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