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search in a string

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Join Date: Dec 2007

Posts: 10

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pdrino

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search in a string

Dec 24th, 2007

Hi everyone, i need to write a code with mips assembly that works on a string given by a user (command line input).

The code is supposed to search another given string in that string. There is a problem in my mind, in mips is there any instruction that search a string in another one, i mean without comparison byte by byte or chra by char. Also, i don't know how can i goto at a specific location on that string, for example to reach 12th character of the given string if i have the string like that:

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
	.text
	.globl main
main:
	subu $sp, $sp,4
	sw $ra,0($sp)
 
	li      $v0, 8                    # Read string.
	la      $a0, buf                # Buffer
	li      $a1, 256                # Length of buffer
	syscall
 
 
	# Space for the input string.
	buf:    .space  256
	.text
	.globl main
main:
	subu $sp, $sp,4
	sw $ra,0($sp)
	
	li      $v0, 8                    # Read string.
	la      $a0, buf                # Buffer
	li      $a1, 256                # Length of buffer
	syscall
	
	
	# Space for the input string.
	buf:    .space  256

I gave "the string & the string" as input and how can i reach/get 12th character?

Thanks in advance...

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Join Date: Dec 2007

Posts: 10

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pdrino

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Re: search in a string

Dec 24th, 2007

...deleted...

Last edited by pdrino; Dec 24th, 2007 at 8:48 pm. Reason: repeated post

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Join Date: Dec 2007

Posts: 10

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pdrino

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Re: search in a string

Dec 24th, 2007

Sorry for my carelessness, i learnt how to reach a specific location in a string but i still need some answer for searching in string.

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Join Date: Oct 2007

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Duoas

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Re: search in a string

Dec 27th, 2007

MIPS is specifically designed to have as few instructions as possible/reasonable. Therefore, there aren't any string opcodes. You'll have to do it char by char. Sorry.