https://github.com/jevinskie/fpudump
A simple, header only library to dump x87 FPU state
https://github.com/jevinskie/fpudump
Last synced: 3 months ago
JSON representation
A simple, header only library to dump x87 FPU state
- Host: GitHub
- URL: https://github.com/jevinskie/fpudump
- Owner: jevinskie
- License: mit
- Created: 2015-05-23T22:51:08.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2015-05-23T22:57:48.000Z (over 10 years ago)
- Last Synced: 2025-07-27T04:21:04.359Z (3 months ago)
- Language: C
- Homepage:
- Size: 168 KB
- Stars: 9
- Watchers: 3
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# fpudump
A simple, header only library to dump x87 FPU state in an OllyDbg style format. I wrote this to figure out what was going wrong with a program. Turns out there was a [bug in newlib](http://thread.gmane.org/gmane.comp.lib.newlib/3523/).
Example:
#include "fpu_dump.h"
...
double x = 243;
FPUDUMP;
x = x / 3.14;
FPUDUMP;
Example output:
================== MAGICAL FPU INSPECTOR ==================
From fpu_dump.c line 20:
Status: 0x0020
Invalid: 0, Denorm: 0, Zero Div: 0
Overflow: 0, Underflow: 0, Precision: 1
Stack fault: 0, Error summary: 0, TOP: 0
C3: 0, C2: 0, C1: 0, C0: 0
Control: 0x037F
Invalid Mask: 1, Denorm Mask: 1, Zero Div Mask: 1
Overflow Mask: 1, Underflow Mask: 1, Precision Mask: 1
Rounding: NEAR, Precision: 64, Infinity: 0
3 2 1 0 E S P U O Z D I
FST 0020 Cond 0 0 0 0 Err 0 0 1 0 0 0 0 0 (GT)
FCW 037F Prec NEAR,64 Mask 1 1 1 1 1 1
ST0 EMPTY NAN REG0
FFFF 00000000 00000000
ST1 EMPTY 0 REG1
0000 00000000 00000000
ST2 EMPTY 0 REG2
0000 00000000 00000000
ST3 EMPTY 0 REG3
0000 00000000 00000000
ST4 EMPTY 0 REG4
0000 00000000 00000000
ST5 EMPTY 0 REG5
0000 00000000 00000000
ST6 EMPTY 16045690984229361664 REG6
403E DEADBEEF BAADD800
ST7 EMPTY 16045690984229355520 REG7
403E DEADBEEF BAADC0DF
========================= GOODBYE =========================