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riscv-gcc-1
Commit 96eaf358 by Kazu Hirata Committed by Kazu Hirata
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* config/h8300/h8300.c (get_shift_alg): Remove redundant code. 

From-SVN: r46947
parent e9716dc5
Showing with 59 additions and 74 deletions
gcc/ChangeLog
2001-11-12 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.c (get_shift_alg): Remove redundant code.
2001-11-12 Jakub Jelinek <jakub@redhat.com> 2001-11-12 Jakub Jelinek <jakub@redhat.com>
* dbxout.c (dbxout_symbol_location): Avoid emitting invalid register * dbxout.c (dbxout_symbol_location): Avoid emitting invalid register
......
gcc/config/h8300/h8300.c
...@@ -2347,34 +2347,67 @@ get_shift_alg (shift_type, shift_mode, count, info) ...@@ -2347,34 +2347,67 @@ get_shift_alg (shift_type, shift_mode, count, info)
else else
cpu = 2; cpu = 2;
/* In case we end up with SHIFT_SPECIAL, initialize REMAINDER to 0. */ /* Find the shift algorithm. */
info->remainder = 0;
/* Assume either SHIFT_LOOP or SHIFT_INLINE.
It is up to the caller to know that looping clobbers cc. */
info->shift1 = shift_one[cpu_type][shift_type][shift_mode].assembler;
info->shift2 = shift_two[shift_type][shift_mode].assembler;
info->cc_valid_p = shift_one[cpu_type][shift_type][shift_mode].cc_valid;
/* Now look for cases we want to optimize. */
switch (shift_mode) switch (shift_mode)
{ {
case QIshift: case QIshift:
if (GET_MODE_BITSIZE (QImode) <= count) if (GET_MODE_BITSIZE (QImode) <= count)
goto return_shift_loop; info->alg = SHIFT_LOOP;
else
info->alg = shift_alg_qi[cpu][shift_type][count];
break;
switch (shift_alg_qi[cpu][shift_type][count]) case HIshift:
{ if (GET_MODE_BITSIZE (HImode) <= count)
case SHIFT_INLINE: info->alg = SHIFT_LOOP;
goto return_shift_inline; else
case SHIFT_LOOP: info->alg = shift_alg_hi[cpu][shift_type][count];
goto return_shift_loop; break;
case SHIFT_ROT_AND:
goto return_shift_rot_and; case SIshift:
case SHIFT_SPECIAL: if (GET_MODE_BITSIZE (SImode) <= count)
; info->alg = SHIFT_LOOP;
} else
info->alg = shift_alg_si[cpu][shift_type][count];
break;
default:
abort ();
}
/* Fill in INFO. Return unless we have SHIFT_SPECIAL. */
switch (info->alg)
{
case SHIFT_INLINE:
info->remainder = count;
/* Fall through. */
case SHIFT_LOOP:
/* It is up to the caller to know that looping clobbers cc. */
info->shift1 = shift_one[cpu_type][shift_type][shift_mode].assembler;
info->shift2 = shift_two[shift_type][shift_mode].assembler;
info->cc_valid_p = shift_one[cpu_type][shift_type][shift_mode].cc_valid;
goto end;
case SHIFT_ROT_AND:
info->shift1 = rotate_one[cpu_type][shift_type][shift_mode];
info->shift2 = rotate_two[shift_type][shift_mode];
info->cc_valid_p = 0;
goto end;
case SHIFT_SPECIAL:
/* REMAINDER is 0 for most cases, so initialize it to 0. */
info->remainder = 0;
info->shift1 = shift_one[cpu_type][shift_type][shift_mode].assembler;
info->shift2 = shift_two[shift_type][shift_mode].assembler;
info->cc_valid_p = 0;
break;
}
/* Here we only deal with SHIFT_SPECIAL. */
switch (shift_mode)
{
case QIshift:
/* For ASHIFTRT by 7 bits, the sign bit is simply replicated /* For ASHIFTRT by 7 bits, the sign bit is simply replicated
through the entire value. */ through the entire value. */
if (shift_type == SHIFT_ASHIFTRT && count == 7) if (shift_type == SHIFT_ASHIFTRT && count == 7)
...@@ -2385,21 +2418,6 @@ get_shift_alg (shift_type, shift_mode, count, info) ...@@ -2385,21 +2418,6 @@ get_shift_alg (shift_type, shift_mode, count, info)
abort (); abort ();
case HIshift: case HIshift:
if (GET_MODE_BITSIZE (HImode) <= count)
goto return_shift_loop;
switch (shift_alg_hi[cpu][shift_type][count])
{
case SHIFT_INLINE:
goto return_shift_inline;
case SHIFT_LOOP:
goto return_shift_loop;
case SHIFT_ROT_AND:
goto return_shift_rot_and;
case SHIFT_SPECIAL:
;
}
if (count == 7) if (count == 7)
{ {
if (shift_type == SHIFT_ASHIFT && TARGET_H8300) if (shift_type == SHIFT_ASHIFT && TARGET_H8300)
...@@ -2466,22 +2484,6 @@ get_shift_alg (shift_type, shift_mode, count, info) ...@@ -2466,22 +2484,6 @@ get_shift_alg (shift_type, shift_mode, count, info)
abort (); abort ();
case SIshift: case SIshift:
if (GET_MODE_BITSIZE (SImode) <= count)
goto return_shift_loop;
info->alg = shift_alg_si[cpu][shift_type][count];
switch (info->alg)
{
case SHIFT_INLINE:
goto return_shift_inline;
case SHIFT_LOOP:
goto return_shift_loop;
case SHIFT_ROT_AND:
goto return_shift_rot_and;
case SHIFT_SPECIAL:
;
}
if (count == 8 && TARGET_H8300) if (count == 8 && TARGET_H8300)
{ {
switch (shift_type) switch (shift_type)
...@@ -2583,28 +2585,7 @@ get_shift_alg (shift_type, shift_mode, count, info) ...@@ -2583,28 +2585,7 @@ get_shift_alg (shift_type, shift_mode, count, info)
abort (); abort ();
} }
return_shift_loop:
/* No fancy method is available. Just loop. */
info->alg = SHIFT_LOOP;
goto end;
return_shift_inline:
info->remainder = count;
info->alg = SHIFT_INLINE;
goto end;
return_shift_special: return_shift_special:
info->cc_valid_p = 0;
info->alg = SHIFT_SPECIAL;
goto end;
return_shift_rot_and:
info->shift1 = rotate_one[cpu_type][shift_type][shift_mode];
info->shift2 = rotate_two[shift_type][shift_mode];
info->cc_valid_p = 0;
info->alg = SHIFT_ROT_AND;
goto end;
end: end:
if (!TARGET_H8300S) if (!TARGET_H8300S)
info->shift2 = NULL; info->shift2 = NULL;
......
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