x86-64 floating-point instructions
asm sub instruction
fsub meaning
x86 in instruction
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x86 assembly instructions

x86 Assembly Language Reference Manual. Previous: Addition Instructions · Next: Subtraction Instructions. Subtract Real and Pop (fsub). fsub{ls} Use of PC and SP in ARM instructions. You cannot use PC for or any operand in a SUB instruction that has a register-controlled shift.In some assemblers, the mnemonic for this instruction is FSUB rather than FSUBP. The FISUB instructions convert an integer source operand to double Most x86 instructions support two operands of which one operand can be a memory operand. This is supported by encoding the operands in a x86 assembly tutorials, x86 opcode reference, programming, pastebin with syntax highlighting. The FSUBP instructions perform the additional operation of popping the FPU register stack following the subtraction. To pop the register stack, the processor This document gives a brief summary of the x86-64 architecture and instruction set. It concentrates on features likely to be useful to compiler writing. For the fsubp instruction, the source operand must be st(0) . With two register operands, the fsubr and fsubrp instruction work in a similar fashion to fsub and