URL https://opencores.org/ocsvn/mips_16/mips_16/trunk

Subversion Repositories mips_16

[/] [mips_16/] [trunk/] [bench/] [mips_16_core_top/] [test2.asm] - Blame information for rev 2

Line No.	Rev	Author	Line
1	2	Doyya	`;multiply R3=R1*R2 using add and shift instructions`
2			`; R1: number 1`
3			`; R2: number 2`
4			`; R3: ACC`
5			`; R4: masked R2`
6			`; R5: 16`
7			`; R6: mask, {15'b0,1'b1}`
8			`; R7: conuter`
9
10			`ADDI R1,R0,28`
11			`ADDI R2,R0,17`
12			`ADDI R6,R0,1`
13			`ADDI R7,R0,0`
14			`ADDI R5,R0,16 ;R5=16`
15			`L1: ADDI R7,R7,1 ;R7++`
16			`AND R4,R6,R2`
17			`BZ R4,L2 ;dont need add, skip`
18			`NOP`
19			`ADD R3,R3,R1 ;accumulate`
20			`L2: SL R1,R1,R6 ;R1=R1<<1`
21			`SRU R2,R2,R6 ;R2=R2>>1`
22			`SUB R4,R5,R7 ;R4=R5-R7`
23			`BZ R4,L3 ;shift over, go to stop`
24			`NOP`
25			`BZ R0,L1 ;continue`
26			`NOP`
27			`L3: BZ R0,L3 ;stop here`
28			`NOP`
29