[gcc r14-399] RISC-V: Enforce Libatomic LR/SC SEQ_CST

[gcc r14-399] RISC-V: Enforce Libatomic LR/SC SEQ_CST

[Patrick O'Neill]

https://gcc.gnu.org/g:dcd7b2f5f7233a04c8b14b362d0befa76e9654c0

commit r14-399-gdcd7b2f5f7233a04c8b14b362d0befa76e9654c0
Author: Patrick O'Neill <patrick@rivosinc.com>
Date:   Wed Apr 5 09:44:57 2023 -0700

    RISC-V: Enforce Libatomic LR/SC SEQ_CST
    
    Replace LR.aq/SC.rl pairs with the SEQ_CST LR.aqrl/SC.rl pairs
    recommended by table A.6 of the ISA manual.
    
    2023-04-27 Patrick O'Neill <patrick@rivosinc.com>
    
    libgcc/ChangeLog:
    
            * config/riscv/atomic.c: Change LR.aq/SC.rl pairs into
            sequentially consistent LR.aqrl/SC.rl pairs.
    
    Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>

Diff:
---
 libgcc/config/riscv/atomic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libgcc/config/riscv/atomic.c b/libgcc/config/riscv/atomic.c
index 573d163ea04..bd2b033132b 100644
--- a/libgcc/config/riscv/atomic.c
+++ b/libgcc/config/riscv/atomic.c
@@ -41,7 +41,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     unsigned old, tmp1, tmp2;						\
 									\
     asm volatile ("1:\n\t"						\
-		  "lr.w.aq %[old], %[mem]\n\t"				\
+		  "lr.w.aqrl %[old], %[mem]\n\t"			\
 		  #insn " %[tmp1], %[old], %[value]\n\t"		\
 		  invert						\
 		  "and %[tmp1], %[tmp1], %[mask]\n\t"			\
@@ -75,7 +75,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     unsigned old, tmp1;							\
 									\
     asm volatile ("1:\n\t"						\
-		  "lr.w.aq %[old], %[mem]\n\t"				\
+		  "lr.w.aqrl %[old], %[mem]\n\t"			\
 		  "and %[tmp1], %[old], %[mask]\n\t"			\
 		  "bne %[tmp1], %[o], 1f\n\t"				\
 		  "and %[tmp1], %[old], %[not_mask]\n\t"		\