From 692a2e827bb9ddabbf877bea6af0d2b4656651bb Mon Sep 17 00:00:00 2001
From: "Michael R. Crusoe" <michael.crusoe@gmail.com>
Date: Mon, 13 Nov 2023 10:21:25 +0100
Subject: [PATCH] sse2 mm_pause: more archs, add a basic test

---
 simde/x86/sse2.h | 18 ++++++++++++++++++
 test/x86/sse2.c  |  8 ++++++++
 2 files changed, 26 insertions(+)

diff --git a/simde/x86/sse2.h b/simde/x86/sse2.h
index 96a8163b6..024fe26ac 100644
--- a/simde/x86/sse2.h
+++ b/simde/x86/sse2.h
@@ -4770,6 +4770,24 @@ void
 simde_mm_pause (void) {
   #if defined(SIMDE_X86_SSE2_NATIVE)
     _mm_pause();
+  #elif defined(SIMDE_ARCH_X86)
+    __asm__ __volatile__("pause");
+  #elif defined(SIMDE_ARCH_ARM_NEON)
+    #if defined(_MSC_VER)
+      __isb(_ARM64_BARRIER_SY);
+    #else
+      __asm__ __volatile__("isb\n");
+    #endif
+  #elif defined(SIMDE_ARCH_POWER)
+    __asm__ __volatile__ ("or 27,27,27" ::: "memory");
+  #elif defined(SIMDE_ARCH_WASM)
+    __asm__ __volatile__ ("nop");
+  #elif defined(HEDLEY_GCC_VERSION)
+    #if defined(SIMDE_ARCH_RISCV)
+      __builtin_riscv_pause();
+    #else
+      __asm__ __volatile__ ("nop" ::: "memory");
+    #endif
   #endif
 }
 #if defined(SIMDE_X86_SSE2_ENABLE_NATIVE_ALIASES)
diff --git a/test/x86/sse2.c b/test/x86/sse2.c
index 085a74d9a..ae44eaf91 100644
--- a/test/x86/sse2.c
+++ b/test/x86/sse2.c
@@ -6142,6 +6142,12 @@ test_simde_mm_packus_epi16(SIMDE_MUNIT_TEST_ARGS) {
   return 0;
 }
 
+static int
+test_simde_mm_pause(SIMDE_MUNIT_TEST_ARGS) {
+  simde_mm_pause();
+  return 0;
+}
+
 static int
 test_simde_mm_sad_epu8(SIMDE_MUNIT_TEST_ARGS) {
   const struct {
@@ -10687,6 +10693,8 @@ SIMDE_TEST_FUNC_LIST_BEGIN
   SIMDE_TEST_FUNC_LIST_ENTRY(mm_packs_epi32)
   SIMDE_TEST_FUNC_LIST_ENTRY(mm_packus_epi16)
 
+  SIMDE_TEST_FUNC_LIST_ENTRY(mm_pause)
+
   SIMDE_TEST_FUNC_LIST_ENTRY(mm_undefined_pd)
   SIMDE_TEST_FUNC_LIST_ENTRY(mm_undefined_si128)