diff options
| author | Dhananjay R. Deshpande <dhananjayd@kpit.com> | 2002-08-29 15:26:52 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2002-08-29 15:26:52 -0600 |
| commit | 5e98fba26b73d4a6aad24f34c25e533a10f16b36 (patch) | |
| tree | 26531952318d352240afaa6d93b9b6c1552d68de | |
| parent | 4385234278e3b3d29b88672b3567829448b4c945 (diff) | |
| download | gcc-5e98fba26b73d4a6aad24f34c25e533a10f16b36.zip gcc-5e98fba26b73d4a6aad24f34c25e533a10f16b36.tar.gz gcc-5e98fba26b73d4a6aad24f34c25e533a10f16b36.tar.bz2 | |
h8300.c (shift_alg_hi): Various tweaks to improve performance of HImode shifts.
* h8300.c (shift_alg_hi): Various tweaks to improve performance
of HImode shifts.
(get_shift_alg): Corresponding changes.
From-SVN: r56665
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300.c | 42 |
2 files changed, 38 insertions, 10 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e29e98e..5fca176 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2002-08-29 "Dhananjay R. Deshpande" <dhananjayd@kpit.com> + + * h8300.c (shift_alg_hi): Various tweaks to improve performance + of HImode shifts. + (get_shift_alg): Corresponding changes. + 2002-08-29 John David Anglin <dave@hiauly1.hia.nrc.ca> * som.h (ALWAYS_STRIP_DOTDOT): Define to 1. diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c index 841c8b7..19520db 100644 --- a/gcc/config/h8300/h8300.c +++ b/gcc/config/h8300/h8300.c @@ -2213,23 +2213,23 @@ static const enum shift_alg shift_alg_hi[3][3][16] = { /* TARGET_H8300 */ /* 0 1 2 3 4 5 6 7 */ /* 8 9 10 11 12 13 14 15 */ + { INL, INL, INL, INL, INL, INL, INL, SPC, + SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFT */ { INL, INL, INL, INL, INL, LOP, LOP, SPC, - SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFT */ + SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC }, /* SHIFT_LSHIFTRT */ { INL, INL, INL, INL, INL, LOP, LOP, SPC, - SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_LSHIFTRT */ - { INL, INL, INL, INL, INL, LOP, LOP, SPC, - SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ + SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFTRT */ }, { /* TARGET_H8300H */ /* 0 1 2 3 4 5 6 7 */ /* 8 9 10 11 12 13 14 15 */ - { INL, INL, INL, INL, INL, LOP, LOP, SPC, + { INL, INL, INL, INL, INL, INL, INL, SPC, SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_ASHIFT */ - { INL, INL, INL, INL, INL, LOP, LOP, SPC, + { INL, INL, INL, INL, INL, INL, INL, SPC, SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ - { INL, INL, INL, INL, INL, LOP, LOP, SPC, - SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ + { INL, INL, INL, INL, INL, INL, INL, SPC, + SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFTRT */ }, { /* TARGET_H8300S */ @@ -2240,7 +2240,7 @@ static const enum shift_alg shift_alg_hi[3][3][16] = { { INL, INL, INL, INL, INL, INL, INL, INL, SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ { INL, INL, INL, INL, INL, INL, INL, INL, - SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ + SPC, SPC, SPC, SPC, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFTRT */ } }; @@ -2458,7 +2458,7 @@ get_shift_alg (shift_type, shift_mode, count, info) goto end; } } - else if (8 <= count && count <= 12) + else if (8 <= count && count <= 13) { info->remainder = count - 8; @@ -2484,6 +2484,28 @@ get_shift_alg (shift_type, shift_mode, count, info) goto end; } } + else if (count == 14) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300) + info->special = "mov.b\t%s0,%t0\n\trotr.b\t%t0\n\trotr.b\t%t0\n\tand.b\t#0xC0,%t0\n\tsub.b\t%s0,%s0"; + goto end; + case SHIFT_LSHIFTRT: + if (TARGET_H8300) + info->special = "mov.b\t%t0,%s0\n\trotl.b\t%s0\n\trotl.b\t%s0\n\tand.b\t#3,%s0\n\tsub.b\t%t0,%t0"; + goto end; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + info->special = "mov.b\t%t0,%s0\n\tshll.b\t%s0\n\tsubx.b\t%t0,%t0\n\tshll.b\t%s0\n\tmov.b\t%t0,%s0\n\tbst.b\t#0,%s0"; + else if (TARGET_H8300H) + info->special = "shll.b\t%t0\n\tsubx.b\t%s0,%s0\n\tshll.b\t%t0\n\trotxl.b\t%s0\n\texts.w\t%T0"; + else /* TARGET_H8300S */ + info->special = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.w\t#2,%T0\n\tshar.w\t#2,%T0\n\tshar.w\t#2,%T0"; + goto end; + } + } else if (count == 15) { switch (shift_type) |