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h8300.c (output_logical_op): Optimize or.l when ORing with 0xffff??00 with the highest bit of the ?? part set.

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* config/h8300/h8300.c (output_logical_op): Optimize or.l when
	ORing with 0xffff??00 with the highest bit of the ?? part set.
	(compute_logical_op_length): Update.
	(compute_logical_op_cc): Likewise.

From-SVN: r63131
This commit is contained in:
Kazu Hirata 2003-02-19 21:21:21 +00:00 committed by Kazu Hirata
parent 6d9cc15b64
commit 472f272337
2 changed files with 40 additions and 3 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2003-02-19 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (output_logical_op): Optimize or.l when
ORing with 0xffff??00 with the highest bit of the ?? part set.
(compute_logical_op_length): Update.
(compute_logical_op_cc): Likewise.
2003-02-19 Josef Zlomek <zlomekj@suse.cz>
* bb-reorder.c (find_traces_1_round): Fixed condition for small

36
gcc/config/h8300/h8300.c
View File

@ -2206,7 +2206,9 @@ output_logical_op (mode, operands)
using multiple insns. */
if ((TARGET_H8300H || TARGET_H8300S)
&& w0 != 0 && w1 != 0
&& !(lower_half_easy_p && upper_half_easy_p))
&& !(lower_half_easy_p && upper_half_easy_p)
&& !(code == IOR && w1 == 0xffff
&& (w0 & 0x8000) != 0 && lower_half_easy_p))
{
sprintf (insn_buf, "%s.l\t%%S2,%%S0", opname);
output_asm_insn (insn_buf, operands);
@ -2250,6 +2252,13 @@ output_logical_op (mode, operands)
output_asm_insn ((code == AND)
? "sub.w\t%e0,%e0" : "not.w\t%e0",
operands);
else if ((TARGET_H8300H || TARGET_H8300S)
&& code == IOR
&& w1 == 0xffff
&& (w0 & 0x8000) != 0)
{
output_asm_insn ("exts.l\t%S0", operands);
}
else if ((TARGET_H8300H || TARGET_H8300S)
&& code == AND
&& w1 == 0xff00)
@ -2354,7 +2363,9 @@ compute_logical_op_length (mode, operands)
using multiple insns. */
if ((TARGET_H8300H || TARGET_H8300S)
&& w0 != 0 && w1 != 0
&& !(lower_half_easy_p && upper_half_easy_p))
&& !(lower_half_easy_p && upper_half_easy_p)
&& !(code == IOR && w1 == 0xffff
&& (w0 & 0x8000) != 0 && lower_half_easy_p))
{
if (REG_P (operands[2]))
length += 4;
@ -2394,6 +2405,13 @@ compute_logical_op_length (mode, operands)
{
length += 2;
}
else if ((TARGET_H8300H || TARGET_H8300S)
&& code == IOR
&& w1 == 0xffff
&& (w0 & 0x8000) != 0)
{
length += 2;
}
else if ((TARGET_H8300H || TARGET_H8300S)
&& code == AND
&& w1 == 0xff00)
@ -2475,10 +2493,22 @@ compute_logical_op_cc (mode, operands)
using multiple insns. */
if ((TARGET_H8300H || TARGET_H8300S)
&& w0 != 0 && w1 != 0
&& !(lower_half_easy_p && upper_half_easy_p))
&& !(lower_half_easy_p && upper_half_easy_p)
&& !(code == IOR && w1 == 0xffff
&& (w0 & 0x8000) != 0 && lower_half_easy_p))
{
cc = CC_SET_ZNV;
}
else
{
if ((TARGET_H8300H || TARGET_H8300S)
&& code == IOR
&& w1 == 0xffff
&& (w0 & 0x8000) != 0)
{
cc = CC_SET_ZNV;
}
}
break;
default:
abort ();