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| author | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2016-10-27 16:26:08 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-10-27 16:26:08 +0200 |
| commit | 9922feea537ced718a3822dd50eabc87da060338 (patch) | |
| tree | 6f67bb6707ef59e50d6bb81c61b2ed0b3c6097ab /runtime/powerpc/i64_umulh.s | |
| parent | f2d6637c7d4a11f961ff289e64f70bf4de93d0aa (diff) | |
| parent | d50773e537ec6729f9152b545c6f938ab19eb7b8 (diff) | |
| download | compcert-9922feea537ced718a3822dd50eabc87da060338.tar.gz compcert-9922feea537ced718a3822dd50eabc87da060338.zip | |
Merge pull request #145 from AbsInt/64
Support for 64-bit target processors + support for x86 in 64-bit mode
Diffstat (limited to 'runtime/powerpc/i64_umulh.s')
| -rw-r--r-- | runtime/powerpc/i64_umulh.s | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/runtime/powerpc/i64_umulh.s b/runtime/powerpc/i64_umulh.s new file mode 100644 index 00000000..1c609466 --- /dev/null +++ b/runtime/powerpc/i64_umulh.s @@ -0,0 +1,65 @@ +# ***************************************************************** +# +# The Compcert verified compiler +# +# Xavier Leroy, INRIA Paris +# +# Copyright (c) 2016 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 version. + + .text + +### Unsigned multiply-high + +# X * Y = 2^64 XH.YH + 2^32 (XH.YL + XL.YH) + XL.YL + + .balign 16 + .globl __i64_umulh +__i64_umulh: +# r7:r8:r9 accumulate bits 127:32 of the full product + mulhwu r9, r4, r6 # r9 = high half of XL.YL + mullw r0, r4, r5 # r0 = low half of XL.YH + addc r9, r9, r0 + mulhwu r0, r4, r5 # r0 = high half of XL.YH + addze r8, r0 + mullw r0, r3, r6 # r0 = low half of XH.YL + addc r9, r9, r0 + mulhwu r0, r3, r6 # r0 = high half of XH.YL + adde r8, r8, r0 + li r7, 0 + addze r7, r7 + mullw r0, r3, r5 # r0 = low half of XH.YH + addc r4, r8, r0 + mulhwu r0, r3, r5 # r0 = high half of XH.YH + adde r3, r7, r0 + blr + .type __i64_umulh, @function + .size __i64_umulh, .-__i64_umulh + |