Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright 2002, 2003 Andi Kleen, SuSE Labs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * License.  See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * for more details. No warranty for anything given at all.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <asm/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <asm/asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Checksum copy with exception handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * On exceptions src_err_ptr or dst_err_ptr is set to -EFAULT and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * destination is zeroed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * Input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * rdi  source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * rsi  destination
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * edx  len (32bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * Output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * eax  64bit sum. undefined in case of exception.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * Wrappers need to take care of valid exception sum and zeroing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * They also should align source or destination to 8 bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	.macro source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 10:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	_ASM_EXTABLE_UA(10b, .Lfault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	.macro dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 20:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	_ASM_EXTABLE_UA(20b, .Lfault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) SYM_FUNC_START(csum_partial_copy_generic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	subq  $5*8, %rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	movq  %rbx, 0*8(%rsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	movq  %r12, 1*8(%rsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	movq  %r14, 2*8(%rsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	movq  %r13, 3*8(%rsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	movq  %r15, 4*8(%rsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	movl  $-1, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	xorl  %r9d, %r9d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	movl  %edx, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	cmpl  $8, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	jb    .Lshort
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	testb  $7, %sil
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	jne   .Lunaligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) .Laligned:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	movl  %ecx, %r12d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	shrq  $6, %r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	jz	.Lhandle_tail       /* < 64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	clc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	/* main loop. clear in 64 byte blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	/* r9: zero, r8: temp2, rbx: temp1, rax: sum, rcx: saved length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	/* r11:	temp3, rdx: temp4, r12 loopcnt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	/* r10:	temp5, r15: temp6, r14 temp7, r13 temp8 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	.p2align 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) .Lloop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	movq  (%rdi), %rbx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	movq  8(%rdi), %r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	movq  16(%rdi), %r11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	movq  24(%rdi), %rdx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	movq  32(%rdi), %r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	movq  40(%rdi), %r15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	movq  48(%rdi), %r14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	movq  56(%rdi), %r13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 30:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	 * No _ASM_EXTABLE_UA; this is used for intentional prefetch on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	 * potentially unmapped kernel address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	_ASM_EXTABLE(30b, 2f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	prefetcht0 5*64(%rdi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	adcq  %rbx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	adcq  %r8, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	adcq  %r11, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	adcq  %rdx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	adcq  %r10, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	adcq  %r15, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	adcq  %r14, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	adcq  %r13, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	decl %r12d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	movq %rbx, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	movq %r8, 8(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	movq %r11, 16(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	movq %rdx, 24(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	movq %r10, 32(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	movq %r15, 40(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	movq %r14, 48(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	movq %r13, 56(%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	leaq 64(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	leaq 64(%rsi), %rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	jnz	.Lloop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	adcq  %r9, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	/* do last up to 56 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .Lhandle_tail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	/* ecx:	count, rcx.63: the end result needs to be rol8 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	movq %rcx, %r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	andl $63, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	shrl $3, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	jz	.Lfold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	clc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	.p2align 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .Lloop_8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	movq (%rdi), %rbx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	adcq %rbx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	decl %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	movq %rbx, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	leaq 8(%rsi), %rsi /* preserve carry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	leaq 8(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	jnz	.Lloop_8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	adcq %r9, %rax	/* add in carry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .Lfold:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	/* reduce checksum to 32bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	movl %eax, %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	shrq $32, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	addl %ebx, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	adcl %r9d, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* do last up to 6 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .Lhandle_7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	movl %r10d, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	andl $7, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .L1:				/* .Lshort rejoins the common path here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	shrl $1, %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	jz   .Lhandle_1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	movl $2, %edx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	xorl %ebx, %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	clc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	.p2align 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) .Lloop_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	movw (%rdi), %bx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	adcl %ebx, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	decl %ecx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	movw %bx, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	leaq 2(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	leaq 2(%rsi), %rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	jnz .Lloop_1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	adcl %r9d, %eax	/* add in carry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	/* handle last odd byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .Lhandle_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	testb $1, %r10b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	jz    .Lende
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	xorl  %ebx, %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	movb (%rdi), %bl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	movb %bl, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	addl %ebx, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	adcl %r9d, %eax		/* carry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .Lende:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	testq %r10, %r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	js  .Lwas_odd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .Lout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	movq 0*8(%rsp), %rbx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	movq 1*8(%rsp), %r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	movq 2*8(%rsp), %r14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	movq 3*8(%rsp), %r13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	movq 4*8(%rsp), %r15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	addq $5*8, %rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	ret
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) .Lshort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	movl %ecx, %r10d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	jmp  .L1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) .Lunaligned:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	xorl %ebx, %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	testb $1, %sil
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	jne  .Lodd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 1:	testb $2, %sil
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	je   2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	movw (%rdi), %bx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	movw %bx, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	leaq 2(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	subq $2, %rcx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	leaq 2(%rsi), %rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	addq %rbx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 2:	testb $4, %sil
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	je .Laligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	movl (%rdi), %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	movl %ebx, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	leaq 4(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	subq $4, %rcx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	leaq 4(%rsi), %rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	addq %rbx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	jmp .Laligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .Lodd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	movb (%rdi), %bl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	dest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	movb %bl, (%rsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	leaq 1(%rdi), %rdi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	leaq 1(%rsi), %rsi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	/* decrement, set MSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	leaq -1(%rcx, %rcx), %rcx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	rorq $1, %rcx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	shll $8, %ebx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	addq %rbx, %rax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	jmp 1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) .Lwas_odd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	roll $8, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	jmp .Lout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	/* Exception: just return 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .Lfault:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	xorl %eax, %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	jmp  .Lout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) SYM_FUNC_END(csum_partial_copy_generic)