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From 8ed31fc5c8722d5f94a90e28cdc8d99fd66f943e Mon Sep 17 00:00:00 2001
From: eshiner <zengfuliangjx@sina.cn>
Date: Tue, 23 Sep 2025 17:27:15 +0800
Subject: [PATCH] [compiler-rt] Support HARDCODE_NO_LSE to disable lse atomic
Currently in compiler-rt, using dynamic detect for LSE support.
But for some soc/ship, there was something wrong with LSE atomic
instructions, so we need DISBALE it by HARDCODE.
Signed-off-by: eshiner <zengfuliangjx@sina.cn>
---
.../compiler-rt/lib/builtins/aarch64/lse.S | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/src/llvm-project/compiler-rt/lib/builtins/aarch64/lse.S b/src/llvm-project/compiler-rt/lib/builtins/aarch64/lse.S
index 1fe18f4..31577a4 100644
--- a/src/llvm-project/compiler-rt/lib/builtins/aarch64/lse.S
+++ b/src/llvm-project/compiler-rt/lib/builtins/aarch64/lse.S
@@ -129,6 +129,7 @@ HIDDEN(___aarch64_have_lse_atomics)
#define tmp1 17
#define tmp2 15
+#ifndef HARDCODED_NO_LSE
// Macro for branch to label if no LSE available
.macro JUMP_IF_NOT_LSE label
#if !defined(__APPLE__)
@@ -140,11 +141,15 @@ HIDDEN(___aarch64_have_lse_atomics)
#endif
cbz w(tmp0), \label
.endm
+#endif // HARDCODED_NO_LSE
#ifdef L_cas
DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(cas))
+#ifndef HARDCODED_NO_LSE
JUMP_IF_NOT_LSE 8f
+#endif // HARDCODED_NO_LSE
#if SIZE < 16
+#ifndef HARDCODED_NO_LSE
#ifdef HAS_ASM_LSE
#define CAS GLUE4(cas, A, L, S) s(0), s(1), [x2]
#else
@@ -153,6 +158,8 @@ DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(cas))
CAS // s(0), s(1), [x2]
ret
8:
+#endif // HARDCODED_NO_LSE
+ mov s(tmp0), s(0)
UXT s(tmp0), s(0)
0:
LDXR s(0), [x2]
@@ -171,6 +178,7 @@ DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(cas))
#define LDXP GLUE3(ld, A, xp)
#endif
#define STXP GLUE3(st, L, xp)
+#ifndef HARDCODED_NO_LSE
#ifdef HAS_ASM_LSE
#define CASP GLUE3(casp, A, L) x0, x1, x2, x3, [x4]
#else
@@ -180,6 +188,7 @@ DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(cas))
CASP // x0, x1, x2, x3, [x4]
ret
8:
+#endif // HARDCODED_NO_LSE
mov x(tmp0), x0
mov x(tmp1), x1
0:
@@ -197,16 +206,20 @@ END_COMPILERRT_OUTLINE_FUNCTION(NAME(cas))
#endif // L_cas
#ifdef L_swp
+#ifndef HARDCODED_NO_LSE
#ifdef HAS_ASM_LSE
#define SWP GLUE4(swp, A, L, S) s(0), s(0), [x1]
#else
#define SWP .inst 0x38208020 + B + N
#endif
+#endif // HARDCODED_NO_LSE
DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(swp))
+#ifndef HARDCODED_NO_LSE
JUMP_IF_NOT_LSE 8f
SWP // s(0), s(0), [x1]
ret
8:
+#endif // HARDCODED_NO_LSE
mov s(tmp0), s(0)
0:
LDXR s(0), [x1]
@@ -240,17 +253,21 @@ END_COMPILERRT_OUTLINE_FUNCTION(NAME(swp))
#error
#endif
+#ifndef HARDCODED_NO_LSE
#ifdef HAS_ASM_LSE
#define LDOP GLUE4(LDNM, A, L, S) s(0), s(0), [x1]
#else
#define LDOP .inst 0x38200020 + OPN + B + N
#endif
+#endif // HARDCODED_NO_LSE
DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(LDNM))
+#ifndef HARDCODED_NO_LSE
JUMP_IF_NOT_LSE 8f
LDOP // s(0), s(0), [x1]
ret
8:
+#endif // HARDCODED_NO_LSE
mov s(tmp0), s(0)
0:
LDXR s(0), [x1]
--
2.51.0.windows.1
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