Changes in boot/arch/mips32/src/asm.S [a2da43c:4872160] in mainline

File:

• boot/arch/mips32/src/asm.S (modified) (2 diffs)

boot/arch/mips32/src/asm.S

@@ -36 +36 @@
 .global start
 .global halt
+.global memcpy
 .global jump_to_kernel
 
@@ -125 +126 @@
         j halt
         nop
+
+memcpy:
+        addiu $v0, $a1, 3
+        li $v1, -4
+        and $v0, $v0, $v1
+        beq $a1, $v0, 3f
+        move $t0, $a0
+        move $t2, $a0
+        
+        0:
+                beq $a2, $zero, 2f
+                move $a3, $zero
+        
+        1:
+                addu $v0, $a1, $a3
+                lbu $a0, 0($v0)
+                addu $v1, $t0, $a3
+                addiu $a3, $a3, 1
+                bne $a3, $a2, 1b
+                sb $a0, 0($v1)
+        
+        2:
+                jr $ra
+                move $v0, $t2
+        
+        3:
+                addiu $v0, $a0, 3
+                and $v0, $v0, $v1
+                bne $a0, $v0, 0b
+                srl $t1, $a2, 2
+                
+                beq $t1, $zero, 5f
+                move $a3, $zero
+                
+                move $a3, $zero
+                move $a0, $zero
+        
+        4:
+                addu $v0, $a1, $a0
+                lw $v1, 0($v0)
+                addiu $a3, $a3, 1
+                addu $v0, $t0, $a0
+                sw $v1, 0($v0)
+                bne $a3, $t1, 4b
+                addiu $a0, $a0, 4
+        
+        5:
+                andi $a2, $a2, 0x3
+                beq $a2, $zero, 2b
+                nop
+                
+                sll $v0, $a3, 2
+                addu $t1, $v0, $t0
+                move $a3, $zero
+                addu $t0, $v0, $a1
+        
+        6:
+                addu $v0, $t0, $a3
+                lbu $a0, 0($v0)
+                addu $v1, $t1, $a3
+                addiu $a3, $a3, 1
+                bne $a3, $a2, 6b
+                sb $a0, 0($v1)
+                
+                jr $ra
+                move $v0, $t2
 
 jump_to_kernel: