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| author | Richard Henderson <richard.henderson@linaro.org> | 2018-07-09 14:51:34 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-07-09 14:51:34 +0100 |
| commit | 499748d7683198a765d17b4fdf6901ab9dca920c (patch) | |
| tree | 44f8d687d5cc7dd7ed8ac565cf71f8ce8f9e6fb0 /tcg | |
| parent | 2f95a3b09aebdcb5c9152a7ac434a5d57441fe82 (diff) | |
| download | qemu-499748d7683198a765d17b4fdf6901ab9dca920c.zip qemu-499748d7683198a765d17b4fdf6901ab9dca920c.tar.gz qemu-499748d7683198a765d17b4fdf6901ab9dca920c.tar.bz2 | |
tcg: Restrict check_size_impl to multiples of the line size
Normally this is automatic in the size restrictions that are placed
on vector sizes coming from the implementation. However, for the
legitimate size tuple [oprsz=8, maxsz=32], we need to clear the final
24 bytes of the vector register. Without this check, do_dup selects
TCG_TYPE_V128 and clears only 16 bytes.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180705191929.30773-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/tcg-op-gvec.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c index 22db159..61c25f5 100644 --- a/tcg/tcg-op-gvec.c +++ b/tcg/tcg-op-gvec.c @@ -287,8 +287,11 @@ void tcg_gen_gvec_4_ptr(uint32_t dofs, uint32_t aofs, uint32_t bofs, in units of LNSZ. This limits the expansion of inline code. */ static inline bool check_size_impl(uint32_t oprsz, uint32_t lnsz) { - uint32_t lnct = oprsz / lnsz; - return lnct >= 1 && lnct <= MAX_UNROLL; + if (oprsz % lnsz == 0) { + uint32_t lnct = oprsz / lnsz; + return lnct >= 1 && lnct <= MAX_UNROLL; + } + return false; } static void expand_clr(uint32_t dofs, uint32_t maxsz); |