Assembler integer logarithm

ilog.S

# unsigned int ilog(unsigned int value, unsigned int base);
# (c) 2018 by Heiko Schaefer

.section .text
.globl ilog
.type ilog, @function

ilog:
pushl %ebp
movl %esp, %ebp
movl 8(%ebp),%ebx  # value
movl 12(%ebp),%ecx # base
movl %ebx, %eax
xorl %ebx, %ebx

0:
cmpl %ecx,%eax
jb 1f
cdq
divl %ecx
incl %ebx
cmpl $0x01,%eax
ja 0b

1:
movl %ebx,%eax
movl %ebp, %esp
popl %ebp
ret