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105 lines
2.2 KiB
105 lines
2.2 KiB
/* NG4memset.S: Niagara-4 optimized memset/bzero.
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*
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* Copyright (C) 2012 David S. Miller (davem@davemloft.net)
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*/
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#include <asm/asi.h>
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.register %g2, #scratch
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.register %g3, #scratch
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.text
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.align 32
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.globl NG4memset
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NG4memset:
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andcc %o1, 0xff, %o4
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be,pt %icc, 1f
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mov %o2, %o1
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sllx %o4, 8, %g1
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or %g1, %o4, %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 %icc, 1f
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or %g1, %o2, %o4
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.size NG4memset,.-NG4memset
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.align 32
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.globl NG4bzero
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NG4bzero:
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clr %o4
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1: cmp %o1, 16
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ble %icc, .Ltiny
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mov %o0, %o3
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sub %g0, %o0, %g1
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and %g1, 0x7, %g1
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brz,pt %g1, .Laligned8
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sub %o1, %g1, %o1
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1: stb %o4, [%o0 + 0x00]
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subcc %g1, 1, %g1
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bne,pt %icc, 1b
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add %o0, 1, %o0
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.Laligned8:
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cmp %o1, 64 + (64 - 8)
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ble .Lmedium
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sub %g0, %o0, %g1
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andcc %g1, (64 - 1), %g1
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brz,pn %g1, .Laligned64
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sub %o1, %g1, %o1
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1: stx %o4, [%o0 + 0x00]
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subcc %g1, 8, %g1
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bne,pt %icc, 1b
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add %o0, 0x8, %o0
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.Laligned64:
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andn %o1, 64 - 1, %g1
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sub %o1, %g1, %o1
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brnz,pn %o4, .Lnon_bzero_loop
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mov 0x20, %g2
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1: stxa %o4, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
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subcc %g1, 0x40, %g1
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stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
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bne,pt %icc, 1b
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add %o0, 0x40, %o0
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.Lpostloop:
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cmp %o1, 8
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bl,pn %icc, .Ltiny
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membar #StoreStore|#StoreLoad
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.Lmedium:
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andn %o1, 0x7, %g1
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sub %o1, %g1, %o1
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1: stx %o4, [%o0 + 0x00]
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subcc %g1, 0x8, %g1
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bne,pt %icc, 1b
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add %o0, 0x08, %o0
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andcc %o1, 0x4, %g1
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be,pt %icc, .Ltiny
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sub %o1, %g1, %o1
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stw %o4, [%o0 + 0x00]
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add %o0, 0x4, %o0
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.Ltiny:
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cmp %o1, 0
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be,pn %icc, .Lexit
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1: subcc %o1, 1, %o1
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stb %o4, [%o0 + 0x00]
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bne,pt %icc, 1b
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add %o0, 1, %o0
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.Lexit:
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retl
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mov %o3, %o0
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.Lnon_bzero_loop:
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mov 0x08, %g3
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mov 0x28, %o5
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1: stxa %o4, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
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subcc %g1, 0x40, %g1
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stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
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stxa %o4, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
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stxa %o4, [%o0 + %o5] ASI_BLK_INIT_QUAD_LDD_P
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add %o0, 0x10, %o0
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stxa %o4, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
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stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
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stxa %o4, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
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stxa %o4, [%o0 + %o5] ASI_BLK_INIT_QUAD_LDD_P
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bne,pt %icc, 1b
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add %o0, 0x30, %o0
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ba,a,pt %icc, .Lpostloop
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.size NG4bzero,.-NG4bzero
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