From 78142e30cccf5420d3f190ab595cce2e2ff5e489 Mon Sep 17 00:00:00 2001
From: Shawn Hoffman <godisgovernment@gmail.com>
Date: Tue, 2 Aug 2022 23:05:07 -0700
Subject: [PATCH] crypto/sha1: simplify enablement of sha insns on non-msvc

---
 Source/Core/Common/CMakeLists.txt  |  1 +
 Source/Core/Common/Crypto/SHA1.cpp | 24 ++----------------------
 2 files changed, 3 insertions(+), 22 deletions(-)

diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index f9e5109d17..8cf550a886 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -139,6 +139,7 @@ add_library(common
 if(NOT MSVC AND _M_ARM_64)
   set_source_files_properties(
     Crypto/AES.cpp
+    Crypto/SHA1.cpp
     PROPERTIES COMPILE_FLAGS "-march=armv8-a+crypto")
 endif()
 
diff --git a/Source/Core/Common/Crypto/SHA1.cpp b/Source/Core/Common/Crypto/SHA1.cpp
index 9789818f13..7dfbb1f0c0 100644
--- a/Source/Core/Common/Crypto/SHA1.cpp
+++ b/Source/Core/Common/Crypto/SHA1.cpp
@@ -19,14 +19,6 @@
 #ifdef _M_X86_64
 #include <immintrin.h>
 #elif defined(_M_ARM_64)
-#if defined(__clang__)
-// This is a bit of a hack to get clang to accept the sha1 intrinsics without modifying cmdline
-// flags. Note __ARM_FEATURE_CRYPTO is deprecated and "SHA2" flag is the lowest one which includes
-// SHA1.
-#define __ARM_FEATURE_SHA2
-// ...needed for older clang before they made the switchover to more granular flags.
-#define __ARM_FEATURE_CRYPTO
-#endif
 #include <arm_acle.h>
 #include <arm_neon.h>
 #endif
@@ -256,17 +248,6 @@ private:
 
 #ifdef _M_ARM_64
 
-// The armv8 flags are very annoying:
-// clang inserts "+" prefixes itself, gcc does not.
-// clang has deprecated "crypto" (removed in clang 13), gcc has not.
-#ifdef _MSC_VER
-#define TARGET_ARMV8_SHA1
-#elif defined(__clang__)
-#define TARGET_ARMV8_SHA1 [[gnu::target("sha2")]]
-#elif defined(__GNUC__)
-#define TARGET_ARMV8_SHA1 [[gnu::target("+crypto")]]
-#endif
-
 class ContextNeon final : public BlockContext
 {
 public:
@@ -287,7 +268,6 @@ private:
     u32 e{};
   };
 
-  TARGET_ARMV8_SHA1
   static inline uint32x4_t MsgSchedule(WorkBlock* wblock, size_t i)
   {
     auto& w = *wblock;
@@ -299,7 +279,7 @@ private:
   }
 
   template <size_t Func>
-  TARGET_ARMV8_SHA1 static inline constexpr uint32x4_t f(State state, uint32x4_t w)
+  static inline constexpr uint32x4_t f(State state, uint32x4_t w)
   {
     const auto wk = vaddq_u32(w, vdupq_n_u32(K[Func]));
     if constexpr (Func == 0)
@@ -311,7 +291,7 @@ private:
   }
 
   template <size_t Func>
-  TARGET_ARMV8_SHA1 static inline constexpr State FourRounds(State state, uint32x4_t w)
+  static inline constexpr State FourRounds(State state, uint32x4_t w)
   {
 #ifdef _MSC_VER
     // FIXME it seems the msvc optimizer gets a little too happy