# # List of registers and their classes; classes are defined in nasm.h # # The columns are: # # register name, assembler class, disassembler class(es), x86 register number # # If the register name ends in two numbers separated by a dash, then it is # repeated as many times as indicated, and the register number is # updated with it. # # General-purpose registers al REG_AL reg8,reg8_rex 0 ah REG_HIGH reg8 4 ax REG_AX reg16 0 eax REG_EAX reg32 0 rax REG_RAX reg64 0 bl REG8NA reg8,reg8_rex 3 bh REG_HIGH reg8 7 bx REG16NA reg16 3 ebx REG32NA reg32 3 rbx REG64NA reg64 3 cl REG_CL reg8,reg8_rex 1 ch REG_HIGH reg8 5 cx REG_CX reg16 1 ecx REG_ECX reg32 1 rcx REG_RCX reg64 1 dl REG_DL reg8,reg8_rex 2 dh REG_HIGH reg8 6 dx REG_DX reg16 2 edx REG_EDX reg32 2 rdx REG_RDX reg64 2 spl REG8NA reg8_rex 4 sp REG16NA reg16 4 esp REG32NA reg32 4 rsp REG64NA reg64 4 bpl REG8NA reg8_rex 5 bp REG16NA reg16 5 ebp REG32NA reg32 5 rbp REG64NA reg64 5 sil REG8NA reg8_rex 6 si REG16NA reg16 6 esi REG32NA reg32 6 rsi REG64NA reg64 6 dil REG8NA reg8_rex 7 di REG16NA reg16 7 edi REG32NA reg32 7 rdi REG64NA reg64 7 r8-15b REG8NA reg8_rex 8 r8-15w REG16NA reg16 8 r8-15d REG32NA reg32 8 r8-15 REG64NA reg64 8 # Segment registers cs REG_CS sreg 1 ds REG_DESS sreg 3 es REG_DESS sreg 0 ss REG_DESS sreg 2 fs REG_FSGS sreg 4 gs REG_FSGS sreg 5 segr6-7 REG_SEG67 sreg 6 # Control registers cr0-15 REG_CREG creg 0 # Debug registers dr0-15 REG_DREG dreg 0 # Test registers tr0-7 REG_TREG treg 0 # Floating-point registers st0 FPU0 fpureg 0 st1-7 FPUREG fpureg 1 # MMX registers mm0-7 MMXREG mmxreg 0 # SSE registers xmm0 XMM0 xmmreg 0 xmm1-15 XMMREG xmmreg 1 # AVX registers ymm0 YMM0 ymmreg 0 ymm1-15 YMMREG ymmreg 0