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avr.c (out_shift_with_cnt): Genetare a more optimal shift cycle for unknown shift count.

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* config/avr/avr.c (out_shift_with_cnt): Genetare a more optimal
	shift cycle for unknown shift count. Also generates dec + brpl.
	(ashlqi3_out): Don't generate dec + brpl which now generates by
	`out_shift_with_cnt'.
	(ashlhi3_out): Likewise.
	(ashlsi3_out): Likewise.
	(ashrqi3_out): Likewise.
	(ashrhi3_out): Likewise.
	(ashrsi3_out): Likewise.
	(lshrqi3_out): Likewise.
	(lshrhi3_out): Likewise.
	(lshrsi3_out): Likewise.

From-SVN: r33700
This commit is contained in:
Denis Chertykov 2000-05-05 08:00:51 +04:00
parent 6462c441e1
commit 0db7ad3a43
2 changed files with 43 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
gcc/ChangeLog
View File

@ -1,3 +1,18 @@
Fri May 5 07:43:50 2000 Denis Chertykov <denisc@overta.ru>
* config/avr/avr.c (out_shift_with_cnt): Genetare a more optimal
shift cycle for unknown shift count. Also generates dec + brpl.
(ashlqi3_out): Don't generate dec + brpl which now generates by
`out_shift_with_cnt'.
(ashlhi3_out): Likewise.
(ashlsi3_out): Likewise.
(ashrqi3_out): Likewise.
(ashrhi3_out): Likewise.
(ashrsi3_out): Likewise.
(lshrqi3_out): Likewise.
(lshrhi3_out): Likewise.
(lshrsi3_out): Likewise.
2000-05-04 Mark Elbrecht <snowball3@bigfoot.com>
* gcc.c (free_split_directories): Correct typo in explanation

74
gcc/config/avr/avr.c
View File

@ -2028,8 +2028,9 @@ out_shift_with_cnt (template,insn,operands,len)
int *len;
{
rtx op[10];
int l_hi=0;
char str[300];
int second_label = 1;
op[0] = operands[0];
op[1] = operands[1];
op[2] = operands[2];
@ -2042,57 +2043,54 @@ out_shift_with_cnt (template,insn,operands,len)
++*len;
else
strcat (str, "ldi %3,lo8(%2)");
second_label = 0;
}
else if (GET_CODE (operands[2]) == MEM)
{
int mov_len;
rtx op_mov[10];
l_hi = 1;
if (len)
*len = 2;
op[3] = op_mov[0] = tmp_reg_rtx;
op_mov[1] = op[2];
if (!len)
{
output_asm_insn (out_movqi_r_mr (insn, op_mov, NULL), op_mov);
strcat (str,(AS2 (or,%3,%3) CR_TAB
AS1 (breq,L_hi%=)));
strcat (str, AS1 (rjmp,2f));
}
else
{
out_movqi_r_mr (insn, op_mov, &mov_len);
*len += mov_len;
*len = mov_len + 1;
}
}
else if (register_operand (operands[2],QImode))
{
l_hi = 1;
if (len)
*len += 2;
else
strcat (str, (AS2 (or,%2,%2) CR_TAB
AS1 (breq,L_hi%=)));
if (reg_unused_after (insn, operands[2]))
{
op[3] = op[2];
}
else
{
op[3] = tmp_reg_rtx;
if (len)
++*len;
else
strcat (str, CR_TAB "mov %3,%2");
strcat (str, "mov %3,%2" CR_TAB);
}
if (len)
++*len;
else
strcat (str, AS1 (rjmp,2f));
}
if (!len)
{
strcat (str,"\n\t");
strcat (str,"\n1:\t");
strcat (str, template);
if (l_hi)
strcat (str, "\nL_hi%=:");
strcat (str, second_label ? "\n2:\t" : "\n\t");
strcat (str,
AS1 (dec,%3) CR_TAB
AS1 (brpl,1b));
output_asm_insn (str, op);
}
}
@ -2178,9 +2176,7 @@ ashlqi3_out (insn,operands,len)
}
if (len)
*len = 3;
out_shift_with_cnt (AS1 (lsl,%0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-6),
out_shift_with_cnt (AS1 (lsl,%0),
insn, operands, len);
return "";
}
@ -2224,9 +2220,7 @@ ashlhi3_out (insn,operands,len)
if (len)
*len = 4;
out_shift_with_cnt (AS1 (lsl,%0) CR_TAB
AS1 (rol,%B0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-8),
AS1 (rol,%B0),
insn, operands, len);
return "";
}
@ -2310,9 +2304,7 @@ ashlsi3_out (insn,operands,len)
out_shift_with_cnt (AS1 (lsl,%0) CR_TAB
AS1 (rol,%B0) CR_TAB
AS1 (rol,%C0) CR_TAB
AS1 (rol,%D0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-12),
AS1 (rol,%D0),
insn, operands, len);
return "";
}
@ -2356,9 +2348,7 @@ ashrqi3_out (insn,operands,len)
}
if (len)
*len = 3;
out_shift_with_cnt (AS1 (asr,%0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-6),
out_shift_with_cnt (AS1 (asr,%0),
insn, operands, len);
return "";
}
@ -2410,9 +2400,7 @@ ashrhi3_out (insn,operands,len)
if (len)
*len = 4;
out_shift_with_cnt (AS1 (asr,%B0) CR_TAB
AS1 (ror,%A0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-8),
AS1 (ror,%A0),
insn, operands, len);
return "";
}
@ -2511,9 +2499,7 @@ ashrsi3_out (insn,operands,len)
out_shift_with_cnt (AS1 (asr,%D0) CR_TAB
AS1 (ror,%C0) CR_TAB
AS1 (ror,%B0) CR_TAB
AS1 (ror,%A0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-12),
AS1 (ror,%A0),
insn, operands, len);
return "";
}
@ -2598,9 +2584,7 @@ lshrqi3_out (insn,operands,len)
}
if (len)
*len = 3;
out_shift_with_cnt (AS1 (lsr,%0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-6),
out_shift_with_cnt (AS1 (lsr,%0),
insn, operands, len);
return "";
}
@ -2649,9 +2633,7 @@ lshrhi3_out (insn,operands,len)
if (len)
*len = 4;
out_shift_with_cnt (AS1 (lsr,%B0) CR_TAB
AS1 (ror,%A0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-8),
AS1 (ror,%A0),
insn, operands, len);
return "";
}
@ -2733,9 +2715,7 @@ lshrsi3_out (insn,operands,len)
out_shift_with_cnt (AS1 (lsr,%D0) CR_TAB
AS1 (ror,%C0) CR_TAB
AS1 (ror,%B0) CR_TAB
AS1 (ror,%A0) CR_TAB
AS1 (dec,%3) CR_TAB
AS1 (brne,_PC_-12),
AS1 (ror,%A0),
insn, operands, len);
return "";
}