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我需要創建一個將整數數組按升序排序的程序。 C中的問題很簡單，並且代碼給了我們。無法在Y86中創建數組循環Assembly
void bubble(int *data, int count)
{
int i, last;
for(last = count‐1; last>0;last‐‐)
{
for(i=0;i<last;i++)
if
(data[i+1] < data[i])
{
/* Swap adjacent elements */
int t=data[i+1];
data[i+1]=data[i];
data[i]=t;
}
}
}
但是當我嘗試落實到組件中，我得到任何
Error on line 90: Invalid line
Line 90, Byte 0x00d0: .comm *data,20,4 //data = memory location
，或者，如果我評論說，線路輸出（我不認爲我應該）我得到這個
Error on line 39: Expecting ')'
Line 39, Byte 0x005a: mrmovl (%edx,%ebx,4),%eax //%eax = data[i]
Error on line 41: Expecting ')'
Line 41, Byte 0x0066: mrmovl 4(%edx,%ebx,4),%edi //%edi = data[i++]
Error on line 46: Expecting ')'
Line 46, Byte 0x0073: mrmovl 4(%edx,%ebx,4),%edi //%edi = data[i++]
Error on line 47: Expecting ')'
Line 47, Byte 0x0079: rmmovl %edi, (%edx,%ebx,4) //data[i] = data[i++]
Error on line 48: Expecting ')'
Line 48, Byte 0x007f: rmmovl %eax, 4(%edx,%ebx,4) //data[i++] = data[i]
以下是我的代碼，因爲它代表：
.pos 0
init: irmovl Stack, %esp //Set up stack pointer
irmovl Stack, %ebp //Set up base pointer
call main //call main program
halt //Terminate program
bubble: pushl %ebp //setup
rrmovl %esp, %ebp
pushl %edx //declaring *data
mrmovl 8(%ebp), %edx
pushl %ecx //declaring count
mrmovl 12(%ebp), %ecx
pushl %ebx //declaring i
pushl %esi //declaring last
pushl %edi
pushl %eax
irmovl $1, %edi //%edi = 1
rrmovl %ecx,%esi //last=count
subl %edi,%esi //last--
L1:
irmovl $0, %edi //%edi = 0
subl %edi,%esi //last -= 0
jle L9 //ends loop if last <= 0
irmovl $0, %ebx //i = 0
L2:
rrmovl %ebx, %edi //%edi = copy of i
subl %esi,%edi //%edi = i-last
jge L8 //ends loop if i >= last
mrmovl (%edx,%ebx,4),%eax //%eax = data[i]
irmovl $1, %edi //%edi = 1
mrmovl 4(%edx,%ebx,4),%edi //%edi = data[i++]
subl %eax,%edi //%edi = data[i++]-data[i]
jge L7 //cancel if statement if data[i++]>=data[i]
mrmovl 4(%edx,%ebx,4),%edi //%edi = data[i++]
rmmovl %edi, (%edx,%ebx,4) //data[i] = data[i++]
rmmovl %eax, 4(%edx,%ebx,4) //data[i++] = data[i]
L7:
irmovl $1, %edi //%edi = 1
addl %edi,%ebx //i++
jmp L2 //go to beginning of loop
L8:
irmovl $1, %edi //%edi = 1
subl %edi,%esi //last--
jmp L1
L9:
popl %ebx //finish
popl %esi
popl %edi
popl %eax
popl %ebp
ret
main: pushl %ebp //setup
rrmovl %esp, %ebp
pushl %ebx //declaring *data
mrmovl data, %ebx
pushl %esi //declaring count
mrmovl count, %esi
rmmovl %ebx, (%esp) //move data to be used by bubble
rmmovl %esi, 4(%esp) //move count to be used by bubble
call bubble
popl %ebx //finish
popl %esi
popl %ebp
ret
.comm data,20,4 //data = memory location
.align 4
count: .long 5 //count = memory location
data: .long 2 //data array assignment
.long 1
.long 3
.long 5
.long 4
.pos 0x200
Stack: .long 0