Math-O5 / ASSEMBLY-MIPS-32

Some implementations and works using this amazing language.

ASSEMBLY-MIPS-32

Some implementations and works using this amazing language.
Algumas implementações e projetos usando essa incrivel linguagem.

Projects

Mips Calculator construida usando apenas ASSEMBLY-MIPS.

Sample códigos em C traduzidos para ssembly.

ARCHITECTURE MIPS use all aritmetic and logic operation with your 32-bit registers, above here are them:

Numbers Registradores	Identifier Name	Description	Preseved across procedure calls
0	Zero	value 0
1	at	(assembler temporary) reserved by the assembler
2..3	$v0..$v1	(values) from expression evaluation and function results
4..7	$a0..$a3	(arguments) First four parameters for subroutine.	No
8..15	$t0..$t7	(temporaries) Caller saved if needed. Subroutines can use w/out saving.	No
16..23	$s0..$s7	(saved values) - Callee saved.	No
24..25	$t8..$t9	(temporaries) Caller saved if needed. Subroutines can use w/out saving.
26..27	$k0..$k1	reserved for use by the interrupt/trap handler
28	$gp	global pointer. Points to the middle of the 64K block of memory in the static data segment.
29	$sp	stack pointer. Points to last location on the stack.
30	$s8/$fp	saved value / frame pointer	Yes
31	$ra	return address

Data types

key	bit	byte	description
Instruction	32	4	operation like add, sub, move and so on
word	32	4	store integer, for example
char	4	1

Logical operation

Using the boolean algebric with assembly.

  sll $t2,$s0,4       # shift left logical: registrador $t2 << 4 bits 
  srl $t2,$s0,4       # shift right logical: reg $t2 >> 4 bits
  or  $t0,$t1,$t2     # OR: reg $t0 = reg ($t1 | $t2)
  and $t0,$t1,$t2     # AND: reg $t0 = reg ($t1 & $t2)
  nor $t0,$t1,$t2     # NOT OR: reg $t0 = reg ~($t1 | $t2)

If-then-else and while

  if(i == j) f = g + h; else f = g - h;       # Let's execute this
  f = g + (i == j)? h : -h;                   # Rewrite!
  # f,g,h,i,j is $s0..$s4
  bne $s3,$s4,Else        # Go to Else case i != j
  add $s0,$s1,$s2         # f = g + h
  j Exit                  # jump to Exit
  Else:sub $s0,$s1,$s2    # f = g - h
  Exit:
      li $v0,1
      la $a0,10           # Exit program is 10
      syscall

OBS

• Registers are the fastest memory in the computer.
• '~' this is the complement. If the number is 0101, the ~(0101) = 1010

Reference

Organização e projeto de computadores, DAVID A. PATTERSON e JOHN L. HENNESSY.\n http://logos.cs.uic.edu/366/notes/