From dab6e68a8396475af5acbf53397f93c6b52e2e71 Mon Sep 17 00:00:00 2001 From: Alejandro Soto Date: Sat, 8 Oct 2022 15:34:46 -0600 Subject: Implement LDR/STR decode --- rtl/core/decode/ldst/misc.sv | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 rtl/core/decode/ldst/misc.sv (limited to 'rtl/core/decode/ldst/misc.sv') diff --git a/rtl/core/decode/ldst/misc.sv b/rtl/core/decode/ldst/misc.sv new file mode 100644 index 0000000..de2428f --- /dev/null +++ b/rtl/core/decode/ldst/misc.sv @@ -0,0 +1,28 @@ +`include "core/isa.sv" +`include "core/uarch.sv" + +module core_decode_ldst_misc +( + input word insn, + + output ldst_decode decode +); + + logic p, w; + + assign decode.rn = insn `FIELD_LDST_MISC_RN; + assign decode.rd = insn `FIELD_LDST_MISC_RD; + assign decode.size = insn `FIELD_LDST_MISC_H ? LDST_HALF : LDST_BYTE; + assign decode.load = insn `FIELD_LDST_LD; + assign decode.increment = insn `FIELD_LDST_MISC_U; + assign decode.writeback = !p || w; + assign decode.sign_extend = insn `FIELD_LDST_MISC_S; + assign decode.pre_indexed = p && w; + assign decode.unprivileged = 0; + assign decode.user_regs = 0; + assign decode.reg_list = 16'b0; + + assign p = insn `FIELD_LDST_MISC_P; + assign w = insn `FIELD_LDST_MISC_W; + +endmodule -- cgit v1.2.3