fpu

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Third party code is modifying the FPU control word

The introduction - the long and boring part (The question is at the end) I am getting severe head aches over a third party COM component that keeps changing the FPU control word.[详细]

2023-03-26 05:21 分类：问答
Passing a double to a function through inline x86

I am not a professional at assembly by any means and am receiving the following error when running my code: \"Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call[详细]

2023-03-06 00:58 分类：问答
Setting FPU in Windows & OS X

I\'m doing a program to set the precision control of the FPU to 24 bits and the rounding mode to \"near\" using the _controlfp_s function. I want to create a dll for Windows and a bundle for OS X.[详细]

2023-02-17 22:22 分类：问答
Integer division vs double division - optimization question

Which operation should be faster on a x86 CPU on Linux and what are the averag开发者_JAVA百科e differences (in %):[详细]

2023-01-24 20:24 分类：问答
How slow is NaN arithmetic in the Intel x64 FPU?

Hints and allegations abound that arithmetic with NaNs can be \'slow\' in hardware FPUs. Specifically in the modern x64 FPU, e.g on a Nehalem i7, is that still true? Do FPU multiplies get churned out[详细]

2023-01-14 10:33 分类：问答
Fast float to int conversion and floating point precision on ARM (iPhone 3GS/4)

I read (http://www.stereopsis.com/FPU.html) mentioned in (What is the fastest way to convert float to int on x86). Does anyone know if the slow simple cast (see snippet below) does apply to ARM archit[详细]

2023-01-12 01:51 分类：问答
How to set double precision in C++ on MacOSX?

I\'m trying to port _controlfp( _CW_DEF开发者_运维知识库AULT, 0xffffffff ); from WIN32 to Mac OS X / Intel. I have absolutely no idea how to port this instruction... And you? Thanks!Try section 8.6 of[详细]

2022-12-31 17:20 分类：问答
What Determines the Default Setting of the x87 FPU Control Word?

What determines the default setting of the x87 FPU control word -- specifically, the precision control field? Does the compiler set it based on the target processor? Is there a compiler option to chan[详细]

2022-12-25 11:05 分类：问答
Is the FPU control word setting per-thread or per-process?

I ne开发者_JS百科ed to change the FPU control word from its default setting in a multithreaded application. Is this setting per-thread or per-process? Does it have different scopes under Mac OS X and[详细]

2022-12-25 10:36 分类：问答
What database works well with 200+GB of data?

I\'ve been using mysql (with innodb; on Amazon rds) because it\'s sort of universal default, but it\'s been ridiculously under-performing, and tweaking it only delays the inevitable.[详细]

2022-12-24 23:03 分类：问答