mirror of https://gitee.com/openkylin/linux.git
137 lines
2.4 KiB
ArmAsm
137 lines
2.4 KiB
ArmAsm
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// SPDX-License-Identifier: GPL-2.0
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/*
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* PA-RISC assembly string functions
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*
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* Copyright (C) 2019 Helge Deller <deller@gmx.de>
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*/
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#include <asm/assembly.h>
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#include <linux/linkage.h>
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.section .text.hot
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.level PA_ASM_LEVEL
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t0 = r20
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t1 = r21
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t2 = r22
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ENTRY_CFI(strlen, frame=0,no_calls)
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or,COND(<>) arg0,r0,ret0
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b,l,n .Lstrlen_null_ptr,r0
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depwi 0,31,2,ret0
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cmpb,COND(<>) arg0,ret0,.Lstrlen_not_aligned
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ldw,ma 4(ret0),t0
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cmpib,tr 0,r0,.Lstrlen_loop
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uxor,nbz r0,t0,r0
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.Lstrlen_not_aligned:
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uaddcm arg0,ret0,t1
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shladd t1,3,r0,t1
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mtsar t1
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depwi -1,%sar,32,t0
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uxor,nbz r0,t0,r0
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.Lstrlen_loop:
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b,l,n .Lstrlen_end_loop,r0
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ldw,ma 4(ret0),t0
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cmpib,tr 0,r0,.Lstrlen_loop
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uxor,nbz r0,t0,r0
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.Lstrlen_end_loop:
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extrw,u,<> t0,7,8,r0
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addib,tr,n -3,ret0,.Lstrlen_out
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extrw,u,<> t0,15,8,r0
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addib,tr,n -2,ret0,.Lstrlen_out
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extrw,u,<> t0,23,8,r0
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addi -1,ret0,ret0
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.Lstrlen_out:
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bv r0(rp)
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uaddcm ret0,arg0,ret0
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.Lstrlen_null_ptr:
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bv,n r0(rp)
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ENDPROC_CFI(strlen)
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ENTRY_CFI(strcpy, frame=0,no_calls)
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ldb 0(arg1),t0
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stb t0,0(arg0)
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ldo 0(arg0),ret0
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ldo 1(arg1),t1
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cmpb,= r0,t0,2f
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ldo 1(arg0),t2
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1: ldb 0(t1),arg1
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stb arg1,0(t2)
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ldo 1(t1),t1
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cmpb,<> r0,arg1,1b
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ldo 1(t2),t2
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2: bv,n r0(rp)
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ENDPROC_CFI(strcpy)
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ENTRY_CFI(strncpy, frame=0,no_calls)
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ldb 0(arg1),t0
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stb t0,0(arg0)
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ldo 1(arg1),t1
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ldo 0(arg0),ret0
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cmpb,= r0,t0,2f
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ldo 1(arg0),arg1
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1: ldo -1(arg2),arg2
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cmpb,COND(=),n r0,arg2,2f
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ldb 0(t1),arg0
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stb arg0,0(arg1)
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ldo 1(t1),t1
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cmpb,<> r0,arg0,1b
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ldo 1(arg1),arg1
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2: bv,n r0(rp)
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ENDPROC_CFI(strncpy)
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ENTRY_CFI(strcat, frame=0,no_calls)
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ldb 0(arg0),t0
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cmpb,= t0,r0,2f
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ldo 0(arg0),ret0
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ldo 1(arg0),arg0
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1: ldb 0(arg0),t1
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cmpb,<>,n r0,t1,1b
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ldo 1(arg0),arg0
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2: ldb 0(arg1),t2
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stb t2,0(arg0)
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ldo 1(arg0),arg0
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ldb 0(arg1),t0
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cmpb,<> r0,t0,2b
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ldo 1(arg1),arg1
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bv,n r0(rp)
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ENDPROC_CFI(strcat)
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ENTRY_CFI(memset, frame=0,no_calls)
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copy arg0,ret0
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cmpb,COND(=) r0,arg0,4f
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copy arg0,t2
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cmpb,COND(=) r0,arg2,4f
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ldo -1(arg2),arg3
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subi -1,arg3,t0
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subi 0,t0,t1
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cmpiclr,COND(>=) 0,t1,arg2
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ldo -1(t1),arg2
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extru arg2,31,2,arg0
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2: stb arg1,0(t2)
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ldo 1(t2),t2
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addib,>= -1,arg0,2b
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ldo -1(arg3),arg3
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cmpiclr,COND(<=) 4,arg2,r0
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b,l,n 4f,r0
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#ifdef CONFIG_64BIT
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depd,* r0,63,2,arg2
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#else
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depw r0,31,2,arg2
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#endif
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ldo 1(t2),t2
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3: stb arg1,-1(t2)
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stb arg1,0(t2)
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stb arg1,1(t2)
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stb arg1,2(t2)
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addib,COND(>) -4,arg2,3b
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ldo 4(t2),t2
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4: bv,n r0(rp)
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ENDPROC_CFI(memset)
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.end
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