nasm/regs.dat

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#
# 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[, token flag]
#
# 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.
#
# If 'token flag' is present, this value will be assigned to tokflag field in
# 'struct tokendata tokendata[]' table. Token flag can be used for specifying
# special usage of corresponding register. E.g. opmask registers can be either
# enclosed by curly braces or standalone operand depending on the usage.
#

# 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
es	REG_ES		sreg		0
cs	REG_CS		sreg		1
ss	REG_SS		sreg		2
ds	REG_DS		sreg		3
fs	REG_FS		sreg		4
gs	REG_GS		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	XMM_L16		xmmreg		1
xmm16-31	XMMREG		xmmreg		16

# AVX registers
ymm0	YMM0		ymmreg		0
ymm1-15	YMM_L16		ymmreg		1
ymm16-31	YMMREG		ymmreg		16

# AVX512 registers
zmm0	ZMM0		zmmreg		0
zmm1-15	ZMM_L16		zmmreg		1
zmm16-31	ZMMREG		zmmreg		16

# Opmask registers
k0	OPMASK0		opmaskreg	0
k1-7	OPMASKREG	opmaskreg	1   TFLAG_BRC_OPT

# Bounds registers
bnd0-3	BNDREG		bndreg		0