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| author | John Carr <jfc@mit.edu> | 1998-04-22 12:57:04 +0000 |
|---|---|---|
| committer | John Carr <jfc@gcc.gnu.org> | 1998-04-22 12:57:04 +0000 |
| commit | 27eef9cececccd37254c9106b02fd965369650eb (patch) | |
| tree | 37289efcae710e9b3892cb4a63490d76a9c2b2c7 /gcc/final.c | |
| parent | 3f4ea1dee8bf07bf77f7b7417fe77652be421afc (diff) | |
| download | gcc-27eef9cececccd37254c9106b02fd965369650eb.zip gcc-27eef9cececccd37254c9106b02fd965369650eb.tar.gz gcc-27eef9cececccd37254c9106b02fd965369650eb.tar.bz2 | |
emit-rtl.c (gen_highpart): The high part of a CONST_INT is not zero if...
* emit-rtl.c (gen_highpart): The high part of a CONST_INT is not zero
if HOST_BITS_PER_WIDE_INT is larger than BITS_PER_WORD.
* final.c (split_double): Sign extend both halves of a split CONST_INT.
From-SVN: r19375
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/gcc/final.c b/gcc/final.c index 038de92..393da70 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -3677,16 +3677,12 @@ split_double (value, first, second) if (HOST_BITS_PER_WIDE_INT >= (2 * BITS_PER_WORD)) { /* In this case the CONST_INT holds both target words. - Extract the bits from it into two word-sized pieces. */ + Extract the bits from it into two word-sized pieces. + Sign extend each half to HOST_WIDE_INT. */ rtx low, high; - HOST_WIDE_INT word_mask; - /* Avoid warnings for shift count >= BITS_PER_WORD. */ - int shift_count = BITS_PER_WORD - 1; - - word_mask = (HOST_WIDE_INT) 1 << shift_count; - word_mask |= word_mask - 1; - low = GEN_INT (INTVAL (value) & word_mask); - high = GEN_INT ((INTVAL (value) >> (shift_count + 1)) & word_mask); + + low = GEN_INT (INTVAL (value) << (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD) >> (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD)); + high = GEN_INT (INTVAL (value) << (HOST_BITS_PER_WIDE_INT - 2 * BITS_PER_WORD) >> (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD)); if (WORDS_BIG_ENDIAN) { *first = high; |