1 files changed, 150 insertions, 0 deletions
diff --git a/libass/aarch64/be_blur.S b/libass/aarch64/be_blur.S
new file mode 100644
index 0000000..f3a78af
--- /dev/null
+++ b/libass/aarch64/be_blur.S
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2021 rcombs
+ *
+ * This file is part of libass.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "asm.S"
+
+/*
+ * void be_blur(uint8_t *buf, intptr_t stride,
+ *              intptr_t width, intptr_t height, uint16_t *tmp);
+ */
+
+function be_blur_neon
+    sub x1, x1, x2
+    and x1, x1, ~15
+    mov x6, x0
+    mov x7, x4
+    movi v16.16b, 0
+    mov x9, x2
+
+    ld1 {v3.16b}, [x0], #16
+    ushll v4.8h, v3.8b, 0
+
+    ext v5.16b, v16.16b, v4.16b, 14
+    add v5.8h, v5.8h, v4.8h
+
+    ushll2 v0.8h, v3.16b, 0
+    b 1f
+
+0:
+    ld1 {v3.16b}, [x0], #16
+    ushll v4.8h, v3.8b, 0
+    ext v5.16b, v0.16b, v4.16b, 14
+    add v5.8h, v5.8h, v4.8h
+    ushll2 v0.8h, v3.16b, 0
+    ext v3.16b, v1.16b, v5.16b, 2
+    add v3.8h, v3.8h, v1.8h
+    mov v2.8h, v3.8h
+
+    st1 {v2.8h, v3.8h}, [x4], #32
+
+1:
+    ext v1.16b, v4.16b, v0.16b, 14
+    add v1.8h, v1.8h, v0.8h
+    ext v3.16b, v5.16b, v1.16b, 2
+    add v3.8h, v3.8h, v5.8h
+
+    mov v4.8h, v3.8h
+    st1 {v3.8h, v4.8h}, [x4], #32
+
+    subs x2, x2, 16
+    b.hi 0b
+
+    ext v0.16b, v0.16b, v16.16b, 14
+    ext v3.16b, v1.16b, v0.16b, 2
+    add v3.8h, v3.8h, v1.8h
+
+    mov v4.8h, v3.8h
+    st1 {v3.8h, v4.8h}, [x4], #32
+
+    add x0, x0, x1
+    subs x3, x3, 1
+    b.le 3f
+
+0:
+    mov x4, x7
+    mov x2, x9
+    ld1 {v2.16b}, [x0], #16
+    ushll v4.8h, v2.8b, 0
+    ext v5.16b, v16.16b, v4.16b, 14
+    add v5.8h, v5.8h, v4.8h
+    ushll2 v0.8h, v2.16b, 0
+
+    b 2f
+
+1:
+    ld1 {v2.16b}, [x0], #16
+    ushll v4.8h, v2.8b, 0
+    ext v5.16b, v0.16b, v4.16b, 14
+    add v5.8h, v5.8h, v4.8h
+    ushll2 v0.8h, v2.16b, 0
+    ext v2.16b, v1.16b, v5.16b, 2
+    add v6.8h, v2.8h, v1.8h
+
+    ld1 {v1.8h, v2.8h}, [x4]
+    add v7.8h, v1.8h, v6.8h
+    st1 {v6.8h, v7.8h}, [x4], #32
+    add v2.8h, v2.8h, v7.8h
+    uqshrn2 v3.16b, v2.8h, 4
+
+    st1 {v3.16b}, [x6], #16
+
+2:
+    ext v1.16b, v4.16b, v0.16b, 14
+    add v1.8h, v1.8h, v0.8h
+    ext v2.16b, v5.16b, v1.16b, 2
+    add v2.8h, v2.8h, v5.8h
+
+    ld1 {v3.8h, v4.8h}, [x4]
+    add v3.8h, v3.8h, v2.8h
+    st1 {v2.8h, v3.8h}, [x4], #32
+    add v4.8h, v4.8h, v3.8h
+    uqshrn v3.8b, v4.8h, 4
+
+    subs x2, x2, 16
+    b.hi 1b
+
+    ext v0.16b, v0.16b, v16.16b, 14
+    ext v2.16b, v1.16b, v0.16b, 2
+    add v4.8h, v2.8h, v1.8h
+
+    ld1 {v0.8h, v1.8h}, [x4]
+    add v5.8h, v0.8h, v4.8h
+    st1 {v4.8h, v5.8h}, [x4], #32
+    add v1.8h, v1.8h, v5.8h
+    uqshrn2 v3.16b, v1.8h, 4
+    st1 {v3.16b}, [x6], #16
+
+    add x0, x0, x1
+    add x6, x6, x1
+    subs x3, x3, 1
+    b.hi 0b
+
+3:
+    mov x2, x9
+    mov x4, x7
+0:
+    ld1 {v2.8h, v3.8h, v4.8h, v5.8h}, [x4], #64
+    add v2.8h, v2.8h, v3.8h
+    uqshrn v2.8b, v2.8h, 4
+    add v3.8h, v4.8h, v5.8h
+    uqshrn2 v2.16b, v3.8h, 4
+    st1 {v2.16b}, [x6], #16
+    subs x2, x2, 16
+    b.hi 0b
+    ret
+endfunc