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| author | Richard Henderson <rth@twiddle.net> | 2012-09-01 11:14:04 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-01-05 12:18:45 -0800 |
| commit | 99b4f24b3e636ab241b53bc16bf8f0a0ac4a2271 (patch) | |
| tree | f7fe0ebe88043f9fe0952d665aa5f312e2d00016 /target-s390x/int_helper.c | |
| parent | 2112bf1bfb696def31b211425e5e74e89f9574c3 (diff) | |
| download | qemu-99b4f24b3e636ab241b53bc16bf8f0a0ac4a2271.tar.gz | |
target-s390: Implement POPCNT
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-s390x/int_helper.c')
| -rw-r--r-- | target-s390x/int_helper.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target-s390x/int_helper.c b/target-s390x/int_helper.c index dc16de206c..685830124f 100644 --- a/target-s390x/int_helper.c +++ b/target-s390x/int_helper.c @@ -191,3 +191,15 @@ uint64_t HELPER(cvd)(int32_t bin) return dec; } + +uint64_t HELPER(popcnt)(uint64_t r2) +{ + uint64_t ret = 0; + int i; + + for (i = 0; i < 64; i += 8) { + uint64_t t = ctpop32((r2 >> i) & 0xff); + ret |= t << i; + } + return ret; +} |