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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...
全食超市（Whole Foods Market）——精品超市的运营之道 - 资讯 - 清泛网 -...
....7%的顾客家庭年收入在10万美元以（2014年美国家庭收入中位数为5.36万美元）；且选择全食超市的消费者中，仅1.5%的消费者表示受价格因素驱使，“有机/健康”（45.5%）、“质量”（21%）、环保（6.5%）等对全食所倡导的生活方式...
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.
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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...