From b6e2dea66f442cbc1b6e51515180b93804f90011 Mon Sep 17 00:00:00 2001
From: Francois Dugast <francois.dugast@intel.com>
Date: Tue, 6 Aug 2024 12:49:58 +0000
Subject: [PATCH]  Add IGC riscv64 build

Add CMake configuration required to build on a riscv64 host

Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Co-authored-by: Yong Li <yong.li@intel.com>
---
 IGC/CMakeLists.txt             | 32 ++++++++++++++++++++++++++++++++
 IGC/cmake/igc_arch_utils.cmake | 13 ++++++++++---
 2 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/IGC/CMakeLists.txt b/IGC/CMakeLists.txt
index 748f81668c4b..798e8ddb8972 100644
--- a/IGC/CMakeLists.txt
+++ b/IGC/CMakeLists.txt
@@ -928,6 +928,38 @@ foreach(_compilerFlagName IN ITEMS "CMAKE_CXX_FLAGS" "CMAKE_C_FLAGS")
             -fPIC
             -Bsymbolic
       )
+    elseif("${IGC_OPTION__ARCHITECTURE_TARGET}" STREQUAL "LinuxRISCV")
+      igc_config_flag_apply_settings(
+          CompilerOptions
+          "${_compilerFlagName}"
+          ALL_PATTERN ""
+          SET_RAW
+            -pipe
+            -fmessage-length=0
+            -march=rv64gc
+            -fms-extensions
+            -Werror
+            -Wno-unused-parameter
+            -Wno-missing-field-initializers
+            -Wwrite-strings
+            -Wno-long-long
+            -Wswitch
+            -Wno-sign-compare
+            -Wno-unused-result
+            -Wno-enum-compare
+            -Wno-type-limits
+            -Wno-ignored-qualifiers
+            -Wno-shadow
+            -Wformat
+            -Wformat-security
+            -Wno-extra
+            -Wno-write-strings
+            -finline
+            -fno-strict-aliasing
+            -Wno-unknown-pragmas
+            -fPIC
+            -Bsymbolic
+      )
     else()
     igc_config_flag_apply_settings(
         CompilerOptions
diff --git a/IGC/cmake/igc_arch_utils.cmake b/IGC/cmake/igc_arch_utils.cmake
index fb3fccf75af3..5e0459cb569b 100644
--- a/IGC/cmake/igc_arch_utils.cmake
+++ b/IGC/cmake/igc_arch_utils.cmake
@@ -13,7 +13,7 @@ include_guard(DIRECTORY)
 # Detects host and target architecture.
 #
 # Currently supports: Windows32, Windows64, WindowsARM, Android32, Android64, AndroidMIPS, AndroidARM,
-#                     Linux32, Linux64, LinuxMIPS, LinuxARM
+#                     Linux32, Linux64, LinuxMIPS, LinuxRISCV, LinuxARM
 #
 # @param targetArchVarName Name of variable placeholder for target architecture.
 # @param hostArchVarName   Name of variable placeholder for host architecture.
@@ -45,6 +45,8 @@ function(igc_arch_detect targetArchVarName hostArchVarName)
       set(_targetArchitecture "${_targetArchOS}32")
     elseif(_cmakeTargetProcessor MATCHES "mips")
       set(_targetArchitecture "${_targetArchOS}MIPS")
+    elseif(_cmakeTargetProcessor MATCHES "riscv64")
+      set(_targetArchitecture "${_targetArchOS}RISCV")
     else()
       set(_targetArchitecture "${_targetArchOS}ARM")
     endif()
@@ -80,6 +82,8 @@ function(igc_arch_detect targetArchVarName hostArchVarName)
       set(_hostArchitecture "${_hostArchOS}32")
     elseif(_osArchitecture MATCHES "mips")
       set(_hostArchitecture "${_hostArchOS}MIPS")
+    elseif(_osArchitecture MATCHES "riscv64")
+      set(_hostArchitecture "${_hostArchOS}RISCV")
     else()
       set(_hostArchitecture "${_hostArchOS}ARM")
     endif()
@@ -101,7 +105,8 @@ function(igc_arch_validate retVarName arch)
   set(__allowedArchs
       "Windows32" "Windows64"               "WindowsARM"
       "Android32" "Android64" "AndroidMIPS" "AndroidARM"
-      "Linux32"   "Linux64"   "LinuxMIPS"   "LinuxARM"
+      "Linux32"   "Linux64"   "LinuxMIPS"   "LinuxRISCV"
+      "LinuxARM"
     )
 
   list(FIND __allowedArchs "${arch}" _allowedArchIdx)
@@ -117,7 +122,7 @@ endfunction()
 # the "Unknown-NOTFOUND" will be returned.
 #
 # Currently supports: Windows32, Windows64, WindowsARM, Android32, Android64, AndroidMIPS, AndroidARM,
-#                     Linux32, Linux64, LinuxMIPS, LinuxARM
+#                     Linux32, Linux64, LinuxMIPS, LinuxRISCV, LinuxARM
 #
 # @param retValName Name of variable placeholder where result will be returned.
 # @param arch       Architecture name to normalize / filter.
@@ -141,6 +146,8 @@ function(igc_arch_normalize retVarName arch)
     set(_cpuPart "32")
   elseif(_arch MATCHES "mips^")
     set(_cpuPart "MIPS")
+  elseif(_arch MATCHES "riscv^")
+    set(_cpuPart "RISCV")
   elseif(_arch MATCHES "arm|aarch64")
     set(_cpuPart "ARM")
   else()