# *****************************************************************
#
#               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.  PowerPC version.

        .text

# Shift right signed	
	
        .balign 16
        .globl __i64_sar
__i64_sar:
        andi. r5, r5, 63        # take amount modulo 64
        cmpwi r5, 32
        bge 1f                  # amount < 32?
        subfic r6, r5, 32       # r6 = 32 - amount
        srw r4, r4, r5          # RH = XH >>s amount
        slw r0, r3, r6          # RL = XL >>u amount | XH << (32 - amount)
        or r4, r4, r0
        sraw r3, r3, r5
        blr
1:      addi r6, r5, -32        # amount >= 32
        sraw r4, r3, r6         # RL = XH >>s (amount - 32)
        srawi r3, r3, 31        # RL = sign extension of XH
        blr
        .type __i64_sar, @function
        .size __i64_sar, .-__i64_sar