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Diffstat (limited to 'runtime/powerpc64/i64_utod.s')
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1 files changed, 0 insertions, 79 deletions
diff --git a/runtime/powerpc64/i64_utod.s b/runtime/powerpc64/i64_utod.s deleted file mode 100644 index 491ee26b..00000000 --- a/runtime/powerpc64/i64_utod.s +++ /dev/null @@ -1,79 +0,0 @@ -# ***************************************************************** -# -# The Compcert verified compiler -# -# Xavier Leroy, INRIA Paris-Rocquencourt -# -# Copyright (c) 2013 Institut National de Recherche en Informatique et -# en Automatique. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# * Neither the name of the <organization> nor the -# names of its contributors may be used to endorse or promote products -# derived from this software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT -# HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -# -# ********************************************************************* - -# Helper functions for 64-bit integer arithmetic. PowerPC 64 version. - - .text - -### Conversion from unsigned long to double float - - .balign 16 - .globl __compcert_i64_utod -__compcert_i64_utod: - rldicl r3, r3, 0, 32 # clear top 32 bits - rldicl r4, r4, 0, 32 # clear top 32 bits - lis r5, 0x4f80 # 0x4f80_0000 = 2^32 in binary32 format - stdu r3, -32(r1) - std r4, 8(r1) - stw r5, 16(r1) - lfd f1, 0(r1) # high 32 bits of argument - lfd f2, 8(r1) # low 32 bits of argument - lfs f3, 16(r1) # 2^32 - fcfid f1, f1 # convert both 32-bit halves to FP (exactly) - fcfid f2, f2 - fmadd f1, f1, f3, f2 # compute hi * 2^32 + lo - addi r1, r1, 32 - blr - .type __compcert_i64_utod, @function - .size __compcert_i64_utod, .-__compcert_i64_utod - -# Alternate implementation using round-to-odd: -# rldimi r4, r3, 32, 0 # reassemble (r3,r4) as a 64-bit integer in r4 -# cmpdi r4, 0 # is r4 >= 2^63 ? -# blt 1f -# stdu r4, -16(r1) # r4 < 2^63: convert as signed -# lfd f1, 0(r1) -# fcfid f1, f1 -# addi r1, r1, 16 -# blr -#1: rldicl r0, r4, 0, 63 # extract low bit of r4 -# srdi r4, r4, 1 -# or r4, r4, r0 # round r4 to 63 bits, using round-to-odd -# stdu r4, -16(r1) # convert to binary64 -# lfd f1, 0(r1) -# fcfid f1, f1 -# fadd f1, f1, f1 # multiply result by 2 -# addi r1, r1, 16 -# blr -
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