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Diffstat (limited to 'na/lib/string/aarch64/memset.S')
-rw-r--r--na/lib/string/aarch64/memset.S115
1 files changed, 0 insertions, 115 deletions
diff --git a/na/lib/string/aarch64/memset.S b/na/lib/string/aarch64/memset.S
deleted file mode 100644
index f0d29b7..0000000
--- a/na/lib/string/aarch64/memset.S
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * memset - fill memory with a constant byte
- *
- * Copyright (c) 2012-2020, Arm Limited.
- * SPDX-License-Identifier: MIT
- */
-
-/* Assumptions:
- *
- * ARMv8-a, AArch64, Advanced SIMD, unaligned accesses.
- *
- */
-
-#define dstin x0
-#define val x1
-#define valw w1
-#define count x2
-#define dst x3
-#define dstend x4
-#define zva_val x5
-
-.global memset
-.type memset,%function
-memset:
-
- dup v0.16B, valw
- add dstend, dstin, count
-
- cmp count, 96
- b.hi .Lset_long
- cmp count, 16
- b.hs .Lset_medium
- mov val, v0.D[0]
-
- /* Set 0..15 bytes. */
- tbz count, 3, 1f
- str val, [dstin]
- str val, [dstend, -8]
- ret
- nop
-1: tbz count, 2, 2f
- str valw, [dstin]
- str valw, [dstend, -4]
- ret
-2: cbz count, 3f
- strb valw, [dstin]
- tbz count, 1, 3f
- strh valw, [dstend, -2]
-3: ret
-
- /* Set 17..96 bytes. */
-.Lset_medium:
- str q0, [dstin]
- tbnz count, 6, .Lset96
- str q0, [dstend, -16]
- tbz count, 5, 1f
- str q0, [dstin, 16]
- str q0, [dstend, -32]
-1: ret
-
- .p2align 4
- /* Set 64..96 bytes. Write 64 bytes from the start and
- 32 bytes from the end. */
-.Lset96:
- str q0, [dstin, 16]
- stp q0, q0, [dstin, 32]
- stp q0, q0, [dstend, -32]
- ret
-
- .p2align 4
-.Lset_long:
- and valw, valw, 255
- bic dst, dstin, 15
- str q0, [dstin]
- cmp count, 160
- ccmp valw, 0, 0, hs
- b.ne .Lno_zva
-
-#ifndef SKIP_ZVA_CHECK
- mrs zva_val, dczid_el0
- and zva_val, zva_val, 31
- cmp zva_val, 4 /* ZVA size is 64 bytes. */
- b.ne .Lno_zva
-#endif
- str q0, [dst, 16]
- stp q0, q0, [dst, 32]
- bic dst, dst, 63
- sub count, dstend, dst /* Count is now 64 too large. */
- sub count, count, 128 /* Adjust count and bias for loop. */
-
- .p2align 4
-.Lzva_loop:
- add dst, dst, 64
- dc zva, dst
- subs count, count, 64
- b.hi .Lzva_loop
- stp q0, q0, [dstend, -64]
- stp q0, q0, [dstend, -32]
- ret
-
-.Lno_zva:
- sub count, dstend, dst /* Count is 16 too large. */
- sub dst, dst, 16 /* Dst is biased by -32. */
- sub count, count, 64 + 16 /* Adjust count and bias for loop. */
-.Lno_zva_loop:
- stp q0, q0, [dst, 32]
- stp q0, q0, [dst, 64]!
- subs count, count, 64
- b.hi .Lno_zva_loop
- stp q0, q0, [dstend, -64]
- stp q0, q0, [dstend, -32]
- ret
-
-.size memset,.-memset
-