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h8300.c (shift_alg_qi): Use rotations when doing 6-bit logical shifts on H8/S. 

* config/h8300/h8300.c (shift_alg_qi): Use rotations when
	doing 6-bit logical shifts on H8/S.
	(shift_alg_qi): Use special code for 21-bit shifts on H8/S.
	(get_shift_alg): Generate special code for 21-bit shifts on
	H8/S.

From-SVN: r46961
This commit is contained in:
Kazu Hirata 2001-11-12 18:20:59 +00:00 committed by Kazu Hirata
parent abfc1ef607
commit e0f19bd096
2 changed files with 14 additions and 6 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2001-11-12 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.c (shift_alg_qi): Use rotations when
doing 6-bit logical shifts on H8/S.
(shift_alg_qi): Use special code for 21-bit shifts on H8/S.
(get_shift_alg): Generate special code for 21-bit shifts on
H8/S.
2001-11-12 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.c (get_shift_alg): Remove a redundant

12
gcc/config/h8300/h8300.c
View File

@ -2183,8 +2183,8 @@ static const enum shift_alg shift_alg_qi[3][3][8] = {
{
/* TARGET_H8300S */
/* 0 1 2 3 4 5 6 7 */
{ INL, INL, INL, INL, INL, INL, INL, ROT }, /* SHIFT_ASHIFT */
{ INL, INL, INL, INL, INL, INL, INL, ROT }, /* SHIFT_LSHIFTRT */
{ INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_ASHIFT */
{ INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_LSHIFTRT */
{ INL, INL, INL, INL, INL, INL, INL, SPC } /* SHIFT_ASHIFTRT */
}
};
@ -2272,15 +2272,15 @@ static const enum shift_alg shift_alg_si[3][3][32] = {
/* 24 25 26 27 28 29 30 31 */
{ INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
SPC, LOP, LOP, LOP, ROT, ROT, ROT, ROT }, /* SHIFT_ASHIFT */
{ INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
SPC, LOP, LOP, LOP, ROT, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */
{ INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */
}
};
@ -2516,7 +2516,7 @@ get_shift_alg (shift_type, shift_mode, count, info)
}
else if ((TARGET_H8300 && count == 16)
|| (TARGET_H8300H && 16 <= count && count <= 19)
|| (TARGET_H8300S && 16 <= count && count <= 20))
|| (TARGET_H8300S && 16 <= count && count <= 21))
{
info->remainder = count - 16;