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rs6000.c (rs6000_emit_set_long_const): Shorten sequence for DImode constants >= 0x80000000UL <= 0xFFFFFFFFUL by 1 insn.

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* config/rs6000/rs6000.c (rs6000_emit_set_long_const): Shorten
	sequence for DImode constants >= 0x80000000UL <= 0xFFFFFFFFUL by
	1 insn.
	(num_insns_constant_wide): Adjust for that change.

From-SVN: r155770
This commit is contained in:
Jakub Jelinek 2010-01-09 18:56:12 +01:00 committed by Jakub Jelinek
parent f2ff577a33
commit 7234a61566
2 changed files with 23 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2010-01-09 Jakub Jelinek <jakub@redhat.com>
* config/rs6000/rs6000.c (rs6000_emit_set_long_const): Shorten
sequence for DImode constants >= 0x80000000UL <= 0xFFFFFFFFUL by
1 insn.
(num_insns_constant_wide): Adjust for that change.
2010-01-09 Alexandre Oliva <aoliva@redhat.com>
PR debug/42631

16
gcc/config/rs6000/rs6000.c
View File

@ -3794,6 +3794,8 @@ num_insns_constant_wide (HOST_WIDE_INT value)
if (low == 0)
return num_insns_constant_wide (high) + 1;
else if (high == 0)
return num_insns_constant_wide (low) + 1;
else
return (num_insns_constant_wide (high)
+ num_insns_constant_wide (low) + 1);
@ -6143,6 +6145,20 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c1, HOST_WIDE_INT c2)
gen_rtx_IOR (DImode, copy_rtx (dest),
GEN_INT (ud1)));
}
else if (ud3 == 0 && ud4 == 0)
{
gcc_assert (ud2 & 0x8000);
emit_move_insn (dest, GEN_INT (((ud2 << 16) ^ 0x80000000)
- 0x80000000));
if (ud1 != 0)
emit_move_insn (copy_rtx (dest),
gen_rtx_IOR (DImode, copy_rtx (dest),
GEN_INT (ud1)));
emit_move_insn (copy_rtx (dest),
gen_rtx_ZERO_EXTEND (DImode,
gen_lowpart (SImode,
copy_rtx (dest))));
}
else if ((ud4 == 0xffff && (ud3 & 0x8000))
|| (ud4 == 0 && ! (ud3 & 0x8000)))
{