loongarch64: fix assembly warnings

arch/loongarch64/makecontext.S

@@ -36,8 +36,8 @@ FUNC(libucontext_makecontext)
 	st.d	$a7, $sp, A7_OFF
 
 	/* set $zero in the mcontext to 1. */
-	addi.d	$v0, $zero, 1
-	st.d	$v0, $t5, REG_OFFSET(0)
+	addi.d	$a0, $zero, 1
+	st.d	$a0, $t5, REG_OFFSET(0)
 
 	/* ensure the stack is aligned on a quad-word boundary. */
 	ld.d	$t0, $t5, UCONTEXT_STACK_PTR
@@ -59,9 +59,9 @@ FUNC(libucontext_makecontext)
 
 store_register_arg:
 	addi.d	$t3, $t3, 1
-	ld.d	$v1, $t1, 0
+	ld.d	$a1, $t1, 0
 	addi.d	$t1, $t1, REG_SZ
-	st.d	$v1, $t2, 0
+	st.d	$a1, $t2, 0
 	addi.d	$t2, $t2, REG_SZ
 	addi.d	$t6, $zero, 8
 	bltu	$t3, $t6, store_register_arg
@@ -83,9 +83,9 @@ store_register_arg:
 
 store_stack_arg:
 	addi.d	$t3, $t3, 1
-	ld.d	$v1, $t1, 0
+	ld.d	$a1, $t1, 0
 	addi.d	$t1, $t1, REG_SZ
-	st.d	$v1, $t2, 0
+	st.d	$a1, $t2, 0
 	addi.d	$t2, $t2, REG_SZ
 	bltu	$t3, $a2, store_stack_arg
 
@@ -93,8 +93,8 @@ no_more_arguments:
 	/* trampoline setup. */
 	la.got	$t8, libucontext_trampoline
 
-	ld.d	$v1, $t5, UCONTEXT_UC_LINK
-	st.d	$v1, $t5, REG_OFFSET(23)
+	ld.d	$a1, $t5, UCONTEXT_UC_LINK
+	st.d	$a1, $t5, REG_OFFSET(23)
 
 	st.d	$t0, $t5, REG_OFFSET(3)
 

arch/loongarch64/setcontext.S

@@ -49,7 +49,7 @@ FUNC(libucontext_setcontext)
 	ld.d	$t8, $t5, (MCONTEXT_PC)
 
 	jr	$t8
-	move	$v0, $zero
+	move	$a0, $zero
 
 	POP_FRAME(libucontext_setcontext)
 END(libucontext_setcontext)

arch/loongarch64/swapcontext.S

@@ -77,7 +77,7 @@ FUNC(libucontext_swapcontext)
 	ld.d	$t8, $t4, (MCONTEXT_PC)
 
 	jr	$t8
-	move	$v0, $zero
+	move	$a0, $zero
 
 fail:
 	la.global	$t8, exit
@@ -85,5 +85,5 @@ fail:
 	POP_FRAME(libucontext_swapcontext)
 
 	jirl	$ra, $t8, 0
-	move	$v0, $zero
+	move	$a0, $zero
 END(libucontext_swapcontext)