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authorThomas Martitz <kugel@rockbox.org>2012-01-07 19:56:09 +0100
committerThomas Martitz <kugel@rockbox.org>2012-01-22 18:46:45 +0100
commita035261089403de259e74ce4dd196e2715138ed2 (patch)
tree440d75109a7ebfefef2a58076b38b1bfe9db8f63 /firmware/target/coldfire/memcpy-coldfire.S
parent8e8e978de6b6283b66a6829fa8c5e3b94674ce7d (diff)
downloadrockbox-a035261089403de259e74ce4dd196e2715138ed2.tar.gz
rockbox-a035261089403de259e74ce4dd196e2715138ed2.zip
Move optimized memcpy and friends and strlen to firmware/asm,
using the new automatic-asm-picking infrastructure.
Diffstat (limited to 'firmware/target/coldfire/memcpy-coldfire.S')
-rw-r--r--firmware/target/coldfire/memcpy-coldfire.S682
1 files changed, 0 insertions, 682 deletions
diff --git a/firmware/target/coldfire/memcpy-coldfire.S b/firmware/target/coldfire/memcpy-coldfire.S
deleted file mode 100644
index 9762e31e02..0000000000
--- a/firmware/target/coldfire/memcpy-coldfire.S
+++ /dev/null
@@ -1,682 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2004-2005 by Jens Arnold
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-#include "config.h"
-
- .section .icode,"ax",@progbits
-
-#define FULLSPEED /* use burst writing for word aligned destinations */
- .align 2
- .global memcpy
- .global __memcpy_fwd_entry
- .type memcpy,@function
-
-/* Copies <length> bytes of data in memory from <source> to <dest>
- * This version is optimized for speed
- *
- * arguments:
- * (4,%sp) - destination address
- * (8,%sp) - source address
- * (12,%sp) - length
- *
- * return value:
- * %d0 - destination address (like ANSI version)
- *
- * register usage:
- * %a0 - current source address
- * %a1 - current dest address
- * %a2 - source end address (in line-copy loops)
- * %d0 - data / scratch
- * %d1 - source end address (byte and longword copy) / data / scratch
- * %d2 - data / scratch
- * %d3..%d7 - data
- *
- * For maximum speed this routine reads and writes whole lines using burst
- * move (movem.l) where possible. For byte aligned destinations (long+1 and
- * long+3) it writes longwords only. Same goes for word aligned destinations
- * if FULLSPEED is undefined.
- */
-memcpy:
- move.l (4,%sp),%a1 /* Destination */
- move.l (8,%sp),%a0 /* Source */
- move.l (12,%sp),%d1 /* Length */
-
-__memcpy_fwd_entry:
- add.l %a0,%d1 /* %d1 = source end */
-
- move.l %a0,%d0
- addq.l #7,%d0
- and.l #0xFFFFFFFC,%d0 /* %d0 = first source long bound + 4 */
- cmp.l %d0,%d1 /* at least one aligned longword to copy? */
- blo.w .bytes2_start /* no, jump directly to trailing byte loop */
-
- subq.l #4,%d0 /* %d0 = first source long bound */
- cmp.l %a0,%d0 /* any bytes to copy? */
- jls .bytes1_end /* no: skip byte loop */
-
- /* leading byte loop: copies 0..3 bytes */
-.bytes1_loop:
- move.b (%a0)+,(%a1)+ /* copy byte */
- cmp.l %a0,%d0 /* runs %a0 up to first long bound */
- jhi .bytes1_loop
-
-.bytes1_end:
- moveq.l #31,%d0
- add.l %a0,%d0
- and.l #0xFFFFFFF0,%d0 /* %d0 = first source line bound + 16 */
- cmp.l %d0,%d1 /* at least one aligned line to copy? */
- blo.w .long_start /* no: jump to longword copy loop */
-
- lea.l (-28,%sp),%sp /* free up some registers */
- movem.l %d2-%d7/%a2,(%sp)
-
- moveq.l #16,%d2
- sub.l %d2,%d0 /* %d0 = first source line bound */
- move.l %d1,%a2 /* %a2 = end address */
- lea.l (-15,%a2),%a2 /* adjust end address for loops doing 16 bytes/ pass */
- move.l %a1,%d1
- moveq.l #3,%d2 /* mask */
- and.l %d2,%d1
- jmp.l (2,%pc,%d1.l*4) /* switch (dest_addr & 3) */
- bra.w .lines_do0_start
- bra.w .lines_do1_start
- bra.w .lines_do2_start
- /* bra.w .lines_do3_start implicit */
-
- /* byte aligned destination (long + 3): use line burst reads in main loop */
-.lines_do3_start:
- moveq.l #24,%d1 /* shift count for shifting by 3 bytes */
- cmp.l %a0,%d0 /* any leading longwords? */
- jhi .lines_do3_head_start /* yes: leading longword copy */
-
- movem.l (%a0),%d4-%d7 /* load first line */
- lea.l (16,%a0),%a0
- move.l %d4,%d2
- lsr.l %d1,%d2 /* get high byte of first longword */
- move.b %d2,(%a1)+ /* store byte */
- jra .lines_do3_entry /* jump into main loop */
-
-.lines_do3_head_start:
- move.l (%a0)+,%d7 /* load first longword */
- move.l %d7,%d2
- lsr.l %d1,%d2 /* get high byte */
- move.b %d2,(%a1)+ /* store byte */
- jra .lines_do3_head_entry /* jump into leading longword loop */
-
-.lines_do3_head_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- move.l %d7,%d2
- lsr.l %d1,%d2 /* get high byte */
- or.l %d2,%d6 /* combine with old lower 3 bytes */
- move.l %d6,(%a1)+ /* store longword */
-.lines_do3_head_entry:
- lsl.l #8,%d7 /* shift up lower 3 bytes */
- cmp.l %a0,%d0 /* runs %a0 up to first line bound */
- jhi .lines_do3_head_loop
-
-.lines_do3_loop:
- move.l %d7,%d3 /* move last longword of old line away */
- movem.l (%a0),%d4-%d7 /* load new line */
- lea.l (16,%a0),%a0
- move.l %d4,%d2
- lsr.l %d1,%d2 /* get high byte of 1st longword */
- or.l %d2,%d3 /* combine with old lower 3 bytes */
- move.l %d3,(%a1)+ /* store longword */
-.lines_do3_entry:
- lsl.l #8,%d4 /* shift up lower 3 bytes */
- move.l %d5,%d2
- lsr.l %d1,%d2 /* get high byte of 2nd longword */
- or.l %d2,%d4 /* combine with 1st lower 3 bytes */
- move.l %d4,(%a1)+ /* store longword */
- lsl.l #8,%d5 /* shift up lower 3 bytes */
- move.l %d6,%d2
- lsr.l %d1,%d2 /* get high byte of 3rd longword */
- or.l %d2,%d5 /* combine with 2nd lower 3 bytes */
- move.l %d5,(%a1)+ /* store longword */
- lsl.l #8,%d6 /* shift up lower 3 bytes */
- move.l %d7,%d2
- lsr.l %d1,%d2 /* get high byte of 4th longword */
- or.l %d2,%d6 /* combine with 3rd lower 3 bytes */
- move.l %d6,(%a1)+ /* store longword */
- lsl.l #8,%d7 /* shift up lower 3 bytes */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_do3_loop
-
- lea.l (12,%a2),%a2 /* readjust end address for doing longwords */
- cmp.l %a0,%a2 /* any trailing longwords? */
- jls .lines_do3_tail_end /* no: just store last lower 3 bytes */
-
-.lines_do3_tail_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- move.l %d7,%d2
- lsr.l %d1,%d2 /* get high byte */
- or.l %d2,%d6 /* combine with old lower 3 bytes */
- move.l %d6,(%a1)+ /* store longword */
- lsl.l #8,%d7 /* shift up lower 3 bytes */
- cmp.l %a0,%a2 /* runs %a0 up to last long bound */
- jhi .lines_do3_tail_loop
-
-.lines_do3_tail_end:
- swap %d7 /* get high word */
- move.w %d7,(%a1)+ /* store word */
- lsr.l %d1,%d7 /* get moved-up low byte */
- move.b %d7,(%a1)+ /* store byte */
- jra .lines_end
-
- /* byte aligned destination (long + 1): use line burst reads in main loop */
-.lines_do1_start:
- moveq.l #24,%d1 /* shift count for shifting by 3 bytes */
- cmp.l %a0,%d0 /* any leading longwords? */
- jhi .lines_do1_head_start /* yes: leading longword copy */
-
- movem.l (%a0),%d4-%d7 /* load first line */
- lea.l (16,%a0),%a0
- move.l %d4,%d2 /* first longword, bytes 3210 */
- lsr.l #8,%d2 /* first longword, bytes .321 */
- swap %d2 /* first longword, bytes 21.3 */
- move.b %d2,(%a1)+ /* store byte */
- swap %d2 /* first longword, bytes .321 */
- move.w %d2,(%a1)+ /* store word */
- jra .lines_do1_entry
-
-.lines_do1_head_start:
- move.l (%a0)+,%d7 /* load first longword */
- move.l %d7,%d2 /* first longword, bytes 3210 */
- lsr.l #8,%d2 /* first longword, bytes .321 */
- swap %d2 /* first longword, bytes 21.3 */
- move.b %d2,(%a1)+ /* store byte */
- swap %d2 /* first longword, bytes .321 */
- move.w %d2,(%a1)+ /* store word */
- jra .lines_do1_head_entry
-
-.lines_do1_head_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- move.l %d7,%d2
- lsr.l #8,%d2 /* get upper 3 bytes */
- or.l %d2,%d6 /* combine with old low byte */
- move.l %d6,(%a1)+ /* store longword */
-.lines_do1_head_entry:
- lsl.l %d1,%d7 /* shift up low byte */
- cmp.l %a0,%d0 /* runs %a0 up to first line bound */
- jhi .lines_do1_head_loop
-
-.lines_do1_loop:
- move.l %d7,%d3 /* move last longword of old line away */
- movem.l (%a0),%d4-%d7 /* load new line */
- lea.l (16,%a0),%a0
- move.l %d4,%d2
- lsr.l #8,%d2 /* get upper 3 bytes of 1st longword */
- or.l %d2,%d3 /* combine with low byte of old longword */
- move.l %d3,(%a1)+ /* store longword */
-.lines_do1_entry:
- lsl.l %d1,%d4 /* shift up low byte */
- move.l %d5,%d2
- lsr.l #8,%d2 /* get upper 3 bytes of 2nd longword */
- or.l %d2,%d4 /* combine with low byte of 1st longword */
- move.l %d4,(%a1)+ /* store longword */
- lsl.l %d1,%d5 /* shift up low byte */
- move.l %d6,%d2
- lsr.l #8,%d2 /* get upper 3 bytes of 3rd longword */
- or.l %d2,%d5 /* combine with low byte of 2nd longword */
- move.l %d5,(%a1)+ /* store longword */
- lsl.l %d1,%d6 /* shift up low byte */
- move.l %d7,%d2
- lsr.l #8,%d2 /* get upper 3 bytes of 4th longword */
- or.l %d2,%d6 /* combine with low byte of 4th longword */
- move.l %d6,(%a1)+ /* store longword */
- lsl.l %d1,%d7 /* shift up low byte */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_do1_loop
-
- lea.l (12,%a2),%a2 /* readjust end address for doing longwords */
- cmp.l %a0,%a2 /* any trailing longwords? */
- jls .lines_do1_tail_end /* no: just store last low byte */
-
-.lines_do1_tail_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- move.l %d7,%d2
- lsr.l #8,%d2 /* get upper 3 bytes */
- or.l %d2,%d6 /* combine with old low byte */
- move.l %d6,(%a1)+ /* store longword */
- lsl.l %d1,%d7 /* shift up low byte */
- cmp.l %a0,%a2 /* runs %a0 up to last long bound */
- jhi .lines_do1_tail_loop
-
-.lines_do1_tail_end:
- lsr.l %d1,%d7 /* get shifted-up low byte */
- move.b %d7,(%a1)+ /* store byte */
- jra .lines_end
-
- /* long aligned destination (line + 0/4/8/12): head */
-.lines_do0_head_loop:
- move.l (%a0)+,(%a1)+ /* copy longword */
-.lines_do0_start:
- cmp.l %a0,%d0 /* runs %a0 up to first line bound */
- jhi .lines_do0_head_loop
-
-.lines_do0_head_end:
- move.l %a1,%d1
- lsr.l #2,%d1
- moveq.l #3,%d0 /* mask */
- and.l %d0,%d1
- moveq.l #16,%d0 /* address increment for one main loop pass */
- jmp.l (2,%pc,%d1.l*2) /* switch ((dest_addr >> 2) & 3) */
- bra.b .lines_lo0_start
- bra.b .lines_lo4_start
- bra.b .lines_lo8_start
- /* bra.b .lines_lo12_start implicit */
-
- /* long aligned destination (line + 12): use line bursts in the loop */
-.lines_lo12_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- move.l %d4,(%a1)+ /* store 1st longword */
- cmp.l %a0,%a2 /* any full lines? */
- jls .lines_lo12_end /* no: skip main loop */
-
-.lines_lo12_loop:
- move.l %d5,%d1 /* move last 3 longwords of old line away */
- move.l %d6,%d2
- move.l %d7,%d3
- movem.l (%a0),%d4-%d7 /* load new line */
- add.l %d0,%a0
- movem.l %d1-%d4,(%a1) /* store line (3 old + 1 new longwords) */
- add.l %d0,%a1
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo12_loop
-
- /* long aligned destination (line + 0/4/8/12): tail */
-.lines_lo12_end:
- move.l %d5,(%a1)+ /* store 3rd last longword */
-.lines_lo8_end:
- move.l %d6,(%a1)+ /* store 2nd last longword */
-.lines_lo4_end:
- move.l %d7,(%a1)+ /* store last longword */
-.lines_lo0_end:
- lea.l (12,%a2),%a2 /* readjust end address for doing longwords */
- cmp.l %a0,%a2 /* any trailing longwords? */
- jls .lines_end /* no: get outta here */
-
-.lines_do0_tail_loop:
- move.l (%a0)+,(%a1)+ /* copy longword */
- cmp.l %a0,%a2 /* runs %a0 up to last long bound */
- jhi .lines_do0_tail_loop
-
- jra .lines_end
-
- /* line aligned destination: use line bursts in the loop */
-.lines_lo0_start:
-.lines_lo0_loop:
- movem.l (%a0),%d4-%d7 /* load line */
- add.l %d0,%a0
- movem.l %d4-%d7,(%a1) /* store line */
- add.l %d0,%a1
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo0_loop
-
- jra .lines_lo0_end /* handle trailing longwords */
-
- /* long aligned destination (line + 4): use line bursts in the loop */
-.lines_lo4_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- move.l %d4,(%a1)+ /* store 1st longword */
- move.l %d5,(%a1)+ /* store 2nd longword */
- move.l %d6,(%a1)+ /* store 3rd longword */
- cmp.l %a0,%a2 /* any full lines? */
- jls .lines_lo4_end /* no: skip main loop */
-
-.lines_lo4_loop:
- move.l %d7,%d3 /* move last longword of old line away */
- movem.l (%a0),%d4-%d7 /* load new line */
- add.l %d0,%a0
- movem.l %d3-%d6,(%a1) /* store line (1 old + 3 new longwords) */
- add.l %d0,%a1
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo4_loop
-
- jra .lines_lo4_end /* handle trailing longwords */
-
- /* long aligned destination (line + 8): use line bursts in the loop */
-.lines_lo8_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- move.l %d4,(%a1)+ /* store 1st longword */
- move.l %d5,(%a1)+ /* store 2nd longword */
- cmp.l %a0,%a2
- jls .lines_lo8_end
-
-.lines_lo8_loop:
- move.l %d6,%d2 /* move last 2 longwords of old line away */
- move.l %d7,%d3
- movem.l (%a0),%d4-%d7 /* load new line */
- add.l %d0,%a0
- movem.l %d2-%d5,(%a1) /* store line (2 old + 2 new longwords) */
- add.l %d0,%a1
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo8_loop
-
- jra .lines_lo8_end /* handle trailing longwords */
-
-#ifdef FULLSPEED
-
- /* word aligned destination (line + 2/6/10/14): head */
-.lines_do2_start:
- cmp.l %a0,%d0 /* any leading longwords? */
- jls .lines_do2_selector /* no: jump to mainloop selector */
-
- move.l (%a0)+,%d7 /* load first longword */
- swap %d7 /* swap words */
- move.w %d7,(%a1)+ /* store high word */
- cmp.l %a0,%d0 /* any more longword? */
- jls .lines_do2_head_end /* no: skip head loop */
-
-.lines_do2_head_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- swap %d7 /* swap words */
- move.w %d7,%d6 /* combine high word with old low word */
- move.l %d6,(%a1)+ /* store longword */
- cmp.l %a0,%d0 /* runs %a0 up to first line bound */
- jhi .lines_do2_head_loop
-
-.lines_do2_head_end:
- swap %d7 /* undo swap */
- move.w %d7,(%a1)+ /* store word */
-
-.lines_do2_selector:
- move.l %a1,%d1
- lsr.l #2,%d1
- moveq.l #3,%d0 /* mask */
- and.l %d0,%d1
- moveq.l #16,%d0 /* address increment for one main loop pass */
- jmp.l (2,%pc,%d1.l*4) /* switch ((dest_addr >> 2) & 3) */
- bra.w .lines_lo2_start
- bra.w .lines_lo6_start
- bra.w .lines_lo10_start
- /* bra.w .lines_lo14_start implicit */
-
- /* word aligned destination (line + 14): use line bursts in the loop */
-.lines_lo14_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,(%a1)+ /* store word */
- jra .lines_lo14_entry /* jump into main loop */
-
-.lines_lo14_loop:
- move.l %d4,%d0 /* move old line away */
- move.l %d5,%d1
- move.l %d6,%d2
- move.l %d7,%d3
- movem.l (%a0),%d4-%d7 /* load new line */
- lea.l (16,%a0),%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,%d3 /* combine 1st high word with old low word */
- movem.l %d0-%d3,(%a1) /* store line */
- lea.l (16,%a1),%a1
-.lines_lo14_entry:
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo14_loop
-
- /* word aligned destination (line + 2/6/10/14): tail */
-.lines_lo14_end:
- move.l %d4,(%a1)+ /* store third last longword */
-.lines_lo10_end:
- move.l %d5,(%a1)+ /* store second last longword */
-.lines_lo6_end:
- move.l %d6,(%a1)+ /* store last longword */
-.lines_lo2_end:
- lea.l (12,%a2),%a2 /* readjust end address for doing longwords */
- cmp.l %a0,%a2 /* any trailing longwords? */
- jls .lines_do2_tail_end /* no: skip tail loop */
-
-.lines_do2_tail_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- swap %d7 /* swap words */
- move.w %d7,%d6 /* combine high word with old low word */
- move.l %d6,(%a1)+ /* store longword */
- cmp.l %a0,%a2 /* runs %a0 up to last long bound */
- jhi .lines_do2_tail_loop
-
-.lines_do2_tail_end:
- swap %d7 /* undo swap */
- move.w %d7,(%a1)+ /* store last word */
- jra .lines_end
-
- /* word aligned destination (line + 2): use line bursts in the loop */
-.lines_lo2_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,(%a1)+ /* store high word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3nd high word with 2nd low word */
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- move.l %d4,(%a1)+ /* store 1st longword */
- move.l %d5,(%a1)+ /* store 2nd longword */
- move.l %d6,(%a1)+ /* store 3rd longword */
- cmp.l %a0,%a2 /* any full lines? */
- jls .lines_lo2_end /* no: skip main loop */
-
-.lines_lo2_loop:
- move.l %d7,%d3 /* move last longword of old line away */
- movem.l (%a0),%d4-%d7 /* load line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,%d3 /* combine 1st high word with old low word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- movem.l %d3-%d6,(%a1) /* store line */
- add.l %d0,%a1
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo2_loop
-
- jra .lines_lo2_end /* handle trailing longwords */
-
- /* word aligned destination (line + 6): use line bursts in the loop */
-.lines_lo6_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,(%a1)+ /* store high word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- move.l %d4,(%a1)+ /* store 1st longword */
- move.l %d5,(%a1)+ /* store 2nd longword */
- jra .lines_lo6_entry /* jump into main loop */
-
-.lines_lo6_loop:
- move.l %d6,%d2 /* move last 2 longwords of old line away */
- move.l %d7,%d3
- movem.l (%a0),%d4-%d7 /* load line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,%d3 /* combine 1st high word with old low word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- movem.l %d2-%d5,(%a1) /* store line */
- add.l %d0,%a1
-.lines_lo6_entry:
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo6_loop
-
- jra .lines_lo6_end /* handle trailing longwords */
-
- /* word aligned destination (line + 10): use line bursts in the loop */
-.lines_lo10_start:
- movem.l (%a0),%d4-%d7 /* load first line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,(%a1)+ /* store high word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- move.l %d4,(%a1)+ /* store 1st longword */
- jra .lines_lo10_entry /* jump into main loop */
-
-.lines_lo10_loop:
- move.l %d5,%d1 /* move last 3 longwords of old line away */
- move.l %d6,%d2
- move.l %d7,%d3
- movem.l (%a0),%d4-%d7 /* load line */
- add.l %d0,%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,%d3 /* combine 1st high word with old low word */
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- movem.l %d1-%d4,(%a1) /* store line */
- add.l %d0,%a1
-.lines_lo10_entry:
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_lo10_loop
-
- jra .lines_lo10_end /* handle trailing longwords */
-
-#else /* !FULLSPEED */
-
- /* word aligned destination (long + 2): use line burst reads in the loop */
-.lines_do2_start:
- cmp.l %a0,%d0 /* any leading longwords? */
- jhi .lines_do2_head_start /* yes: leading longword copy */
-
- movem.l (%a0),%d4-%d7 /* load first line */
- lea.l (16,%a0),%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,(%a1)+ /* store high word */
- jra .lines_do2_entry /* jump into main loop */
-
-.lines_do2_head_start:
- move.l (%a0)+,%d7 /* load first longword */
- swap %d7 /* swap words */
- move.w %d7,(%a1)+ /* store high word */
- cmp.l %a0,%d0 /* any full longword? */
- jls .lines_do2_loop /* no: skip head loop */
-
-.lines_do2_head_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- swap %d7 /* swap words */
- move.w %d7,%d6 /* combine high word with old low word */
- move.l %d6,(%a1)+ /* store longword */
- cmp.l %a0,%d0 /* runs %a0 up to first line bound */
- jhi .lines_do2_head_loop
-
-.lines_do2_loop:
- move.l %d7,%d3 /* move last longword of old line away */
- movem.l (%a0),%d4-%d7 /* load line */
- lea.l (16,%a0),%a0
- swap %d4 /* swap words of 1st long */
- move.w %d4,%d3 /* combine 1st high word with old low word */
- move.l %d3,(%a1)+ /* store 1st longword */
-.lines_do2_entry:
- swap %d5 /* swap words of 2nd long */
- move.w %d5,%d4 /* combine 2nd high word with 1st low word */
- move.l %d4,(%a1)+ /* store 2nd longword */
- swap %d6 /* swap words of 3rd long */
- move.w %d6,%d5 /* combine 3rd high word with 2nd low word */
- move.l %d5,(%a1)+ /* store 3rd longword */
- swap %d7 /* swap words of 4th long */
- move.w %d7,%d6 /* combine 4th high word with 3rd low word */
- move.l %d6,(%a1)+ /* store 4th longword */
- cmp.l %a0,%a2 /* runs %a0 up to last line bound */
- jhi .lines_do2_loop
-
-.lines_do2_end:
- lea.l (12,%a2),%a2 /* readjust end address for doing longwords */
- cmp.l %a0,%a2 /* any trailing longwords? */
- jls .lines_do2_tail_end /* no: skip tail loop */
-
-.lines_do2_tail_loop:
- move.l %d7,%d6 /* move old longword away */
- move.l (%a0)+,%d7 /* load new longword */
- swap %d7 /* swap words */
- move.w %d7,%d6 /* combine high word with old low word */
- move.l %d6,(%a1)+ /* store longword */
- cmp.l %a0,%a2 /* runs %a0 up to last long bound */
- jhi .lines_do2_tail_loop
-
-.lines_do2_tail_end:
- swap %d7 /* undo swap */
- move.w %d7,(%a1)+ /* store last word */
- /* jra .lines_end implicit */
-
-#endif /* !FULLSPEED */
-
-.lines_end:
- addq.l #3,%a2 /* readjust end address */
- move.l %a2,%d1 /* end address in %d1 again */
- movem.l (%sp),%d2-%d7/%a2 /* restore registers */
- lea.l (28,%sp),%sp
- jra .bytes2_start /* jump to trailing byte loop */
-
-.long_start:
- subq.l #3,%d1 /* adjust end address for doing 4 bytes/ pass */
-
- /* longword copy loop - no lines */
-.long_loop:
- move.l (%a0)+,(%a1)+ /* copy longword (write can be unaligned) */
- cmp.l %a0,%d1 /* runs %a0 up to last long bound */
- jhi .long_loop
-
- addq.l #3,%d1 /* readjust end address */
- cmp.l %a0,%d1 /* any bytes left? */
- jls .bytes2_end /* no: skip trailing byte loop */
-
- /* trailing byte loop */
-.bytes2_loop:
- move.b (%a0)+,(%a1)+ /* copy byte */
-.bytes2_start:
- cmp.l %a0,%d1 /* runs %a0 up to end address */
- jhi .bytes2_loop
-
-.bytes2_end:
- move.l (4,%sp),%d0 /* return destination */
- rts
-
-.end:
- .size memcpy,.end-memcpy