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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-02-25 06:51:17 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-02-25 06:51:17 -0500 |
| commit | 914c2e776d6d6ce6da61f4be9982390ef86c018b (patch) | |
| tree | 22034acc2ccf997fa14a2fe2d0b31e2273ad7551 | |
| parent | c38e6998e0e4cc2bd33bb37c39695bfd81eabab7 (diff) | |
| download | gcc-914c2e776d6d6ce6da61f4be9982390ef86c018b.zip gcc-914c2e776d6d6ce6da61f4be9982390ef86c018b.tar.gz gcc-914c2e776d6d6ce6da61f4be9982390ef86c018b.tar.bz2 | |
(low_32_bit_operand): New function.
From-SVN: r9078
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 4890134..678f21f 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -322,6 +322,23 @@ easy_fp_constant (op, mode) || (low != 0 && input_operand (low, word_mode))); } +/* Return 1 if the operand is a constant whose low-order 32 bits are + zero. */ + +int +low_32_bit_operand (op, mode) + register rtx op; + enum machine_mode mode; +{ + rtx low; + + if (GET_CODE (op) != CONST_DOUBLE && GET_CODE (op) != CONST_INT) + return 0; + + low = operand_subword (op, 1, 0, mode); + return low != 0 && GET_CODE (low) == CONST_INT && INTVAL (low) == 0; +} + /* Return 1 if the operand is either a floating-point register, a pseudo register, or memory. */ |