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Beginning x64 Assembly Programming: From Novice to AVX Professional
book

Beginning x64 Assembly Programming: From Novice to AVX Professional

by Jo Van Hoey
October 2019
Beginner
407 pages
6h 50m
English
Apress
Content preview from Beginning x64 Assembly Programming: From Novice to AVX Professional
© Jo Van Hoey 2019
J. Van HoeyBeginning x64 Assembly Programminghttps://doi.org/10.1007/978-1-4842-5076-1_27

27. Watch Your MXCSR

Jo Van Hoey1 
(1)
Hamme, Belgium
 
Before diving into SSE programming, you need to understand the SSE control and status register for floating-point operations, called mxcsr. It is a 32-bit register, of which only the lower 16 bits are used. Here is the layout:

Bit

Mnemonic

Meaning

0

IE

Invalid operation error

1

DE

Denormal error

2

ZE

Divide-by-zero error

3

OE

Overflow error

4

UE

Underflow error

5

PE

Precision error

6

DAZ

Denormals are zeros

7

IM

Invalid operation mask

8

DM

Denormal operation mask

9

ZM

Divide-by-zero mask

10

OM

Overflow mask

11

UM

Underflow mask

12

PM

Precision mask

13

RC

Rounding control

14

RC

Rounding control

15

FZ

Flush to zero

Bits 0 to 5 indicate when ...
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Publisher Resources

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