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miti99
2018-11-19 10:28:02 +07:00
parent 101c324a6c
commit 759e5ba0ee
1 changed files with 32 additions and 31 deletions
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Assignment/Assignment1.asm
+32 -31
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@@ -1,8 +1,7 @@
#Chuong trinh chia 2 so thuc
#Input: 2 so thuc nhap vao tu ban phim
#Output: Neu so chia hoac so bi chia khong hop le (NaN)
# Trong truong hop so bi chia bang cong/tru vo cuc (Infinity) thi bao loi
# Trong truong hop so chia bang 0.0 (hoac -0.0) thi bao loi
#Output: Neu so chia hoac so bi chia khong hop le (NaN) thi ket qua la NaN
# Trong truong hop so chia va so bi chia cung bang vo cuc hoac cung bang 0 thi ket qua la NaN
# Cac truong hop con lai xuat gia tri thuong cua 2 so thuc da nhap (trong tam bieu dien cua kieu float)
# Trong truong hop tri tuyet doi cua thuong >= 2^128 thi ket qua la vo cuc (Infinity)
# Trong truong hop tri tuyet doi cua thuong <= 2^-127 thi ket qua la 0
@@ -15,9 +14,6 @@ f: .space 8 #O nho luu ket qua (Thuong cua 2 so)
#Cau nhac lenh:
in1: .asciiz "Nhap vao so bi chia:\n"
in2: .asciiz "Nhap vao so chia:\n"
err: .asciiz "So da nhap khong hop le!"
err1: .asciiz "So bi chia bang vo cuc!"
err2: .asciiz "So chia bang 0!"
out: .asciiz "Thuong cua hai so da nhap la:\n"
#Code:
@@ -46,14 +42,8 @@ main:
lw $a1, f1
lw $a2, f2
#Kiem tra 2 so da nhap co hop le hay khong (= NaN)
beq $a1, 0x7FC00000, error
beq $a2, 0x7FC00000, error
#Kiem tra so bi chia co bang cong/tru vo cuc (Infinity) hay khong
beq $a1, 0x7F800000, error1
beq $a2, 0xFF800000, error1
#Kiem tra so chia co bang 0.0 hoac -0.0 hay khong
beqz $a2, error2
beq $a2, 0x80000000, error2
beq $a1, 0x7FC00000, case1
beq $a2, 0x7FC00000, case1
#Xu ly bit dau cua f:
#Luu bit dau cua f1, f2 vao $t1, $t2
@@ -66,6 +56,16 @@ main:
#Luu bit dau cua f vao $t0
xor $t0, $t1, $t2
#Kiem tra so bi chia co bang cong/tru vo cuc (Infinity) hay khong
beq $a1, 0x7F800000, excep1
beq $a1, 0xFF800000, excep1
#Kiem tra so chia co bang 0.0 hoac -0.0 hay khong
beqz $a2, excep2
beq $a2, 0x80000000, excep2
#Kiem tra so chia co bang vo cuc hay khong
beq $a2, 0x7F800000, case2
beq $a2, 0xFF800000, case2
#Xu ly cac bit mu cua f:
#Luu cac bit mu cua f1, f2 vao $t2, $t3
andi $t2, $a1, 0x7F800000
@@ -130,24 +130,25 @@ exit: li $v0, 10
syscall
#Xu ly ngoai le trong chuong trinh
#Loi: so nhap khong hop le (NaN)
error: la $a0, err
li $v0, 4
syscall
j exit
#Loi: so bi chia bang vo cuc
error1: la $a0, err1
li $v0, 4
syscall
j exit
#Loi: so chia bang 0
error2: la $a0, err2
li $v0, 4
syscall
j exit
#Truong hop tri tuyet doi thuong <= 2^-127
case2: li $v0, 0x0
#Ngoai le: so bi chia bang vo cuc
excep1: beq $a2, 0x7F800000, case1
beq $a2, 0xFF800000, case1
j case3
#Ngoai le: so chia bang 0
excep2: beqz $a1, case1
beq $a1, 0xF0000000, case1
j case3
#Truong hop thuong mang gia tri khong hop le
case1: li $v0, 0x7FC00000
j save
#Truong hop tri tuyet doi thuong <= 2^-127
case2: li $t1, 0x0
li $t2, 0x0
j comb
#Truong hop tri tuyet doi thuong >= 2^128
case3: li $t1, 0xFF
li $t2, 0x0