From 07f8f78a5fb8b6a28f7b9d79fae6e411a17114ee Mon Sep 17 00:00:00 2001
From: Shiyou Yin <yinshiyou-hf@loongson.cn>
Date: Wed, 1 Dec 2021 11:52:19 +0800
Subject: [PATCH] configure: Add support for loongarch.
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For la464 cpu: ./configure --cpu=la464

With cross-compiler:
./configure --cross-prefix=loongarch64-linux-gnu- \
            --enable-cross-compile --arch=loongarch64 \
            --target-os=linux --cpu=la464

Reviewed-by: 陈昊 <chenhao@loongson.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 Changelog |  1 +
 configure | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/Changelog b/Changelog
index 56faa7f9f5..648079ab64 100644
--- a/Changelog
+++ b/Changelog
@@ -35,6 +35,7 @@ version <next>:
 - bitpacked encoder
 - VideoToolbox VP9 hwaccel
 - VideoToolbox ProRes hwaccel
+- support loongarch.
 
 
 version 4.4:
diff --git a/configure b/configure
index d8b5be8bbb..aa94c39419 100755
--- a/configure
+++ b/configure
@@ -2032,6 +2032,9 @@ ARCH_LIST="
     avr32_uc
     bfin
     ia64
+    loongarch
+    loongarch32
+    loongarch64
     m68k
     mips
     mips64
@@ -4959,6 +4962,9 @@ case "$arch" in
     arm*|iPad*|iPhone*)
         arch="arm"
     ;;
+    loongarch*)
+        arch="loongarch"
+    ;;
     mips*|IP*)
         case "$arch" in
         *el)
@@ -5106,6 +5112,18 @@ elif enabled bfin; then
 
     cpuflags="-mcpu=$cpu"
 
+elif enabled loongarch; then
+
+    enable local_aligned
+    enable simd_align_32
+    enable fast_64bit
+    enable fast_clz
+    enable fast_unaligned
+    case $cpu in
+        la464)
+            cpuflags="-march=$cpu"
+        ;;
+    esac
 elif enabled mips; then
 
     if [ "$cpu" != "generic" ]; then
@@ -5362,6 +5380,11 @@ case "$arch" in
     aarch64|alpha|ia64)
         enabled shared && enable_weak pic
     ;;
+    loongarch)
+        check_64bit loongarch32 loongarch64
+        enabled loongarch64 && disable loongarch32
+        enabled shared && enable_weak pic
+    ;;
     mips)
         check_64bit mips mips64 '_MIPS_SIM > 1'
         enabled shared && enable_weak pic