+++ /dev/null
-/* NG2memcpy.S: Niagara-2 optimized memcpy.
- *
- * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
- */
-
-#ifdef __KERNEL__
-#include <asm/visasm.h>
-#include <asm/asi.h>
-#define GLOBAL_SPARE %g7
-#else
-#define ASI_PNF 0x82
-#define ASI_BLK_P 0xf0
-#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
-#define FPRS_FEF 0x04
-#ifdef MEMCPY_DEBUG
-#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \
- clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0;
-#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
-#else
-#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
-#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
-#endif
-#define GLOBAL_SPARE %g5
-#endif
-
-#ifndef STORE_ASI
-#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
-#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P
-#else
-#define STORE_ASI 0x80 /* ASI_P */
-#endif
-#endif
-
-#ifndef EX_LD
-#define EX_LD(x) x
-#endif
-
-#ifndef EX_ST
-#define EX_ST(x) x
-#endif
-
-#ifndef EX_RETVAL
-#define EX_RETVAL(x) x
-#endif
-
-#ifndef LOAD
-#define LOAD(type,addr,dest) type [addr], dest
-#endif
-
-#ifndef LOAD_BLK
-#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_P, dest
-#endif
-
-#ifndef STORE
-#ifndef MEMCPY_DEBUG
-#define STORE(type,src,addr) type src, [addr]
-#else
-#define STORE(type,src,addr) type##a src, [addr] 0x80
-#endif
-#endif
-
-#ifndef STORE_BLK
-#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P
-#endif
-
-#ifndef STORE_INIT
-#define STORE_INIT(src,addr) stxa src, [addr] STORE_ASI
-#endif
-
-#ifndef FUNC_NAME
-#define FUNC_NAME NG2memcpy
-#endif
-
-#ifndef PREAMBLE
-#define PREAMBLE
-#endif
-
-#ifndef XCC
-#define XCC xcc
-#endif
-
-#define FREG_FROB(x0, x1, x2, x3, x4, x5, x6, x7, x8) \
- faligndata %x0, %x1, %f0; \
- faligndata %x1, %x2, %f2; \
- faligndata %x2, %x3, %f4; \
- faligndata %x3, %x4, %f6; \
- faligndata %x4, %x5, %f8; \
- faligndata %x5, %x6, %f10; \
- faligndata %x6, %x7, %f12; \
- faligndata %x7, %x8, %f14;
-
-#define FREG_MOVE_1(x0) \
- fmovd %x0, %f0;
-#define FREG_MOVE_2(x0, x1) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2;
-#define FREG_MOVE_3(x0, x1, x2) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4;
-#define FREG_MOVE_4(x0, x1, x2, x3) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4; \
- fmovd %x3, %f6;
-#define FREG_MOVE_5(x0, x1, x2, x3, x4) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4; \
- fmovd %x3, %f6; \
- fmovd %x4, %f8;
-#define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4; \
- fmovd %x3, %f6; \
- fmovd %x4, %f8; \
- fmovd %x5, %f10;
-#define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4; \
- fmovd %x3, %f6; \
- fmovd %x4, %f8; \
- fmovd %x5, %f10; \
- fmovd %x6, %f12;
-#define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6, x7) \
- fmovd %x0, %f0; \
- fmovd %x1, %f2; \
- fmovd %x2, %f4; \
- fmovd %x3, %f6; \
- fmovd %x4, %f8; \
- fmovd %x5, %f10; \
- fmovd %x6, %f12; \
- fmovd %x7, %f14;
-#define FREG_LOAD_1(base, x0) \
- EX_LD(LOAD(ldd, base + 0x00, %x0))
-#define FREG_LOAD_2(base, x0, x1) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1));
-#define FREG_LOAD_3(base, x0, x1, x2) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1)); \
- EX_LD(LOAD(ldd, base + 0x10, %x2));
-#define FREG_LOAD_4(base, x0, x1, x2, x3) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1)); \
- EX_LD(LOAD(ldd, base + 0x10, %x2)); \
- EX_LD(LOAD(ldd, base + 0x18, %x3));
-#define FREG_LOAD_5(base, x0, x1, x2, x3, x4) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1)); \
- EX_LD(LOAD(ldd, base + 0x10, %x2)); \
- EX_LD(LOAD(ldd, base + 0x18, %x3)); \
- EX_LD(LOAD(ldd, base + 0x20, %x4));
-#define FREG_LOAD_6(base, x0, x1, x2, x3, x4, x5) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1)); \
- EX_LD(LOAD(ldd, base + 0x10, %x2)); \
- EX_LD(LOAD(ldd, base + 0x18, %x3)); \
- EX_LD(LOAD(ldd, base + 0x20, %x4)); \
- EX_LD(LOAD(ldd, base + 0x28, %x5));
-#define FREG_LOAD_7(base, x0, x1, x2, x3, x4, x5, x6) \
- EX_LD(LOAD(ldd, base + 0x00, %x0)); \
- EX_LD(LOAD(ldd, base + 0x08, %x1)); \
- EX_LD(LOAD(ldd, base + 0x10, %x2)); \
- EX_LD(LOAD(ldd, base + 0x18, %x3)); \
- EX_LD(LOAD(ldd, base + 0x20, %x4)); \
- EX_LD(LOAD(ldd, base + 0x28, %x5)); \
- EX_LD(LOAD(ldd, base + 0x30, %x6));
-
- .register %g2,#scratch
- .register %g3,#scratch
-
- .text
- .align 64
-
- .globl FUNC_NAME
- .type FUNC_NAME,#function
-FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
- srlx %o2, 31, %g2
- cmp %g2, 0
- tne %xcc, 5
- PREAMBLE
- mov %o0, GLOBAL_SPARE
- cmp %o2, 0
- be,pn %XCC, 85f
- or %o0, %o1, %o3
- cmp %o2, 16
- blu,a,pn %XCC, 80f
- or %o3, %o2, %o3
-
- /* 2 blocks (128 bytes) is the minimum we can do the block
- * copy with. We need to ensure that we'll iterate at least
- * once in the block copy loop. At worst we'll need to align
- * the destination to a 64-byte boundary which can chew up
- * to (64 - 1) bytes from the length before we perform the
- * block copy loop.
- *
- * However, the cut-off point, performance wise, is around
- * 4 64-byte blocks.
- */
- cmp %o2, (4 * 64)
- blu,pt %XCC, 75f
- andcc %o3, 0x7, %g0
-
- /* %o0: dst
- * %o1: src
- * %o2: len (known to be >= 128)
- *
- * The block copy loops can use %o4, %g2, %g3 as
- * temporaries while copying the data. %o5 must
- * be preserved between VISEntryHalf and VISExitHalf
- */
-
- LOAD(prefetch, %o1 + 0x000, #one_read)
- LOAD(prefetch, %o1 + 0x040, #one_read)
- LOAD(prefetch, %o1 + 0x080, #one_read)
-
- /* Align destination on 64-byte boundary. */
- andcc %o0, (64 - 1), %o4
- be,pt %XCC, 2f
- sub %o4, 64, %o4
- sub %g0, %o4, %o4 ! bytes to align dst
- sub %o2, %o4, %o2
-1: subcc %o4, 1, %o4
- EX_LD(LOAD(ldub, %o1, %g1))
- EX_ST(STORE(stb, %g1, %o0))
- add %o1, 1, %o1
- bne,pt %XCC, 1b
- add %o0, 1, %o0
-
-2:
- /* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve
- * o5 from here until we hit VISExitHalf.
- */
- VISEntryHalf
-
- alignaddr %o1, %g0, %g0
-
- add %o1, (64 - 1), %o4
- andn %o4, (64 - 1), %o4
- andn %o2, (64 - 1), %g1
- sub %o2, %g1, %o2
-
- and %o1, (64 - 1), %g2
- add %o1, %g1, %o1
- sub %o0, %o4, %g3
- brz,pt %g2, 190f
- cmp %g2, 32
- blu,a 5f
- cmp %g2, 16
- cmp %g2, 48
- blu,a 4f
- cmp %g2, 40
- cmp %g2, 56
- blu 170f
- nop
- ba,a,pt %xcc, 180f
-
-4: /* 32 <= low bits < 48 */
- blu 150f
- nop
- ba,a,pt %xcc, 160f
-5: /* 0 < low bits < 32 */
- blu,a 6f
- cmp %g2, 8
- cmp %g2, 24
- blu 130f
- nop
- ba,a,pt %xcc, 140f
-6: /* 0 < low bits < 16 */
- bgeu 120f
- nop
- /* fall through for 0 < low bits < 8 */
-110: sub %o4, 64, %g2
- EX_LD(LOAD_BLK(%g2, %f0))
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f14, f16)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_8(f16, f18, f20, f22, f24, f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-120: sub %o4, 56, %g2
- FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f10, f12)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f16, f18)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_7(f18, f20, f22, f24, f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-130: sub %o4, 48, %g2
- FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f10)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f6, f8, f10, f16, f18, f20)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_6(f20, f22, f24, f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-140: sub %o4, 40, %g2
- FREG_LOAD_5(%g2, f0, f2, f4, f6, f8)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f6, f8, f16, f18, f20, f22)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_5(f22, f24, f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-150: sub %o4, 32, %g2
- FREG_LOAD_4(%g2, f0, f2, f4, f6)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f6, f16, f18, f20, f22, f24)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_4(f24, f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-160: sub %o4, 24, %g2
- FREG_LOAD_3(%g2, f0, f2, f4)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f4, f16, f18, f20, f22, f24, f26)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_3(f26, f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-170: sub %o4, 16, %g2
- FREG_LOAD_2(%g2, f0, f2)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f2, f16, f18, f20, f22, f24, f26, f28)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_2(f28, f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-180: sub %o4, 8, %g2
- FREG_LOAD_1(%g2, f0)
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- EX_LD(LOAD_BLK(%o4, %f16))
- FREG_FROB(f0, f16, f18, f20, f22, f24, f26, f28, f30)
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- FREG_MOVE_1(f30)
- subcc %g1, 64, %g1
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
- ba,pt %xcc, 195f
- nop
-
-190:
-1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
- subcc %g1, 64, %g1
- EX_LD(LOAD_BLK(%o4, %f0))
- EX_ST(STORE_BLK(%f0, %o4 + %g3))
- add %o4, 64, %o4
- bne,pt %xcc, 1b
- LOAD(prefetch, %o4 + 64, #one_read)
-
-195:
- add %o4, %g3, %o0
- membar #Sync
-
- VISExitHalf
-
- /* %o2 contains any final bytes still needed to be copied
- * over. If anything is left, we copy it one byte at a time.
- */
- brz,pt %o2, 85f
- sub %o0, %o1, %o3
- ba,a,pt %XCC, 90f
-
- .align 64
-75: /* 16 < len <= 64 */
- bne,pn %XCC, 75f
- sub %o0, %o1, %o3
-
-72:
- andn %o2, 0xf, %o4
- and %o2, 0xf, %o2
-1: subcc %o4, 0x10, %o4
- EX_LD(LOAD(ldx, %o1, %o5))
- add %o1, 0x08, %o1
- EX_LD(LOAD(ldx, %o1, %g1))
- sub %o1, 0x08, %o1
- EX_ST(STORE(stx, %o5, %o1 + %o3))
- add %o1, 0x8, %o1
- EX_ST(STORE(stx, %g1, %o1 + %o3))
- bgu,pt %XCC, 1b
- add %o1, 0x8, %o1
-73: andcc %o2, 0x8, %g0
- be,pt %XCC, 1f
- nop
- sub %o2, 0x8, %o2
- EX_LD(LOAD(ldx, %o1, %o5))
- EX_ST(STORE(stx, %o5, %o1 + %o3))
- add %o1, 0x8, %o1
-1: andcc %o2, 0x4, %g0
- be,pt %XCC, 1f
- nop
- sub %o2, 0x4, %o2
- EX_LD(LOAD(lduw, %o1, %o5))
- EX_ST(STORE(stw, %o5, %o1 + %o3))
- add %o1, 0x4, %o1
-1: cmp %o2, 0
- be,pt %XCC, 85f
- nop
- ba,pt %xcc, 90f
- nop
-
-75:
- andcc %o0, 0x7, %g1
- sub %g1, 0x8, %g1
- be,pn %icc, 2f
- sub %g0, %g1, %g1
- sub %o2, %g1, %o2
-
-1: subcc %g1, 1, %g1
- EX_LD(LOAD(ldub, %o1, %o5))
- EX_ST(STORE(stb, %o5, %o1 + %o3))
- bgu,pt %icc, 1b
- add %o1, 1, %o1
-
-2: add %o1, %o3, %o0
- andcc %o1, 0x7, %g1
- bne,pt %icc, 8f
- sll %g1, 3, %g1
-
- cmp %o2, 16
- bgeu,pt %icc, 72b
- nop
- ba,a,pt %xcc, 73b
-
-8: mov 64, %o3
- andn %o1, 0x7, %o1
- EX_LD(LOAD(ldx, %o1, %g2))
- sub %o3, %g1, %o3
- andn %o2, 0x7, %o4
- sllx %g2, %g1, %g2
-1: add %o1, 0x8, %o1
- EX_LD(LOAD(ldx, %o1, %g3))
- subcc %o4, 0x8, %o4
- srlx %g3, %o3, %o5
- or %o5, %g2, %o5
- EX_ST(STORE(stx, %o5, %o0))
- add %o0, 0x8, %o0
- bgu,pt %icc, 1b
- sllx %g3, %g1, %g2
-
- srl %g1, 3, %g1
- andcc %o2, 0x7, %o2
- be,pn %icc, 85f
- add %o1, %g1, %o1
- ba,pt %xcc, 90f
- sub %o0, %o1, %o3
-
- .align 64
-80: /* 0 < len <= 16 */
- andcc %o3, 0x3, %g0
- bne,pn %XCC, 90f
- sub %o0, %o1, %o3
-
-1:
- subcc %o2, 4, %o2
- EX_LD(LOAD(lduw, %o1, %g1))
- EX_ST(STORE(stw, %g1, %o1 + %o3))
- bgu,pt %XCC, 1b
- add %o1, 4, %o1
-
-85: retl
- mov EX_RETVAL(GLOBAL_SPARE), %o0
-
- .align 32
-90:
- subcc %o2, 1, %o2
- EX_LD(LOAD(ldub, %o1, %g1))
- EX_ST(STORE(stb, %g1, %o1 + %o3))
- bgu,pt %XCC, 90b
- add %o1, 1, %o1
- retl
- mov EX_RETVAL(GLOBAL_SPARE), %o0
-
- .size FUNC_NAME, .-FUNC_NAME
git.samba.org / sfrench / cifs-2.6.git / blobdiff