swresample/aarch64: add ff_resample_common_apply_filter_{x4,x8}_{float,s16}_neon

1 files changed, 76 insertions, 0 deletions

diff --git a/libswresample/aarch64/resample.S b/libswresample/aarch64/resample.S
new file mode 100644
index 0000000000..b3b1bb9fe1
--- /dev/null
+++ b/libswresample/aarch64/resample.S
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2017 Matthieu Bouron <matthieu.bouron gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/aarch64/asm.S"
+
+function ff_resample_common_apply_filter_x4_float_neon, export=1
+    movi                v0.4S, #0                                      // accumulator
+1:  ld1                 {v1.4S}, [x1], #16                             // src[0..3]
+    ld1                 {v2.4S}, [x2], #16                             // filter[0..3]
+    fmla                v0.4S, v1.4S, v2.4S                            // accumulator += src[0..3] * filter[0..3]
+    subs                w3, w3, #4                                     // filter_length -= 4
+    b.gt                1b                                             // loop until filter_length
+    faddp               v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    faddp               v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    st1                 {v0.S}[0], [x0], #4                            // write accumulator
+    ret
+endfunc
+
+function ff_resample_common_apply_filter_x8_float_neon, export=1
+    movi                v0.4S, #0                                      // accumulator
+1:  ld1                 {v1.4S}, [x1], #16                             // src[0..3]
+    ld1                 {v2.4S}, [x2], #16                             // filter[0..3]
+    ld1                 {v3.4S}, [x1], #16                             // src[4..7]
+    ld1                 {v4.4S}, [x2], #16                             // filter[4..7]
+    fmla                v0.4S, v1.4S, v2.4S                            // accumulator += src[0..3] * filter[0..3]
+    fmla                v0.4S, v3.4S, v4.4S                            // accumulator += src[4..7] * filter[4..7]
+    subs                w3, w3, #8                                     // filter_length -= 8
+    b.gt                1b                                             // loop until filter_length
+    faddp               v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    faddp               v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    st1                 {v0.S}[0], [x0], #4                            // write accumulator
+endfunc
+
+function ff_resample_common_apply_filter_x4_s16_neon, export=1
+    movi                v0.4S, #0                                      // accumulator
+1:  ld1                 {v1.4H}, [x1], #8                              // src[0..3]
+    ld1                 {v2.4H}, [x2], #8                              // filter[0..3]
+    smlal               v0.4S, v1.4H, v2.4H                            // accumulator += src[0..3] * filter[0..3]
+    subs                w3, w3, #4                                     // filter_length -= 4
+    b.gt                1b                                             // loop until filter_length
+    addp                v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    addp                v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    st1                 {v0.S}[0], [x0], #4                            // write accumulator
+    ret
+endfunc
+
+function ff_resample_common_apply_filter_x8_s16_neon, export=1
+    movi                v0.4S, #0                                      // accumulator
+1:  ld1                 {v1.8H}, [x1], #16                             // src[0..7]
+    ld1                 {v2.8H}, [x2], #16                             // filter[0..7]
+    smlal               v0.4S, v1.4H, v2.4H                            // accumulator += src[0..3] * filter[0..3]
+    smlal2              v0.4S, v1.8H, v2.8H                            // accumulator += src[4..7] * filter[4..7]
+    subs                w3, w3, #8                                     // filter_length -= 8
+    b.gt                1b                                             // loop until filter_length
+    addp                v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    addp                v0.4S, v0.4S, v0.4S                            // pair adding of the 4x32-bit accumulated values
+    st1                 {v0.S}[0], [x0], #4                            // write accumulator
+    ret
+endfunc