FDECSTP
REG0=XED_REG_X87STATUS:rw:SUPP
x86_64 X86_LEGACY X87_ALU X87 source: xed
XED_FDECSTP_X86_LEGACY_ONEBYTE_D9_517061
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | D9 |
| opcode_map | ONEBYTE |
| mandatory_prefix | - |
| has_modrm | True |
| modrm.reg = /6 | /6 |
| attributes | X87_CONTROL NOTSX |
| cpl | 3 |
| raw_encoding | 0xD9 MOD[0b11] MOD=3 REG[0b110] RM[0b110] |
Operands (1)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | RW | SUPPRESSED | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.