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Modifications to compile code for WINDOWS ARM and ARM64 (#4003)

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* Modifications to compile code for WINDOWS ARM and ARM64

[why]
In order to compile ZMQ related software on WINDOWS ARM

[how]
Replaced code in the file clock.cpp around the line 240.
Added intrinsics for ARM to replace '__rdtsc'

[todo]
Find proper tick counter query for ARM64 (see file:clock.cpp,line:~250)

* RELICENSEing

[why]
To make usage of changed code properly usable by libzmq project team

[how]
Added file /RELICENSE/kalantar.md with necessary information
This commit is contained in:
Davit Kalantaryan 2020-08-06 18:41:15 +02:00 committed by GitHub
parent 22e37933b3
commit 0a424486a0
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15
RELICENSE/kalantar.md Normal file
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@ -0,0 +1,15 @@
# Permission to Relicense under MPLv2 or any other OSI approved license chosen by the current ZeroMQ BDFL
This is a statement by Davit Kalantaryan
that grants permission to relicense its copyrights in the libzmq C++
library (ZeroMQ) under the Mozilla Public License v2 (MPLv2) or any other
Open Source Initiative approved license chosen by the current ZeroMQ
BDFL (Benevolent Dictator for Life).
A portion of the commits made with commit author
"Davit Kalantaryan <davit.kalantaryan@desy.de>", are copyright of Davit Kalantaryan.
This document hereby grants the libzmq project team to relicense libzmq,
including all past, present and future contributions of the author listed above.
Davit Kalantaryan
2020/08/06

11
src/clock.cpp
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@ -41,6 +41,9 @@
#include <cmnintrin.h>
#else
#include <intrin.h>
#if defined(_M_ARM) || defined(_M_ARM64)
#include <arm_neon.h>
#endif
#endif
#endif
@ -235,6 +238,14 @@ uint64_t zmq::clock_t::rdtsc ()
{
#if (defined _MSC_VER && (defined _M_IX86 || defined _M_X64))
return __rdtsc ();
#elif defined(_MSC_VER) && defined(_M_ARM) // NC => added for windows ARM
return __rdpmccntr64 ();
#elif defined(_MSC_VER) && defined(_M_ARM64) // NC => added for windows ARM64
//return __rdpmccntr64 ();
//return __rdtscp (nullptr);
// todo: find proper implementation for ARM64
static uint64_t snCounter = 0;
return ++snCounter;
#elif (defined __GNUC__ && (defined __i386__ || defined __x86_64__))
uint32_t low, high;
__asm__ volatile("rdtsc" : "=a"(low), "=d"(high));