From de15b845ea36213769dbbce995b82edc867b98a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sobala?=
 <61153692+lukaszsobala@users.noreply.github.com>
Date: Thu, 20 Nov 2025 02:17:39 +0000
Subject: [PATCH 1/5] First vibe rv64 commit

---
 makefile | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/makefile b/makefile
index e5b3a21..587e1ec 100644
--- a/makefile
+++ b/makefile
@@ -7,6 +7,20 @@ $(call INIT_SUBMODULES)
 $(call INIT_GLOBALS)
 $(call CHECK_OS_ARCH, $(PLATFORM))
 
+# RISC-V specific override (must come after CHECK_OS_ARCH)
+# Usage:
+#   make PLATFORM=rv64g   -> generic scalar rv64g
+#   make PLATFORM=rv64gcv -> vector extension rv64gcv (placeholder macro SIMD_RVV)
+ifeq ($(ARCH_TYPE),riscv64)
+ifneq ($(findstring rv64gcv,$(PLATFORM)),)
+ARCH_FLAGS=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV
+$(info *** RISC-V rv64gcv with vector extension (SIMD_RVV placeholder) ***)
+else
+ARCH_FLAGS=-march=rv64g -mabi=lp64d -DARCH_RISCV
+$(info *** RISC-V rv64g generic (scalar fallback) ***)
+endif
+endif
+
 # *** Project directories
 $(call SET_SRC_OBJ_BIN,src,obj,bin)
 3RD_PARTY_DIR := ./libs
@@ -62,7 +76,7 @@ $(OBJ_SIMD_DIR)/utils_avx.cpp.o: $(SRC_SIMD_DIR)/utils_avx.cpp
 $(OBJ_SIMD_DIR)/utils_avx2.cpp.o: $(SRC_SIMD_DIR)/utils_avx2.cpp
 	@mkdir -p $(OBJ_SIMD_DIR)
 	$(CXX) $(CPP_FLAGS_AVX2) $(OPTIMIZATION_FLAGS) $(ARCH_FLAGS) $(INCLUDE_DIRS) -MMD -MF $@.d -c $< -o $@
-else
+else ifeq ($(ARCH_TYPE),aarch64)
 SRC_SIMD := $(SRC_SIMD_DIR)/lcsbp_neon_intr.cpp $(SRC_SIMD_DIR)/utils_neon.cpp 
 $(OBJ_SIMD_DIR)/lcsbp_neon_intr.cpp.o: $(SRC_SIMD_DIR)/lcsbp_neon_intr.cpp
 	@mkdir -p $(OBJ_SIMD_DIR)
@@ -70,6 +84,12 @@ $(OBJ_SIMD_DIR)/lcsbp_neon_intr.cpp.o: $(SRC_SIMD_DIR)/lcsbp_neon_intr.cpp
 $(OBJ_SIMD_DIR)/utils_neon.cpp.o: $(SRC_SIMD_DIR)/utils_neon.cpp
 	@mkdir -p $(OBJ_SIMD_DIR)
 	$(CXX) $(CPP_FLAGS_NEON) $(OPTIMIZATION_FLAGS) $(ARCH_FLAGS) $(INCLUDE_DIRS) -MMD -MF $@.d -c $< -o $@
+else ifeq ($(ARCH_TYPE),riscv64)
+# No SIMD implementation yet for RISC-V; use classic scalar paths only
+SRC_SIMD :=
+else
+# Fallback for any other arch: no SIMD
+SRC_SIMD :=
 endif
 
 OBJ_SIMD := $(patsubst $(SRC_SIMD_DIR)/%.cpp, $(OBJ_SIMD_DIR)/%.cpp.o, $(SRC_SIMD))

From d471f089105192c1dc42d332c011179bf7a797e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sobala?=
 <61153692+lukaszsobala@users.noreply.github.com>
Date: Thu, 20 Nov 2025 02:30:21 +0000
Subject: [PATCH 2/5] Second vibe

---
 makefile   |  14 +-------
 refresh.mk | 101 +++++++++++++++++++++++++++++++++++++----------------
 2 files changed, 71 insertions(+), 44 deletions(-)

diff --git a/makefile b/makefile
index 587e1ec..6032743 100644
--- a/makefile
+++ b/makefile
@@ -7,19 +7,6 @@ $(call INIT_SUBMODULES)
 $(call INIT_GLOBALS)
 $(call CHECK_OS_ARCH, $(PLATFORM))
 
-# RISC-V specific override (must come after CHECK_OS_ARCH)
-# Usage:
-#   make PLATFORM=rv64g   -> generic scalar rv64g
-#   make PLATFORM=rv64gcv -> vector extension rv64gcv (placeholder macro SIMD_RVV)
-ifeq ($(ARCH_TYPE),riscv64)
-ifneq ($(findstring rv64gcv,$(PLATFORM)),)
-ARCH_FLAGS=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV
-$(info *** RISC-V rv64gcv with vector extension (SIMD_RVV placeholder) ***)
-else
-ARCH_FLAGS=-march=rv64g -mabi=lp64d -DARCH_RISCV
-$(info *** RISC-V rv64g generic (scalar fallback) ***)
-endif
-endif
 
 # *** Project directories
 $(call SET_SRC_OBJ_BIN,src,obj,bin)
@@ -43,6 +30,7 @@ $(call SET_FLAGS, $(TYPE))
 
 $(call SET_COMPILER_VERSION_ALLOWED, GCC, Linux_x86_64, 11, 20)
 $(call SET_COMPILER_VERSION_ALLOWED, GCC, Linux_aarch64, 11, 20)
+$(call SET_COMPILER_VERSION_ALLOWED, GCC, Linux_riscv64, 11, 20)
 $(call SET_COMPILER_VERSION_ALLOWED, GCC, Darwin_x86_64, 11, 13)
 $(call SET_COMPILER_VERSION_ALLOWED, GCC, Darwin_arm64, 11, 13)
 
diff --git a/refresh.mk b/refresh.mk
index 90cba56..ded264b 100644
--- a/refresh.mk
+++ b/refresh.mk
@@ -618,37 +618,76 @@ define CHECK_OS_ARCH
 	$(if $(shell grep -q 'avx512' /proc/cpuinfo && echo yes),$(eval CPU_EXTENSIONS_DEFS+=-DSIMD_AVX512),)
 	$(if $(shell grep -q 'neon' /proc/cpuinfo && echo yes),$(eval CPU_EXTENSIONS_DEFS+=-DSIMD_NEON),)
 
-	$(if $(filter arm8,$(1)), \
-		$(eval ARCH_FLAGS:=-march=armv8-a -DARCH_ARM) \
-		$(info *** ARMv8 with NEON extensions ***), \
-		$(if $(filter m1,$(1)), \
-			$(eval ARCH_FLAGS:=-march=armv8.4-a -DARCH_ARM -DSIMD_NEON) \
-			$(info *** Apple M1 (or newer) with NEON extensions ***), \
-			$(if $(filter sse2,$(1)), \
-				$(eval ARCH_FLAGS:=-msse2 -m64 -DARCH_X64 -DSIMD_SSE2) \
-				$(info *** x86-64 with SSE2 extensions ***), \
-				$(if $(filter avx,$(1)), \
-					$(eval ARCH_FLAGS:=-mavx -m64 -DARCH_X64 -DSIMD_AVX) \
-					$(info *** x86-64 with AVX extensions ***), \
-					$(if $(filter avx2,$(1)), \
-						$(eval ARCH_FLAGS:=-mavx2 -m64 -DARCH_X64 -DSIMD_AVX2) \
-						$(info *** x86-64 with AVX2 extensions ***), \
-						$(if $(filter avx512,$(1)), \
-							$(eval ARCH_FLAGS:=-mavx512f -mavx512dq -m64 -DARCH_X64 -DSIMD_AVX512) \
-							$(info *** x86-64 with AVX512 extensions ***), \
-							$(if $(filter generic,$(1)), \
-								$(if $(filter x86_64,$(ARCH_TYPE)), \
-									$(eval ARCH_FLAGS:=-DARCH_X64) \
-									$(info *** Unspecified platform - using generic compilation for x86_64 ***), \
-									$(eval ARCH_FLAGS:=-DARCH_ARM) \
-									$(info *** Unspecified platform - using generic compilation for ARM ***)), \
-								$(if $(filter x86_64,$(ARCH_TYPE)), \
-									$(eval ARCH_FLAGS:=-march=native -DARCH_X64) \
-									$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
-									$(info *** Unspecified platform - using native compilation for x86_64 ***), \
-									$(eval ARCH_FLAGS:=-march=native -DARCH_ARM -DSIMD_NEON) \
-									$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
-									$(info *** Unspecified platform - using native compilation for ARM ***)))))))))
+	# Platform-specific override based on provided PLATFORM argument $(1)
+	# RISC-V first (rv64g / rv64gcv)
+	$(if $(filter rv64gcv,$(1)), \
+		$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) \
+		$(info *** RISC-V rv64gcv with vector extension (SIMD_RVV) ***), \
+		$(if $(filter rv64g,$(1)), \
+			$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) \
+			$(info *** RISC-V rv64g generic (scalar) ***), \
+			$(if $(filter arm8,$(1)), \
+				$(eval ARCH_FLAGS:=-march=armv8-a -DARCH_ARM) \
+				$(info *** ARMv8 with NEON extensions ***), \
+				$(if $(filter m1,$(1)), \
+					$(eval ARCH_FLAGS:=-march=armv8.4-a -DARCH_ARM -DSIMD_NEON) \
+					$(info *** Apple M1 (or newer) with NEON extensions ***), \
+					$(if $(filter sse2,$(1)), \
+						$(eval ARCH_FLAGS:=-msse2 -m64 -DARCH_X64 -DSIMD_SSE2) \
+						$(info *** x86-64 with SSE2 extensions ***), \
+						$(if $(filter avx,$(1)), \
+							$(eval ARCH_FLAGS:=-mavx -m64 -DARCH_X64 -DSIMD_AVX) \
+							$(info *** x86-64 with AVX extensions ***), \
+							$(if $(filter avx2,$(1)), \
+								$(eval ARCH_FLAGS:=-mavx2 -m64 -DARCH_X64 -DSIMD_AVX2) \
+								$(info *** x86-64 with AVX2 extensions ***), \
+								$(if $(filter avx512,$(1)), \
+									$(eval ARCH_FLAGS:=-mavx512f -mavx512dq -m64 -DARCH_X64 -DSIMD_AVX512) \
+									$(info *** x86-64 with AVX512 extensions ***), \
+									$(if $(filter generic,$(1)), \
+										$(if $(filter x86_64,$(ARCH_TYPE)), \
+											$(eval ARCH_FLAGS:=-DARCH_X64) \
+											$(info *** Unspecified platform - using generic compilation for x86_64 ***), \
+											$(if $(filter arm%,$(ARCH_TYPE)), \
+												$(eval ARCH_FLAGS:=-DARCH_ARM -DSIMD_NEON) \
+												$(info *** Unspecified platform - using generic compilation for ARM ***), \
+												$(if $(filter riscv64,$(ARCH_TYPE)), \
+													$(eval ARCH_FLAGS:=-DARCH_RISCV) \
+													$(info *** Unspecified platform - using generic compilation for RISC-V ***), \
+												) \
+											) \
+										, \
+										$(if $(filter x86_64,$(ARCH_TYPE)), \
+											$(eval ARCH_FLAGS:=-march=native -DARCH_X64) \
+											$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
+											$(info *** Unspecified platform - using native compilation for x86_64 ***), \
+											$(if $(filter arm%,$(ARCH_TYPE)), \
+												$(eval ARCH_FLAGS:=-march=native -DARCH_ARM -DSIMD_NEON) \
+												$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
+												$(info *** Unspecified platform - using native compilation for ARM ***), \
+												$(if $(filter riscv64,$(ARCH_TYPE)), \
+													$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) \
+													$(info *** Unspecified platform - using native compilation for RISC-V rv64g ***), \
+												) \
+											) \
+										) \
+									) \
+								) \
+							) \
+						) \
+					) \
+				) \
+			) \
+		) \
+	)
+
+	# Auto-detect RISC-V vector extension if PLATFORM did not force SIMD_RVV
+	$(if $(filter riscv64,$(ARCH_TYPE)), \
+		$(if $(and $(filter-out rv64gcv,$(1)),$(shell grep -qi 'rvv' /proc/cpuinfo && echo yes)), \
+			$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) \
+			$(info *** RISC-V vector (rvv) detected; enabling SIMD_RVV ***), \
+		) \
+	)
 	
 	$(if $(filter Darwin,$(OS_TYPE)), \
 		$(eval SDK_PATH:=$(shell $(CXX) -v 2>&1 | grep -- '--with-sysroot' | sed -E 's/.*--with-sysroot=([^ ]+).*/\1/')) \

From 496751ab03fc835d9a7caa6016f75da39c69887d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sobala?=
 <61153692+lukaszsobala@users.noreply.github.com>
Date: Thu, 20 Nov 2025 02:33:45 +0000
Subject: [PATCH 3/5] Fix second vibe

---
 refresh.mk | 93 ++++++++++++++++--------------------------------------
 1 file changed, 27 insertions(+), 66 deletions(-)

diff --git a/refresh.mk b/refresh.mk
index ded264b..86355ff 100644
--- a/refresh.mk
+++ b/refresh.mk
@@ -618,76 +618,37 @@ define CHECK_OS_ARCH
 	$(if $(shell grep -q 'avx512' /proc/cpuinfo && echo yes),$(eval CPU_EXTENSIONS_DEFS+=-DSIMD_AVX512),)
 	$(if $(shell grep -q 'neon' /proc/cpuinfo && echo yes),$(eval CPU_EXTENSIONS_DEFS+=-DSIMD_NEON),)
 
-	# Platform-specific override based on provided PLATFORM argument $(1)
-	# RISC-V first (rv64g / rv64gcv)
-	$(if $(filter rv64gcv,$(1)), \
-		$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) \
-		$(info *** RISC-V rv64gcv with vector extension (SIMD_RVV) ***), \
-		$(if $(filter rv64g,$(1)), \
-			$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) \
-			$(info *** RISC-V rv64g generic (scalar) ***), \
-			$(if $(filter arm8,$(1)), \
-				$(eval ARCH_FLAGS:=-march=armv8-a -DARCH_ARM) \
-				$(info *** ARMv8 with NEON extensions ***), \
-				$(if $(filter m1,$(1)), \
-					$(eval ARCH_FLAGS:=-march=armv8.4-a -DARCH_ARM -DSIMD_NEON) \
-					$(info *** Apple M1 (or newer) with NEON extensions ***), \
-					$(if $(filter sse2,$(1)), \
-						$(eval ARCH_FLAGS:=-msse2 -m64 -DARCH_X64 -DSIMD_SSE2) \
-						$(info *** x86-64 with SSE2 extensions ***), \
-						$(if $(filter avx,$(1)), \
-							$(eval ARCH_FLAGS:=-mavx -m64 -DARCH_X64 -DSIMD_AVX) \
-							$(info *** x86-64 with AVX extensions ***), \
-							$(if $(filter avx2,$(1)), \
-								$(eval ARCH_FLAGS:=-mavx2 -m64 -DARCH_X64 -DSIMD_AVX2) \
-								$(info *** x86-64 with AVX2 extensions ***), \
-								$(if $(filter avx512,$(1)), \
-									$(eval ARCH_FLAGS:=-mavx512f -mavx512dq -m64 -DARCH_X64 -DSIMD_AVX512) \
-									$(info *** x86-64 with AVX512 extensions ***), \
-									$(if $(filter generic,$(1)), \
-										$(if $(filter x86_64,$(ARCH_TYPE)), \
-											$(eval ARCH_FLAGS:=-DARCH_X64) \
-											$(info *** Unspecified platform - using generic compilation for x86_64 ***), \
-											$(if $(filter arm%,$(ARCH_TYPE)), \
-												$(eval ARCH_FLAGS:=-DARCH_ARM -DSIMD_NEON) \
-												$(info *** Unspecified platform - using generic compilation for ARM ***), \
-												$(if $(filter riscv64,$(ARCH_TYPE)), \
-													$(eval ARCH_FLAGS:=-DARCH_RISCV) \
-													$(info *** Unspecified platform - using generic compilation for RISC-V ***), \
-												) \
-											) \
-										, \
-										$(if $(filter x86_64,$(ARCH_TYPE)), \
-											$(eval ARCH_FLAGS:=-march=native -DARCH_X64) \
-											$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
-											$(info *** Unspecified platform - using native compilation for x86_64 ***), \
-											$(if $(filter arm%,$(ARCH_TYPE)), \
-												$(eval ARCH_FLAGS:=-march=native -DARCH_ARM -DSIMD_NEON) \
-												$(eval ARCH_FLAGS+=$(CPU_EXTENSIONS_DEFS)) \
-												$(info *** Unspecified platform - using native compilation for ARM ***), \
-												$(if $(filter riscv64,$(ARCH_TYPE)), \
-													$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) \
-													$(info *** Unspecified platform - using native compilation for RISC-V rv64g ***), \
-												) \
-											) \
-										) \
-									) \
-								) \
-							) \
-						) \
-					) \
-				) \
+	# Simplified platform selection to avoid deep nested if() causing syntax errors
+	$(eval PLATFORM_ARG:=$(strip $(1)))
+	# Explicit targets
+	$(if $(filter rv64gcv,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) $(info *** RISC-V rv64gcv (vector) ***),)
+	$(if $(and $(filter rv64g,$(PLATFORM_ARG)),$(filter-out rv64gcv,$(PLATFORM_ARG))),$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) $(info *** RISC-V rv64g (scalar) ***),)
+	$(if $(filter arm8,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-march=armv8-a -DARCH_ARM) $(info *** ARMv8 ***),)
+	$(if $(filter m1,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-march=armv8.4-a -DARCH_ARM -DSIMD_NEON) $(info *** Apple M1/ARMv8.4 ***),)
+	$(if $(filter sse2,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-msse2 -m64 -DARCH_X64 -DSIMD_SSE2) $(info *** x86_64 SSE2 ***),)
+	$(if $(filter avx,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-mavx -m64 -DARCH_X64 -DSIMD_AVX) $(info *** x86_64 AVX ***),)
+	$(if $(filter avx2,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-mavx2 -m64 -DARCH_X64 -DSIMD_AVX2) $(info *** x86_64 AVX2 ***),)
+	$(if $(filter avx512,$(PLATFORM_ARG)),$(eval ARCH_FLAGS:=-mavx512f -mavx512dq -m64 -DARCH_X64 -DSIMD_AVX512) $(info *** x86_64 AVX512 ***),)
+	# Generic build
+	$(if $(filter generic,$(PLATFORM_ARG)), \
+		$(if $(filter x86_64,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-DARCH_X64) $(info *** generic x86_64 ***), \
+			$(if $(filter aarch64 arm%,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-DARCH_ARM -DSIMD_NEON) $(info *** generic ARM ***), \
+				$(if $(filter riscv64,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-DARCH_RISCV) $(info *** generic RISC-V ***),) \
 			) \
 		) \
-	)
-
-	# Auto-detect RISC-V vector extension if PLATFORM did not force SIMD_RVV
-	$(if $(filter riscv64,$(ARCH_TYPE)), \
-		$(if $(and $(filter-out rv64gcv,$(1)),$(shell grep -qi 'rvv' /proc/cpuinfo && echo yes)), \
-			$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) \
-			$(info *** RISC-V vector (rvv) detected; enabling SIMD_RVV ***), \
+	,)
+	# Native fallback if still empty
+	$(if $(ARCH_FLAGS),, \
+		$(if $(filter x86_64,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-march=native -DARCH_X64 $(CPU_EXTENSIONS_DEFS)) $(info *** native x86_64 ***), \
+			$(if $(filter aarch64 arm%,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-march=native -DARCH_ARM -DSIMD_NEON $(CPU_EXTENSIONS_DEFS)) $(info *** native ARM ***), \
+				$(if $(filter riscv64,$(ARCH_TYPE)),$(eval ARCH_FLAGS:=-march=rv64g -mabi=lp64d -DARCH_RISCV) $(info *** native RISC-V rv64g ***),) \
+			) \
 		) \
 	)
+	# Auto-detect RVV if riscv64 native and vector present and not forced scalar
+	$(if $(and $(filter riscv64,$(ARCH_TYPE)),$(filter-out rv64gcv,$(PLATFORM_ARG))), \
+		$(if $(shell grep -qi 'rvv' /proc/cpuinfo && echo yes),$(eval ARCH_FLAGS:=-march=rv64gcv -mabi=lp64d -DARCH_RISCV -DSIMD_RVV) $(info *** auto RVV enabled ***),) \
+	)
 	
 	$(if $(filter Darwin,$(OS_TYPE)), \
 		$(eval SDK_PATH:=$(shell $(CXX) -v 2>&1 | grep -- '--with-sysroot' | sed -E 's/.*--with-sysroot=([^ ]+).*/\1/')) \

From 323ef1178e438c7a1a89c3349ab93658334bf7f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sobala?=
 <61153692+lukaszsobala@users.noreply.github.com>
Date: Thu, 20 Nov 2025 02:42:12 +0000
Subject: [PATCH 4/5] Fix makefile maybe

---
 makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/makefile b/makefile
index 6032743..5019764 100644
--- a/makefile
+++ b/makefile
@@ -3,9 +3,9 @@ all: famsa
 # *** REFRESH makefile utils
 include refresh.mk
 
-$(call INIT_SUBMODULES)
-$(call INIT_GLOBALS)
-$(call CHECK_OS_ARCH, $(PLATFORM))
+$(eval $(call INIT_SUBMODULES))
+$(eval $(call INIT_GLOBALS))
+$(eval $(call CHECK_OS_ARCH,$(PLATFORM)))
 
 
 # *** Project directories

From 54c63e8eec61a6fc73e36ad5624facb64b2efe25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sobala?=
 <61153692+lukaszsobala@users.noreply.github.com>
Date: Thu, 20 Nov 2025 08:17:25 +0000
Subject: [PATCH 5/5] fix pause for riscv

---
 libs/refresh/active_thread_pool/lib/utils.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libs/refresh/active_thread_pool/lib/utils.h b/libs/refresh/active_thread_pool/lib/utils.h
index 27acbbb..eca2b3d 100644
--- a/libs/refresh/active_thread_pool/lib/utils.h
+++ b/libs/refresh/active_thread_pool/lib/utils.h
@@ -2,6 +2,7 @@
 
 #include <atomic>
 #include <cinttypes>
+#include <thread>
 
 namespace refresh
 {
@@ -14,6 +15,14 @@ namespace refresh
 			_mm_pause();
 #elif defined(__aarch64__)
 			std::this_thread::yield();
+#elif defined(__riscv) && (__riscv_xlen == 64)
+    #if defined(__riscv_zihintpause)
+			// Use the RISC-V pause hint if available
+			__asm__ __volatile__("pause");
+    #else
+			// Fallback: yield to scheduler to reduce power while spinning
+			std::this_thread::yield();
+    #endif
 #else
 			__builtin_ia32_pause();
 			//			_mm_pause();