Predeclared ARM Register Names

9/7/2007

By default, the assembler predeclares the following register names:

R0–R15 and r0–r15
c0–c15 coprocessor registers
p0–p15 coprocessor registers
a1-a4 scratch registers, synonymous with r0-r3
v1-v8 variable registers, synonymous with r4-r11
sb and SB stack base, synonymous with r9
sl and SL stack base, synonymous with r10
fp and FP frame pointer, synonymous with r11
ip and IP intra-procedure call scratch register, synonymous with r12
sp and SP stack pointer, synonymous with r13
lr and LR link register, synonymous with r14
pc and PC program counter, synonymous with r15
s0-s32 VFP single precision registers
d0-d16 VFP double precision registers
fpsid VFP system ID register
fpscr VFP status and control register
fpexc VFP exception register
wr0-wr16 WMMX SIMD data registers
wc0-wc16 WMMX status and control registers
wcid WMMX coprocessor ID register, synonymous with wc0
wcon WMMX control register, synonymous with wc1
wcssf WMMX saturation SIMD flags, synonymous with wc2
wcasf WMMX arithmetic SIMD flags, synonymous with wc3
wcgr0-wcgr3 WMMX control general purpose registers, synonymous with wc8-wc11

See Also