yasm：预期的 `,' 具有立即值
yasm: Expected `,' with immediate value
给定以下汇编程序：
BITS 64
mov rax, 0b111
Yasm 输出：
error: expected `,'
为什么这里需要逗号？ NASM 愉快地组装了这个。
来自 YASM 手册：
3.5.1. Numeric Constants
A numeric constant is simply a number. NASM allows you to specify numbers in a variety of number bases, in a variety of ways: you can suffix H, Q or O, and B for hex, octal, and binary, or you can prefix 0x for hex in the style of C, or you can prefix $ for hex in the style of Borland Pascal.
Some examples:
mov ax,10010011b ; binary
NASM手册增加：
In addition, current versions of NASM accept the prefix 0h for hexadecimal, 0d or 0t for decimal, 0o or 0q for octal, and 0b or 0y for binary.
TL;DR：虽然 NASM 支持二进制文字的 b 后缀和 0b 前缀，但 YASM 仅支持后缀变体。所以0b111需要写成111b.
给定以下汇编程序：
BITS 64
mov rax, 0b111
Yasm 输出：
error: expected `,'
为什么这里需要逗号？ NASM 愉快地组装了这个。
来自 YASM 手册：
3.5.1. Numeric Constants
A numeric constant is simply a number. NASM allows you to specify numbers in a variety of number bases, in a variety of ways: you can suffix H, Q or O, and B for hex, octal, and binary, or you can prefix 0x for hex in the style of C, or you can prefix $ for hex in the style of Borland Pascal.
Some examples:
mov ax,10010011b ; binary
NASM手册增加：
In addition, current versions of NASM accept the prefix 0h for hexadecimal, 0d or 0t for decimal, 0o or 0q for octal, and 0b or 0y for binary.
TL;DR：虽然 NASM 支持二进制文字的 b 后缀和 0b 前缀，但 YASM 仅支持后缀变体。所以0b111需要写成111b.