# *****************************************************************
#
#               The Compcert verified compiler
#
#           Xavier Leroy, INRIA Paris-Rocquencourt
#
# Copyright (c) 2013 Institut National de Recherche en Informatique et
#  en Automatique.
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# Helper functions for 64-bit integer arithmetic.  IA32 version.
	
        .text

# Shift right unsigned

# Note: IA32 shift instructions treat their amount (in %cl) modulo 32

        .globl __i64_shr
        .balign 16
__i64_shr:
        movl 12(%esp), %ecx             # ecx = shift amount, treated mod 64
        testb $32, %cl
        jne 1f
  # shift amount < 32
        movl 4(%esp), %eax
        movl 8(%esp), %edx
        shrdl %cl, %edx, %eax           # eax = low(XH:XL >> amount)
        shrl %cl, %edx                  # edx = XH >> amount
        ret
  # shift amount >= 32
1:      movl 8(%esp), %eax
        shrl %cl, %eax                  # eax = XH >> (amount - 32)
        xorl %edx, %edx                 # edx = 0
        ret
        .type __i64_shr, @function
        .size __i64_shr, . - __i64_shr