diff options
| author | Richard Henderson | 2016-12-15 20:58:17 +0100 |
|---|---|---|
| committer | Richard Henderson | 2017-01-23 18:52:40 +0100 |
| commit | 129e9cc3a1792b66bd189838d58f7a2944602a82 (patch) | |
| tree | 230f3e568a34145fa022fcbf3daf80e52f20fc90 /include/exec | |
| parent | target-hppa: Add framework and enable compilation (diff) | |
| download | qemu-129e9cc3a1792b66bd189838d58f7a2944602a82.tar.gz qemu-129e9cc3a1792b66bd189838d58f7a2944602a82.tar.xz qemu-129e9cc3a1792b66bd189838d58f7a2944602a82.zip | |
target-hppa: Add nullification framework
The HPPA cpu has a unique form of predicated execution in which
almost any instruction can set the PSW[N] (or "nullify") bit,
which suppresses execution (and even decoding) of the following
instruction. Execution of a nullified insn clears the PSW[N] bit.
This adds a generic framework for branching over nullified insns,
or for sufficiently simple insns, transforming the writeback of
the result to a conditional move. In the process, we want to be
able to represent PSW[N] as a TCG condition, which implies management
of the related tcg temps.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/exec')
0 files changed, 0 insertions, 0 deletions