From b27a92c881022cb375697475cdccf3302b658334 Mon Sep 17 00:00:00 2001
From: Pavel Zenov <9086704+linuxoidmc@users.noreply.github.com>
Date: Sun, 4 Apr 2021 22:33:39 +0300
Subject: [PATCH] Initial support for Apple ARM64

---
 Sources/CMakeLists.txt                     |  4 ++--
 Sources/Engine/Models/RenderModel_View.cpp |  2 +-
 Sources/Engine/World/WorldRayCasting.cpp   |  2 +-
 Sources/build-macarm.sh                    | 14 ++++++++++++++
 4 files changed, 18 insertions(+), 4 deletions(-)
 create mode 100755 Sources/build-macarm.sh

diff --git a/Sources/CMakeLists.txt b/Sources/CMakeLists.txt
index 50a60db..5315602 100755
--- a/Sources/CMakeLists.txt
+++ b/Sources/CMakeLists.txt
@@ -101,13 +101,13 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 	add_compile_options(-Wall)
 	add_compile_options(-pipe)
 	add_compile_options(-fPIC)
-	if(NOT PANDORA AND NOT PYRA)
+	if(NOT PANDORA AND NOT PYRA AND NOT (MACOSX AND CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"))
 		add_compile_options(-march=native)
 	endif()
 	if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm.*")
 		if(PYRA)
 		add_compile_options(-mfpu=neon-vfpv4)
-		else()
+		elseif(NOT (MACOSX AND CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"))
 		add_compile_options(-mfpu=neon)
 		endif()
 	endif()
diff --git a/Sources/Engine/Models/RenderModel_View.cpp b/Sources/Engine/Models/RenderModel_View.cpp
index 1038ca8..35fba13 100755
--- a/Sources/Engine/Models/RenderModel_View.cpp
+++ b/Sources/Engine/Models/RenderModel_View.cpp
@@ -2106,7 +2106,7 @@ vtxRest:
 vtxEnd:
       pop     ebx
     }
-#elif defined(__ARM_NEON__)
+#elif defined(__ARM_NEON__) && !defined (PLATFORM_MACOSX)
     register float tc_u __asm__("s0") = fTexCorrU;
     register float tc_v __asm__("s1") = fTexCorrV;
     const void *tc_src = pvTexCoord->vector;
diff --git a/Sources/Engine/World/WorldRayCasting.cpp b/Sources/Engine/World/WorldRayCasting.cpp
index e100d4b..3c158e9 100644
--- a/Sources/Engine/World/WorldRayCasting.cpp
+++ b/Sources/Engine/World/WorldRayCasting.cpp
@@ -512,7 +512,7 @@ void CCastRay::TestBrushSector(CBrushSector *pbscSector)
         continue;
       }
     }
-#ifdef __ARM_NEON__
+#if defined __ARM_NEON__ && !defined PLATFORM_MACOSX
     // get distances of ray points from the polygon plane
     register FLOAT fDistance0 __asm__("s0") = bpoPolygon.bpo_pbplPlane->bpl_plAbsolute.PointDistance(cr_vOrigin);
     register FLOAT fDistance1 __asm__("s2") = bpoPolygon.bpo_pbplPlane->bpl_plAbsolute.PointDistance(cr_vTarget);
diff --git a/Sources/build-macarm.sh b/Sources/build-macarm.sh
new file mode 100755
index 0000000..8c4ebee
--- /dev/null
+++ b/Sources/build-macarm.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+NCPU=`sysctl -n hw.ncpu`
+echo "Will build with 'make -j$NCPU' ... please edit this script if incorrect."
+
+set -e
+set -x
+
+rm -rf cmake-build
+mkdir $_
+cd $_
+cmake -DCMAKE_BUILD_TYPE=RelWithDbgInfo -DCMAKE_OSX_ARCHITECTURES=arm64 .. $1
+make -j$NCPU
+