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| author | Richard Henderson <rth@cygnus.com> | 2000-09-24 16:46:46 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-09-24 16:46:46 -0700 |
| commit | e1389cac8de5596ecf7729176e2410081e8ff288 (patch) | |
| tree | 590212a97e0c307b3be377afad30ae195f1ca51e /gcc | |
| parent | c06aa51eb96d2c2de44e8a14bf722c0909dce712 (diff) | |
| download | gcc-e1389cac8de5596ecf7729176e2410081e8ff288.zip gcc-e1389cac8de5596ecf7729176e2410081e8ff288.tar.gz gcc-e1389cac8de5596ecf7729176e2410081e8ff288.tar.bz2 | |
* emit-rtl.c (gen_lowpart_common): Use trunc_int_for_mode.
From-SVN: r36595
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/emit-rtl.c | 9 |
2 files changed, 6 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ee92e03..7507986 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2000-09-24 Richard Henderson <rth@cygnus.com> + + * emit-rtl.c (gen_lowpart_common): Use trunc_int_for_mode. + 2000-09-24 Mark Mitchell <mark@codesourcery.com> * c-tree.texi: Moved here from cp/ir.texi. Documented nested diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 2b90717..ac5e965 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -767,11 +767,7 @@ gen_lowpart_common (mode, x) { /* If MODE is twice the host word size, X is already the desired representation. Otherwise, if MODE is wider than a word, we can't - do this. If MODE is exactly a word, return just one CONST_INT. - If MODE is smaller than a word, clear the bits that don't belong - in our mode, unless they and our sign bit are all one. So we get - either a reasonable negative value or a reasonable unsigned value - for this mode. */ + do this. If MODE is exactly a word, return just one CONST_INT. */ if (GET_MODE_BITSIZE (mode) >= 2 * HOST_BITS_PER_WIDE_INT) return x; @@ -783,12 +779,11 @@ gen_lowpart_common (mode, x) else { /* MODE must be narrower than HOST_BITS_PER_WIDE_INT. */ - int width = GET_MODE_BITSIZE (mode); HOST_WIDE_INT val = (GET_CODE (x) == CONST_INT ? INTVAL (x) : CONST_DOUBLE_LOW (x)); /* Sign extend to HOST_WIDE_INT. */ - val = val << (HOST_BITS_PER_WIDE_INT - width) >> (HOST_BITS_PER_WIDE_INT - width); + val = trunc_int_for_mode (val, mode); return (GET_CODE (x) == CONST_INT && INTVAL (x) == val ? x : GEN_INT (val)); |