
+
+ convolve_line(dst, unpack_to_s16_h(s), f);
+}
+
+static VPX_FORCE_INLINE void convolve_vert(const uint8_t *src,
+ ptrdiff_t src_stride, uint8_t *dst,
+ ptrdiff_t dst_stride,
+ const InterpKernel *y_filters,
+ int y0_q4, int y_step_q4, int w,
+ int h) {
+ int x, y;
+ src -= src_stride * (SUBPEL_TAPS / 2 - 1);
+
+ for (x = 0; x < w; ++x) {
+ int y_q4 = y0_q4;
+ for (y = 0; y < h; ++y) {
+ convolve_line_v(dst + y * dst_stride,
+ &src[(y_q4 >> SUBPEL_BITS) * src_stride], src_stride,
+ y_filters[y_q4 & SUBPEL_MASK]);
+ y_q4 += y_step_q4;
+ }
+ ++src;
+ ++dst;
+ }
+}
+
+static VPX_FORCE_INLINE void convolve_avg_vert(
+ const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst,
+ ptrdiff_t dst_stride, const InterpKernel *y_filters, int y0_q4,
+ int y_step_q4, int w, int h) {
+ int x, y;
+ src -= src_stride * (SUBPEL_TAPS / 2 - 1);
+
+ for (x = 0; x < w; ++x) {
+ int y_q4 = y0_q4;
+ for (y = 0; y < h; ++y) {
+ uint8_t v;
+ convolve_line_v(&v, &src[(y_q4 >> SUBPEL_BITS) * src_stride], src_stride,
+ y_filters[y_q4 & SUBPEL_MASK]);
+ dst[y * dst_stride] = ROUND_POWER_OF_TWO(dst[y * dst_stride] + v, 1);
+ y_q4 += y_step_q4;
+ }
+ ++src;
+ ++dst;
+ }
+}
+
+static VPX_FORCE_INLINE void convolve(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *const filter,
+ int x0_q4, int x_step_q4, int y0_q4,
+ int y_step_q4, int w, int h) {
+ // Note: Fixed size intermediate buffer, temp, places limits on parameters.
+ // 2d filtering proceeds in 2 steps:
+ // (1) Interpolate horizontally into an intermediate buffer, temp.
+ // (2) Interpolate temp vertically to derive the sub-pixel result.
+ // Deriving the maximum number of rows in the temp buffer (135):
+ // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative).
+ // --Largest block size is 64x64 pixels.
+ // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the
+ // original frame (in 1/16th pixel units).
+ // --Must round-up because block may be located at sub-pixel position.
+ // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails.
+ // --((64 - 1) * 32 + 15) >> 4 + 8 = 135.
+ DECLARE_ALIGNED(16, uint8_t, temp[64 * 135]);
+ const int intermediate_height =
+ (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS;
+
+ assert(w <= 64);
+ assert(h <= 64);
+ assert(y_step_q4 <= 32);
+ assert(x_step_q4 <= 32);
+
+ convolve_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, temp, 64,
+ filter, x0_q4, x_step_q4, w, intermediate_height);
+ convolve_vert(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst, dst_stride, filter,
+ y0_q4, y_step_q4, w, h);
+}
+
+void vpx_convolve8_horiz_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4,
+ int x_step_q4, int y0_q4, int y_step_q4, int w,
+ int h) {
+ (void)y0_q4;
+ (void)y_step_q4;
+
+ convolve_horiz(src, src_stride, dst, dst_stride, filter, x0_q4, x_step_q4, w,
+ h);
+}
+
+void vpx_convolve8_avg_horiz_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4,
+ int x_step_q4, int y0_q4, int y_step_q4, int w,
+ int h) {
+ (void)y0_q4;
+ (void)y_step_q4;
+
+ convolve_avg_horiz(src, src_stride, dst, dst_stride, filter, x0_q4, x_step_q4,
+ w, h);
+}
+
+void vpx_convolve8_vert_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4,
+ int x_step_q4, int y0_q4, int y_step_q4, int w,
+ int h) {
+ (void)x0_q4;
+ (void)x_step_q4;
+
+ convolve_vert(src, src_stride, dst, dst_stride, filter, y0_q4, y_step_q4, w,
+ h);
+}
+
+void vpx_convolve8_avg_vert_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4,
+ int x_step_q4, int y0_q4, int y_step_q4, int w,
+ int h) {
+ (void)x0_q4;
+ (void)x_step_q4;
+
+ convolve_avg_vert(src, src_stride, dst, dst_stride, filter, y0_q4, y_step_q4,
+ w, h);
+}
+
+void vpx_convolve8_vsx(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst,
+ ptrdiff_t dst_stride, const InterpKernel *filter,
+ int x0_q4, int x_step_q4, int y0_q4, int y_step_q4,
+ int w, int h) {
+ convolve(src, src_stride, dst, dst_stride, filter, x0_q4, x_step_q4, y0_q4,
+ y_step_q4, w, h);
+}
+
+void vpx_convolve8_avg_vsx(const uint8_t *src, ptrdiff_t src_stride,
+ uint8_t *dst, ptrdiff_t dst_stride,
+ const InterpKernel *filter, int x0_q4, int x_step_q4,
+ int y0_q4, int y_step_q4, int w, int h) {
+ // Fixed size intermediate buffer places limits on parameters.
+ DECLARE_ALIGNED(16, uint8_t, temp[64 * 64]);
+ assert(w <= 64);
+ assert(h <= 64);
+
+ vpx_convolve8_vsx(src, src_stride, temp, 64, filter, x0_q4, x_step_q4, y0_q4,
+ y_step_q4, w, h);
+ vpx_convolve_avg_vsx(temp, 64, dst, dst_stride, NULL, 0, 0, 0, 0, w, h);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-06 22:08:35 +0000