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riscv-gcc-1
Commit 1e5bdc40 by Kazu Hirata Committed by Kazu Hirata
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h8300.c (shift_alg_si): Optimize ashift:HI and lshiftrt:SI by 28, 29, and 30… 

h8300.c (shift_alg_si): Optimize ashift:HI and lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.

	* config/h8300/h8300.c (shift_alg_si): Optimize ashift:HI and
	lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.
	(get_shift_alg): Return optimal assembly instructions for the
	shifts mentioned above.

From-SVN: r59859
parent d8f2e87b
Showing with 83 additions and 4 deletions
gcc/ChangeLog
2002-12-05 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (shift_alg_si): Optimize ashift:HI and
lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.
(get_shift_alg): Return optimal assembly instructions for the
shifts mentioned above.
2002-12-04 Kazu Hirata <kazu@cs.umass.edu> 2002-12-04 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (h8300_init_once): Do not use loop to * config/h8300/h8300.c (h8300_init_once): Do not use loop to
......
gcc/config/h8300/h8300.c
...@@ -242,11 +242,11 @@ static enum shift_alg shift_alg_si[3][3][32] = { ...@@ -242,11 +242,11 @@ static enum shift_alg shift_alg_si[3][3][32] = {
{ INL, INL, INL, INL, INL, LOP, LOP, LOP, { INL, INL, INL, INL, INL, LOP, LOP, LOP,
SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC, SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC,
SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT */ SPC, LOP, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFT */
{ INL, INL, INL, INL, INL, LOP, LOP, LOP, { INL, INL, INL, INL, INL, LOP, LOP, LOP,
SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC, SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC,
SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */ SPC, LOP, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_LSHIFTRT */
{ INL, INL, INL, INL, INL, LOP, LOP, LOP, { INL, INL, INL, INL, INL, LOP, LOP, LOP,
SPC, LOP, LOP, LOP, LOP, LOP, LOP, LOP, SPC, LOP, LOP, LOP, LOP, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
...@@ -261,11 +261,11 @@ static enum shift_alg shift_alg_si[3][3][32] = { ...@@ -261,11 +261,11 @@ static enum shift_alg shift_alg_si[3][3][32] = {
{ INL, INL, INL, INL, INL, INL, INL, INL, { INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, SPC, INL, INL, INL, LOP, LOP, LOP, LOP, SPC,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT */ SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFT */
{ INL, INL, INL, INL, INL, INL, INL, INL, { INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, SPC, INL, INL, INL, LOP, LOP, LOP, LOP, SPC,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */ SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_LSHIFTRT */
{ INL, INL, INL, INL, INL, INL, INL, INL, { INL, INL, INL, INL, INL, INL, INL, INL,
INL, INL, INL, LOP, LOP, LOP, LOP, LOP, INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
...@@ -2725,6 +2725,78 @@ get_shift_alg (shift_type, shift_mode, count, info) ...@@ -2725,6 +2725,78 @@ get_shift_alg (shift_type, shift_mode, count, info)
goto end; goto end;
} }
} }
else if (!TARGET_H8300 && count == 28)
{
switch (shift_type)
{
case SHIFT_ASHIFT:
if (TARGET_H8300H)
info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
else
info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\trotr.l\t#2,%S0\n\tsub.w\t%f0,%f0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_LSHIFTRT:
if (TARGET_H8300H)
info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
else
info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\trotl.l\t#2,%S0\n\tsub.w\t%e0,%e0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_ASHIFTRT:
abort ();
}
}
else if (!TARGET_H8300 && count == 29)
{
switch (shift_type)
{
case SHIFT_ASHIFT:
if (TARGET_H8300H)
info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
else
info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_LSHIFTRT:
if (TARGET_H8300H)
info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
else
info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_ASHIFTRT:
abort ();
}
}
else if (!TARGET_H8300 && count == 30)
{
switch (shift_type)
{
case SHIFT_ASHIFT:
if (TARGET_H8300H)
info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
else
info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\tsub.w\t%f0,%f0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_LSHIFTRT:
if (TARGET_H8300H)
info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
else
info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\tsub.w\t%e0,%e0";
info->shift1 = "";
info->shift2 = "";
goto end;
case SHIFT_ASHIFTRT:
abort ();
}
}
else if (count == 31) else if (count == 31)
{ {
if (TARGET_H8300) if (TARGET_H8300)
......
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