micropython/stm/gchelper.s
2013-11-03 14:53:34 +00:00

37 lines
903 B
ArmAsm

.syntax unified
.cpu cortex-m4
.thumb
.text
.align 2
@ void gc_helper_get_regs_and_clean_stack(r0=uint regs[10], r1=heap_end)
.global gc_helper_get_regs_and_clean_stack
.thumb
.thumb_func
.type gc_helper_get_regs_and_clean_stack, %function
gc_helper_get_regs_and_clean_stack:
@ store registers into given array
str r4, [r0], #4
str r5, [r0], #4
str r6, [r0], #4
str r7, [r0], #4
str r8, [r0], #4
str r9, [r0], #4
str r10, [r0], #4
str r11, [r0], #4
str r12, [r0], #4
str r13, [r0], #4
@ clean the stack from given pointer up to current sp
movs r0, #0
mov r2, sp
b.n .entry
.loop:
str r0, [r1], #4
.entry:
cmp r1, r2
bcc.n .loop
bx lr
.size gc_helper_get_regs_and_clean_stack, .-gc_helper_get_regs_and_clean_stack