Implement shifter decoding

1 files changed, 18 insertions, 6 deletions

diff --git a/rtl/core/isa.sv b/rtl/core/isa.sv
index 1778d33..35610c2 100644
--- a/rtl/core/isa.sv
+++ b/rtl/core/isa.sv
@@ -52,12 +52,24 @@
 
 `define GROUP_ALU 28'b00_?_????_?_????_????_????????????
 
-`define FIELD_DATA_IMM     [25]
-`define FIELD_DATA_OPCODE  [24:21]
-`define FIELD_DATA_S       [20]
-`define FIELD_DATA_RN      [19:16]
-`define FIELD_DATA_RD      [15:12]
-`define FIELD_DATA_SHIFTER [11:0]
+`define FIELD_DATA_IMM       [25]
+`define FIELD_DATA_OPCODE    [24:21]
+`define FIELD_DATA_S         [20]
+`define FIELD_DATA_RN        [19:16]
+`define FIELD_DATA_RD        [15:12]
+`define FIELD_DATA_ROR8      [11:8]
+`define FIELD_DATA_IMM8      [7:0]
+`define FIELD_DATA_SHIFTIMM  [11:7]
+`define FIELD_DATA_RS        [11:8]
+`define FIELD_DATA_ZEROIFREG [7]
+`define FIELD_DATA_SHIFT     [6:5]
+`define FIELD_DATA_REGSHIFT  [4]
+`define FIELD_DATA_RM        [3:0]
+
+`define SHIFT_LSL 2'b00
+`define SHIFT_LSR 2'b01
+`define SHIFT_ASR 2'b10
+`define SHIFT_ROR 2'b11
 
 // Instrucciones de multiplicación