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Should one use < or
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I remember from my days when we did 8086 Assembly at college it was more performant to do:
for (int i = 6; i > -1; i--)
as there was a JNS operation that means Jump if No Sign. Using this meant that there was no memory lookup after each cycle to get the c...
Is the sizeof(some pointer) always equal to four?
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@monjardin: IIRC, the 8086 was like that. There was a 16 bit address and a 4 bit segment register. I believe a normal "NEAR" pointer was 16 bits and a pointer declared as "FAR" was more, probably 24, though I'm not sure.
– ...
C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...中的二进位划分为几个不同的区域， 并说明每个区域的位数。每个域有一个域名，允许在程序中按域名进行操作。 这样就可以把几个不同的对象用一个字节的二进制位域来表示。一、位域的定义和位域变量的说明位域定义与结...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...on_b = {numerator=4, denominator=7}复制代码
我们想实现分数间的相加：2/3 + 4/7，我们如果要执行： fraction_a + fraction_b，会报错的。所以，我们可以动用MetaTable，如下所示：fraction_op={}
function fraction_op.__add(f1, f2)
ret = {}
&nbs...
What is uintptr_t data type
...than a pointer. This would be expected on segmented architectures like the 8086 (16 bits size_t, but 32 bits void*)
– MSalters
Dec 4 '09 at 9:08
3
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Are types like uint32, int32, uint64, int64 defined in any stdlib header?
... It was built to be able to perform 64-bit arithmetic, if only because the 8086 needed to be able to do 32-bit arithmetic.
– Michael Morris
Apr 8 '14 at 2:47
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Why aren't programs written in Assembly more often? [closed]
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I've written shedloads of assembler for the 6502, Z80, 6809 and 8086 chips. I stopped doing so as soon as C compilers became available for the platforms I was addressing, and immediately became at least 10x more productive. Most good programmers use the tools they use for rational reason...
clang: how to list supported target architectures?
...vailable features for this target:
16bit-mode - 16-bit mode (i8086).
32bit-mode - 32-bit mode (80386).
3dnow - Enable 3DNow! instructions.
3dnowa - Enable 3DNow! Athlon instructions.
64bit - Support 64-bit instructions.
64b...
A fast method to round a double to a 32-bit int explained
...hen doing a fist, then restoring the fp rounding mode.
Now on the original 8086/8087, this wasn't too bad, but on later processors that started to get super-scalar and out-of-order execution, altering the fp rounding mode generally seriales the CPU core and is quite expensive. So on a CPU like a Pe...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
...imenting to see if a favicon could be created out of an emoji:
https://lean8086.com/articles/using-an-emoji-as-favicon-with-svg/
Linares' hunch was right.
Several months later (March 2020), Code Pirate Lea Verou realised the same thing:
https://twitter.com/leaverou/status/1241619866475474946
And fav...