From 9887f1f144f4ab55524581caa4c8770fdef7f8e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E9=98=B3?= <657837019@qq.com>
Date: Wed, 10 Jun 2026 02:20:18 +0800
Subject: [PATCH 1/2] Add generic RISC-V build path

---
 CMakeLists.txt  | 4 ++++
 blosc/shuffle.c | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fac75f5f..197a92a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,6 +250,10 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "(i386|i686|x86_64|amd64|AMD64)")
         # Unrecognized compiler. Emit a warning message to let the user know hardware-acceleration won't be available.
         message(WARNING "Unable to determine which ${CMAKE_SYSTEM_PROCESSOR} hardware features are supported by the C compiler (${CMAKE_C_COMPILER_ID} ${CMAKE_C_COMPILER_VERSION}).")
     endif()
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "riscv")
+    set(COMPILER_SUPPORT_SSE2 FALSE)
+    set(COMPILER_SUPPORT_AVX2 FALSE)
+    message(STATUS "Recognized RISC-V target ${CMAKE_SYSTEM_PROCESSOR}; hardware-accelerated x86 shuffle implementations are disabled and generic routines will be used.")
 else()
     # If the target system processor isn't recognized, emit a warning message to alert the user
     # that hardware-acceleration support won't be available but allow configuration to proceed.
diff --git a/blosc/shuffle.c b/blosc/shuffle.c
index 9e3ee3e3..48e0e967 100644
--- a/blosc/shuffle.c
+++ b/blosc/shuffle.c
@@ -285,6 +285,12 @@ static blosc_cpu_features blosc_get_cpu_features(void) {
 }
 #endif
 
+#elif defined(__riscv)
+
+static blosc_cpu_features blosc_get_cpu_features(void) {
+  return BLOSC_HAVE_NOTHING;
+}
+
 #else   /* No hardware acceleration supported for the target architecture. */
   #if defined(_MSC_VER)
   #pragma message("Hardware-acceleration detection not implemented for the target architecture. Only the generic shuffle/unshuffle routines will be available.")
@@ -301,6 +307,7 @@ static blosc_cpu_features blosc_get_cpu_features(void) {
 static shuffle_implementation_t get_shuffle_implementation(void) {
   blosc_cpu_features cpu_features = blosc_get_cpu_features();
   shuffle_implementation_t impl_generic;
+  (void)cpu_features;
 
 #if defined(SHUFFLE_AVX2_ENABLED)
   if (cpu_features & BLOSC_HAVE_AVX2) {

From 1d062607648db0594dfd6d454c0e60d636f1d72c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E9=98=B3?= <657837019@qq.com>
Date: Mon, 15 Jun 2026 22:01:23 +0800
Subject: [PATCH 2/2] Silence generic fallback detection warning

---
 blosc/shuffle.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/blosc/shuffle.c b/blosc/shuffle.c
index 48e0e967..72557134 100644
--- a/blosc/shuffle.c
+++ b/blosc/shuffle.c
@@ -285,19 +285,7 @@ static blosc_cpu_features blosc_get_cpu_features(void) {
 }
 #endif
 
-#elif defined(__riscv)
-
-static blosc_cpu_features blosc_get_cpu_features(void) {
-  return BLOSC_HAVE_NOTHING;
-}
-
 #else   /* No hardware acceleration supported for the target architecture. */
-  #if defined(_MSC_VER)
-  #pragma message("Hardware-acceleration detection not implemented for the target architecture. Only the generic shuffle/unshuffle routines will be available.")
-  #else
-  #warning Hardware-acceleration detection not implemented for the target architecture. Only the generic shuffle/unshuffle routines will be available.
-  #endif
-
 static blosc_cpu_features blosc_get_cpu_features(void) {
   return BLOSC_HAVE_NOTHING;
 }