mirror of git://sourceware.org/git/glibc.git
174 lines
3.7 KiB
ArmAsm
174 lines
3.7 KiB
ArmAsm
/* Set a block of memory to some byte value. For SUN4V Niagara.
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Copyright (C) 2006-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
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#define ASI_P 0x80
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#define ASI_PNF 0x82
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#ifndef XCC
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#define USE_BPR
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#define XCC xcc
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#endif
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#if IS_IN (libc)
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.register %g2,#scratch
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.text
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.align 32
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ENTRY(__memset_niagara1)
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/* %o0=buf, %o1=pat, %o2=len */
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and %o1, 0xff, %o3
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mov %o2, %o1
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sllx %o3, 8, %g1
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or %g1, %o3, %o2
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sllx %o2, 16, %g1
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or %g1, %o2, %o2
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sllx %o2, 32, %g1
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ba,pt %XCC, 1f
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or %g1, %o2, %o2
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clr %o2
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1:
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# ifndef USE_BRP
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srl %o1, 0, %o1
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# endif
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brz,pn %o1, 90f
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mov %o0, %o3
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wr %g0, ASI_P, %asi
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cmp %o1, 15
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blu,pn %XCC, 70f
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andcc %o0, 0x7, %g1
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be,pt %XCC, 2f
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mov 8, %g2
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sub %g2, %g1, %g1
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sub %o1, %g1, %o1
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1: stba %o2, [%o0 + 0x00] %asi
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subcc %g1, 1, %g1
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bne,pt %XCC, 1b
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add %o0, 1, %o0
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2: cmp %o1, 128
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blu,pn %XCC, 60f
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andcc %o0, (64 - 1), %g1
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be,pt %XCC, 40f
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mov 64, %g2
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sub %g2, %g1, %g1
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sub %o1, %g1, %o1
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1: stxa %o2, [%o0 + 0x00] %asi
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subcc %g1, 8, %g1
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bne,pt %XCC, 1b
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add %o0, 8, %o0
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40:
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wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
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andn %o1, (64 - 1), %g1
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sub %o1, %g1, %o1
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andn %g1, (256 - 1), %g2
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brz,pt %g2, 50f
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and %g1, (256 - 1), %g1
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45:
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stxa %o2, [%o0 + 0x00] %asi
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stxa %o2, [%o0 + 0x08] %asi
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stxa %o2, [%o0 + 0x10] %asi
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stxa %o2, [%o0 + 0x18] %asi
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stxa %o2, [%o0 + 0x20] %asi
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stxa %o2, [%o0 + 0x28] %asi
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stxa %o2, [%o0 + 0x30] %asi
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stxa %o2, [%o0 + 0x38] %asi
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stxa %o2, [%o0 + 0x40] %asi
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stxa %o2, [%o0 + 0x48] %asi
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stxa %o2, [%o0 + 0x50] %asi
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stxa %o2, [%o0 + 0x58] %asi
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stxa %o2, [%o0 + 0x60] %asi
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stxa %o2, [%o0 + 0x68] %asi
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stxa %o2, [%o0 + 0x70] %asi
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stxa %o2, [%o0 + 0x78] %asi
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stxa %o2, [%o0 + 0x80] %asi
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stxa %o2, [%o0 + 0x88] %asi
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stxa %o2, [%o0 + 0x90] %asi
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stxa %o2, [%o0 + 0x98] %asi
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stxa %o2, [%o0 + 0xa0] %asi
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stxa %o2, [%o0 + 0xa8] %asi
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stxa %o2, [%o0 + 0xb0] %asi
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stxa %o2, [%o0 + 0xb8] %asi
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stxa %o2, [%o0 + 0xc0] %asi
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stxa %o2, [%o0 + 0xc8] %asi
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stxa %o2, [%o0 + 0xd0] %asi
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stxa %o2, [%o0 + 0xd8] %asi
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stxa %o2, [%o0 + 0xe0] %asi
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stxa %o2, [%o0 + 0xe8] %asi
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stxa %o2, [%o0 + 0xf0] %asi
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stxa %o2, [%o0 + 0xf8] %asi
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subcc %g2, 256, %g2
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bne,pt %XCC, 45b
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add %o0, 256, %o0
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brz,pn %g1, 55f
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nop
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50:
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stxa %o2, [%o0 + 0x00] %asi
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stxa %o2, [%o0 + 0x08] %asi
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stxa %o2, [%o0 + 0x10] %asi
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stxa %o2, [%o0 + 0x18] %asi
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stxa %o2, [%o0 + 0x20] %asi
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stxa %o2, [%o0 + 0x28] %asi
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stxa %o2, [%o0 + 0x30] %asi
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stxa %o2, [%o0 + 0x38] %asi
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subcc %g1, 64, %g1
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bne,pt %XCC, 50b
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add %o0, 64, %o0
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55:
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wr %g0, ASI_P, %asi
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brz,pn %o1, 80f
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60:
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andncc %o1, 0x7, %g1
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be,pn %XCC, 2f
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sub %o1, %g1, %o1
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1: stxa %o2, [%o0 + 0x00] %asi
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subcc %g1, 8, %g1
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bne,pt %XCC, 1b
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add %o0, 8, %o0
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2: brz,pt %o1, 80f
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nop
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70:
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1: stba %o2, [%o0 + 0x00] %asi
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subcc %o1, 1, %o1
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bne,pt %XCC, 1b
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add %o0, 1, %o0
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/* fallthrough */
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80:
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wr %g0, ASI_PNF, %asi
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90:
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retl
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mov %o3, %o0
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END(__memset_niagara1)
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#endif
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