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author | Alexander Graf <agraf@suse.de> | 2013-12-17 19:42:34 +0000 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2013-12-17 20:12:51 +0000 |
commit | 8220e911c240df5b4b2a1473f0ba9feddc154c45 (patch) | |
tree | c21507a1d16a74f71517c044097bacd5715d38b6 /target-arm/helper-a64.c | |
parent | e801de93d0155c0c14d6b4dea1b3577ca36e214b (diff) | |
download | hqemu-8220e911c240df5b4b2a1473f0ba9feddc154c45.zip hqemu-8220e911c240df5b4b2a1473f0ba9feddc154c45.tar.gz |
target-arm: A64: add support for 2-src data processing and DIV
This patch adds support for decoding 2-src data processing insns,
and the first users, UDIV and SDIV.
Signed-off-by: Alexander Graf <agraf@suse.de>
[claudio: adapted to new decoder adding the 2-src decoding level,
always zero-extend result in 32bit mode]
Signed-off-by: Claudio Fontana <claudio.fontana@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-arm/helper-a64.c')
-rw-r--r-- | target-arm/helper-a64.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index adb8428..abb98c0 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -23,3 +23,24 @@ #include "qemu/host-utils.h" #include "sysemu/sysemu.h" #include "qemu/bitops.h" + +/* C2.4.7 Multiply and divide */ +/* special cases for 0 and LLONG_MIN are mandated by the standard */ +uint64_t HELPER(udiv64)(uint64_t num, uint64_t den) +{ + if (den == 0) { + return 0; + } + return num / den; +} + +int64_t HELPER(sdiv64)(int64_t num, int64_t den) +{ + if (den == 0) { + return 0; + } + if (num == LLONG_MIN && den == -1) { + return LLONG_MIN; + } + return num / den; +} |