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MARS assembly spec
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| # MARS Assembly Specification | |
| ## Basic Instructions | |
| ### Branch | |
| * bc1f 1, label | |
| * bc1t 1, label | |
| * bc1f label | |
| * bc1t label | |
| * bgez $t1, label | |
| * bgezal $t1, label | |
| * bgtz $t1, label | |
| * beq $t1, $t2, label | |
| * blez $t1, label | |
| * bltz $t1, label | |
| * bltzal $t1, label | |
| * bne $t1, $t2, label | |
| ### Compare | |
| * c.eq.d $f2, $f4 | |
| * c.eq.d 1, $f2, $f4 | |
| * c.lt.d $f2, $f4 | |
| * c.lt.d 1, $f2, $f4 | |
| * c.le.d $f2, $f4 | |
| * c.le.d 1, $f2, $f4 | |
| * c.eq.s $f0, $f1 | |
| * c.eq.s 1, $f0, $f1 | |
| * c.lt.s $f0, $f1 | |
| * c.lt.s 1, $f0, $f1 | |
| * c.le.s $f0, $f1 | |
| * c.le.s 1, $f0, $f1 | |
| ### Convert | |
| * cvt.s.d $f1, $f2 | |
| * cvt.w.d $f1, $f2 | |
| * cvt.d.s $f2, $f1 | |
| * cvt.w.s $f0, $f1 | |
| * cvt.d.w $f2, $f1 | |
| * cvt.s.w $f0, $f1 | |
| ### Jump | |
| * j target | |
| * jal target | |
| * jalr $t1, $t2 | |
| * jalr $t1 | |
| * jr $t1 | |
| ### Logic | |
| * and $t1, $t2, $t3 | |
| * andi $t1, $t2, 100 | |
| * neg.d $f2, $f4 | |
| * neg.s $f0, $f1 | |
| * nor $t1, $t2, $t3 | |
| * or $t1, $t2, $t3 | |
| * ori $t1, $t2, 100 | |
| * sll $t1, $t2, 10 | |
| * sllv $t1, $t2, $t3 | |
| * sra $t1, $t2, 10 | |
| * srav $t1, $t2, $t3 | |
| * srl $t1, $t2, 10 | |
| * srlv $t1, $t2, $t3 | |
| * xor $t1, $t2, $t3 | |
| * xori $t1, $t2, 100 | |
| ### Double Math | |
| * abs.d $f2, $f4 | |
| * add.d $f2, $f4, $f6 | |
| * ceil.w.d $f1, $f2 | |
| * div.d $f2, $f4, $f6 | |
| * floor.w.d $f1, $f2 | |
| * mul.d $f2, $f4, $f6 | |
| * sqrt.d $f2, $f4 | |
| * sub.d $f2, $f4, $f6 | |
| * round.w.d $f1, $f2 | |
| * trunc.w.d $f1, $f2 | |
| ### Integer Math | |
| * add $t1, $t2, $t3 | |
| * addi $t1, $t2, -100 | |
| * addiu $t1, $t2, -100 | |
| * addu $t1, $t2, $t3 | |
| * clo $t1, $t2 | |
| * clz $t1, $t2 | |
| * div $t1, $t2 | |
| * divu $t1, $t2 | |
| * mult $t1, $t2 | |
| * madd $t1, $t2 | |
| * maddu $t1, $t2 | |
| * mul $t1, $t2, $t3 | |
| * msub $t1, $t2 | |
| * msubu $t1, $t2 | |
| * multu $t1, $t2 | |
| * sub $t1, $t2, $t3 | |
| * subu $t1, $t2, $t3 | |
| ### Float Math | |
| * abs.s $f0, $f1 | |
| * add.s $f0, $f1, $f3 | |
| * ceil.w.s $f0, $f1 | |
| * div.s $f0, $f1, $f3 | |
| * floor.w.s $f0, $f1 | |
| * mul.s $f0, $f0, $f3 | |
| * sqrt.s $f0, $f1 | |
| * sub.s $f0, $f1, $f3 | |
| * round.w.s $f0, $f1 | |
| * trunc.w.s $f0, $f1 | |
| ### Load | |
| * lb $t1, -100($t2) | |
| * lbu $t1, -100($t2) | |
| * ldc1 $f2, -100($t2) | |
| * lh $t1, -100($t2) | |
| * lhu $t1, -100($t2) | |
| * ll $t1, -100($t2) | |
| * lui $t1, 100 | |
| * lw $t1, -100($t2) | |
| * lwc $f1, -100($t2) | |
| * lwl $t1, -100($t2) | |
| * lwr $t1, -100($t2) | |
| ### Store | |
| * sb $t1, -100($t2) | |
| * sc $t1, -100($t2) | |
| * sdc $f2, -100($t2) | |
| * sh $t1, -100($t2) | |
| * sw $t1, -100($t2) | |
| * swc1 $f1, -100($t2) | |
| * swl $t1, -100($t2) | |
| * swr $t1, -100($t2) | |
| ### Move | |
| * movn $t1, $t2, $t3 | |
| * movz $t1, $t2, $t3 | |
| * mov.d $f2, $f4 | |
| * movf.d $f2, $f4, 1 | |
| * movt.d $f2, $f4, 1 | |
| * movf.d $f2, $f4 | |
| * movt.d $f2, $f4 | |
| * movn.d $f2, $f4, $t3 | |
| * movz.d $f2, $f4, $t3 | |
| * mov.s $f0, $f1 | |
| * movf.s $f0, $f1, 1 | |
| * movt.s $f0, $f1, 1 | |
| * movf.s $f0, $f1 | |
| * movt.s $f0, $f1 | |
| * movn.s $f0, $f1, $t3 | |
| * movz.s $f0, $f1, $t3 | |
| * mfc0 $t1, 8 | |
| * mfc1 $t1, $f1 | |
| * mfhi $t1 | |
| * mflo $t1 | |
| * movf $t1, $t2, 1 | |
| * movt $t1, $t2, 1 | |
| * movf $t1, $t2 | |
| * movt $t1, $t2 | |
| * mtc0 $t1, 8 | |
| * mtc1 $t1, $f1 | |
| * mthi $t1 | |
| * mtli $t1 | |
| ### Set | |
| * slt $t1, $t2, $t3 | |
| * slti $t1, $t2, -100 | |
| * sltiu $t1, $t2, -100 | |
| * sltu $t1, $t2, $t3 | |
| ### System | |
| * break 100 | |
| * break | |
| * syscall | |
| * nop | |
| ### Traps | |
| * eret | |
| * teq $t1, $t2 | |
| * teqi $t1, -100 | |
| * tge $t1, $t2 | |
| * tgei $t1, -100 | |
| * tgeiu $t1, -100 | |
| * tgeu $t1, $t2 | |
| * tlt $t1, $t2 | |
| * tlti $t1, -100 | |
| * tltiu $t1, -100 | |
| * tltu $t1, $t2 | |
| * tne $t1, $t2 | |
| * tnei $t1, -100 | |
| ## Extended/"Pseudo" Instructions | |
| **NOTE:** These instructions are not logically grouped like the previous items. They are automatically expanded by the | |
| MARS extended instruction parser. | |
| * not $t1, $t2 | |
| * add $t1, $t2, -100 | |
| * add $t1, $t2, 100000 | |
| * addu $t1, $t2, 100000 | |
| * addi $t1, $t2, 100000 | |
| * addiu $t1, $t2, 100000 | |
| * sub $t1, $t2, -100 | |
| * sub $t1, $t2, 100000 | |
| * subu $t1, $t2, 100000 | |
| * subi $t1, $t2, -100 | |
| * subi $t1, $t2, 100000 | |
| * subiu $t1, $t2, 100000 | |
| * andi $t1, $t2, 100000 | |
| * ori $t1, $t2, 100000 | |
| * xori $t1, $t2, 100000 | |
| * and $t1, $t2, 100 | |
| * or $t1, $t2, 100 | |
| * xor $t1, $t2, 100 | |
| * and $t1, 100 | |
| * or $t1, 100 | |
| * xor $t1, 100 | |
| * andi $t1, 100 | |
| * ori $t1, 100 | |
| * xori $t1, 100 | |
| * andi $t1, 100000 | |
| * ori $t1, 100000 | |
| * xori $t1, 100000 | |
| * seq $t1, $t2, $t3 | |
| * seq $t1, $t2, -100 | |
| * seq $t1, $t2, 100000 | |
| * sne $t1, $t2, $t3 | |
| * sne $t1, $t2, -100 | |
| * sne $t1, $t2, 100000 | |
| * sge $t1, $t2, $t3 | |
| * sge $t1, $t2, -100 | |
| * sge $t1, $t2, 100000 | |
| * sgeu $t1, $t2, $t3 | |
| * sgeu $t1, $t2, -100 | |
| * sgeu $t1, $t2, 100000 | |
| * sgt $t1, $t2, $t3 | |
| * sgt $t1, $t2, -100 | |
| * sgt $t1, $t2, 100000 | |
| * sgtu $t1, $t2, $t3 | |
| * sgtu $t1, $t2, -100 | |
| * sgtu $t1, $t2, 100000 | |
| * sle $t1, $t2, $t3 | |
| * sle $t1, $t2, -100 | |
| * sle $t1, $t2, 100000 | |
| * sleu $t1, $t2, $t3 | |
| * sleu $t1, $t2, -100 | |
| * sleu $t1, $t2, 100000 | |
| * move $t1, $t2 | |
| * abs $t1, $t2 | |
| * neg $t1, $t2 | |
| * negu $t1, $t2 | |
| * b label | |
| * beqz $t1, label | |
| * bnez $t1, label | |
| * beq $t1, -100, label | |
| * beq $t1, 100000, label | |
| * bne $t1, -100, label | |
| * bne $t1, 100000, label | |
| * bge $t1, $t2, label | |
| * bge $t1, -100, label | |
| * bge $t1, 100000, label | |
| * bgeu $t1, $t2, label | |
| * bgeu $t1, -100, label | |
| * bgeu $t1, 100000, label | |
| * bgt $t1, $t2, label | |
| * bgt $t1, -100, label | |
| * bgt $t1, 100000, label | |
| * bgtu $t1, $t2, label | |
| * bgtu $t1, -100, label | |
| * bgtu $t1, 100000, label | |
| * ble $t1, $t2, label | |
| * ble $t1, -100, label | |
| * ble $t1, 100000, label | |
| * bleu $t1, $t2, label | |
| * bleu $t1, -100, label | |
| * bleu $t1, 100000, label | |
| * blt $t1, $t2, label | |
| * blt $t1, -100, label | |
| * blt $t1, 100000, label | |
| * bltu $t1, $t2, label | |
| * bltu $t1, -100, label | |
| * bltu $t1, 100000, label | |
| * rol $t1, $t2, $t3 | |
| * rol $t1, $t2, 10 | |
| * ror $t1, $t2, $t3 | |
| * ror $t1, $t2, 10 | |
| * mfc1.d $t1, $f2 | |
| * mtc1.d $t1, $f2 | |
| * mul $t1, $t2, -100 | |
| * mul $t1, $t2, 100000 | |
| * mulu $t1, $t2, $t3 | |
| * mulu $t1, $t2, -100 | |
| * mulu $t1, $t2, 100000 | |
| * mulo $t1, $t2, $t3 | |
| * mulo $t1, $t2, -100 | |
| * mulo $t1, $t2, 100000 | |
| * mulou $t1, $t2, $t3 | |
| * mulou $t1, $t2, -100 | |
| * mulou $t1, $t2, 100000 | |
| * div $t1, $t2, $t3 | |
| * div $t1, $t2, -100 | |
| * div $t1, $t2, 100000 | |
| * divu $t1, $t2, $t3 | |
| * divu $t1, $t2, -100 | |
| * divu $t1, $t2, 100000 | |
| * rem $t1, $t2, $t3 | |
| * rem $t1, $t2, -100 | |
| * rem $t1, $t2, 100000 | |
| * remu $t1, $t2, $t3 | |
| * remu $t1, $t2, -100 | |
| * remu $t1, $t2, 100000 | |
| * li $t1, -100 | |
| * li $t1, 100 | |
| * li $t1, 100000 | |
| * la $t1, ($t2) | |
| * la $t1, -100 | |
| * la $t1, 100 | |
| * la $t1, 100000 | |
| * la $t1, 100($t2) | |
| * la $t1, 100000($t2) | |
| * la $t1, label | |
| * la $t1, label($t2) | |
| * la $t1, label+100000 | |
| * la $t1, label+100000($t2) | |
| * lw $t1, ($t2) | |
| * lw $t1, -100 | |
| * lw $t1, 100 | |
| * lw $t1, 100000 | |
| * lw $t1, 100($t2) | |
| * lw $t1, 100000($t2) | |
| * lw $t1, label | |
| * lw $t1, label($t2) | |
| * lw $t1, label+100000 | |
| * lw $t1, label+100000($t2) | |
| * sw $t1, ($t2) | |
| * sw $t1, -100 | |
| * sw $t1, 100 | |
| * sw $t1, 100000 | |
| * sw $t1, 100($t2) | |
| * sw $t1, 100000($t2) | |
| * sw $t1, label | |
| * sw $t1, label($t2) | |
| * sw $t1, label+100000 | |
| * sw $t1, label+100000($t2) | |
| * lh $t1, ($t2) | |
| * lh $t1, -100 | |
| * lh $t1, 100 | |
| * lh $t1, 100000 | |
| * lh $t1, 100($t2) | |
| * lh $t1, 100000($t2) | |
| * lh $t1, label | |
| * lh $t1, label($t2) | |
| * lh $t1, label+100000 | |
| * lh $t1, label+100000($t2) | |
| * sh $t1, ($t2) | |
| * sh $t1, -100 | |
| * sh $t1, 100 | |
| * sh $t1, 100000 | |
| * sh $t1, 100($t2) | |
| * sh $t1, 100000($t2) | |
| * sh $t1, label | |
| * sh $t1, label($t2) | |
| * sh $t1, label+100000 | |
| * sh $t1, label+100000($t2) | |
| * lb $t1, ($t2) | |
| * lb $t1, -100 | |
| * lb $t1, 100 | |
| * lb $t1, 100000 | |
| * lb $t1, 100($t2) | |
| * lb $t1, 100000($t2) | |
| * lb $t1, label | |
| * lb $t1, label($t2) | |
| * lb $t1, label+100000 | |
| * lb $t1, label+100000($t2) | |
| * sb $t1, ($t2) | |
| * sb $t1, -100 | |
| * sb $t1, 100 | |
| * sb $t1, 100000 | |
| * sb $t1, 100($t2) | |
| * sb $t1, 100000($t2) | |
| * sb $t1, label | |
| * sb $t1, label($t2) | |
| * sb $t1, label+100000 | |
| * sb $t1, label+100000($t2) | |
| * lhu $t1, ($t2) | |
| * lhu $t1, -100 | |
| * lhu $t1, 100 | |
| * lhu $t1, 100000 | |
| * lhu $t1, 100($t2) | |
| * lhu $t1, 100000($t2) | |
| * lhu $t1, label | |
| * lhu $t1, label($t2) | |
| * lhu $t1, label+100000 | |
| * lhu $t1, label+100000($t2) | |
| * lbu $t1, ($t2) | |
| * lbu $t1, -100 | |
| * lbu $t1, 100 | |
| * lbu $t1, 100000 | |
| * lbu $t1, 100($t2) | |
| * lbu $t1, 100000($t2) | |
| * lbu $t1, label | |
| * lbu $t1, label($t2) | |
| * lbu $t1, label+100000 | |
| * lbu $t1, label+100000($t2) | |
| * lwl $t1, ($t2) | |
| * lwl $t1, -100 | |
| * lwl $t1, 100 | |
| * lwl $t1, 100000 | |
| * lwl $t1, 100($t2) | |
| * lwl $t1, 100000($t2) | |
| * lwl $t1, label | |
| * lwl $t1, label($t2) | |
| * lwl $t1, label+100000 | |
| * lwl $t1, label+100000($t2) | |
| * swl $t1, ($t2) | |
| * swl $t1, -100 | |
| * swl $t1, 100 | |
| * swl $t1, 100000 | |
| * swl $t1, 100($t2) | |
| * swl $t1, 100000($t2) | |
| * swl $t1, label | |
| * swl $t1, label($t2) | |
| * swl $t1, label+100000 | |
| * swl $t1, label+100000($t2) | |
| * lwr $t1, ($t2) | |
| * lwr $t1, -100 | |
| * lwr $t1, 100 | |
| * lwr $t1, 100000 | |
| * lwr $t1, 100($t2) | |
| * lwr $t1, 100000($t2) | |
| * lwr $t1, label | |
| * lwr $t1, label($t2) | |
| * lwr $t1, label+100000 | |
| * lwr $t1, label+100000($t2) | |
| * swr $t1, ($t2) | |
| * swr $t1, -100 | |
| * swr $t1, 100 | |
| * swr $t1, 100000 | |
| * swr $t1, 100($t2) | |
| * swr $t1, 100000($t2) | |
| * swr $t1, label | |
| * swr $t1, label($t2) | |
| * swr $t1, label+100000 | |
| * swr $t1, label+100000($t2) | |
| * ll $t1, ($t2) | |
| * ll $t1, -100 | |
| * ll $t1, 100 | |
| * ll $t1, 100000 | |
| * ll $t1, 100($t2) | |
| * ll $t1, 100000($t2) | |
| * ll $t1, label | |
| * ll $t1, label($t2) | |
| * ll $t1, label+100000 | |
| * ll $t1, label+100000($t2) | |
| * sc $t1, ($t2) | |
| * sc $t1, -100 | |
| * sc $t1, 100 | |
| * sc $t1, 100000 | |
| * sc $t1, 100($t2) | |
| * sc $t1, 100000($t2) | |
| * sc $t1, label | |
| * sc $t1, label($t2) | |
| * sc $t1, label+100000 | |
| * sc $t1, label+100000($t2) | |
| * ulw $t1, -100($t2) | |
| * ulh $t1, -100($t2) | |
| * ulhu $t1, -100($t2) | |
| * ld $t1, -100($t2) | |
| * usw $t1, -100($t2) | |
| * ush $t1, -100($t2) | |
| * sd $t1, -100($t2) | |
| * ulw $t1, 100000 | |
| * ulw $t1, label | |
| * ulw $t1, label+100000 | |
| * ulw $t1, ($t2) | |
| * ulw $t1, 100000($t2) | |
| * ulw $t1, label($t2) | |
| * ulw $t1, label+100000($t2) | |
| * ulh $t1, 100000 | |
| * ulh $t1, label | |
| * ulh $t1, label+100000 | |
| * ulh $t1, ($t2) | |
| * ulh $t1, 100000($t2) | |
| * ulh $t1, label($t2) | |
| * ulh $t1, label+100000($t2) | |
| * ulhu $t1, 100000 | |
| * ulhu $t1, label | |
| * ulhu $t1, label+100000 | |
| * ulhu $t1, ($t2) | |
| * ulhu $t1, 100000($t2) | |
| * ulhu $t1, label($t2) | |
| * ulhu $t1, label+100000($t2) | |
| * ld $t1, 100000 | |
| * ld $t1, label | |
| * ld $t1, label+100000 | |
| * ld $t1, ($t2) | |
| * ld $t1, 100000($t2) | |
| * ld $t1, label($t2) | |
| * ld $t1, label+100000($t2) | |
| * usw $t1, 100000 | |
| * usw $t1, label | |
| * usw $t1, label+100000 | |
| * usw $t1, ($t2) | |
| * usw $t1, 100000($t2) | |
| * usw $t1, label($t2) | |
| * usw $t1, label+100000($t2) | |
| * ush $t1, 100000 | |
| * ush $t1, label | |
| * ush $t1, label+100000 | |
| * ush $t1, ($t2) | |
| * ush $t1, 100000($t2) | |
| * ush $t1, label($t2) | |
| * ush $t1, label+100000($t2) | |
| * sd $t1, 100000 | |
| * sd $t1, label | |
| * sd $t1, label+100000 | |
| * sd $t1, ($t2) | |
| * sd $t1, 100000($t2) | |
| * sd $t1, label($t2) | |
| * sd $t1, label+100000($t2) | |
| * lwc1 $f1, ($t2) | |
| * lwc1 $f1, -100 | |
| * lwc1 $f1, 100000 | |
| * lwc1 $f1, 100000($t2) | |
| * lwc1 $f1, label | |
| * lwc1 $f1, label($t2) | |
| * lwc1 $f1, label+100000 | |
| * lwc1 $f1, label+100000($t2) | |
| * ldc1 $f2, ($t2) | |
| * ldc1 $f2, -100 | |
| * ldc1 $f2, 100000 | |
| * ldc1 $f2, 100000($t2) | |
| * ldc1 $f2, label | |
| * ldc1 $f2, label($t2) | |
| * ldc1 $f2, label+100000 | |
| * ldc1 $f2, label+100000($t2) | |
| * swc1 $f1, ($t2) | |
| * swc1 $f1, -100 | |
| * swc1 $f1, 100000 | |
| * swc1 $f1, 100000($t2) | |
| * swc1 $f1, label | |
| * swc1 $f1, label($t2) | |
| * swc1 $f1, label+100000 | |
| * swc1 $f1, label+100000($t2) | |
| * sdc1 $f2, ($t2) | |
| * sdc1 $f2, -100 | |
| * sdc1 $f2, 100000 | |
| * sdc1 $f2, 100000($t2) | |
| * sdc1 $f2, label | |
| * sdc1 $f2, label($t2) | |
| * sdc1 $f2, label+100000 | |
| * sdc1 $f2, label+100000($t2) | |
| * l.s $f1, ($t2) | |
| * l.s $f1, -100 | |
| * l.s $f1, 100000 | |
| * l.s $f1, 100000($t2) | |
| * l.s $f1, label | |
| * l.s $f1, label($t2) | |
| * l.s $f1, label+100000 | |
| * l.s $f1, label+100000($t2) | |
| * s.s $f1, ($t2) | |
| * s.s $f1, -100 | |
| * s.s $f1, 100000 | |
| * s.s $f1, 100000($t2) | |
| * s.s $f1, label | |
| * s.s $f1, label($t2) | |
| * s.s $f1, label+100000 | |
| * s.s $f1, label+100000($t2) | |
| * l.d $f2, ($t2) | |
| * l.d $f2, -100 | |
| * l.d $f2, 100000 | |
| * l.d $f2, 100000($t2) | |
| * l.d $f2, label | |
| * l.d $f2, label($t2) | |
| * l.d $f2, label+100000 | |
| * l.d $f2, label+100000($t2) | |
| * s.d $f2, ($t2) | |
| * s.d $f2, -100 | |
| * s.d $f2, 100000 | |
| * s.d $f2, 100000($t2) | |
| * s.d $f2, label | |
| * s.d $f2, label($t2) | |
| * s.d $f2, label+100000 | |
| * s.d $f2, label+100000($t2) | |
| Directives | |
| ======== | |
| * .data | |
| * .text | |
| * .word | |
| * .ascii | |
| * .asciiz | |
| * .byte | |
| * .align | |
| * .half | |
| * .space | |
| * .double | |
| * .float | |
| * .extern | |
| * .kdata | |
| * .ktext | |
| * .globl | |
| * .set | |
| * .eqv | |
| * .macro | |
| * .end_macro | |
| * .include |
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