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# Copyright 2022 Gabriel Jensen.
# This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
# If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
.globl zap_memfill
zap_memfill:
# rdi: Address of the current element.
# rsi: Address of the element after the last element.
# rdx: Byte value.
addq %rdi,%rsi
# Iterate over buffer:
.loop:
# Check if we have reached the final element:
cmpq %rdi,%rsi
je .done # Exit loop if we have.
# Set the value of the current element:
movb %dl,(%rdi)
# Continue to next element:
incq %rdi
jmp .loop
# Finish:
.done:
ret
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