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emit-rtl.c (constant_subword): Also do sign extension in BITS_PER_WORD == 16 case.

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* emit-rtl.c (constant_subword): Also do sign extension in
	BITS_PER_WORD == 16 case.

From-SVN: r41545
This commit is contained in:
J"orn Rennecke 2001-04-25 16:14:24 +00:00 committed by Joern Rennecke
parent 889a80aa95
commit 73de376fa0
2 changed files with 7 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Wed Apr 25 17:09:50 2001 J"orn Rennecke <amylaar@redhat.com>
* emit-rtl.c (constant_subword): Also do sign extension in
BITS_PER_WORD == 16 case.
2001-04-25 Jason Merrill <jason_merrill@redhat.com> 2001-04-25 Jason Merrill <jason_merrill@redhat.com>
* loop.c (try_swap_copy_prop): Go back to checking insn. * loop.c (try_swap_copy_prop): Go back to checking insn.

4
gcc/emit-rtl.c
View File

@ -1369,7 +1369,7 @@ constant_subword (op, offset, mode)
val = k[offset >> 1]; val = k[offset >> 1];
if ((offset & 1) == ! WORDS_BIG_ENDIAN) if ((offset & 1) == ! WORDS_BIG_ENDIAN)
val >>= 16; val >>= 16;
val &= 0xffff; val = ((val & 0xffff) ^ 0x8000) - 0x8000;
return GEN_INT (val); return GEN_INT (val);
} }
else else
@ -1448,7 +1448,7 @@ constant_subword (op, offset, mode)
{ {
if ((offset & 1) == ! WORDS_BIG_ENDIAN) if ((offset & 1) == ! WORDS_BIG_ENDIAN)
val >>= 16; val >>= 16;
val &= 0xffff; val = ((val & 0xffff) ^ 0x8000) - 0x8000;
} }
return GEN_INT (val); return GEN_INT (val);