X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc64%2Flib%2FU3copy_to_user.S;h=715227156dac0c36d96962d5912b86aa39211393;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=6b421fc2f12ea7e006f1ed449f84212bb59134f7;hpb=db216c3d5e4c040e557a50f8f5d35d5c415e8c1c;p=linux-2.6.git diff --git a/arch/sparc64/lib/U3copy_to_user.S b/arch/sparc64/lib/U3copy_to_user.S index 6b421fc2f..715227156 100644 --- a/arch/sparc64/lib/U3copy_to_user.S +++ b/arch/sparc64/lib/U3copy_to_user.S @@ -1,15 +1,15 @@ -/* $Id: U3copy_to_user.S,v 1.3 2000/11/01 09:29:19 davem Exp $ - * U3memcpy.S: UltraSparc-III optimized copy to userspace. +/* U3copy_to_user.S: UltraSparc-III optimized memcpy. * - * Copyright (C) 1999, 2000 David S. Miller (davem@redhat.com) + * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) */ -#ifdef __KERNEL__ #include #include #include #include -#undef SMALL_COPY_USES_FPU + +#define XCC xcc + #define EXNV(x,y,a,b) \ 98: x,y; \ .section .fixup; \ @@ -34,6 +34,18 @@ .text; \ .align 4; #define EXNV3(x,y,a,b) \ +98: x,y; \ + .section .fixup; \ + .align 4; \ +99: a, b, %o0; \ + retl; \ + add %o0, 4, %o0; \ + .section __ex_table; \ + .align 4; \ + .word 98b, 99b; \ + .text; \ + .align 4; +#define EXNV4(x,y,a,b) \ 98: x,y; \ .section .fixup; \ .align 4; \ @@ -112,22 +124,9 @@ .word 98b, 99b; \ .text; \ .align 4; -#else -#define ASI_AIUS 0x80 -#define ASI_BLK_AIUS 0xf0 -#define FPRS_FEF 0x04 -#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs -#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs -#define SMALL_COPY_USES_FPU -#define EXNV(x,y,a,b) x,y; -#define EXNV2(x,y,a,b) x,y; -#define EXNV3(x,y,a,b) x,y; -#define EX(x,y,a,b) x,y; -#define EXBLK1(x,y) x,y; -#define EXBLK2(x,y) x,y; -#define EXBLK3(x,y) x,y; -#define EXBLK4(x,y) x,y; -#endif + + .register %g2,#scratch + .register %g3,#scratch /* Special/non-trivial issues of this code: * @@ -148,400 +147,269 @@ * of up to 2.4GB per second. */ - .globl U3copy_to_user -U3copy_to_user: /* %o0=dst, %o1=src, %o2=len */ + .globl U3copy_to_user +U3copy_to_user: /* %o0=dst, %o1=src, %o2=len */ /* Writing to %asi is _expensive_ so we hardcode it. * Reading %asi to check for KERNEL_DS is comparatively * cheap. */ - rd %asi, %g1 ! MS Group (4 cycles) - cmp %g1, ASI_AIUS ! A0 Group - bne U3memcpy ! BR - nop ! A1 -#ifndef __KERNEL__ - /* Save away original 'dst' for memcpy return value. */ - mov %o0, %g3 ! A0 Group -#endif - /* Anything to copy at all? */ - cmp %o2, 0 ! A1 - ble,pn %icc, U3copy_to_user_short_ret ! BR - - /* Extremely small copy? */ - cmp %o2, 31 ! A0 Group - ble,pn %icc, U3copy_to_user_short ! BR - - /* Large enough to use unrolled prefetch loops? */ - cmp %o2, 0x100 ! A1 - bge,a,pt %icc, U3copy_to_user_enter ! BR Group - andcc %o0, 0x3f, %g2 ! A0 - - ba,pt %xcc, U3copy_to_user_toosmall ! BR Group - andcc %o0, 0x7, %g2 ! A0 - - .align 32 -U3copy_to_user_short: - /* Copy %o2 bytes from src to dst, one byte at a time. */ - ldub [%o1 + 0x00], %o3 ! MS Group - add %o1, 0x1, %o1 ! A0 - add %o0, 0x1, %o0 ! A1 - subcc %o2, 1, %o2 ! A0 Group - - bg,pt %icc, U3copy_to_user_short ! BR - EXNV(stba %o3, [%o0 + -1] %asi, add %o2, 1) ! MS Group (1-cycle stall) - -U3copy_to_user_short_ret: -#ifdef __KERNEL__ - retl ! BR Group (0-4 cycle stall) - clr %o0 ! A0 -#else - retl ! BR Group (0-4 cycle stall) - mov %g3, %o0 ! A0 -#endif - - /* Here len >= (6 * 64) and condition codes reflect execution + rd %asi, %g1 + cmp %g1, ASI_AIUS + bne,pn %icc, U3memcpy_user_stub + nop + + cmp %o2, 0 + be,pn %XCC, 85f + or %o0, %o1, %o3 + cmp %o2, 16 + bleu,a,pn %XCC, 80f + or %o3, %o2, %o3 + + cmp %o2, 256 + blu,pt %XCC, 70f + andcc %o3, 0x7, %g0 + + ba,pt %xcc, 1f + andcc %o0, 0x3f, %g2 + + /* Here len >= 256 and condition codes reflect execution * of "andcc %o0, 0x7, %g2", done by caller. */ .align 64 -U3copy_to_user_enter: +1: /* Is 'dst' already aligned on an 64-byte boundary? */ - be,pt %xcc, 2f ! BR + be,pt %XCC, 2f /* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number * of bytes to copy to make 'dst' 64-byte aligned. We pre- * subtract this from 'len'. */ - sub %g2, 0x40, %g2 ! A0 Group - sub %g0, %g2, %g2 ! A0 Group - sub %o2, %g2, %o2 ! A0 Group + sub %g2, 0x40, %g2 + sub %g0, %g2, %g2 + sub %o2, %g2, %o2 /* Copy %g2 bytes from src to dst, one byte at a time. */ -1: ldub [%o1 + 0x00], %o3 ! MS (Group) - add %o1, 0x1, %o1 ! A1 - add %o0, 0x1, %o0 ! A0 Group - subcc %g2, 0x1, %g2 ! A1 +1: ldub [%o1 + 0x00], %o3 + add %o1, 0x1, %o1 + add %o0, 0x1, %o0 + subcc %g2, 0x1, %g2 - bg,pt %icc, 1b ! BR Group - EXNV2(stba %o3, [%o0 + -1] %asi, add %o2, %g2) ! MS Group + bg,pt %XCC, 1b + EXNV2(stba %o3, [%o0 + -1] %asi, add %o2, %g2) -2: VISEntryHalf ! MS+MS - and %o1, 0x7, %g1 ! A1 - ba,pt %xcc, U3copy_to_user_begin ! BR - alignaddr %o1, %g0, %o1 ! MS (Break-after) +2: VISEntryHalf + and %o1, 0x7, %g1 + ba,pt %xcc, 1f + alignaddr %o1, %g0, %o1 .align 64 -U3copy_to_user_begin: -#ifdef __KERNEL__ - .globl U3copy_to_user_nop_1_6 -U3copy_to_user_nop_1_6: - ldxa [%g0] ASI_DCU_CONTROL_REG, %g3 - sethi %uhi(DCU_PE), %o3 - sllx %o3, 32, %o3 - or %g3, %o3, %o3 - stxa %o3, [%g0] ASI_DCU_CONTROL_REG ! Enable P-cache - membar #Sync -#endif - prefetch [%o1 + 0x000], #one_read ! MS Group1 - prefetch [%o1 + 0x040], #one_read ! MS Group2 - andn %o2, (0x40 - 1), %o4 ! A0 - prefetch [%o1 + 0x080], #one_read ! MS Group3 - cmp %o4, 0x140 ! A0 - prefetch [%o1 + 0x0c0], #one_read ! MS Group4 - ldd [%o1 + 0x000], %f0 ! MS Group5 (%f0 results at G8) - bge,a,pt %icc, 1f ! BR - - prefetch [%o1 + 0x100], #one_read ! MS Group6 -1: ldd [%o1 + 0x008], %f2 ! AX (%f2 results at G9) - cmp %o4, 0x180 ! A1 - bge,a,pt %icc, 1f ! BR - prefetch [%o1 + 0x140], #one_read ! MS Group7 -1: ldd [%o1 + 0x010], %f4 ! AX (%f4 results at G10) - cmp %o4, 0x1c0 ! A1 - bge,a,pt %icc, 1f ! BR - - prefetch [%o1 + 0x180], #one_read ! MS Group8 -1: faligndata %f0, %f2, %f16 ! FGA Group9 (%f16 at G12) - ldd [%o1 + 0x018], %f6 ! AX (%f6 results at G12) - faligndata %f2, %f4, %f18 ! FGA Group10 (%f18 results at G13) - ldd [%o1 + 0x020], %f8 ! MS (%f8 results at G13) - faligndata %f4, %f6, %f20 ! FGA Group12 (1-cycle stall,%f20 at G15) - ldd [%o1 + 0x028], %f10 ! MS (%f10 results at G15) - faligndata %f6, %f8, %f22 ! FGA Group13 (%f22 results at G16) - - ldd [%o1 + 0x030], %f12 ! MS (%f12 results at G16) - faligndata %f8, %f10, %f24 ! FGA Group15 (1-cycle stall,%f24 at G18) - ldd [%o1 + 0x038], %f14 ! MS (%f14 results at G18) - faligndata %f10, %f12, %f26 ! FGA Group16 (%f26 results at G19) - ldd [%o1 + 0x040], %f0 ! MS (%f0 results at G19) - - /* We only use the first loop if len > (7 * 64). */ - subcc %o4, 0x1c0, %o4 ! A0 Group17 - bg,pt %icc, U3copy_to_user_loop1 ! BR - add %o1, 0x40, %o1 ! A1 - - add %o4, 0x140, %o4 ! A0 Group18 - ba,pt %xcc, U3copy_to_user_loop2 ! BR - srl %o4, 6, %o3 ! A0 Group19 - nop - nop - nop - nop - nop - - nop - nop - - /* This loop performs the copy and queues new prefetches. - * We drop into the second loop when len <= (5 * 64). Note - * that this (5 * 64) factor has been subtracted from len - * already. - */ -U3copy_to_user_loop1: - ldd [%o1 + 0x008], %f2 ! MS Group2 (%f2 results at G5) - faligndata %f12, %f14, %f28 ! FGA (%f28 results at G5) - ldd [%o1 + 0x010], %f4 ! MS Group3 (%f4 results at G6) - faligndata %f14, %f0, %f30 ! FGA Group4 (1-cycle stall, %f30 at G7) - EXBLK1(stda %f16, [%o0] ASI_BLK_AIUS) ! MS - ldd [%o1 + 0x018], %f6 ! AX (%f6 results at G7) - - faligndata %f0, %f2, %f16 ! FGA Group12 (7-cycle stall) - ldd [%o1 + 0x020], %f8 ! MS (%f8 results at G15) - faligndata %f2, %f4, %f18 ! FGA Group13 (%f18 results at G16) - ldd [%o1 + 0x028], %f10 ! MS (%f10 results at G16) - faligndata %f4, %f6, %f20 ! FGA Group14 (%f20 results at G17) - ldd [%o1 + 0x030], %f12 ! MS (%f12 results at G17) - faligndata %f6, %f8, %f22 ! FGA Group15 (%f22 results at G18) - ldd [%o1 + 0x038], %f14 ! MS (%f14 results at G18) - - faligndata %f8, %f10, %f24 ! FGA Group16 (%f24 results at G19) - ldd [%o1 + 0x040], %f0 ! AX (%f0 results at G19) - prefetch [%o1 + 0x180], #one_read ! MS - faligndata %f10, %f12, %f26 ! FGA Group17 (%f26 results at G20) - subcc %o4, 0x40, %o4 ! A0 - add %o1, 0x40, %o1 ! A1 - bg,pt %xcc, U3copy_to_user_loop1 ! BR - add %o0, 0x40, %o0 ! A0 Group18 - -U3copy_to_user_loop2_enter: - mov 5, %o3 ! A1 - - /* This loop performs on the copy, no new prefetches are - * queued. We do things this way so that we do not perform - * any spurious prefetches past the end of the src buffer. - */ -U3copy_to_user_loop2: - ldd [%o1 + 0x008], %f2 ! MS - faligndata %f12, %f14, %f28 ! FGA Group2 - ldd [%o1 + 0x010], %f4 ! MS - faligndata %f14, %f0, %f30 ! FGA Group4 (1-cycle stall) - EXBLK2(stda %f16, [%o0] ASI_BLK_AIUS) ! MS - ldd [%o1 + 0x018], %f6 ! AX - faligndata %f0, %f2, %f16 ! FGA Group12 (7-cycle stall) - - ldd [%o1 + 0x020], %f8 ! MS - faligndata %f2, %f4, %f18 ! FGA Group13 - ldd [%o1 + 0x028], %f10 ! MS - faligndata %f4, %f6, %f20 ! FGA Group14 - ldd [%o1 + 0x030], %f12 ! MS - faligndata %f6, %f8, %f22 ! FGA Group15 - ldd [%o1 + 0x038], %f14 ! MS - faligndata %f8, %f10, %f24 ! FGA Group16 - - ldd [%o1 + 0x040], %f0 ! AX - faligndata %f10, %f12, %f26 ! FGA Group17 - subcc %o3, 0x01, %o3 ! A0 - add %o1, 0x40, %o1 ! A1 - bg,pt %xcc, U3copy_to_user_loop2 ! BR - add %o0, 0x40, %o0 ! A0 Group18 +1: + membar #StoreLoad | #StoreStore | #LoadStore + prefetch [%o1 + 0x000], #one_read + prefetch [%o1 + 0x040], #one_read + andn %o2, (0x40 - 1), %o4 + prefetch [%o1 + 0x080], #one_read + prefetch [%o1 + 0x0c0], #one_read + ldd [%o1 + 0x000], %f0 + prefetch [%o1 + 0x100], #one_read + ldd [%o1 + 0x008], %f2 + prefetch [%o1 + 0x140], #one_read + ldd [%o1 + 0x010], %f4 + prefetch [%o1 + 0x180], #one_read + faligndata %f0, %f2, %f16 + ldd [%o1 + 0x018], %f6 + faligndata %f2, %f4, %f18 + ldd [%o1 + 0x020], %f8 + faligndata %f4, %f6, %f20 + ldd [%o1 + 0x028], %f10 + faligndata %f6, %f8, %f22 + + ldd [%o1 + 0x030], %f12 + faligndata %f8, %f10, %f24 + ldd [%o1 + 0x038], %f14 + faligndata %f10, %f12, %f26 + ldd [%o1 + 0x040], %f0 + + sub %o4, 0x80, %o4 + add %o1, 0x40, %o1 + ba,pt %xcc, 1f + srl %o4, 6, %o3 + + .align 64 +1: + ldd [%o1 + 0x008], %f2 + faligndata %f12, %f14, %f28 + ldd [%o1 + 0x010], %f4 + faligndata %f14, %f0, %f30 + EXBLK2(stda %f16, [%o0] ASI_BLK_AIUS) + ldd [%o1 + 0x018], %f6 + faligndata %f0, %f2, %f16 + + ldd [%o1 + 0x020], %f8 + faligndata %f2, %f4, %f18 + ldd [%o1 + 0x028], %f10 + faligndata %f4, %f6, %f20 + ldd [%o1 + 0x030], %f12 + faligndata %f6, %f8, %f22 + ldd [%o1 + 0x038], %f14 + faligndata %f8, %f10, %f24 + + ldd [%o1 + 0x040], %f0 + prefetch [%o1 + 0x180], #one_read + faligndata %f10, %f12, %f26 + subcc %o3, 0x01, %o3 + add %o1, 0x40, %o1 + bg,pt %XCC, 1b + add %o0, 0x40, %o0 /* Finally we copy the last full 64-byte block. */ -U3copy_to_user_loopfini: - ldd [%o1 + 0x008], %f2 ! MS - faligndata %f12, %f14, %f28 ! FGA - ldd [%o1 + 0x010], %f4 ! MS Group19 - faligndata %f14, %f0, %f30 ! FGA - EXBLK3(stda %f16, [%o0] ASI_BLK_AIUS) ! MS Group20 - ldd [%o1 + 0x018], %f6 ! AX - faligndata %f0, %f2, %f16 ! FGA Group11 (7-cycle stall) - ldd [%o1 + 0x020], %f8 ! MS - faligndata %f2, %f4, %f18 ! FGA Group12 - ldd [%o1 + 0x028], %f10 ! MS - faligndata %f4, %f6, %f20 ! FGA Group13 - ldd [%o1 + 0x030], %f12 ! MS - faligndata %f6, %f8, %f22 ! FGA Group14 - ldd [%o1 + 0x038], %f14 ! MS - faligndata %f8, %f10, %f24 ! FGA Group15 - cmp %g1, 0 ! A0 - be,pt %icc, 1f ! BR - add %o0, 0x40, %o0 ! A1 - ldd [%o1 + 0x040], %f0 ! MS -1: faligndata %f10, %f12, %f26 ! FGA Group16 - faligndata %f12, %f14, %f28 ! FGA Group17 - faligndata %f14, %f0, %f30 ! FGA Group18 - EXBLK4(stda %f16, [%o0] ASI_BLK_AIUS) ! MS - add %o0, 0x40, %o0 ! A0 - add %o1, 0x40, %o1 ! A1 -#ifdef __KERNEL__ - .globl U3copy_to_user_nop_2_3 -U3copy_to_user_nop_2_3: - mov PRIMARY_CONTEXT, %o3 - stxa %g0, [%o3] ASI_DMMU ! Flush P-cache - stxa %g3, [%g0] ASI_DCU_CONTROL_REG ! Disable P-cache -#endif - membar #Sync ! MS Group26 (7-cycle stall) + ldd [%o1 + 0x008], %f2 + faligndata %f12, %f14, %f28 + ldd [%o1 + 0x010], %f4 + faligndata %f14, %f0, %f30 + EXBLK3(stda %f16, [%o0] ASI_BLK_AIUS) + ldd [%o1 + 0x018], %f6 + faligndata %f0, %f2, %f16 + ldd [%o1 + 0x020], %f8 + faligndata %f2, %f4, %f18 + ldd [%o1 + 0x028], %f10 + faligndata %f4, %f6, %f20 + ldd [%o1 + 0x030], %f12 + faligndata %f6, %f8, %f22 + ldd [%o1 + 0x038], %f14 + faligndata %f8, %f10, %f24 + cmp %g1, 0 + be,pt %XCC, 1f + add %o0, 0x40, %o0 + ldd [%o1 + 0x040], %f0 +1: faligndata %f10, %f12, %f26 + faligndata %f12, %f14, %f28 + faligndata %f14, %f0, %f30 + EXBLK4(stda %f16, [%o0] ASI_BLK_AIUS) + add %o0, 0x40, %o0 + add %o1, 0x40, %o1 + + membar #Sync /* Now we copy the (len modulo 64) bytes at the end. * Note how we borrow the %f0 loaded above. * * Also notice how this code is careful not to perform a - * load past the end of the src buffer just like similar - * code found in U3copy_to_user_toosmall processing. + * load past the end of the src buffer. */ -U3copy_to_user_loopend: - and %o2, 0x3f, %o2 ! A0 Group - andcc %o2, 0x38, %g2 ! A0 Group - be,pn %icc, U3copy_to_user_endcruft ! BR - subcc %g2, 0x8, %g2 ! A1 - be,pn %icc, U3copy_to_user_endcruft ! BR Group - cmp %g1, 0 ! A0 - - be,a,pt %icc, 1f ! BR Group - ldd [%o1 + 0x00], %f0 ! MS - -1: ldd [%o1 + 0x08], %f2 ! MS Group - add %o1, 0x8, %o1 ! A0 - sub %o2, 0x8, %o2 ! A1 - subcc %g2, 0x8, %g2 ! A0 Group - faligndata %f0, %f2, %f8 ! FGA Group - EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) ! MS (XXX does it stall here? XXX) - be,pn %icc, U3copy_to_user_endcruft ! BR - add %o0, 0x8, %o0 ! A0 - ldd [%o1 + 0x08], %f0 ! MS Group - add %o1, 0x8, %o1 ! A0 - sub %o2, 0x8, %o2 ! A1 - subcc %g2, 0x8, %g2 ! A0 Group - faligndata %f2, %f0, %f8 ! FGA - EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) ! MS (XXX does it stall here? XXX) - bne,pn %icc, 1b ! BR - add %o0, 0x8, %o0 ! A0 Group + and %o2, 0x3f, %o2 + andcc %o2, 0x38, %g2 + be,pn %XCC, 2f + subcc %g2, 0x8, %g2 + be,pn %XCC, 2f + cmp %g1, 0 + + be,a,pt %XCC, 1f + ldd [%o1 + 0x00], %f0 + +1: ldd [%o1 + 0x08], %f2 + add %o1, 0x8, %o1 + sub %o2, 0x8, %o2 + subcc %g2, 0x8, %g2 + faligndata %f0, %f2, %f8 + EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) + be,pn %XCC, 2f + add %o0, 0x8, %o0 + ldd [%o1 + 0x08], %f0 + add %o1, 0x8, %o1 + sub %o2, 0x8, %o2 + subcc %g2, 0x8, %g2 + faligndata %f2, %f0, %f8 + EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) + bne,pn %XCC, 1b + add %o0, 0x8, %o0 /* If anything is left, we copy it one byte at a time. * Note that %g1 is (src & 0x3) saved above before the * alignaddr was performed. */ -U3copy_to_user_endcruft: +2: cmp %o2, 0 add %o1, %g1, %o1 VISExitHalf - be,pn %icc, U3copy_to_user_short_ret - nop - ba,a,pt %xcc, U3copy_to_user_short - - /* If we get here, then 32 <= len < (6 * 64) */ -U3copy_to_user_toosmall: - -#ifdef SMALL_COPY_USES_FPU - - /* Is 'dst' already aligned on an 8-byte boundary? */ - be,pt %xcc, 2f ! BR Group - - /* Compute abs((dst & 7) - 8) into %g2. This is the number - * of bytes to copy to make 'dst' 8-byte aligned. We pre- - * subtract this from 'len'. - */ - sub %g2, 0x8, %g2 ! A0 - sub %g0, %g2, %g2 ! A0 Group (reg-dep) - sub %o2, %g2, %o2 ! A0 Group (reg-dep) - - /* Copy %g2 bytes from src to dst, one byte at a time. */ -1: ldub [%o1 + 0x00], %o3 ! MS (Group) (%o3 in 3 cycles) - add %o1, 0x1, %o1 ! A1 - add %o0, 0x1, %o0 ! A0 Group - subcc %g2, 0x1, %g2 ! A1 + be,pn %XCC, 85f + sub %o0, %o1, %o3 - bg,pt %icc, 1b ! BR Group - EXNV2(stba %o3, [%o0 + -1] %asi, add %o2, %g2) ! MS Group + andcc %g1, 0x7, %g0 + bne,pn %icc, 90f + andcc %o2, 0x8, %g0 + be,pt %icc, 1f + nop + ldx [%o1], %o5 + EXNV(stxa %o5, [%o1 + %o3] ASI_AIUS, add %o2, %g0) + add %o1, 0x8, %o1 -2: VISEntryHalf ! MS+MS +1: andcc %o2, 0x4, %g0 + be,pt %icc, 1f + nop + lduw [%o1], %o5 + EXNV(stwa %o5, [%o1 + %o3] ASI_AIUS, and %o2, 0x7) + add %o1, 0x4, %o1 - /* Compute (len - (len % 8)) into %g2. This is guaranteed - * to be nonzero. - */ - andn %o2, 0x7, %g2 ! A0 Group - - /* You may read this and believe that it allows reading - * one 8-byte longword past the end of src. It actually - * does not, as %g2 is subtracted as loads are done from - * src, so we always stop before running off the end. - * Also, we are guaranteed to have at least 0x10 bytes - * to move here. - */ - sub %g2, 0x8, %g2 ! A0 Group (reg-dep) - alignaddr %o1, %g0, %g1 ! MS (Break-after) - ldd [%g1 + 0x00], %f0 ! MS Group (1-cycle stall) - add %g1, 0x8, %g1 ! A0 - -1: ldd [%g1 + 0x00], %f2 ! MS Group - add %g1, 0x8, %g1 ! A0 - sub %o2, 0x8, %o2 ! A1 - subcc %g2, 0x8, %g2 ! A0 Group - - faligndata %f0, %f2, %f8 ! FGA Group (1-cycle stall) - EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) ! MS Group (2-cycle stall) - add %o1, 0x8, %o1 ! A0 - be,pn %icc, 2f ! BR - - add %o0, 0x8, %o0 ! A1 - ldd [%g1 + 0x00], %f0 ! MS Group - add %g1, 0x8, %g1 ! A0 - sub %o2, 0x8, %o2 ! A1 - - subcc %g2, 0x8, %g2 ! A0 Group - faligndata %f2, %f0, %f8 ! FGA Group (1-cycle stall) - EX(stda %f8, [%o0 + 0x00] %asi, add %o2, 0x8) ! MS Group (2-cycle stall) - add %o1, 0x8, %o1 ! A0 - - bne,pn %icc, 1b ! BR - add %o0, 0x8, %o0 ! A1 - - /* Nothing left to copy? */ -2: cmp %o2, 0 ! A0 Group - VISExitHalf ! A0+MS - be,pn %icc, U3copy_to_user_short_ret ! BR Group - nop ! A0 - ba,a,pt %xcc, U3copy_to_user_short ! BR Group - -#else /* !(SMALL_COPY_USES_FPU) */ - - xor %o1, %o0, %g2 - andcc %g2, 0x7, %g0 - bne,pn %icc, U3copy_to_user_short - andcc %o1, 0x7, %g2 - - be,pt %xcc, 2f - sub %g2, 0x8, %g2 - sub %g0, %g2, %g2 - sub %o2, %g2, %o2 +1: andcc %o2, 0x2, %g0 + be,pt %icc, 1f + nop + lduh [%o1], %o5 + EXNV(stha %o5, [%o1 + %o3] ASI_AIUS, and %o2, 0x3) + add %o1, 0x2, %o1 -1: ldub [%o1 + 0x00], %o3 - add %o1, 0x1, %o1 - add %o0, 0x1, %o0 - subcc %g2, 0x1, %g2 - bg,pt %icc, 1b - EXNV2(stba %o3, [%o0 + -1] %asi, add %o2, %g2) +1: andcc %o2, 0x1, %g0 + be,pt %icc, 85f + nop + ldub [%o1], %o5 + ba,pt %xcc, 85f + EXNV(stba %o5, [%o1 + %o3] ASI_AIUS, and %o2, 0x1) + +70: /* 16 < len <= 64 */ + bne,pn %XCC, 90f + sub %o0, %o1, %o3 + + andn %o2, 0x7, %o4 + and %o2, 0x7, %o2 +1: subcc %o4, 0x8, %o4 + ldx [%o1], %o5 + EXNV4(stxa %o5, [%o1 + %o3] ASI_AIUS, add %o2, %o4) + bgu,pt %XCC, 1b + add %o1, 0x8, %o1 + andcc %o2, 0x4, %g0 + be,pt %XCC, 1f + nop + sub %o2, 0x4, %o2 + lduw [%o1], %o5 + EXNV3(stwa %o5, [%o1 + %o3] ASI_AIUS, add %o2, %g0) + add %o1, 0x4, %o1 +1: cmp %o2, 0 + be,pt %XCC, 85f + nop + ba,pt %xcc, 90f + nop -2: andn %o2, 0x7, %g2 - sub %o2, %g2, %o2 +80: /* 0 < len <= 16 */ + andcc %o3, 0x3, %g0 + bne,pn %XCC, 90f + sub %o0, %o1, %o3 -3: ldx [%o1 + 0x00], %o3 - add %o1, 0x8, %o1 - add %o0, 0x8, %o0 - subcc %g2, 0x8, %g2 - bg,pt %icc, 3b - EXNV3(stxa %o3, [%o0 + -8] %asi, add %o2, %g2) +1: + subcc %o2, 4, %o2 + lduw [%o1], %g1 + EXNV3(stwa %g1, [%o1 + %o3] ASI_AIUS, add %o2, %g0) + bgu,pt %XCC, 1b + add %o1, 4, %o1 - cmp %o2, 0 - bne,pn %icc, U3copy_to_user_short - nop - ba,a,pt %xcc, U3copy_to_user_short_ret +85: retl + clr %o0 -#endif /* !(SMALL_COPY_USES_FPU) */ + .align 32 +90: + subcc %o2, 1, %o2 + ldub [%o1], %g1 + EXNV2(stba %g1, [%o1 + %o3] ASI_AIUS, add %o2, %g0) + bgu,pt %XCC, 90b + add %o1, 1, %o1 + retl + clr %o0