Conditional Set Mask sets all bits of the destination register to 1 if the condition is TRUE, and otherwise sets all bits to 0.
如果条件为TRUE,则条件设置掩码将目标寄存器的所有位设置为1,否则将所有位设为0。
32-bit variant
Applies when sf == 0.
CSETM <Wd>, <cond>
64-bit variant
Applies when sf == 1.
CSETM <Xd>, <cond>
411c64: f100001f cmp x0, #0x0
411c68: a94363f7 ldp x23, x24, [sp, #48]
411c6c: f900b680 str x0, [x20, #360]
411c70: 5a9f13e0 csetm w0, eq // if (x0 == 0x0) w0=0xffffffff, else w0 = 0