mirror of
https://github.com/ziglang/zig.git
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Remove memcmp and memset from bundled musl and wasi
This commit is contained in:
Yefeng Li
Alex Rønne Petersen
parent
42eb1329b1
commit
aae5560712
115
lib/libc/musl/src/string/aarch64/memset.S
vendored
115
lib/libc/musl/src/string/aarch64/memset.S
vendored
@ -1,115 +0,0 @@
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/*
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* memset - fill memory with a constant byte
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*
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* Copyright (c) 2012-2020, Arm Limited.
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* SPDX-License-Identifier: MIT
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*/
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/* Assumptions:
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*
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* ARMv8-a, AArch64, Advanced SIMD, unaligned accesses.
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*
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*/
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#define dstin x0
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#define val x1
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#define valw w1
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#define count x2
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#define dst x3
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#define dstend x4
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#define zva_val x5
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.global memset
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.type memset,%function
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memset:
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dup v0.16B, valw
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add dstend, dstin, count
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cmp count, 96
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b.hi .Lset_long
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cmp count, 16
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b.hs .Lset_medium
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mov val, v0.D[0]
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/* Set 0..15 bytes. */
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tbz count, 3, 1f
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str val, [dstin]
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str val, [dstend, -8]
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ret
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nop
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1: tbz count, 2, 2f
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str valw, [dstin]
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str valw, [dstend, -4]
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ret
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2: cbz count, 3f
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strb valw, [dstin]
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tbz count, 1, 3f
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strh valw, [dstend, -2]
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3: ret
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/* Set 17..96 bytes. */
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.Lset_medium:
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str q0, [dstin]
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tbnz count, 6, .Lset96
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str q0, [dstend, -16]
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tbz count, 5, 1f
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str q0, [dstin, 16]
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str q0, [dstend, -32]
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1: ret
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.p2align 4
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/* Set 64..96 bytes. Write 64 bytes from the start and
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32 bytes from the end. */
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.Lset96:
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str q0, [dstin, 16]
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stp q0, q0, [dstin, 32]
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stp q0, q0, [dstend, -32]
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ret
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.p2align 4
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.Lset_long:
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and valw, valw, 255
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bic dst, dstin, 15
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str q0, [dstin]
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cmp count, 160
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ccmp valw, 0, 0, hs
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b.ne .Lno_zva
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#ifndef SKIP_ZVA_CHECK
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mrs zva_val, dczid_el0
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and zva_val, zva_val, 31
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cmp zva_val, 4 /* ZVA size is 64 bytes. */
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b.ne .Lno_zva
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#endif
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str q0, [dst, 16]
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stp q0, q0, [dst, 32]
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bic dst, dst, 63
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sub count, dstend, dst /* Count is now 64 too large. */
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sub count, count, 128 /* Adjust count and bias for loop. */
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.p2align 4
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.Lzva_loop:
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add dst, dst, 64
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dc zva, dst
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subs count, count, 64
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b.hi .Lzva_loop
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stp q0, q0, [dstend, -64]
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stp q0, q0, [dstend, -32]
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ret
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.Lno_zva:
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sub count, dstend, dst /* Count is 16 too large. */
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sub dst, dst, 16 /* Dst is biased by -32. */
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sub count, count, 64 + 16 /* Adjust count and bias for loop. */
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.Lno_zva_loop:
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stp q0, q0, [dst, 32]
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stp q0, q0, [dst, 64]!
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subs count, count, 64
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b.hi .Lno_zva_loop
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stp q0, q0, [dstend, -64]
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stp q0, q0, [dstend, -32]
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ret
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.size memset,.-memset
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31
lib/libc/musl/src/string/arm/__aeabi_memset.s
vendored
31
lib/libc/musl/src/string/arm/__aeabi_memset.s
vendored
@ -1,31 +0,0 @@
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.syntax unified
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.global __aeabi_memclr8
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.global __aeabi_memclr4
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.global __aeabi_memclr
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.global __aeabi_memset8
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.global __aeabi_memset4
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.global __aeabi_memset
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.type __aeabi_memclr8,%function
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.type __aeabi_memclr4,%function
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.type __aeabi_memclr,%function
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.type __aeabi_memset8,%function
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.type __aeabi_memset4,%function
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.type __aeabi_memset,%function
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__aeabi_memclr8:
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__aeabi_memclr4:
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__aeabi_memclr:
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movs r2, #0
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__aeabi_memset8:
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__aeabi_memset4:
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__aeabi_memset:
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cmp r1, #0
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beq 2f
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adds r1, r0, r1
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1: strb r2, [r0]
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adds r0, r0, #1
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cmp r1, r0
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bne 1b
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2: bx lr
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76
lib/libc/musl/src/string/i386/memset.s
vendored
76
lib/libc/musl/src/string/i386/memset.s
vendored
@ -1,76 +0,0 @@
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.global memset
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.type memset,@function
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memset:
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mov 12(%esp),%ecx
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cmp $62,%ecx
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ja 2f
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mov 8(%esp),%dl
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mov 4(%esp),%eax
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test %ecx,%ecx
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jz 1f
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mov %dl,%dh
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mov %dl,(%eax)
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mov %dl,-1(%eax,%ecx)
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cmp $2,%ecx
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jbe 1f
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mov %dx,1(%eax)
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mov %dx,(-1-2)(%eax,%ecx)
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cmp $6,%ecx
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jbe 1f
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shl $16,%edx
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mov 8(%esp),%dl
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mov 8(%esp),%dh
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mov %edx,(1+2)(%eax)
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mov %edx,(-1-2-4)(%eax,%ecx)
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cmp $14,%ecx
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jbe 1f
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mov %edx,(1+2+4)(%eax)
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mov %edx,(1+2+4+4)(%eax)
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mov %edx,(-1-2-4-8)(%eax,%ecx)
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mov %edx,(-1-2-4-4)(%eax,%ecx)
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cmp $30,%ecx
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jbe 1f
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mov %edx,(1+2+4+8)(%eax)
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mov %edx,(1+2+4+8+4)(%eax)
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mov %edx,(1+2+4+8+8)(%eax)
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mov %edx,(1+2+4+8+12)(%eax)
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mov %edx,(-1-2-4-8-16)(%eax,%ecx)
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mov %edx,(-1-2-4-8-12)(%eax,%ecx)
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mov %edx,(-1-2-4-8-8)(%eax,%ecx)
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mov %edx,(-1-2-4-8-4)(%eax,%ecx)
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1: ret
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2: movzbl 8(%esp),%eax
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mov %edi,12(%esp)
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imul $0x1010101,%eax
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mov 4(%esp),%edi
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test $15,%edi
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mov %eax,-4(%edi,%ecx)
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jnz 2f
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1: shr $2, %ecx
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rep
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stosl
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mov 4(%esp),%eax
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mov 12(%esp),%edi
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ret
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2: xor %edx,%edx
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sub %edi,%edx
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and $15,%edx
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mov %eax,(%edi)
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mov %eax,4(%edi)
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mov %eax,8(%edi)
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mov %eax,12(%edi)
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sub %edx,%ecx
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add %edx,%edi
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jmp 1b
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8
lib/libc/musl/src/string/memcmp.c
vendored
8
lib/libc/musl/src/string/memcmp.c
vendored
@ -1,8 +0,0 @@
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#include <string.h>
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int memcmp(const void *vl, const void *vr, size_t n)
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{
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const unsigned char *l=vl, *r=vr;
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for (; n && *l == *r; n--, l++, r++);
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return n ? *l-*r : 0;
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}
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90
lib/libc/musl/src/string/memset.c
vendored
90
lib/libc/musl/src/string/memset.c
vendored
@ -1,90 +0,0 @@
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#include <string.h>
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#include <stdint.h>
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void *memset(void *dest, int c, size_t n)
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{
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unsigned char *s = dest;
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size_t k;
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/* Fill head and tail with minimal branching. Each
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* conditional ensures that all the subsequently used
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* offsets are well-defined and in the dest region. */
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if (!n) return dest;
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s[0] = c;
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s[n-1] = c;
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if (n <= 2) return dest;
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s[1] = c;
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s[2] = c;
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s[n-2] = c;
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s[n-3] = c;
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if (n <= 6) return dest;
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s[3] = c;
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s[n-4] = c;
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if (n <= 8) return dest;
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/* Advance pointer to align it at a 4-byte boundary,
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* and truncate n to a multiple of 4. The previous code
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* already took care of any head/tail that get cut off
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* by the alignment. */
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k = -(uintptr_t)s & 3;
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s += k;
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n -= k;
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n &= -4;
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#ifdef __GNUC__
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typedef uint32_t __attribute__((__may_alias__)) u32;
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typedef uint64_t __attribute__((__may_alias__)) u64;
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u32 c32 = ((u32)-1)/255 * (unsigned char)c;
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/* In preparation to copy 32 bytes at a time, aligned on
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* an 8-byte bounary, fill head/tail up to 28 bytes each.
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* As in the initial byte-based head/tail fill, each
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* conditional below ensures that the subsequent offsets
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* are valid (e.g. !(n<=24) implies n>=28). */
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*(u32 *)(s+0) = c32;
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*(u32 *)(s+n-4) = c32;
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if (n <= 8) return dest;
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*(u32 *)(s+4) = c32;
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*(u32 *)(s+8) = c32;
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*(u32 *)(s+n-12) = c32;
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*(u32 *)(s+n-8) = c32;
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if (n <= 24) return dest;
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*(u32 *)(s+12) = c32;
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*(u32 *)(s+16) = c32;
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*(u32 *)(s+20) = c32;
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*(u32 *)(s+24) = c32;
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*(u32 *)(s+n-28) = c32;
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*(u32 *)(s+n-24) = c32;
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*(u32 *)(s+n-20) = c32;
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*(u32 *)(s+n-16) = c32;
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/* Align to a multiple of 8 so we can fill 64 bits at a time,
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* and avoid writing the same bytes twice as much as is
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* practical without introducing additional branching. */
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k = 24 + ((uintptr_t)s & 4);
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s += k;
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n -= k;
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/* If this loop is reached, 28 tail bytes have already been
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* filled, so any remainder when n drops below 32 can be
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* safely ignored. */
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u64 c64 = c32 | ((u64)c32 << 32);
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for (; n >= 32; n-=32, s+=32) {
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*(u64 *)(s+0) = c64;
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*(u64 *)(s+8) = c64;
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*(u64 *)(s+16) = c64;
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*(u64 *)(s+24) = c64;
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}
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#else
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/* Pure C fallback with no aliasing violations. */
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for (; n; n--, s++) *s = c;
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#endif
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return dest;
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}
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72
lib/libc/musl/src/string/x86_64/memset.s
vendored
72
lib/libc/musl/src/string/x86_64/memset.s
vendored
@ -1,72 +0,0 @@
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.global memset
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.type memset,@function
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memset:
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movzbq %sil,%rax
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mov $0x101010101010101,%r8
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imul %r8,%rax
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cmp $126,%rdx
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ja 2f
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test %edx,%edx
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jz 1f
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mov %sil,(%rdi)
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mov %sil,-1(%rdi,%rdx)
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cmp $2,%edx
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jbe 1f
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mov %ax,1(%rdi)
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mov %ax,(-1-2)(%rdi,%rdx)
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cmp $6,%edx
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jbe 1f
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mov %eax,(1+2)(%rdi)
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mov %eax,(-1-2-4)(%rdi,%rdx)
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cmp $14,%edx
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jbe 1f
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mov %rax,(1+2+4)(%rdi)
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mov %rax,(-1-2-4-8)(%rdi,%rdx)
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cmp $30,%edx
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jbe 1f
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mov %rax,(1+2+4+8)(%rdi)
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mov %rax,(1+2+4+8+8)(%rdi)
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mov %rax,(-1-2-4-8-16)(%rdi,%rdx)
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mov %rax,(-1-2-4-8-8)(%rdi,%rdx)
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cmp $62,%edx
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jbe 1f
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mov %rax,(1+2+4+8+16)(%rdi)
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mov %rax,(1+2+4+8+16+8)(%rdi)
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mov %rax,(1+2+4+8+16+16)(%rdi)
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mov %rax,(1+2+4+8+16+24)(%rdi)
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mov %rax,(-1-2-4-8-16-32)(%rdi,%rdx)
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mov %rax,(-1-2-4-8-16-24)(%rdi,%rdx)
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mov %rax,(-1-2-4-8-16-16)(%rdi,%rdx)
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|
||||||
mov %rax,(-1-2-4-8-16-8)(%rdi,%rdx)
|
|
||||||
|
|
||||||
1: mov %rdi,%rax
|
|
||||||
ret
|
|
||||||
|
|
||||||
2: test $15,%edi
|
|
||||||
mov %rdi,%r8
|
|
||||||
mov %rax,-8(%rdi,%rdx)
|
|
||||||
mov %rdx,%rcx
|
|
||||||
jnz 2f
|
|
||||||
|
|
||||||
1: shr $3,%rcx
|
|
||||||
rep
|
|
||||||
stosq
|
|
||||||
mov %r8,%rax
|
|
||||||
ret
|
|
||||||
|
|
||||||
2: xor %edx,%edx
|
|
||||||
sub %edi,%edx
|
|
||||||
and $15,%edx
|
|
||||||
mov %rax,(%rdi)
|
|
||||||
mov %rax,8(%rdi)
|
|
||||||
sub %rdx,%rcx
|
|
||||||
add %rdx,%rdi
|
|
||||||
jmp 1b
|
|
||||||
@ -1,43 +0,0 @@
|
|||||||
#include <string.h>
|
|
||||||
|
|
||||||
#ifdef __wasm_simd128__
|
|
||||||
#include <wasm_simd128.h>
|
|
||||||
#endif
|
|
||||||
|
|
||||||
int memcmp(const void *vl, const void *vr, size_t n)
|
|
||||||
{
|
|
||||||
#if defined(__wasm_simd128__) && defined(__wasilibc_simd_string)
|
|
||||||
if (n >= sizeof(v128_t)) {
|
|
||||||
// memcmp is allowed to read up to n bytes from each object.
|
|
||||||
// Find the first different character in the objects.
|
|
||||||
// Unaligned loads handle the case where the objects
|
|
||||||
// have mismatching alignments.
|
|
||||||
const v128_t *v1 = (v128_t *)vl;
|
|
||||||
const v128_t *v2 = (v128_t *)vr;
|
|
||||||
while (n) {
|
|
||||||
const v128_t cmp = wasm_i8x16_eq(wasm_v128_load(v1), wasm_v128_load(v2));
|
|
||||||
// Bitmask is slow on AArch64, all_true is much faster.
|
|
||||||
if (!wasm_i8x16_all_true(cmp)) {
|
|
||||||
// Find the offset of the first zero bit (little-endian).
|
|
||||||
size_t ctz = __builtin_ctz(~wasm_i8x16_bitmask(cmp));
|
|
||||||
const unsigned char *u1 = (unsigned char *)v1 + ctz;
|
|
||||||
const unsigned char *u2 = (unsigned char *)v2 + ctz;
|
|
||||||
// This may help the compiler if the function is inlined.
|
|
||||||
__builtin_assume(*u1 - *u2 != 0);
|
|
||||||
return *u1 - *u2;
|
|
||||||
}
|
|
||||||
// This makes n a multiple of sizeof(v128_t)
|
|
||||||
// for every iteration except the first.
|
|
||||||
size_t align = (n - 1) % sizeof(v128_t) + 1;
|
|
||||||
v1 = (v128_t *)((char *)v1 + align);
|
|
||||||
v2 = (v128_t *)((char *)v2 + align);
|
|
||||||
n -= align;
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
const unsigned char *l=vl, *r=vr;
|
|
||||||
for (; n && *l == *r; n--, l++, r++);
|
|
||||||
return n ? *l-*r : 0;
|
|
||||||
}
|
|
||||||
@ -1,94 +0,0 @@
|
|||||||
#include <string.h>
|
|
||||||
#include <stdint.h>
|
|
||||||
|
|
||||||
void *memset(void *dest, int c, size_t n)
|
|
||||||
{
|
|
||||||
#if defined(__wasm_bulk_memory__)
|
|
||||||
if (n > BULK_MEMORY_THRESHOLD)
|
|
||||||
return __builtin_memset(dest, c, n);
|
|
||||||
#endif
|
|
||||||
unsigned char *s = dest;
|
|
||||||
size_t k;
|
|
||||||
|
|
||||||
/* Fill head and tail with minimal branching. Each
|
|
||||||
* conditional ensures that all the subsequently used
|
|
||||||
* offsets are well-defined and in the dest region. */
|
|
||||||
|
|
||||||
if (!n) return dest;
|
|
||||||
s[0] = c;
|
|
||||||
s[n-1] = c;
|
|
||||||
if (n <= 2) return dest;
|
|
||||||
s[1] = c;
|
|
||||||
s[2] = c;
|
|
||||||
s[n-2] = c;
|
|
||||||
s[n-3] = c;
|
|
||||||
if (n <= 6) return dest;
|
|
||||||
s[3] = c;
|
|
||||||
s[n-4] = c;
|
|
||||||
if (n <= 8) return dest;
|
|
||||||
|
|
||||||
/* Advance pointer to align it at a 4-byte boundary,
|
|
||||||
* and truncate n to a multiple of 4. The previous code
|
|
||||||
* already took care of any head/tail that get cut off
|
|
||||||
* by the alignment. */
|
|
||||||
|
|
||||||
k = -(uintptr_t)s & 3;
|
|
||||||
s += k;
|
|
||||||
n -= k;
|
|
||||||
n &= -4;
|
|
||||||
|
|
||||||
#ifdef __GNUC__
|
|
||||||
typedef uint32_t __attribute__((__may_alias__)) u32;
|
|
||||||
typedef uint64_t __attribute__((__may_alias__)) u64;
|
|
||||||
|
|
||||||
u32 c32 = ((u32)-1)/255 * (unsigned char)c;
|
|
||||||
|
|
||||||
/* In preparation to copy 32 bytes at a time, aligned on
|
|
||||||
* an 8-byte bounary, fill head/tail up to 28 bytes each.
|
|
||||||
* As in the initial byte-based head/tail fill, each
|
|
||||||
* conditional below ensures that the subsequent offsets
|
|
||||||
* are valid (e.g. !(n<=24) implies n>=28). */
|
|
||||||
|
|
||||||
*(u32 *)(s+0) = c32;
|
|
||||||
*(u32 *)(s+n-4) = c32;
|
|
||||||
if (n <= 8) return dest;
|
|
||||||
*(u32 *)(s+4) = c32;
|
|
||||||
*(u32 *)(s+8) = c32;
|
|
||||||
*(u32 *)(s+n-12) = c32;
|
|
||||||
*(u32 *)(s+n-8) = c32;
|
|
||||||
if (n <= 24) return dest;
|
|
||||||
*(u32 *)(s+12) = c32;
|
|
||||||
*(u32 *)(s+16) = c32;
|
|
||||||
*(u32 *)(s+20) = c32;
|
|
||||||
*(u32 *)(s+24) = c32;
|
|
||||||
*(u32 *)(s+n-28) = c32;
|
|
||||||
*(u32 *)(s+n-24) = c32;
|
|
||||||
*(u32 *)(s+n-20) = c32;
|
|
||||||
*(u32 *)(s+n-16) = c32;
|
|
||||||
|
|
||||||
/* Align to a multiple of 8 so we can fill 64 bits at a time,
|
|
||||||
* and avoid writing the same bytes twice as much as is
|
|
||||||
* practical without introducing additional branching. */
|
|
||||||
|
|
||||||
k = 24 + ((uintptr_t)s & 4);
|
|
||||||
s += k;
|
|
||||||
n -= k;
|
|
||||||
|
|
||||||
/* If this loop is reached, 28 tail bytes have already been
|
|
||||||
* filled, so any remainder when n drops below 32 can be
|
|
||||||
* safely ignored. */
|
|
||||||
|
|
||||||
u64 c64 = c32 | ((u64)c32 << 32);
|
|
||||||
for (; n >= 32; n-=32, s+=32) {
|
|
||||||
*(u64 *)(s+0) = c64;
|
|
||||||
*(u64 *)(s+8) = c64;
|
|
||||||
*(u64 *)(s+16) = c64;
|
|
||||||
*(u64 *)(s+24) = c64;
|
|
||||||
}
|
|
||||||
#else
|
|
||||||
/* Pure C fallback with no aliasing violations. */
|
|
||||||
for (; n; n--, s++) *s = c;
|
|
||||||
#endif
|
|
||||||
|
|
||||||
return dest;
|
|
||||||
}
|
|
||||||
@ -1786,20 +1786,15 @@ const src_files = [_][]const u8{
|
|||||||
"musl/src/stdlib/strtol.c",
|
"musl/src/stdlib/strtol.c",
|
||||||
"musl/src/stdlib/wcstod.c",
|
"musl/src/stdlib/wcstod.c",
|
||||||
"musl/src/stdlib/wcstol.c",
|
"musl/src/stdlib/wcstol.c",
|
||||||
"musl/src/string/aarch64/memset.S",
|
|
||||||
"musl/src/string/arm/__aeabi_memset.s",
|
|
||||||
"musl/src/string/bcmp.c",
|
"musl/src/string/bcmp.c",
|
||||||
"musl/src/string/bcopy.c",
|
"musl/src/string/bcopy.c",
|
||||||
"musl/src/string/explicit_bzero.c",
|
"musl/src/string/explicit_bzero.c",
|
||||||
"musl/src/string/i386/memset.s",
|
|
||||||
"musl/src/string/index.c",
|
"musl/src/string/index.c",
|
||||||
"musl/src/string/memccpy.c",
|
"musl/src/string/memccpy.c",
|
||||||
"musl/src/string/memchr.c",
|
"musl/src/string/memchr.c",
|
||||||
"musl/src/string/memcmp.c",
|
|
||||||
"musl/src/string/memmem.c",
|
"musl/src/string/memmem.c",
|
||||||
"musl/src/string/mempcpy.c",
|
"musl/src/string/mempcpy.c",
|
||||||
"musl/src/string/memrchr.c",
|
"musl/src/string/memrchr.c",
|
||||||
"musl/src/string/memset.c",
|
|
||||||
"musl/src/string/rindex.c",
|
"musl/src/string/rindex.c",
|
||||||
"musl/src/string/stpcpy.c",
|
"musl/src/string/stpcpy.c",
|
||||||
"musl/src/string/stpncpy.c",
|
"musl/src/string/stpncpy.c",
|
||||||
@ -1855,7 +1850,6 @@ const src_files = [_][]const u8{
|
|||||||
"musl/src/string/wmemcpy.c",
|
"musl/src/string/wmemcpy.c",
|
||||||
"musl/src/string/wmemmove.c",
|
"musl/src/string/wmemmove.c",
|
||||||
"musl/src/string/wmemset.c",
|
"musl/src/string/wmemset.c",
|
||||||
"musl/src/string/x86_64/memset.s",
|
|
||||||
"musl/src/temp/mkdtemp.c",
|
"musl/src/temp/mkdtemp.c",
|
||||||
"musl/src/temp/mkostemp.c",
|
"musl/src/temp/mkostemp.c",
|
||||||
"musl/src/temp/mkostemps.c",
|
"musl/src/temp/mkostemps.c",
|
||||||
|
|||||||
@ -1221,9 +1221,7 @@ const libc_top_half_src_files = [_][]const u8{
|
|||||||
"wasi/libc-top-half/musl/src/stdlib/wcstod.c",
|
"wasi/libc-top-half/musl/src/stdlib/wcstod.c",
|
||||||
"wasi/libc-top-half/musl/src/stdlib/wcstol.c",
|
"wasi/libc-top-half/musl/src/stdlib/wcstol.c",
|
||||||
"wasi/libc-top-half/musl/src/string/memchr.c",
|
"wasi/libc-top-half/musl/src/string/memchr.c",
|
||||||
"wasi/libc-top-half/musl/src/string/memcmp.c",
|
|
||||||
"wasi/libc-top-half/musl/src/string/memrchr.c",
|
"wasi/libc-top-half/musl/src/string/memrchr.c",
|
||||||
"wasi/libc-top-half/musl/src/string/memset.c",
|
|
||||||
"wasi/libc-top-half/musl/src/string/strchrnul.c",
|
"wasi/libc-top-half/musl/src/string/strchrnul.c",
|
||||||
"wasi/libc-top-half/musl/src/thread/pthread_attr_get.c",
|
"wasi/libc-top-half/musl/src/thread/pthread_attr_get.c",
|
||||||
"wasi/libc-top-half/musl/src/thread/pthread_attr_setguardsize.c",
|
"wasi/libc-top-half/musl/src/thread/pthread_attr_setguardsize.c",
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user