rtl/core: implement ldrex/strex decode

1 files changed, 27 insertions, 0 deletions

diff --git a/rtl/core/decode/ldst/exclusive.sv b/rtl/core/decode/ldst/exclusive.sv
new file mode 100644
index 0000000..7942a04
--- /dev/null
+++ b/rtl/core/decode/ldst/exclusive.sv
@@ -0,0 +1,27 @@
+`include "core/decode/isa.sv"
+`include "core/uarch.sv"
+
+module core_decode_ldst_exclusive
+(
+	input  word        insn,
+
+	output ldst_decode decode,
+	output reg_num     snd_r
+);
+
+	assign snd_r = insn `FIELD_LDST_EX_R_OK;
+
+	assign decode.rn = insn `FIELD_LDST_EX_RN;
+	assign decode.rd = insn `FIELD_LDST_EX_RD;
+	assign decode.size = LDST_WORD;
+	assign decode.load = insn `FIELD_LDST_EX_LD;
+	assign decode.increment = 0;
+	assign decode.writeback = 0;
+	assign decode.exclusive = 1;
+	assign decode.sign_extend = 0;
+	assign decode.pre_indexed = 0;
+	assign decode.unprivileged = 0;
+	assign decode.user_regs = 0;
+	assign decode.regs = 16'b0;
+
+endmodule