CO_Exp6

gistfile1.txt

nor     $1, $0, $0;         #$1 = ~ ($0 | $0) = FFFF_FFFF
sltu    $2, $0, $1;         #$2 = $0 < $1 ? 1 : 0 = 0000_0001
add     $3, $2, $2;         #$3 = $2 + $2 = 0000_0002
add     $4, $3, $2;         #$4 = $3 + $2 = 0000_0003 
add     $5, $4, $3;         #$5 = $4 + $3 = 0000_0005 
add     $6, $5, $3;         #$6 = $5 + $3 = 0000_0007
sllv    $7, $6, $2;         #$7 = $6 << $2 = 0000_000E
add     $9, $5, $6;         #$9 = $5 + $6 = 0000_000C
sllv    $8, $6, $9;         #$8 = $6 << $9 = 0000_7000 
xor     $9, $1, $8;         #$9 = $1 ^ $8 = FFFF_8FFF  
add     $10,$9, $1;         #$10= $9 + $1 = FFFF_8FFE  
sub     $11,$8, $7;         #$11= $8 - $7 = 0000_6FF2  
sub     $12,$7,$8;          #$12= $7 - $8 = FFFF_900E  
and     $13,$9,$12;         #$13= &9 & $12 = FFFF_800E
or      $14,$9,$12;         #$14= $9 | $12 = FFFF_9FFF  
or      $15,$6,$7;          #$15= $6 | $7 = 0000_000F  
nor     $16,$6,$7;          #$16= ~($6 | $7) = FFFF_FFF0  
add     $17,$7,$3;          #$17= $7 + $3 = 0000_0010  
sllv    $18,$8,$17;         #$18= $8 << $17 = 7000_0000  
sllv    $19,$3,$17;         #$19= $3 << $17 = 0002_0000  
sllv    $20,$19,$7;         #$20= $19 << $7 = 8000_0000  
sub     $21,$20,$1;         #$21= $20 - $1 = 8000_0001,  相减结果为负，保留数值位  
or      $22,$18,$21;        #$22= $18 | $21 = f000_0001  
add     $23,$20,$22;        #$23= $20 + $22 = ERROR， 相加溢出
sub     $24,$20,$22;        #$24= $20 - $22   
sub     $25,$22,$20;        #$25= $22 - $20
xor     $26,$18,$1;         #$26= 8FFF_FFFF  
sltu    $27,$22,$20;        #$27= 0000_0001  
sltu    $28,$26,$20;        #$28= 0000_0000  
add     $29,$22,$2;         #$29= 8000_0000 
sub     $30,$20,$2;         #$30= 7FFF_FFFF  
add     $31,$11,$26;        #$30= 9000_6FF1