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| author | Martin Liska <mliska@suse.cz> | 2016-02-22 15:14:51 +0100 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-02-22 14:14:51 +0000 |
| commit | f91d04e77d33e9f09758b6e5cb69a7d5555a3e39 (patch) | |
| tree | 1d2d1f5ec203cf55ce55834f79bf5d62393d0aab /gcc/hsa-gen.c | |
| parent | f88d45dc171e59e120817912115550b943c30b22 (diff) | |
| download | gcc-f91d04e77d33e9f09758b6e5cb69a7d5555a3e39.zip gcc-f91d04e77d33e9f09758b6e5cb69a7d5555a3e39.tar.gz gcc-f91d04e77d33e9f09758b6e5cb69a7d5555a3e39.tar.bz2 | |
HSA: fix emission of clrsb{l,ll} builtins
* hsa-gen.c (gen_hsa_clrsb): In case of zero value,
return bitsize - 1 as the return value.
From-SVN: r233602
Diffstat (limited to 'gcc/hsa-gen.c')
| -rw-r--r-- | gcc/hsa-gen.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/hsa-gen.c b/gcc/hsa-gen.c index 768c2cf..28e8b6f 100644 --- a/gcc/hsa-gen.c +++ b/gcc/hsa-gen.c @@ -4055,7 +4055,9 @@ gen_hsa_clrsb (gcall *call, hsa_bb *hbb) hsa_op_with_type *arg = hsa_reg_or_immed_for_gimple_op (rhs1, hbb); BrigType16_t bittype = hsa_bittype_for_type (arg->m_type); unsigned bitsize = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (rhs1))); - gcc_checking_assert (bitsize >= 32); + + /* FIRSTBIT instruction is defined just for 32 and 64-bits wide integers. */ + gcc_checking_assert (bitsize == 32 || bitsize == 64); /* Set true to MOST_SIG if the most significant bit is set to one. */ hsa_op_immed *c = new hsa_op_immed (1ul << (bitsize - 1), @@ -4098,9 +4100,10 @@ gen_hsa_clrsb (gcall *call, hsa_bb *hbb) new hsa_op_immed (0, arg->m_type)); hbb->append_insn (cmp); - /* Return the number of leading bits, or 31 if the input value is zero. */ + /* Return the number of leading bits, + or (bitsize - 1) if the input value is zero. */ cmov = new hsa_insn_basic (4, BRIG_OPCODE_CMOV, BRIG_TYPE_B32, NULL, is_zero, - new hsa_op_immed (31, BRIG_TYPE_U32), + new hsa_op_immed (bitsize - 1, BRIG_TYPE_U32), leading_bits->get_in_type (BRIG_TYPE_B32, hbb)); hbb->append_insn (cmov); cmov->set_output_in_type (dest, 0, hbb); |