Computer Systems: A Programmer's Perspective (3rd Edition)

3rd Edition

ISBN: 9780134092669

Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron

Publisher: PEARSON

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Expert Solution & Answer

Chapter 3.11, Problem 3.51PP

Explanation of Solution

Table for code sequences:

The details of table are shown below:

T_x T_y Instructions
long double vcvtsi2sdq %rdi, %xmm0, %xmm0
double int vcvttsd2si %xmm0, %eax
float double
vunpcklpd %xmm0, %xmm0, %xmm0

vcvtpd2ps %xmm0, %xmm0
long float vcvtsi2ssq %rdi, %xmm0, %xmm0
float long vcvttss2siq %xmm0, %rax

Explanation:

The argument “x” is either in “%xmm0” or in named portion of register “%rdi”.

The assembly instructions are used to perform type conversion and to copy value to named portion of register “%rax”...

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Chapter 3.11, Problem 3.50PP

Chapter 3.11, Problem 3.52PP

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Chapter 3 Solutions

Computer Systems: A Programmer's Perspective (3rd Edition)

Ch. 3.4 - Prob. 3.1PP Ch. 3.4 - Prob. 3.2PP Ch. 3.4 - Prob. 3.3PP Ch. 3.4 - Prob. 3.4PP Ch. 3.4 - Prob. 3.5PP Ch. 3.5 - Prob. 3.6PP Ch. 3.5 - Prob. 3.7PP Ch. 3.5 - Prob. 3.8PP Ch. 3.5 - Prob. 3.9PP Ch. 3.5 - Prob. 3.10PP

Knowledge Booster

T_x	T_y	Instructions
long	double	vcvtsi2sdq %rdi, %xmm0, %xmm0
double	int	vcvttsd2si %xmm0, %eax
float	double	vunpcklpd %xmm0, %xmm0, %xmm0 vcvtpd2ps %xmm0, %xmm0
long	float	vcvtsi2ssq %rdi, %xmm0, %xmm0
float	long	vcvttss2siq %xmm0, %rax

Solution Summary: The author explains how the assembly instructions are used to perform type conversion and to copy value to named portion of register "%rax".

Explanation of Solution

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Chapter 3 Solutions