RDTSCP
REG0=XED_REG_EAX:w:SUPP REG1=XED_REG_EDX:w:SUPP REG2=XED_REG_ECX:w:SUPP REG3=XED_REG_TSC:r:SUPP REG4=XED_REG_TSCAUX:r:SUPP
x86_64 X86_LEGACY SYSTEM RDTSCP source: xed
XED_RDTSCP_X86_LEGACY_0F_01_799205
Encoding
| encoding_kind | X86_LEGACY |
| opcode_bytes | 01 |
| opcode_map | 0F |
| mandatory_prefix | - |
| has_modrm | True |
| modrm.reg = /7 | /7 |
| cpl | 3 |
| raw_encoding | 0x0F 0x01 MOD[0b11] MOD=3 REG[0b111] RM[0b001] |
Operands (5)
| # | Role | Kind | Class / Reg | Width | Access | Visibility | Encoded in |
|---|---|---|---|---|---|---|---|
| 0 | REG0 | REG | (=EAX) | w | W | SUPPRESSED | MODRM_REG |
| 1 | REG1 | REG | (=EDX) | w | W | SUPPRESSED | MODRM_REG |
| 2 | REG2 | REG | (=ECX) | w | W | SUPPRESSED | MODRM_REG |
| 3 | REG3 | REG | R | SUPPRESSED | MODRM_REG | ||
| 4 | REG4 | REG | R | SUPPRESSED | MODRM_REG |
Micro-ops sequence (0)
No micro-ops authored for this encoding. Emulator semantics not yet defined — decoder still works.