# *****************************************************************
#
#               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

### Conversion from unsigned long to double float	

        .balign 16
        .globl __i64_utod
__i64_utod:
        addi r1, r1, -16
        lis r5, 0x4330
        li r6, 0
        stw r5, 0(r1)
        stw r4, 4(r1)           # 0(r1) = 2^52 + (double) XL
        stw r5, 8(r1)
        stw r6, 12(r1)          # 8(r1) = 2^52
        lfd f1, 0(r1)
        lfd f2, 8(r1)
        fsub f1, f1, f2         # f1 is (double) XL
        lis r5, 0x4530
        stw r5, 0(r1)           # 0(r1) = 2^84 + (double) XH * 2^32
        stw r3, 4(r1)
        stw r5, 8(r1)           # 8(r1) = 2^84
        lfd f2, 0(r1)
        lfd f3, 8(r1)
        fsub f2, f2, f3         # f2 is XH * 2^32 as a double
        fadd f1, f1, f2         # add both to get result
        addi r1, r1, 16
        blr
        .type __i64_utod, @function
        .size __i64_utod, .-__i64_utod