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arm.c (arm_gen_constant): Move movw support ....

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2011-04-20  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config/arm/arm.c (arm_gen_constant): Move movw support ....
	(const_ok_for_op): ... to here.

From-SVN: r172777
This commit is contained in:
Andrew Stubbs 2011-04-20 16:33:48 +00:00 committed by Andrew Stubbs
parent 583722ee58
commit bc2c1a606a
2 changed files with 13 additions and 12 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-04-20 Andrew Stubbs <ams@codesourcery.com>
* config/arm/arm.c (arm_gen_constant): Move movw support ....
(const_ok_for_op): ... to here.
2011-04-20 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_binary_loc): Add handling for

20
gcc/config/arm/arm.c
View File

@ -2307,6 +2307,13 @@ const_ok_for_op (HOST_WIDE_INT i, enum rtx_code code)
switch (code)
{
case SET:
/* See if we can use movw. */
if (arm_arch_thumb2 && (i & 0xffff0000) == 0)
return 1;
else
return 0;
case PLUS:
case COMPARE:
case EQ:
@ -2663,9 +2670,7 @@ arm_gen_constant (enum rtx_code code, enum machine_mode mode, rtx cond,
}
/* If we can do it in one insn get out quickly. */
if (const_ok_for_arm (val)
|| (can_negate_initial && const_ok_for_arm (-val))
|| (can_invert && const_ok_for_arm (~val)))
if (const_ok_for_op (val, code))
{
if (generate)
emit_constant_insn (cond,
@ -2718,15 +2723,6 @@ arm_gen_constant (enum rtx_code code, enum machine_mode mode, rtx cond,
switch (code)
{
case SET:
/* See if we can use movw. */
if (arm_arch_thumb2 && (remainder & 0xffff0000) == 0)
{
if (generate)
emit_constant_insn (cond, gen_rtx_SET (VOIDmode, target,
GEN_INT (val)));
return 1;
}
/* See if we can do this by sign_extending a constant that is known
to be negative. This is a good, way of doing it, since the shift
may well merge into a subsequent insn. */