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shrink the code size of stage1.

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okuji 2000-04-30 05:42:41 +00:00
parent 2b8c514095
commit d08bfbd094
3 changed files with 13 additions and 5 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2000-04-30 OKUJI Yoshinori <okuji@gnu.org>
* stage1/stage1.S (message): Use lodsb instead of incw and movb.
From Andrew Clausen <clausen@gnu.org>.
* stage1/stage1.S (copy_buffer): Set %cx to 0x100 and use movsw
instead of movsb, since it is guaranteed that the region is
properly aligned.
2000-04-29 OKUJI Yoshinori <okuji@gnu.org> 2000-04-29 OKUJI Yoshinori <okuji@gnu.org>
* stage2/builtins.c (setup_func): Use SECTOR_BITS instead of * stage2/builtins.c (setup_func): Use SECTOR_BITS instead of

1
THANKS
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@ -7,6 +7,7 @@ time and energy in helping to track down bugs, add new features, and
generally assist in the GRUB maintainership process: generally assist in the GRUB maintainership process:
Alexander K. Hudek <alexhudek@home.com> Alexander K. Hudek <alexhudek@home.com>
Andrew Clausen <clausen@gnu.org>
Bradford Hovinen <hovinen@redrose.net> Bradford Hovinen <hovinen@redrose.net>
Brian Brunswick <brian@skarpsey.demon.co.uk> Brian Brunswick <brian@skarpsey.demon.co.uk>
Bryan Ford <baford@cs.utah.edu> Bryan Ford <baford@cs.utah.edu>

8
stage1/stage1.S
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@ -348,7 +348,7 @@ copy_buffer:
pushw %ds pushw %ds
pushw %si pushw %si
movw $0x200, %cx movw $0x100, %cx
movw %bx, %ds movw %bx, %ds
xorw %si, %si xorw %si, %si
xorw %di, %di xorw %di, %di
@ -356,7 +356,7 @@ copy_buffer:
cld cld
rep rep
movsb movsw
popw %si popw %si
popw %ds popw %ds
@ -414,10 +414,8 @@ general_error_string: .string " Error"
movw $0x0001, %bx movw $0x0001, %bx
movb $0xe, %ah movb $0xe, %ah
int $0x10 /* display a byte */ int $0x10 /* display a byte */
incw %si
message: message:
movb (%si), %al lodsb
cmpb $0, %al cmpb $0, %al
jne 1b /* if not end of string, jmp to display */ jne 1b /* if not end of string, jmp to display */
ret ret