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| author | David S. Miller <davem@davemloft.net> | 2012-03-28 21:59:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-03-28 21:59:43 -0700 |
| commit | 249d7567cc0179882ee84d4e3c627850eed716dd (patch) | |
| tree | 53dd4c0a10a9bed1888dc9fd66ad815d9b5b770d /sysdeps/sparc/sparc64 | |
| parent | 18c9d62b9c575a54f26ca5aebeb03dd7322fc180 (diff) | |
| download | glibc-249d7567cc0179882ee84d4e3c627850eed716dd.tar glibc-249d7567cc0179882ee84d4e3c627850eed716dd.tar.gz glibc-249d7567cc0179882ee84d4e3c627850eed716dd.tar.bz2 glibc-249d7567cc0179882ee84d4e3c627850eed716dd.zip | |
Fix bugs and improve performance of niagara memset/bzero.
* sysdeps/sparc/sparc64/multiarch/memset-niagara1.S: Unroll main
loop to 256 bytes instead of 64 bytes and fix test signedness.
Diffstat (limited to 'sysdeps/sparc/sparc64')
| -rw-r--r-- | sysdeps/sparc/sparc64/multiarch/memset-niagara1.S | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S b/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S index 5247bb3f94..1d1b3cc5f1 100644 --- a/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S +++ b/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S @@ -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 */ |