diff options
Diffstat (limited to 'src/emu')
| -rw-r--r-- | src/emu/x64runf30f.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/emu/x64runf30f.c b/src/emu/x64runf30f.c index a5e02d59..1960238e 100644 --- a/src/emu/x64runf30f.c +++ b/src/emu/x64runf30f.c @@ -291,6 +291,24 @@ int RunF30F(x64emu_t *emu, rex_t rex) } } break; + case 0xBD: /* LZCNT Ed,Gd */ + CHECK_FLAGS(emu); + nextop = F8; + GETED(0); + GETGD; + if(rex.w) { + tmp64u = ED->q[0]; + tmp8u = (tmp64u)?__builtin_clzl(tmp64u):64; + CONDITIONAL_SET_FLAG(tmp8u==0, F_ZF); + CONDITIONAL_SET_FLAG(tmp8u==64, F_CF); + } else { + tmp32u = ED->dword[0]; + tmp8u = (tmp32u)?__builtin_clz(tmp32u):32; + CONDITIONAL_SET_FLAG(tmp8u==0, F_ZF); + CONDITIONAL_SET_FLAG(tmp8u==32, F_CF); + } + GD->q[0] = tmp8u; + break; case 0xC2: /* CMPSS Gx, Ex, Ib */ nextop = F8; |