FISTTP
X87_ALU SSE3X87 x86_64
FISTTP is an instruction of the x86_64 architecture (x86 / x86-64 (covers 16/32/64-bit modes)), category X87_ALU. This page lists its 3 encoding forms, distinguished by opcode bytes: DB, DD, DF.
Each form below links to its full decode: the operand roles and where each one is encoded in the instruction, the flag and register effects, and any micro-op sequence authored for it.
XED_FISTTP_X86_LEGACY_ONEBYTE_DB_946258
MEM0:w:mem32int REG0=XED_REG_ST0:r:IMPL:f80 REG1=XED_REG_X87POP:r:SUPP REG2=XED_REG_X87STATUS:w:SUPP
XED_FISTTP_X86_LEGACY_ONEBYTE_DD_974187
MEM0:w:m64int REG0=XED_REG_ST0:r:IMPL:f80 REG1=XED_REG_X87POP:r:SUPP REG2=XED_REG_X87STATUS:w:SUPP
XED_FISTTP_X86_LEGACY_ONEBYTE_DF_240428
MEM0:w:mem16int REG0=XED_REG_ST0:r:IMPL:f80 REG1=XED_REG_X87POP:r:SUPP REG2=XED_REG_X87STATUS:w:SUPP