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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [sparc64/] [lib/] [VIScsum.S] - Rev 1781

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/* $Id: VIScsum.S,v 1.1.1.1 2004-04-15 01:33:53 phoenix Exp $
 * VIScsum.S: High bandwidth IP checksumming utilizing the UltraSparc
 *            Visual Instruction Set.
 *
 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 2000 David S. Miller (davem@redhat.com)
 *
 * Based on older sparc32/sparc64 checksum.S, which is:
 *
 *      Copyright(C) 1995 Linus Torvalds
 *      Copyright(C) 1995 Miguel de Icaza
 *      Copyright(C) 1996, 1997 David S. Miller
 *    derived from:
 *        Linux/Alpha checksum c-code
 *        Linux/ix86 inline checksum assembly
 *        RFC1071 Computing the Internet Checksum (esp. Jacobsons m68k code)
 *        David Mosberger-Tang for optimized reference c-code
 *        BSD4.4 portable checksum routine
 */

#ifdef __sparc_v9__
#define STACKOFF        2175
#else
#define STACKOFF        64
#endif

#ifdef __KERNEL__
#include <asm/head.h>
#include <asm/asi.h>
#include <asm/visasm.h>
#include <asm/asm_offsets.h>
#else
#define ASI_BLK_P       0xf0
#define FRPS_FEF        0x04
#endif

/* Dobrou noc, SunSoft engineers. Spete sladce.
 * This has a couple of tricks in and those
 * tricks are UltraLinux trade secrets :))
 */

#define START_THE_TRICK(fz,f0,f2,f4,f6,f8,f10)                                          \
        fcmpgt32        %fz, %f0, %g1           /*  FPM         Group   */;             \
        fcmpgt32        %fz, %f2, %g2           /*  FPM         Group   */;             \
        fcmpgt32        %fz, %f4, %g3           /*  FPM         Group   */;             \
        inc             %g1                     /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f6, %g5           /*  FPM                 */;             \
        srl             %g1, 1, %g1             /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f8, %g7           /*  FPM                 */;             \
        inc             %g2                     /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f10, %o3          /*  FPM                 */;             \
        srl             %g2, 1, %g2             /*  IEU0        Group   */;             \
        inc             %g3                     /*  IEU1                */;             \
        srl             %g3, 1, %g3             /*  IEU0        Group   */;             \
        add             %o2, %g1, %o2           /*  IEU1                */;             \
        add             %o2, %g2, %o2           /*  IEU0        Group   */;             \
        inc             %g5                     /*  IEU1                */;             \
        add             %o2, %g3, %o2           /*  IEU0        Group   */;

#define DO_THE_TRICK(O12,O14,f0,f2,f4,f6,f8,f10,f12,f14,F0,F2,F4,F6,F8,F10,F12,F14)     \
        srl             %g5, 1, %g5             /*  IEU0        Group   */;             \
        fpadd32         %F0, %f0, %F0           /*  FPA                 */;             \
        fcmpgt32        %O12, %f12, %o4         /*  FPM                 */;             \
        inc             %g7                     /*  IEU0        Group   */;             \
        fpadd32         %F2, %f2, %F2           /*  FPA                 */;             \
        fcmpgt32        %O14, %f14, %o5         /*  FPM                 */;             \
        add             %o2, %g5, %o2           /*  IEU1        Group   */;             \
        fpadd32         %F4, %f4, %F4           /*  FPA                 */;             \
        fcmpgt32        %f0, %F0, %g1           /*  FPM                 */;             \
        srl             %g7, 1, %g7             /*  IEU0        Group   */;             \
        fpadd32         %F6, %f6, %F6           /*  FPA                 */;             \
        fcmpgt32        %f2, %F2, %g2           /*  FPM                 */;             \
        add             %o2, %g7, %o2           /*  IEU0        Group   */;             \
        fpadd32         %F8, %f8, %F8           /*  FPA                 */;             \
        fcmpgt32        %f4, %F4, %g3           /*  FPM                 */;             \
        inc             %o3                     /*  IEU0        Group   */;             \
        fpadd32         %F10, %f10, %F10        /*  FPA                 */;             \
        fcmpgt32        %f6, %F6, %g5           /*  FPM                 */;             \
        srl             %o3, 1, %o3             /*  IEU0        Group   */;             \
        fpadd32         %F12, %f12, %F12        /*  FPA                 */;             \
        fcmpgt32        %f8, %F8, %g7           /*  FPM                 */;             \
        add             %o2, %o3, %o2           /*  IEU0        Group   */;             \
        fpadd32         %F14, %f14, %F14        /*  FPA                 */;             \
        fcmpgt32        %f10, %F10, %o3         /*  FPM                 */;             \
        inc             %o4                     /*  IEU0        Group   */;             \
        inc             %o5                     /*  IEU1                */;             \
        srl             %o4, 1, %o4             /*  IEU0        Group   */;             \
        inc             %g1                     /*  IEU1                */;             \
        srl             %o5, 1, %o5             /*  IEU0        Group   */;             \
        add             %o2, %o4, %o2           /*  IEU1                */;             \
        srl             %g1, 1, %g1             /*  IEU0        Group   */;             \
        add             %o2, %o5, %o2           /*  IEU1                */;             \
        inc             %g2                     /*  IEU0        Group   */;             \
        add             %o2, %g1, %o2           /*  IEU1                */;             \
        srl             %g2, 1, %g2             /*  IEU0        Group   */;             \
        inc             %g3                     /*  IEU1                */;             \
        srl             %g3, 1, %g3             /*  IEU0        Group   */;             \
        add             %o2, %g2, %o2           /*  IEU1                */;             \
        inc             %g5                     /*  IEU0        Group   */;             \
        add             %o2, %g3, %o2           /*  IEU0                */;

#define END_THE_TRICK(O12,O14,f0,f2,f4,f6,f8,f10,f12,f14,S0,S1,S2,S3,T0,T1,U0,fz)       \
        srl             %g5, 1, %g5             /*  IEU0        Group   */;             \
        fpadd32         %f2, %f0, %S0           /*  FPA                 */;             \
        fcmpgt32        %O12, %f12, %o4         /*  FPM                 */;             \
        inc             %g7                     /*  IEU0        Group   */;             \
        fpadd32         %f6, %f4, %S1           /*  FPA                 */;             \
        fcmpgt32        %O14, %f14, %o5         /*  FPM                 */;             \
        srl             %g7, 1, %g7             /*  IEU0        Group   */;             \
        fpadd32         %f10, %f8, %S2          /*  FPA                 */;             \
        fcmpgt32        %f0, %S0, %g1           /*  FPM                 */;             \
        inc             %o3                     /*  IEU0        Group   */;             \
        fpadd32         %f14, %f12, %S3         /*  FPA                 */;             \
        fcmpgt32        %f4, %S1, %g2           /*  FPM                 */;             \
        add             %o2, %g5, %o2           /*  IEU0        Group   */;             \
        fpadd32         %S0, %S1, %T0           /*  FPA                 */;             \
        fcmpgt32        %f8, %S2, %g3           /*  FPM                 */;             \
        add             %o2, %g7, %o2           /*  IEU0        Group   */;             \
        fzero           %fz                     /*  FPA                 */;             \
        fcmpgt32        %f12, %S3, %g5          /*  FPM                 */;             \
        srl             %o3, 1, %o3             /*  IEU0        Group   */;             \
        fpadd32         %S2, %S3, %T1           /*  FPA                 */;             \
        fcmpgt32        %S0, %T0, %g7           /*  FPM                 */;             \
        add             %o2, %o3, %o2           /*  IEU0        Group   */;             \
        fpadd32         %T0, %T1, %U0           /*  FPA                 */;             \
        fcmpgt32        %S2, %T1, %o3           /*  FPM                 */;             \
        inc             %o4                     /*  IEU0        Group   */;             \
        inc             %o5                     /*  IEU1                */;             \
        srl             %o4, 1, %o4             /*  IEU0        Group   */;             \
        inc             %g1                     /*  IEU1                */;             \
        add             %o2, %o4, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f2, %o4           /*  FPM                 */;             \
        srl             %o5, 1, %o5             /*  IEU0        Group   */;             \
        inc             %g2                     /*  IEU1                */;             \
        add             %o2, %o5, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f6, %o5           /*  FPM                 */;             \
        srl             %g1, 1, %g1             /*  IEU0        Group   */;             \
        inc             %g3                     /*  IEU1                */;             \
        add             %o2, %g1, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f10, %g1          /*  FPM                 */;             \
        srl             %g2, 1, %g2             /*  IEU0        Group   */;             \
        inc             %g5                     /*  IEU1                */;             \
        add             %o2, %g2, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %f14, %g2          /*  FPM                 */;             \
        srl             %g3, 1, %g3             /*  IEU0        Group   */;             \
        inc             %g7                     /*  IEU1                */;             \
        add             %o2, %g3, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %S1, %g3           /*  FPM                 */;             \
        srl             %g5, 1, %g5             /*  IEU0        Group   */;             \
        inc             %o3                     /*  IEU1                */;             \
        add             %o2, %g5, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %S3, %g5           /*  FPM                 */;             \
        srl             %g7, 1, %g7             /*  IEU0        Group   */;             \
        inc             %o4                     /*  IEU1                */;             \
        add             %o2, %g7, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %T1, %g7           /*  FPM                 */;             \
        srl             %o3, 1, %o3             /*  IEU0        Group   */;             \
        inc             %o5                     /*  IEU1                */;             \
        add             %o2, %o3, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %T0, %U0, %o3           /*  FPM                 */;             \
        srl             %o4, 1, %o4             /*  IEU0        Group   */;             \
        inc             %g1                     /*  IEU1                */;             \
        sub             %o2, %o4, %o2           /*  IEU0        Group   */;             \
        fcmpgt32        %fz, %U0, %o4           /*  FPM                 */;             \
        srl             %o5, 1, %o5             /*  IEU0        Group   */;             \
        inc             %g2                     /*  IEU1                */;             \
        srl             %g1, 1, %g1             /*  IEU0        Group   */;             \
        sub             %o2, %o5, %o2           /*  IEU1                */;             \
        std             %U0, [%sp + STACKOFF]   /*  Store               */;             \
        srl             %g2, 1, %g2             /*  IEU0        Group   */;             \
        sub             %o2, %g1, %o2           /*  IEU1                */;             \
        inc             %g3                     /*  IEU0        Group   */;             \
        sub             %o2, %g2, %o2           /*  IEU1                */;             \
        srl             %g3, 1, %g3             /*  IEU0        Group   */;             \
        inc             %g5                     /*  IEU1                */;             \
        srl             %g5, 1, %g5             /*  IEU0        Group   */;             \
        sub             %o2, %g3, %o2           /*  IEU1                */;             \
        ldx             [%sp + STACKOFF], %o5   /*  Load        Group   */;             \
        inc             %g7                     /*  IEU0                */;             \
        sub             %o2, %g5, %o2           /*  IEU1                */;             \
        srl             %g7, 1, %g7             /*  IEU0        Group   */;             \
        inc             %o3                     /*  IEU1                */;             \
        srl             %o3, 1, %o3             /*  IEU0        Group   */;             \
        sub             %o2, %g7, %o2           /*  IEU1                */;             \
        inc             %o4                     /*  IEU0        Group   */;             \
        add             %o2, %o3, %o2           /*  IEU1                */;             \
        srl             %o4, 1, %o4             /*  IEU0        Group   */;             \
        sub             %o2, %o4, %o2           /*  IEU0        Group   */;             \
        addcc           %o2, %o5, %o2           /*  IEU1        Group   */;             \
        bcs,a,pn        %xcc, 33f               /*  CTI                 */;             \
         add            %o2, 1, %o2             /*  IEU0                */;             \
33:                                             /*  That's it           */;

#define CSUM_LASTCHUNK(offset)                                                          \
        ldx             [%o0 - offset - 0x10], %g2;                                     \
        ldx             [%o0 - offset - 0x08], %g3;                                     \
        addcc           %g2, %o2, %o2;                                                  \
        bcs,a,pn        %xcc, 31f;                                                      \
         add            %o2, 1, %o2;                                                    \
31:     addcc           %g3, %o2, %o2;                                                  \
        bcs,a,pn        %xcc, 32f;                                                      \
         add            %o2, 1, %o2;                                                    \
32:

        .text
        .globl          csum_partial
        .align          32
csum_partial:
        andcc           %o0, 7, %g0             /*  IEU1        Group           */
        be,pt           %icc, 4f                /*  CTI                         */
         andcc          %o0, 0x38, %g3          /*  IEU1                        */
        mov             1, %g5                  /*  IEU0        Group           */
        cmp             %o1, 6                  /*  IEU1                        */
        bl,pn           %icc, 21f               /*  CTI                         */
         andcc          %o0, 1, %g0             /*  IEU1        Group           */
        bne,pn          %icc, csump_really_slow /*  CTI                         */
         andcc          %o0, 2, %g0             /*  IEU1        Group           */
        be,pt           %icc, 1f                /*  CTI                         */
         and            %o0, 4, %g7             /*  IEU0                        */
        lduh            [%o0], %g2              /*  Load                        */
        sub             %o1, 2, %o1             /*  IEU0        Group           */
        add             %o0, 2, %o0             /*  IEU1                        */
        andcc           %o0, 4, %g7             /*  IEU1        Group           */
        sll             %g5, 16, %g5            /*  IEU0                        */
        sll             %g2, 16, %g2            /*  IEU0        Group           */
        addcc           %g2, %o2, %o2           /*  IEU1        Group (regdep)  */
        bcs,a,pn        %icc, 1f                /*  CTI                         */
         add            %o2, %g5, %o2           /*  IEU0                        */
1:      ld              [%o0], %g2              /*  Load                        */
        brz,a,pn        %g7, 4f                 /*  CTI+IEU1    Group           */
         and            %o0, 0x38, %g3          /*  IEU0                        */
        add             %o0, 4, %o0             /*  IEU0        Group           */
        sub             %o1, 4, %o1             /*  IEU1                        */
        addcc           %g2, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %icc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      and             %o0, 0x38, %g3          /*  IEU1        Group           */
4:      srl             %o2, 0, %o2             /*  IEU0        Group           */
        mov             0x40, %g1               /*  IEU1                        */
        brz,pn          %g3, 3f                 /*  CTI+IEU1    Group           */
         sub            %g1, %g3, %g1           /*  IEU0                        */
        cmp             %o1, 56                 /*  IEU1        Group           */
        blu,pn          %icc, 20f               /*  CTI                         */
         andcc          %o0, 8, %g0             /*  IEU1        Group           */
        be,pn           %icc, 1f                /*  CTI                         */
         ldx            [%o0], %g2              /*  Load                        */
        add             %o0, 8, %o0             /*  IEU0        Group           */
        sub             %o1, 8, %o1             /*  IEU1                        */
        addcc           %g2, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      andcc           %g1, 0x10, %g0          /*  IEU1        Group           */
        be,pn           %icc, 2f                /*  CTI                         */
         and            %g1, 0x20, %g1          /*  IEU0                        */
        ldx             [%o0], %g2              /*  Load                        */
        ldx             [%o0+8], %g3            /*  Load        Group           */
        add             %o0, 16, %o0            /*  IEU0                        */
        sub             %o1, 16, %o1            /*  IEU1                        */
        addcc           %g2, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      addcc           %g3, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 2f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
2:      brz,pn          %g1, 3f                 /*  CTI+IEU1    Group           */
         ldx            [%o0], %g2              /*  Load                        */
        ldx             [%o0+8], %g3            /*  Load        Group           */
        ldx             [%o0+16], %g5           /*  Load        Group           */
        ldx             [%o0+24], %g7           /*  Load        Group           */
        add             %o0, 32, %o0            /*  IEU0                        */
        sub             %o1, 32, %o1            /*  IEU1                        */
        addcc           %g2, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      addcc           %g3, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      addcc           %g5, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      addcc           %g7, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 3f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
3:      cmp             %o1, 0xc0               /*  IEU1        Group           */
        blu,pn          %icc, 20f               /*  CTI                         */
         sllx           %o2, 32, %g5            /*  IEU0                        */
#ifdef __KERNEL__
        VISEntry
#endif
        addcc           %o2, %g5, %o2           /*  IEU1        Group           */
        sub             %o1, 0xc0, %o1          /*  IEU0                        */
        wr              %g0, ASI_BLK_P, %asi    /*  LSU         Group           */
        membar          #StoreLoad              /*  LSU         Group           */
        srlx            %o2, 32, %o2            /*  IEU0        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU1                        */
1:      andcc           %o1, 0x80, %g0          /*  IEU1        Group           */
        bne,pn          %icc, 7f                /*  CTI                         */
         andcc          %o1, 0x40, %g0          /*  IEU1        Group           */
        be,pn           %icc, 6f                /*  CTI                         */
         fzero          %f12                    /*  FPA                         */
        fzero           %f14                    /*  FPA         Group           */
        ldda            [%o0 + 0x000] %asi, %f16
        ldda            [%o0 + 0x040] %asi, %f32
        ldda            [%o0 + 0x080] %asi, %f48
        START_THE_TRICK(f12,f16,f18,f20,f22,f24,f26)
        ba,a,pt         %xcc, 3f
6:      sub             %o0, 0x40, %o0          /*  IEU0        Group           */
        fzero           %f28                    /*  FPA                         */
        fzero           %f30                    /*  FPA         Group           */
        ldda            [%o0 + 0x040] %asi, %f32
        ldda            [%o0 + 0x080] %asi, %f48
        ldda            [%o0 + 0x0c0] %asi, %f0
        START_THE_TRICK(f28,f32,f34,f36,f38,f40,f42)
        ba,a,pt         %xcc, 4f
7:      bne,pt          %icc, 8f                /*  CTI                         */
         fzero          %f44                    /*  FPA                         */
        add             %o0, 0x40, %o0          /*  IEU0        Group           */
        fzero           %f60                    /*  FPA                         */
        fzero           %f62                    /*  FPA         Group           */
        ldda            [%o0 - 0x040] %asi, %f0
        ldda            [%o0 + 0x000] %asi, %f16
        ldda            [%o0 + 0x040] %asi, %f32
        START_THE_TRICK(f60,f0,f2,f4,f6,f8,f10)
        ba,a,pt         %xcc, 2f
8:      add             %o0, 0x80, %o0          /*  IEU0        Group           */
        fzero           %f46                    /*  FPA                         */
        ldda            [%o0 - 0x080] %asi, %f48
        ldda            [%o0 - 0x040] %asi, %f0
        ldda            [%o0 + 0x000] %asi, %f16
        START_THE_TRICK(f44,f48,f50,f52,f54,f56,f58)
1:      DO_THE_TRICK(f44,f46,f48,f50,f52,f54,f56,f58,f60,f62,f0,f2,f4,f6,f8,f10,f12,f14)
        ldda            [%o0 + 0x040] %asi, %f32
2:      DO_THE_TRICK(f60,f62,f0,f2,f4,f6,f8,f10,f12,f14,f16,f18,f20,f22,f24,f26,f28,f30)
        ldda            [%o0 + 0x080] %asi, %f48
3:      DO_THE_TRICK(f12,f14,f16,f18,f20,f22,f24,f26,f28,f30,f32,f34,f36,f38,f40,f42,f44,f46)
        ldda            [%o0 + 0x0c0] %asi, %f0
4:      DO_THE_TRICK(f28,f30,f32,f34,f36,f38,f40,f42,f44,f46,f48,f50,f52,f54,f56,f58,f60,f62)
        add             %o0, 0x100, %o0         /*  IEU0        Group           */
        subcc           %o1, 0x100, %o1         /*  IEU1                        */
        bgeu,a,pt       %icc, 1b                /*  CTI                         */
         ldda           [%o0 + 0x000] %asi, %f16
        membar          #Sync                   /*  LSU         Group           */
        DO_THE_TRICK(f44,f46,f48,f50,f52,f54,f56,f58,f60,f62,f0,f2,f4,f6,f8,f10,f12,f14)
        END_THE_TRICK(f60,f62,f0,f2,f4,f6,f8,f10,f12,f14,f16,f18,f20,f22,f24,f26,f28,f30)
#ifdef __KERNEL__
        ldub            [%g6 + AOFF_task_thread + AOFF_thread_current_ds], %g7
#endif
        and             %o1, 0x3f, %o1          /*  IEU0        Group           */
#ifdef __KERNEL__
        VISExit
        wr              %g7, %g0, %asi
#endif
20:     andcc           %o1, 0xf0, %g1          /*  IEU1        Group           */
        be,pn           %icc, 23f               /*  CTI                         */
         and            %o1, 0xf, %o3           /*  IEU0                        */
#ifdef __KERNEL__
22:     sll             %g1, 1, %o4             /*  IEU0        Group           */
        sethi           %hi(23f), %g7           /*  IEU1                        */
        sub             %g7, %o4, %g7           /*  IEU0        Group           */
        jmpl            %g7 + %lo(23f), %g0     /*  CTI         Group brk forced*/
         add            %o0, %g1, %o0           /*  IEU0                        */
#else
22:     rd              %pc, %g7                /*  LSU         Group+4bubbles  */
        sll             %g1, 1, %o4             /*  IEU0        Group           */
        sub             %g7, %o4, %g7           /*  IEU0        Group (regdep)  */
        jmpl            %g7 + (23f - 22b), %g0  /*  CTI         Group brk forced*/
         add            %o0, %g1, %o0           /*  IEU0                        */
#endif
        CSUM_LASTCHUNK(0xe0)
        CSUM_LASTCHUNK(0xd0)
        CSUM_LASTCHUNK(0xc0)
        CSUM_LASTCHUNK(0xb0)
        CSUM_LASTCHUNK(0xa0)
        CSUM_LASTCHUNK(0x90)
        CSUM_LASTCHUNK(0x80)
        CSUM_LASTCHUNK(0x70)
        CSUM_LASTCHUNK(0x60)
        CSUM_LASTCHUNK(0x50)
        CSUM_LASTCHUNK(0x40)
        CSUM_LASTCHUNK(0x30)
        CSUM_LASTCHUNK(0x20)
        CSUM_LASTCHUNK(0x10)
        CSUM_LASTCHUNK(0x00)
23:     brnz,pn         %o3, 26f                /*  CTI+IEU1    Group           */
24:      sllx           %o2, 32, %g1            /*  IEU0                        */
25:     addcc           %o2, %g1, %o0           /*  IEU1        Group           */
        srlx            %o0, 32, %o0            /*  IEU0        Group (regdep)  */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o0, 1, %o0             /*  IEU1                        */
1:      retl                                    /*  CTI         Group brk forced*/
         srl            %o0, 0, %o0             /*  IEU0                        */
26:     andcc           %o1, 8, %g0             /*  IEU1        Group           */
        be,pn           %icc, 1f                /*  CTI                         */
         ldx            [%o0], %g3              /*  Load                        */
        add             %o0, 8, %o0             /*  IEU0        Group           */
        addcc           %g3, %o2, %o2           /*  IEU1        Group           */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      andcc           %o1, 4, %g0             /*  IEU1        Group           */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %g2                     /*  IEU0                        */
        ld              [%o0], %g2              /*  Load                        */
        add             %o0, 4, %o0             /*  IEU0        Group           */
        sllx            %g2, 32, %g2            /*  IEU0        Group           */
1:      andcc           %o1, 2, %g0             /*  IEU1                        */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %o4                     /*  IEU0        Group           */
        lduh            [%o0], %o4              /*  Load                        */
        add             %o0, 2, %o0             /*  IEU1                        */
        sll             %o4, 16, %o4            /*  IEU0        Group           */
1:      andcc           %o1, 1, %g0             /*  IEU1                        */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %o5                     /*  IEU0        Group           */
        ldub            [%o0], %o5              /*  Load                        */
        sll             %o5, 8, %o5             /*  IEU0        Group           */
1:      or              %g2, %o4, %o4           /*  IEU1                        */
        or              %o5, %o4, %o4           /*  IEU0        Group (regdep)  */
        addcc           %o4, %o2, %o2           /*  IEU1        Group (regdep)  */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      ba,pt           %xcc, 25b               /*  CTI         Group           */
         sllx           %o2, 32, %g1            /*  IEU0                        */
21:     srl             %o2, 0, %o2             /*  IEU0        Group           */
        cmp             %o1, 0                  /*  IEU1                        */
        be,pn           %icc, 24b               /*  CTI                         */
         andcc          %o1, 4, %g0             /*  IEU1        Group           */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %g2                     /*  IEU0                        */
        lduh            [%o0], %g3              /*  Load                        */
        lduh            [%o0+2], %g2            /*  Load        Group           */
        add             %o0, 4, %o0             /*  IEU0        Group           */
        sllx            %g3, 48, %g3            /*  IEU0        Group           */
        sllx            %g2, 32, %g2            /*  IEU0        Group           */
        or              %g3, %g2, %g2           /*  IEU0        Group           */
1:      andcc           %o1, 2, %g0             /*  IEU1                        */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %o4                     /*  IEU0        Group           */
        lduh            [%o0], %o4              /*  Load                        */
        add             %o0, 2, %o0             /*  IEU1                        */
        sll             %o4, 16, %o4            /*  IEU0        Group           */
1:      andcc           %o1, 1, %g0             /*  IEU1                        */
        be,a,pn         %icc, 1f                /*  CTI                         */
         clr            %o5                     /*  IEU0        Group           */
        ldub            [%o0], %o5              /*  Load                        */
        sll             %o5, 8, %o5             /*  IEU0        Group           */
1:      or              %g2, %o4, %o4           /*  IEU1                        */
        or              %o5, %o4, %o4           /*  IEU0        Group (regdep)  */
        addcc           %o4, %o2, %o2           /*  IEU1        Group (regdep)  */
        bcs,a,pn        %xcc, 1f                /*  CTI                         */
         add            %o2, 1, %o2             /*  IEU0                        */
1:      ba,pt           %xcc, 25b               /*  CTI         Group           */
         sllx           %o2, 32, %g1            /*  IEU0                        */

        /* When buff is byte aligned and len is large, we backoff to
         * this really slow handling.  The issue is that we cannot do
         * the VIS stuff when buff is byte aligned as unaligned.c will
         * not fix it up.
         */
csump_really_slow:
        mov     %o0, %o3
        mov     %o1, %o4
        cmp     %o1, 0
        ble,pn  %icc, 9f
         mov    0, %o0
        andcc   %o3, 1, %o5
        be,pt   %icc, 1f
         sra    %o4, 1, %g3
        add     %o1, -1, %o4
        ldub    [%o3], %o0
        add     %o3, 1, %o3
        sra     %o4, 1, %g3
1:
        cmp     %g3, 0
        be,pt   %icc, 3f
         and    %o4, 1, %g2
        and     %o3, 2, %g2
        brz,a,pt %g2, 1f
         sra    %g3, 1, %g3
        add     %g3, -1, %g3
        add     %o4, -2, %o4
        lduh    [%o3], %g2
        add     %o3, 2, %o3
        add     %o0, %g2, %o0
        sra     %g3, 1, %g3
1:
        cmp     %g3, 0
        be,pt   %icc, 2f
         and    %o4, 2, %g2
1:
        ld      [%o3], %g2
        addcc   %o0, %g2, %o0
        addx    %o0, %g0, %o0
        addcc   %g3, -1, %g3
        bne,pt  %icc, 1b
         add    %o3, 4, %o3
        srl     %o0, 16, %o1
        sethi   %hi(64512), %g2
        or      %g2, 1023, %g2
        and     %o0, %g2, %g3
        add     %g3, %o1, %g3
        srl     %g3, 16, %o0
        and     %g3, %g2, %g2
        add     %g2, %o0, %g3
        sll     %g3, 16, %g3
        srl     %g3, 16, %o0
        and     %o4, 2, %g2
2:
        cmp     %g2, 0
        be,pt   %icc, 3f
         and    %o4, 1, %g2
        lduh    [%o3], %g2
        add     %o3, 2, %o3
        add     %o0, %g2, %o0
        and     %o4, 1, %g2
3:
        cmp     %g2, 0
        be,pt   %icc, 1f
         srl    %o0, 16, %o1
        ldub    [%o3], %g2
        sll     %g2, 8, %g2
        add     %o0, %g2, %o0
        srl     %o0, 16, %o1
1:
        sethi   %hi(64512), %g2
        or      %g2, 1023, %g2
        cmp     %o5, 0
        and     %o0, %g2, %g3
        add     %g3, %o1, %g3
        srl     %g3, 16, %o0
        and     %g3, %g2, %g2
        add     %g2, %o0, %g3
        sll     %g3, 16, %g3
        srl     %g3, 16, %o0
        srl     %g3, 24, %g3
        and     %o0, 255, %g2
        sll     %g2, 8, %g2
        bne,pt  %icc, 1f
         or     %g3, %g2, %g2
9:
        mov     %o0, %g2
1:
        addcc   %g2, %o2, %g2
        addx    %g2, %g0, %g2
        retl
         srl    %g2, 0, %o0

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