[RFC 3/7] RISCV: Add AMO release bits

[Patrick O'Neill <patrick@rivosinc.com>]

This patch sets the relevant .rl bits on amo operations.

2022-03-31 Patrick O'Neill <patrick@rivosinc.com>

	* riscv.cc (riscv_print_operand): change behavior of %A to
	include release bits.

Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>
---
 gcc/config/riscv/riscv.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index ee756aab694..813e771bec7 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3652,8 +3652,13 @@ riscv_print_operand (FILE *file, rtx op, int letter)
       break;
 
     case 'A':
-      if (riscv_memmodel_needs_amo_acquire ((enum memmodel) INTVAL (op)))
+      if (riscv_memmodel_needs_amo_acquire ((enum memmodel) INTVAL (op)) &&
+	  riscv_memmodel_needs_release_fence ((enum memmodel) INTVAL (op)))
+	fputs (".aqrl", file);
+      else if (riscv_memmodel_needs_amo_acquire ((enum memmodel) INTVAL (op)))
 	fputs (".aq", file);
+      else if (riscv_memmodel_needs_release_fence ((enum memmodel) INTVAL (op)))
+	fputs (".rl", file);
       break;
 
     case 'F':
-- 
2.25.1