| /* Copy SIZE bytes from SRC to DEST. For SUN4V Niagara-4. |
| Copyright (C) 2012-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David S. Miller (davem@davemloft.net) |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| |
| #define ASI_BLK_INIT_QUAD_LDD_P 0xe2 |
| |
| #define FPRS_FEF 0x04 |
| |
| /* On T4 it is very expensive to access ASRs like %fprs and |
| * %asi, avoiding a read or a write can save ~50 cycles. |
| */ |
| #define FPU_ENTER \ |
| rd %fprs, %o5; \ |
| andcc %o5, FPRS_FEF, %g0; \ |
| be,a,pn %icc, 999f; \ |
| wr %g0, FPRS_FEF, %fprs; \ |
| 999: |
| |
| #define VISEntryHalf FPU_ENTER |
| #define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs |
| |
| #define GLOBAL_SPARE %g5 |
| |
| #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P |
| #define EX_LD(x) x |
| #define EX_ST(x) x |
| #define EX_RETVAL(x) x |
| #define LOAD(type,addr,dest) type [addr], dest |
| #define STORE(type,src,addr) type src, [addr] |
| #define STORE_INIT(src,addr) stxa src, [addr] STORE_ASI |
| |
| #if !defined NOT_IN_libc |
| |
| .register %g2,#scratch |
| .register %g3,#scratch |
| .register %g6,#scratch |
| |
| .text |
| |
| ENTRY(__mempcpy_niagara4) |
| ba,pt %icc, 101f |
| add %o0, %o2, %o3 |
| END(__mempcpy_niagara4) |
| |
| .align 32 |
| ENTRY(__memcpy_niagara4) |
| 100: /* %o0=dst, %o1=src, %o2=len */ |
| mov %o0, %o3 |
| 101: |
| #ifndef __arch64__ |
| srl %o2, 0, %o2 |
| #endif |
| brz,pn %o2, .Lexit |
| cmp %o2, 3 |
| ble,pn %icc, .Ltiny |
| cmp %o2, 19 |
| ble,pn %icc, .Lsmall |
| or %o0, %o1, %g2 |
| cmp %o2, 128 |
| bl,pn %icc, .Lmedium |
| nop |
| |
| .Llarge:/* len >= 0x80 */ |
| /* First get dest 8 byte aligned. */ |
| sub %g0, %o0, %g1 |
| and %g1, 0x7, %g1 |
| brz,pt %g1, 51f |
| sub %o2, %g1, %o2 |
| |
| 1: EX_LD(LOAD(ldub, %o1 + 0x00, %g2)) |
| add %o1, 1, %o1 |
| subcc %g1, 1, %g1 |
| add %o0, 1, %o0 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stb, %g2, %o0 - 0x01)) |
| |
| 51: LOAD(prefetch, %o1 + 0x040, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x080, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x0c0, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x100, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x140, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x180, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x1c0, #n_reads_strong) |
| LOAD(prefetch, %o1 + 0x200, #n_reads_strong) |
| |
| /* Check if we can use the straight fully aligned |
| * loop, or we require the alignaddr/faligndata variant. |
| */ |
| andcc %o1, 0x7, %o5 |
| bne,pn %icc, .Llarge_src_unaligned |
| sub %g0, %o0, %g1 |
| |
| /* Legitimize the use of initializing stores by getting dest |
| * to be 64-byte aligned. |
| */ |
| and %g1, 0x3f, %g1 |
| brz,pt %g1, .Llarge_aligned |
| sub %o2, %g1, %o2 |
| |
| 1: EX_LD(LOAD(ldx, %o1 + 0x00, %g2)) |
| add %o1, 8, %o1 |
| subcc %g1, 8, %g1 |
| add %o0, 8, %o0 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stx, %g2, %o0 - 0x08)) |
| |
| .Llarge_aligned: |
| /* len >= 0x80 && src 8-byte aligned && dest 8-byte aligned */ |
| andn %o2, 0x3f, %o4 |
| sub %o2, %o4, %o2 |
| |
| 1: EX_LD(LOAD(ldx, %o1 + 0x00, %g1)) |
| add %o1, 0x40, %o1 |
| EX_LD(LOAD(ldx, %o1 - 0x38, %g2)) |
| subcc %o4, 0x40, %o4 |
| EX_LD(LOAD(ldx, %o1 - 0x30, %g3)) |
| EX_LD(LOAD(ldx, %o1 - 0x28, GLOBAL_SPARE)) |
| EX_LD(LOAD(ldx, %o1 - 0x20, %o5)) |
| EX_ST(STORE_INIT(%g1, %o0)) |
| add %o0, 0x08, %o0 |
| EX_ST(STORE_INIT(%g2, %o0)) |
| add %o0, 0x08, %o0 |
| EX_LD(LOAD(ldx, %o1 - 0x18, %g2)) |
| EX_ST(STORE_INIT(%g3, %o0)) |
| add %o0, 0x08, %o0 |
| EX_LD(LOAD(ldx, %o1 - 0x10, %g3)) |
| EX_ST(STORE_INIT(GLOBAL_SPARE, %o0)) |
| add %o0, 0x08, %o0 |
| EX_LD(LOAD(ldx, %o1 - 0x08, GLOBAL_SPARE)) |
| EX_ST(STORE_INIT(%o5, %o0)) |
| add %o0, 0x08, %o0 |
| EX_ST(STORE_INIT(%g2, %o0)) |
| add %o0, 0x08, %o0 |
| EX_ST(STORE_INIT(%g3, %o0)) |
| add %o0, 0x08, %o0 |
| EX_ST(STORE_INIT(GLOBAL_SPARE, %o0)) |
| add %o0, 0x08, %o0 |
| bne,pt %icc, 1b |
| LOAD(prefetch, %o1 + 0x200, #n_reads_strong) |
| |
| membar #StoreLoad | #StoreStore |
| |
| brz,pn %o2, .Lexit |
| cmp %o2, 19 |
| ble,pn %icc, .Lsmall_unaligned |
| nop |
| ba,a,pt %icc, .Lmedium_noprefetch |
| |
| .Lexit: retl |
| mov EX_RETVAL(%o3), %o0 |
| |
| .Llarge_src_unaligned: |
| andn %o2, 0x3f, %o4 |
| sub %o2, %o4, %o2 |
| VISEntryHalf |
| alignaddr %o1, %g0, %g1 |
| add %o1, %o4, %o1 |
| EX_LD(LOAD(ldd, %g1 + 0x00, %f0)) |
| 1: EX_LD(LOAD(ldd, %g1 + 0x08, %f2)) |
| subcc %o4, 0x40, %o4 |
| EX_LD(LOAD(ldd, %g1 + 0x10, %f4)) |
| EX_LD(LOAD(ldd, %g1 + 0x18, %f6)) |
| EX_LD(LOAD(ldd, %g1 + 0x20, %f8)) |
| EX_LD(LOAD(ldd, %g1 + 0x28, %f10)) |
| EX_LD(LOAD(ldd, %g1 + 0x30, %f12)) |
| EX_LD(LOAD(ldd, %g1 + 0x38, %f14)) |
| faligndata %f0, %f2, %f16 |
| EX_LD(LOAD(ldd, %g1 + 0x40, %f0)) |
| faligndata %f2, %f4, %f18 |
| add %g1, 0x40, %g1 |
| faligndata %f4, %f6, %f20 |
| faligndata %f6, %f8, %f22 |
| faligndata %f8, %f10, %f24 |
| faligndata %f10, %f12, %f26 |
| faligndata %f12, %f14, %f28 |
| faligndata %f14, %f0, %f30 |
| EX_ST(STORE(std, %f16, %o0 + 0x00)) |
| EX_ST(STORE(std, %f18, %o0 + 0x08)) |
| EX_ST(STORE(std, %f20, %o0 + 0x10)) |
| EX_ST(STORE(std, %f22, %o0 + 0x18)) |
| EX_ST(STORE(std, %f24, %o0 + 0x20)) |
| EX_ST(STORE(std, %f26, %o0 + 0x28)) |
| EX_ST(STORE(std, %f28, %o0 + 0x30)) |
| EX_ST(STORE(std, %f30, %o0 + 0x38)) |
| add %o0, 0x40, %o0 |
| bne,pt %icc, 1b |
| LOAD(prefetch, %g1 + 0x200, #n_reads_strong) |
| VISExitHalf |
| |
| brz,pn %o2, .Lexit |
| cmp %o2, 19 |
| ble,pn %icc, .Lsmall_unaligned |
| nop |
| ba,a,pt %icc, .Lmedium_unaligned |
| |
| .Lmedium: |
| LOAD(prefetch, %o1 + 0x40, #n_reads_strong) |
| andcc %g2, 0x7, %g0 |
| bne,pn %icc, .Lmedium_unaligned |
| nop |
| .Lmedium_noprefetch: |
| andncc %o2, 0x20 - 1, %o5 |
| be,pn %icc, 2f |
| sub %o2, %o5, %o2 |
| 1: EX_LD(LOAD(ldx, %o1 + 0x00, %g1)) |
| EX_LD(LOAD(ldx, %o1 + 0x08, %g2)) |
| EX_LD(LOAD(ldx, %o1 + 0x10, GLOBAL_SPARE)) |
| EX_LD(LOAD(ldx, %o1 + 0x18, %o4)) |
| add %o1, 0x20, %o1 |
| subcc %o5, 0x20, %o5 |
| EX_ST(STORE(stx, %g1, %o0 + 0x00)) |
| EX_ST(STORE(stx, %g2, %o0 + 0x08)) |
| EX_ST(STORE(stx, GLOBAL_SPARE, %o0 + 0x10)) |
| EX_ST(STORE(stx, %o4, %o0 + 0x18)) |
| bne,pt %icc, 1b |
| add %o0, 0x20, %o0 |
| 2: andcc %o2, 0x18, %o5 |
| be,pt %icc, 3f |
| sub %o2, %o5, %o2 |
| 1: EX_LD(LOAD(ldx, %o1 + 0x00, %g1)) |
| add %o1, 0x08, %o1 |
| add %o0, 0x08, %o0 |
| subcc %o5, 0x08, %o5 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stx, %g1, %o0 - 0x08)) |
| 3: brz,pt %o2, .Lexit |
| cmp %o2, 0x04 |
| bl,pn %icc, .Ltiny |
| nop |
| EX_LD(LOAD(lduw, %o1 + 0x00, %g1)) |
| add %o1, 0x04, %o1 |
| add %o0, 0x04, %o0 |
| subcc %o2, 0x04, %o2 |
| bne,pn %icc, .Ltiny |
| EX_ST(STORE(stw, %g1, %o0 - 0x04)) |
| ba,a,pt %icc, .Lexit |
| .Lmedium_unaligned: |
| /* First get dest 8 byte aligned. */ |
| sub %g0, %o0, %g1 |
| and %g1, 0x7, %g1 |
| brz,pt %g1, 2f |
| sub %o2, %g1, %o2 |
| |
| 1: EX_LD(LOAD(ldub, %o1 + 0x00, %g2)) |
| add %o1, 1, %o1 |
| subcc %g1, 1, %g1 |
| add %o0, 1, %o0 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stb, %g2, %o0 - 0x01)) |
| 2: |
| and %o1, 0x7, %g1 |
| brz,pn %g1, .Lmedium_noprefetch |
| sll %g1, 3, %g1 |
| mov 64, %g2 |
| sub %g2, %g1, %g2 |
| andn %o1, 0x7, %o1 |
| EX_LD(LOAD(ldx, %o1 + 0x00, %o4)) |
| sllx %o4, %g1, %o4 |
| andn %o2, 0x08 - 1, %o5 |
| sub %o2, %o5, %o2 |
| 1: EX_LD(LOAD(ldx, %o1 + 0x08, %g3)) |
| add %o1, 0x08, %o1 |
| subcc %o5, 0x08, %o5 |
| srlx %g3, %g2, GLOBAL_SPARE |
| or GLOBAL_SPARE, %o4, GLOBAL_SPARE |
| EX_ST(STORE(stx, GLOBAL_SPARE, %o0 + 0x00)) |
| add %o0, 0x08, %o0 |
| bne,pt %icc, 1b |
| sllx %g3, %g1, %o4 |
| srl %g1, 3, %g1 |
| add %o1, %g1, %o1 |
| brz,pn %o2, .Lexit |
| nop |
| ba,pt %icc, .Lsmall_unaligned |
| |
| .Ltiny: |
| EX_LD(LOAD(ldub, %o1 + 0x00, %g1)) |
| subcc %o2, 1, %o2 |
| be,pn %icc, .Lexit |
| EX_ST(STORE(stb, %g1, %o0 + 0x00)) |
| EX_LD(LOAD(ldub, %o1 + 0x01, %g1)) |
| subcc %o2, 1, %o2 |
| be,pn %icc, .Lexit |
| EX_ST(STORE(stb, %g1, %o0 + 0x01)) |
| EX_LD(LOAD(ldub, %o1 + 0x02, %g1)) |
| ba,pt %icc, .Lexit |
| EX_ST(STORE(stb, %g1, %o0 + 0x02)) |
| |
| .Lsmall: |
| andcc %g2, 0x3, %g0 |
| bne,pn %icc, .Lsmall_unaligned |
| andn %o2, 0x4 - 1, %o5 |
| sub %o2, %o5, %o2 |
| 1: |
| EX_LD(LOAD(lduw, %o1 + 0x00, %g1)) |
| add %o1, 0x04, %o1 |
| subcc %o5, 0x04, %o5 |
| add %o0, 0x04, %o0 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stw, %g1, %o0 - 0x04)) |
| brz,pt %o2, .Lexit |
| nop |
| ba,a,pt %icc, .Ltiny |
| |
| .Lsmall_unaligned: |
| 1: EX_LD(LOAD(ldub, %o1 + 0x00, %g1)) |
| add %o1, 1, %o1 |
| add %o0, 1, %o0 |
| subcc %o2, 1, %o2 |
| bne,pt %icc, 1b |
| EX_ST(STORE(stb, %g1, %o0 - 0x01)) |
| ba,a,pt %icc, .Lexit |
| END(__memcpy_niagara4) |
| |
| #endif |