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Fix bugs and improve performance of niagara memset/bzero.

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* sysdeps/sparc/sparc64/multiarch/memset-niagara1.S: Unroll main
	loop to 256 bytes instead of 64 bytes and fix test signedness.
This commit is contained in:
David S. Miller 2012-03-28 21:59:43 -07:00
parent 18c9d62b9c
commit 249d7567cc
2 changed files with 53 additions and 4 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2012-03-28 David S. Miller <davem@davemloft.net>
* sysdeps/sparc/sparc64/multiarch/memset-niagara1.S: Unroll main
loop to 256 bytes instead of 64 bytes and fix test signedness.
* sysdeps/sparc/Makefile: Add -fPIC to ASFLAGS-.os here....
* sysdeps/sparc/sparc32/Makefile: rather than here...
* sysdeps/sparc/sparc64/Makefile: and here.

54
sysdeps/sparc/sparc64/multiarch/memset-niagara1.S
View File

@ -1,5 +1,5 @@
/* Set a block of memory to some byte value. For SUN4V Niagara.
Copyright (C) 2006, 2008 Free Software Foundation, Inc.
Copyright (C) 2006, 2008, 2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David S. Miller (davem@davemloft.net)
@ -60,7 +60,7 @@ ENTRY(__bzero_niagara1)
wr %g0, ASI_P, %asi
cmp %o1, 15
bl,pn %icc, 70f
blu,pn %XCC, 70f
andcc %o0, 0x7, %g1
be,pt %XCC, 2f
mov 8, %g2
@ -71,7 +71,7 @@ ENTRY(__bzero_niagara1)
bne,pt %XCC, 1b
add %o0, 1, %o0
2: cmp %o1, 128
bl,pn %icc, 60f
blu,pn %XCC, 60f
andcc %o0, (64 - 1), %g1
be,pt %XCC, 40f
mov 64, %g2
@ -86,6 +86,51 @@ ENTRY(__bzero_niagara1)
wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
andn %o1, (64 - 1), %g1
sub %o1, %g1, %o1
andn %g1, (256 - 1), %g2
brz,pt %g2, 50f
and %g1, (256 - 1), %g1
45:
stxa %o2, [%o0 + 0x00] %asi
stxa %o2, [%o0 + 0x08] %asi
stxa %o2, [%o0 + 0x10] %asi
stxa %o2, [%o0 + 0x18] %asi
stxa %o2, [%o0 + 0x20] %asi
stxa %o2, [%o0 + 0x28] %asi
stxa %o2, [%o0 + 0x30] %asi
stxa %o2, [%o0 + 0x38] %asi
stxa %o2, [%o0 + 0x40] %asi
stxa %o2, [%o0 + 0x48] %asi
stxa %o2, [%o0 + 0x50] %asi
stxa %o2, [%o0 + 0x58] %asi
stxa %o2, [%o0 + 0x60] %asi
stxa %o2, [%o0 + 0x68] %asi
stxa %o2, [%o0 + 0x70] %asi
stxa %o2, [%o0 + 0x78] %asi
stxa %o2, [%o0 + 0x80] %asi
stxa %o2, [%o0 + 0x88] %asi
stxa %o2, [%o0 + 0x90] %asi
stxa %o2, [%o0 + 0x98] %asi
stxa %o2, [%o0 + 0xa0] %asi
stxa %o2, [%o0 + 0xa8] %asi
stxa %o2, [%o0 + 0xb0] %asi
stxa %o2, [%o0 + 0xb8] %asi
stxa %o2, [%o0 + 0xc0] %asi
stxa %o2, [%o0 + 0xc8] %asi
stxa %o2, [%o0 + 0xd0] %asi
stxa %o2, [%o0 + 0xd8] %asi
stxa %o2, [%o0 + 0xe0] %asi
stxa %o2, [%o0 + 0xe8] %asi
stxa %o2, [%o0 + 0xf0] %asi
stxa %o2, [%o0 + 0xf8] %asi
subcc %g2, 256, %g2
bne,pt %XCC, 45b
add %o0, 256, %o0
brz,pn %g1, 55f
nop
50:
stxa %o2, [%o0 + 0x00] %asi
stxa %o2, [%o0 + 0x08] %asi
@ -99,6 +144,7 @@ ENTRY(__bzero_niagara1)
bne,pt %XCC, 50b
add %o0, 64, %o0
55:
wr %g0, ASI_P, %asi
brz,pn %o1, 80f
60:
@ -115,7 +161,7 @@ ENTRY(__bzero_niagara1)
70:
1: stba %o2, [%o0 + 0x00] %asi
subcc %o1, 1, %o1
bne,pt %icc, 1b
bne,pt %XCC, 1b
add %o0, 1, %o0
/* fallthrough */