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a52312b88c
Properly return the original destination buffer pointer. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Kjetil Oftedal <oftedal@gmail.com>
542 lines
11 KiB
ArmAsm
542 lines
11 KiB
ArmAsm
/* memcpy.S: Sparc optimized memcpy and memmove code
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* Hand optimized from GNU libc's memcpy and memmove
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* Copyright (C) 1991,1996 Free Software Foundation
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* Copyright (C) 1995 Linus Torvalds (Linus.Torvalds@helsinki.fi)
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#define FUNC(x) \
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.globl x; \
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.type x,@function; \
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.align 4; \
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x:
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/* Both these macros have to start with exactly the same insn */
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#define MOVE_BIGCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [%src + (offset) + 0x00], %t0; \
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ldd [%src + (offset) + 0x08], %t2; \
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ldd [%src + (offset) + 0x10], %t4; \
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ldd [%src + (offset) + 0x18], %t6; \
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st %t0, [%dst + (offset) + 0x00]; \
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st %t1, [%dst + (offset) + 0x04]; \
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st %t2, [%dst + (offset) + 0x08]; \
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st %t3, [%dst + (offset) + 0x0c]; \
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st %t4, [%dst + (offset) + 0x10]; \
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st %t5, [%dst + (offset) + 0x14]; \
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st %t6, [%dst + (offset) + 0x18]; \
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st %t7, [%dst + (offset) + 0x1c];
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#define MOVE_BIGALIGNCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [%src + (offset) + 0x00], %t0; \
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ldd [%src + (offset) + 0x08], %t2; \
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ldd [%src + (offset) + 0x10], %t4; \
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ldd [%src + (offset) + 0x18], %t6; \
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std %t0, [%dst + (offset) + 0x00]; \
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std %t2, [%dst + (offset) + 0x08]; \
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std %t4, [%dst + (offset) + 0x10]; \
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std %t6, [%dst + (offset) + 0x18];
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#define MOVE_LASTCHUNK(src, dst, offset, t0, t1, t2, t3) \
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ldd [%src - (offset) - 0x10], %t0; \
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ldd [%src - (offset) - 0x08], %t2; \
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st %t0, [%dst - (offset) - 0x10]; \
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st %t1, [%dst - (offset) - 0x0c]; \
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st %t2, [%dst - (offset) - 0x08]; \
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st %t3, [%dst - (offset) - 0x04];
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#define MOVE_LASTALIGNCHUNK(src, dst, offset, t0, t1, t2, t3) \
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ldd [%src - (offset) - 0x10], %t0; \
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ldd [%src - (offset) - 0x08], %t2; \
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std %t0, [%dst - (offset) - 0x10]; \
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std %t2, [%dst - (offset) - 0x08];
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#define MOVE_SHORTCHUNK(src, dst, offset, t0, t1) \
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ldub [%src - (offset) - 0x02], %t0; \
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ldub [%src - (offset) - 0x01], %t1; \
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stb %t0, [%dst - (offset) - 0x02]; \
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stb %t1, [%dst - (offset) - 0x01];
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/* Both these macros have to start with exactly the same insn */
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#define RMOVE_BIGCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [%src - (offset) - 0x20], %t0; \
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ldd [%src - (offset) - 0x18], %t2; \
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ldd [%src - (offset) - 0x10], %t4; \
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ldd [%src - (offset) - 0x08], %t6; \
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st %t0, [%dst - (offset) - 0x20]; \
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st %t1, [%dst - (offset) - 0x1c]; \
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st %t2, [%dst - (offset) - 0x18]; \
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st %t3, [%dst - (offset) - 0x14]; \
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st %t4, [%dst - (offset) - 0x10]; \
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st %t5, [%dst - (offset) - 0x0c]; \
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st %t6, [%dst - (offset) - 0x08]; \
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st %t7, [%dst - (offset) - 0x04];
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#define RMOVE_BIGALIGNCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [%src - (offset) - 0x20], %t0; \
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ldd [%src - (offset) - 0x18], %t2; \
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ldd [%src - (offset) - 0x10], %t4; \
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ldd [%src - (offset) - 0x08], %t6; \
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std %t0, [%dst - (offset) - 0x20]; \
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std %t2, [%dst - (offset) - 0x18]; \
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std %t4, [%dst - (offset) - 0x10]; \
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std %t6, [%dst - (offset) - 0x08];
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#define RMOVE_LASTCHUNK(src, dst, offset, t0, t1, t2, t3) \
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ldd [%src + (offset) + 0x00], %t0; \
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ldd [%src + (offset) + 0x08], %t2; \
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st %t0, [%dst + (offset) + 0x00]; \
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st %t1, [%dst + (offset) + 0x04]; \
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st %t2, [%dst + (offset) + 0x08]; \
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st %t3, [%dst + (offset) + 0x0c];
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#define RMOVE_SHORTCHUNK(src, dst, offset, t0, t1) \
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ldub [%src + (offset) + 0x00], %t0; \
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ldub [%src + (offset) + 0x01], %t1; \
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stb %t0, [%dst + (offset) + 0x00]; \
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stb %t1, [%dst + (offset) + 0x01];
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#define SMOVE_CHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, prev, shil, shir, offset2) \
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ldd [%src + (offset) + 0x00], %t0; \
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ldd [%src + (offset) + 0x08], %t2; \
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srl %t0, shir, %t5; \
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srl %t1, shir, %t6; \
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sll %t0, shil, %t0; \
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or %t5, %prev, %t5; \
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sll %t1, shil, %prev; \
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or %t6, %t0, %t0; \
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srl %t2, shir, %t1; \
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srl %t3, shir, %t6; \
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sll %t2, shil, %t2; \
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or %t1, %prev, %t1; \
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std %t4, [%dst + (offset) + (offset2) - 0x04]; \
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std %t0, [%dst + (offset) + (offset2) + 0x04]; \
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sll %t3, shil, %prev; \
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or %t6, %t2, %t4;
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#define SMOVE_ALIGNCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, prev, shil, shir, offset2) \
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ldd [%src + (offset) + 0x00], %t0; \
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ldd [%src + (offset) + 0x08], %t2; \
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srl %t0, shir, %t4; \
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srl %t1, shir, %t5; \
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sll %t0, shil, %t6; \
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or %t4, %prev, %t0; \
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sll %t1, shil, %prev; \
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or %t5, %t6, %t1; \
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srl %t2, shir, %t4; \
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srl %t3, shir, %t5; \
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sll %t2, shil, %t6; \
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or %t4, %prev, %t2; \
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sll %t3, shil, %prev; \
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or %t5, %t6, %t3; \
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std %t0, [%dst + (offset) + (offset2) + 0x00]; \
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std %t2, [%dst + (offset) + (offset2) + 0x08];
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.text
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.align 4
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0:
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retl
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nop ! Only bcopy returns here and it retuns void...
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#ifdef __KERNEL__
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FUNC(amemmove)
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FUNC(__memmove)
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#endif
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FUNC(memmove)
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cmp %o0, %o1
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mov %o0, %g7
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bleu 9f
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sub %o0, %o1, %o4
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add %o1, %o2, %o3
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cmp %o3, %o0
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bleu 0f
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andcc %o4, 3, %o5
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add %o1, %o2, %o1
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add %o0, %o2, %o0
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sub %o1, 1, %o1
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sub %o0, 1, %o0
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1: /* reverse_bytes */
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ldub [%o1], %o4
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subcc %o2, 1, %o2
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stb %o4, [%o0]
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sub %o1, 1, %o1
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bne 1b
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sub %o0, 1, %o0
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retl
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mov %g7, %o0
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/* NOTE: This code is executed just for the cases,
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where %src (=%o1) & 3 is != 0.
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We need to align it to 4. So, for (%src & 3)
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1 we need to do ldub,lduh
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2 lduh
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3 just ldub
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so even if it looks weird, the branches
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are correct here. -jj
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*/
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78: /* dword_align */
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andcc %o1, 1, %g0
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be 4f
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andcc %o1, 2, %g0
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ldub [%o1], %g2
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add %o1, 1, %o1
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stb %g2, [%o0]
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sub %o2, 1, %o2
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bne 3f
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add %o0, 1, %o0
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4:
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lduh [%o1], %g2
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add %o1, 2, %o1
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sth %g2, [%o0]
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sub %o2, 2, %o2
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b 3f
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add %o0, 2, %o0
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FUNC(memcpy) /* %o0=dst %o1=src %o2=len */
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sub %o0, %o1, %o4
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mov %o0, %g7
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9:
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andcc %o4, 3, %o5
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0:
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bne 86f
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cmp %o2, 15
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bleu 90f
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andcc %o1, 3, %g0
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bne 78b
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3:
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andcc %o1, 4, %g0
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be 2f
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mov %o2, %g1
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ld [%o1], %o4
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sub %g1, 4, %g1
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st %o4, [%o0]
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add %o1, 4, %o1
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add %o0, 4, %o0
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2:
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andcc %g1, 0xffffff80, %g0
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be 3f
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andcc %o0, 4, %g0
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be 82f + 4
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5:
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MOVE_BIGCHUNK(o1, o0, 0x00, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
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sub %g1, 128, %g1
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add %o1, 128, %o1
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cmp %g1, 128
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bge 5b
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add %o0, 128, %o0
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3:
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andcc %g1, 0x70, %g4
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be 80f
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andcc %g1, 8, %g0
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sethi %hi(80f), %o5
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srl %g4, 1, %o4
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add %g4, %o4, %o4
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add %o1, %g4, %o1
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sub %o5, %o4, %o5
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jmpl %o5 + %lo(80f), %g0
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add %o0, %g4, %o0
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79: /* memcpy_table */
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MOVE_LASTCHUNK(o1, o0, 0x60, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x50, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x40, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x30, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x20, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x10, g2, g3, g4, g5)
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MOVE_LASTCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
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80: /* memcpy_table_end */
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be 81f
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andcc %g1, 4, %g0
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ldd [%o1], %g2
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add %o0, 8, %o0
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st %g2, [%o0 - 0x08]
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add %o1, 8, %o1
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st %g3, [%o0 - 0x04]
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81: /* memcpy_last7 */
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be 1f
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andcc %g1, 2, %g0
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ld [%o1], %g2
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add %o1, 4, %o1
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st %g2, [%o0]
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add %o0, 4, %o0
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1:
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be 1f
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andcc %g1, 1, %g0
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lduh [%o1], %g2
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add %o1, 2, %o1
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sth %g2, [%o0]
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add %o0, 2, %o0
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1:
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be 1f
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nop
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ldub [%o1], %g2
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stb %g2, [%o0]
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1:
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retl
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mov %g7, %o0
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82: /* ldd_std */
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MOVE_BIGALIGNCHUNK(o1, o0, 0x00, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGALIGNCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGALIGNCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
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MOVE_BIGALIGNCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
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subcc %g1, 128, %g1
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add %o1, 128, %o1
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cmp %g1, 128
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bge 82b
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add %o0, 128, %o0
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andcc %g1, 0x70, %g4
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be 84f
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andcc %g1, 8, %g0
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sethi %hi(84f), %o5
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add %o1, %g4, %o1
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sub %o5, %g4, %o5
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jmpl %o5 + %lo(84f), %g0
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add %o0, %g4, %o0
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83: /* amemcpy_table */
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MOVE_LASTALIGNCHUNK(o1, o0, 0x60, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x50, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x40, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x30, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x20, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x10, g2, g3, g4, g5)
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MOVE_LASTALIGNCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
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84: /* amemcpy_table_end */
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be 85f
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andcc %g1, 4, %g0
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ldd [%o1], %g2
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add %o0, 8, %o0
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std %g2, [%o0 - 0x08]
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add %o1, 8, %o1
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85: /* amemcpy_last7 */
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be 1f
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andcc %g1, 2, %g0
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ld [%o1], %g2
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add %o1, 4, %o1
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st %g2, [%o0]
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add %o0, 4, %o0
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1:
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be 1f
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andcc %g1, 1, %g0
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lduh [%o1], %g2
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add %o1, 2, %o1
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sth %g2, [%o0]
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add %o0, 2, %o0
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1:
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be 1f
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nop
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ldub [%o1], %g2
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stb %g2, [%o0]
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1:
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retl
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mov %g7, %o0
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86: /* non_aligned */
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cmp %o2, 6
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bleu 88f
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nop
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save %sp, -96, %sp
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andcc %i0, 3, %g0
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be 61f
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andcc %i0, 1, %g0
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be 60f
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andcc %i0, 2, %g0
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ldub [%i1], %g5
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add %i1, 1, %i1
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stb %g5, [%i0]
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sub %i2, 1, %i2
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bne 61f
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add %i0, 1, %i0
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60:
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ldub [%i1], %g3
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add %i1, 2, %i1
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stb %g3, [%i0]
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sub %i2, 2, %i2
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ldub [%i1 - 1], %g3
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add %i0, 2, %i0
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stb %g3, [%i0 - 1]
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61:
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and %i1, 3, %g2
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and %i2, 0xc, %g3
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and %i1, -4, %i1
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cmp %g3, 4
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sll %g2, 3, %g4
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mov 32, %g2
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be 4f
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sub %g2, %g4, %l0
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blu 3f
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cmp %g3, 0x8
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be 2f
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srl %i2, 2, %g3
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ld [%i1], %i3
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add %i0, -8, %i0
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ld [%i1 + 4], %i4
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b 8f
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add %g3, 1, %g3
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2:
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ld [%i1], %i4
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|
add %i0, -12, %i0
|
|
ld [%i1 + 4], %i5
|
|
add %g3, 2, %g3
|
|
b 9f
|
|
add %i1, -4, %i1
|
|
3:
|
|
ld [%i1], %g1
|
|
add %i0, -4, %i0
|
|
ld [%i1 + 4], %i3
|
|
srl %i2, 2, %g3
|
|
b 7f
|
|
add %i1, 4, %i1
|
|
4:
|
|
ld [%i1], %i5
|
|
cmp %i2, 7
|
|
ld [%i1 + 4], %g1
|
|
srl %i2, 2, %g3
|
|
bleu 10f
|
|
add %i1, 8, %i1
|
|
|
|
ld [%i1], %i3
|
|
add %g3, -1, %g3
|
|
5:
|
|
sll %i5, %g4, %g2
|
|
srl %g1, %l0, %g5
|
|
or %g2, %g5, %g2
|
|
st %g2, [%i0]
|
|
7:
|
|
ld [%i1 + 4], %i4
|
|
sll %g1, %g4, %g2
|
|
srl %i3, %l0, %g5
|
|
or %g2, %g5, %g2
|
|
st %g2, [%i0 + 4]
|
|
8:
|
|
ld [%i1 + 8], %i5
|
|
sll %i3, %g4, %g2
|
|
srl %i4, %l0, %g5
|
|
or %g2, %g5, %g2
|
|
st %g2, [%i0 + 8]
|
|
9:
|
|
ld [%i1 + 12], %g1
|
|
sll %i4, %g4, %g2
|
|
srl %i5, %l0, %g5
|
|
addcc %g3, -4, %g3
|
|
or %g2, %g5, %g2
|
|
add %i1, 16, %i1
|
|
st %g2, [%i0 + 12]
|
|
add %i0, 16, %i0
|
|
bne,a 5b
|
|
ld [%i1], %i3
|
|
10:
|
|
sll %i5, %g4, %g2
|
|
srl %g1, %l0, %g5
|
|
srl %l0, 3, %g3
|
|
or %g2, %g5, %g2
|
|
sub %i1, %g3, %i1
|
|
andcc %i2, 2, %g0
|
|
st %g2, [%i0]
|
|
be 1f
|
|
andcc %i2, 1, %g0
|
|
|
|
ldub [%i1], %g2
|
|
add %i1, 2, %i1
|
|
stb %g2, [%i0 + 4]
|
|
add %i0, 2, %i0
|
|
ldub [%i1 - 1], %g2
|
|
stb %g2, [%i0 + 3]
|
|
1:
|
|
be 1f
|
|
nop
|
|
ldub [%i1], %g2
|
|
stb %g2, [%i0 + 4]
|
|
1:
|
|
ret
|
|
restore %g7, %g0, %o0
|
|
|
|
88: /* short_end */
|
|
|
|
and %o2, 0xe, %o3
|
|
20:
|
|
sethi %hi(89f), %o5
|
|
sll %o3, 3, %o4
|
|
add %o0, %o3, %o0
|
|
sub %o5, %o4, %o5
|
|
add %o1, %o3, %o1
|
|
jmpl %o5 + %lo(89f), %g0
|
|
andcc %o2, 1, %g0
|
|
|
|
MOVE_SHORTCHUNK(o1, o0, 0x0c, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x0a, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x08, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x06, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x04, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x02, g2, g3)
|
|
MOVE_SHORTCHUNK(o1, o0, 0x00, g2, g3)
|
|
|
|
89: /* short_table_end */
|
|
|
|
be 1f
|
|
nop
|
|
|
|
ldub [%o1], %g2
|
|
stb %g2, [%o0]
|
|
1:
|
|
retl
|
|
mov %g7, %o0
|
|
|
|
90: /* short_aligned_end */
|
|
bne 88b
|
|
andcc %o2, 8, %g0
|
|
|
|
be 1f
|
|
andcc %o2, 4, %g0
|
|
|
|
ld [%o1 + 0x00], %g2
|
|
ld [%o1 + 0x04], %g3
|
|
add %o1, 8, %o1
|
|
st %g2, [%o0 + 0x00]
|
|
st %g3, [%o0 + 0x04]
|
|
add %o0, 8, %o0
|
|
1:
|
|
b 81b
|
|
mov %o2, %g1
|