diff options
| author | Sergey Sorokin <afarallax@yandex.ru> | 2016-06-23 21:16:46 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-07-05 20:50:13 -0700 |
| commit | 1f00b27f17518a1bcb4cedca49eaec96a4d560bd (patch) | |
| tree | 90abe3fc60c60ce9ff0aa5c46a87c5589ff55229 /tcg/tcg.c | |
| parent | 59d7c14eeff8d2ad7f61aed86ce5a176113bc153 (diff) | |
tcg: Improve the alignment check infrastructure
Some architectures (e.g. ARMv8) need the address which is aligned
to a size more than the size of the memory access.
To support such check it's enough the current costless alignment
check implementation in QEMU, but we need to support
an alignment size specifying.
Signed-off-by: Sergey Sorokin <afarallax@yandex.ru>
Message-Id: <1466705806-679898-1-git-send-email-afarallax@yandex.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
[rth: Assert in tcg_canonicalize_memop. Leave get_alignment_bits
available for, though unused by, user-mode. Retain logging difference
based on ALIGNED_ONLY.]
Diffstat (limited to 'tcg/tcg.c')
| -rw-r--r-- | tcg/tcg.c | 26 |
1 files changed, 18 insertions, 8 deletions
@@ -999,6 +999,22 @@ static const char * const ldst_name[] = [MO_BEQ] = "beq", }; +static const char * const alignment_name[(MO_AMASK >> MO_ASHIFT) + 1] = { +#ifdef ALIGNED_ONLY + [MO_UNALN >> MO_ASHIFT] = "un+", + [MO_ALIGN >> MO_ASHIFT] = "", +#else + [MO_UNALN >> MO_ASHIFT] = "", + [MO_ALIGN >> MO_ASHIFT] = "al+", +#endif + [MO_ALIGN_2 >> MO_ASHIFT] = "al2+", + [MO_ALIGN_4 >> MO_ASHIFT] = "al4+", + [MO_ALIGN_8 >> MO_ASHIFT] = "al8+", + [MO_ALIGN_16 >> MO_ASHIFT] = "al16+", + [MO_ALIGN_32 >> MO_ASHIFT] = "al32+", + [MO_ALIGN_64 >> MO_ASHIFT] = "al64+", +}; + void tcg_dump_ops(TCGContext *s) { char buf[128]; @@ -1100,14 +1116,8 @@ void tcg_dump_ops(TCGContext *s) if (op & ~(MO_AMASK | MO_BSWAP | MO_SSIZE)) { qemu_log(",$0x%x,%u", op, ix); } else { - const char *s_al = "", *s_op; - if (op & MO_AMASK) { - if ((op & MO_AMASK) == MO_ALIGN) { - s_al = "al+"; - } else { - s_al = "un+"; - } - } + const char *s_al, *s_op; + s_al = alignment_name[(op & MO_AMASK) >> MO_ASHIFT]; s_op = ldst_name[op & (MO_BSWAP | MO_SSIZE)]; qemu_log(",%s%s,%u", s_al, s_op, ix); } |