From 1dbf2bef7934cee9829d875f11968d6ff1fee77f Mon Sep 17 00:00:00 2001
From: mengqinggang <mengqinggang@loongson.cn>
Date: Wed, 8 May 2024 10:06:15 +0800
Subject: LoongArch: Add support for TLS Descriptors

This is mostly based on AArch64 and RISC-V implementation.

Add R_LARCH_TLS_DESC32 and R_LARCH_TLS_DESC64 relocations.

For _dl_tlsdesc_dynamic function slow path, temporarily save and restore
all vector registers.
---
 sysdeps/loongarch/configure.ac | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'sysdeps/loongarch/configure.ac')

diff --git a/sysdeps/loongarch/configure.ac b/sysdeps/loongarch/configure.ac
index 28a8ae5486..24fee55dcc 100644
--- a/sysdeps/loongarch/configure.ac
+++ b/sysdeps/loongarch/configure.ac
@@ -65,3 +65,19 @@ rm -f conftest*])
 if test $libc_cv_loongarch_vec_asm = no; then
   AC_MSG_ERROR([binutils version is too old, use 2.41 or newer version])
 fi
+
+AC_CACHE_CHECK([for vector support in compiler],
+		libc_cv_loongarch_vec_com, [
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+void foo (void)
+{
+  asm volatile ("vldi $vr0, 1" ::: "$vr0");
+  asm volatile ("xvldi $xr0, 1" ::: "$xr0");
+}
+]])],
+                [libc_cv_loongarch_vec_com=yes],
+                [libc_cv_loongarch_vec_com=no])])
+if test "$libc_cv_loongarch_vec_com" = yes ;
+then
+  AC_DEFINE(HAVE_LOONGARCH_VEC_COM)
+fi
-- 
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