17e02ad07SMateusz Guzik/*- 27e02ad07SMateusz Guzik * Copyright (c) 2018 The FreeBSD Foundation 37e02ad07SMateusz Guzik * 47e02ad07SMateusz Guzik * This software was developed by Mateusz Guzik <mjg@FreeBSD.org> 57e02ad07SMateusz Guzik * under sponsorship from the FreeBSD Foundation. 67e02ad07SMateusz Guzik * 77e02ad07SMateusz Guzik * Redistribution and use in source and binary forms, with or without 87e02ad07SMateusz Guzik * modification, are permitted provided that the following conditions 97e02ad07SMateusz Guzik * are met: 107e02ad07SMateusz Guzik * 1. Redistributions of source code must retain the above copyright 117e02ad07SMateusz Guzik * notice, this list of conditions and the following disclaimer. 127e02ad07SMateusz Guzik * 2. Redistributions in binary form must reproduce the above copyright 137e02ad07SMateusz Guzik * notice, this list of conditions and the following disclaimer in the 147e02ad07SMateusz Guzik * documentation and/or other materials provided with the distribution. 157e02ad07SMateusz Guzik * 167e02ad07SMateusz Guzik * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 177e02ad07SMateusz Guzik * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 187e02ad07SMateusz Guzik * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 197e02ad07SMateusz Guzik * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 207e02ad07SMateusz Guzik * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 217e02ad07SMateusz Guzik * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 227e02ad07SMateusz Guzik * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 237e02ad07SMateusz Guzik * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 247e02ad07SMateusz Guzik * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 257e02ad07SMateusz Guzik * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 267e02ad07SMateusz Guzik * SUCH DAMAGE. 2791c09a38SAlan Cox */ 2891c09a38SAlan Cox 2991c09a38SAlan Cox#include <machine/asm.h> 30*0db6aef4SMateusz Guzik/* 31*0db6aef4SMateusz Guzik * Note: this routine was written with kernel use in mind (read: no simd), 32*0db6aef4SMateusz Guzik * it is only present in userspace as a temporary measure until something 33*0db6aef4SMateusz Guzik * better gets imported. 34*0db6aef4SMateusz Guzik */ 35*0db6aef4SMateusz Guzik 36ad2ff705SMateusz Guzik#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ 37ad2ff705SMateusz Guzik 386fff6344SMateusz Guzik.macro MEMSET erms 39ad2ff705SMateusz Guzik movq %rdi,%rax 4091c09a38SAlan Cox movq %rdx,%rcx 417e02ad07SMateusz Guzik movzbq %sil,%r8 42ad2ff705SMateusz Guzik movabs $0x0101010101010101,%r10 43ad2ff705SMateusz Guzik imulq %r8,%r10 44167374a1SMateusz Guzik 45167374a1SMateusz Guzik cmpq $32,%rcx 46088ac3efSMateusz Guzik jbe 101632f 47167374a1SMateusz Guzik 48167374a1SMateusz Guzik cmpq $256,%rcx 49167374a1SMateusz Guzik ja 1256f 50167374a1SMateusz Guzik 51164c3b81SMateusz Guzik ALIGN_TEXT 52088ac3efSMateusz Guzik103200: 53ad2ff705SMateusz Guzik movq %r10,(%rdi) 54ad2ff705SMateusz Guzik movq %r10,8(%rdi) 55ad2ff705SMateusz Guzik movq %r10,16(%rdi) 56ad2ff705SMateusz Guzik movq %r10,24(%rdi) 57167374a1SMateusz Guzik leaq 32(%rdi),%rdi 58167374a1SMateusz Guzik subq $32,%rcx 59167374a1SMateusz Guzik cmpq $32,%rcx 60088ac3efSMateusz Guzik ja 103200b 61167374a1SMateusz Guzik cmpb $16,%cl 62088ac3efSMateusz Guzik ja 201632f 63088ac3efSMateusz Guzik movq %r10,-16(%rdi,%rcx) 64088ac3efSMateusz Guzik movq %r10,-8(%rdi,%rcx) 65088ac3efSMateusz Guzik ret 66088ac3efSMateusz Guzik ALIGN_TEXT 67088ac3efSMateusz Guzik101632: 68088ac3efSMateusz Guzik cmpb $16,%cl 69088ac3efSMateusz Guzik jl 100816f 70088ac3efSMateusz Guzik201632: 71ad2ff705SMateusz Guzik movq %r10,(%rdi) 72ad2ff705SMateusz Guzik movq %r10,8(%rdi) 73088ac3efSMateusz Guzik movq %r10,-16(%rdi,%rcx) 74088ac3efSMateusz Guzik movq %r10,-8(%rdi,%rcx) 75088ac3efSMateusz Guzik ret 76088ac3efSMateusz Guzik ALIGN_TEXT 77088ac3efSMateusz Guzik100816: 78167374a1SMateusz Guzik cmpb $8,%cl 79088ac3efSMateusz Guzik jl 100408f 80ad2ff705SMateusz Guzik movq %r10,(%rdi) 81088ac3efSMateusz Guzik movq %r10,-8(%rdi,%rcx) 82088ac3efSMateusz Guzik ret 83088ac3efSMateusz Guzik ALIGN_TEXT 84088ac3efSMateusz Guzik100408: 85167374a1SMateusz Guzik cmpb $4,%cl 86088ac3efSMateusz Guzik jl 100204f 87ad2ff705SMateusz Guzik movl %r10d,(%rdi) 88088ac3efSMateusz Guzik movl %r10d,-4(%rdi,%rcx) 89088ac3efSMateusz Guzik ret 90088ac3efSMateusz Guzik ALIGN_TEXT 91088ac3efSMateusz Guzik100204: 92167374a1SMateusz Guzik cmpb $2,%cl 93088ac3efSMateusz Guzik jl 100001f 94ad2ff705SMateusz Guzik movw %r10w,(%rdi) 95088ac3efSMateusz Guzik movw %r10w,-2(%rdi,%rcx) 96088ac3efSMateusz Guzik ret 97088ac3efSMateusz Guzik ALIGN_TEXT 98088ac3efSMateusz Guzik100001: 99088ac3efSMateusz Guzik cmpb $0,%cl 100088ac3efSMateusz Guzik je 100000f 101ad2ff705SMateusz Guzik movb %r10b,(%rdi) 102088ac3efSMateusz Guzik100000: 10391c09a38SAlan Cox ret 104ad2ff705SMateusz Guzik ALIGN_TEXT 105167374a1SMateusz Guzik1256: 106ad2ff705SMateusz Guzik movq %rdi,%r9 107ad2ff705SMateusz Guzik movq %r10,%rax 108ad2ff705SMateusz Guzik testl $15,%edi 109ad2ff705SMateusz Guzik jnz 3f 110ad2ff705SMateusz Guzik1: 111167374a1SMateusz Guzik.if \erms == 1 1127e02ad07SMateusz Guzik rep 1137e02ad07SMateusz Guzik stosb 114ad2ff705SMateusz Guzik movq %r9,%rax 115167374a1SMateusz Guzik.else 116ad2ff705SMateusz Guzik movq %rcx,%rdx 117167374a1SMateusz Guzik shrq $3,%rcx 118167374a1SMateusz Guzik rep 119167374a1SMateusz Guzik stosq 1207e02ad07SMateusz Guzik movq %r9,%rax 121ad2ff705SMateusz Guzik andl $7,%edx 122ad2ff705SMateusz Guzik jnz 2f 1237e02ad07SMateusz Guzik ret 124ad2ff705SMateusz Guzik2: 125ad2ff705SMateusz Guzik movq %r10,-8(%rdi,%rdx) 126ad2ff705SMateusz Guzik.endif 127ad2ff705SMateusz Guzik ret 128ad2ff705SMateusz Guzik ALIGN_TEXT 129ad2ff705SMateusz Guzik3: 130ad2ff705SMateusz Guzik movq %r10,(%rdi) 131ad2ff705SMateusz Guzik movq %r10,8(%rdi) 132ad2ff705SMateusz Guzik movq %rdi,%r8 133ad2ff705SMateusz Guzik andq $15,%r8 134ad2ff705SMateusz Guzik leaq -16(%rcx,%r8),%rcx 135ad2ff705SMateusz Guzik neg %r8 136ad2ff705SMateusz Guzik leaq 16(%rdi,%r8),%rdi 137ad2ff705SMateusz Guzik jmp 1b 1387e02ad07SMateusz Guzik.endm 1397e02ad07SMateusz Guzik 140088ac3efSMateusz Guzik 1417e02ad07SMateusz GuzikENTRY(memset) 1426fff6344SMateusz Guzik MEMSET erms=0 1435d053f46SPeter WemmEND(memset) 14493ab7586SKonstantin Belousov 14593ab7586SKonstantin Belousov .section .note.GNU-stack,"",%progbits 146