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| author | David Hildenbrand <david@redhat.com> | 2019-02-25 21:03:18 +0100 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2019-03-04 11:49:31 +0100 |
| commit | 6d9303322ed9580ff6c61e38a427b549410464c7 (patch) | |
| tree | b5852be0aefc08d8554c5469aa76a8c357f50502 /target/s390x/cc_helper.c | |
| parent | 86b59624c4aa2a383aca7a1798740779ac8967ce (diff) | |
| download | qemu-6d9303322ed9580ff6c61e38a427b549410464c7.zip qemu-6d9303322ed9580ff6c61e38a427b549410464c7.tar.gz qemu-6d9303322ed9580ff6c61e38a427b549410464c7.tar.bz2 | |
s390x/tcg: Implement LOAD COUNT TO BLOCK BOUNDARY
Use a new CC helper to calculate the CC lazily if needed. While the
PoP mentions that "A 32-bit unsigned binary integer" is placed into the
first operand, there is no word telling that the other 32 bits (high
part) are left untouched. Maybe the other 32-bit are unpredictable.
So store 64 bit for now.
Bit magic courtesy of Richard.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190225200318.16102-8-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x/cc_helper.c')
| -rw-r--r-- | target/s390x/cc_helper.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/target/s390x/cc_helper.c b/target/s390x/cc_helper.c index 307ad61..0e467bf 100644 --- a/target/s390x/cc_helper.c +++ b/target/s390x/cc_helper.c @@ -397,6 +397,11 @@ static uint32_t cc_calc_flogr(uint64_t dst) return dst ? 2 : 0; } +static uint32_t cc_calc_lcbb(uint64_t dst) +{ + return dst == 16 ? 0 : 3; +} + static uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst, uint64_t vr) { @@ -506,6 +511,9 @@ static uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, case CC_OP_FLOGR: r = cc_calc_flogr(dst); break; + case CC_OP_LCBB: + r = cc_calc_lcbb(dst); + break; case CC_OP_NZ_F32: r = set_cc_nz_f32(dst); |