Register decode output in a new porch stage

3 files changed, 6 insertions, 69 deletions

diff --git a/rtl/core/decode/conds.sv b/rtl/core/decode/conds.sv
deleted file mode 100644
index 60922a0..0000000
--- a/rtl/core/decode/conds.sv
+++ /dev/null
@@ -1,47 +0,0 @@
-`include "core/decode/isa.sv"
-`include "core/uarch.sv"
-
-module core_decode_conds
-(
-	input  logic[3:0] cond,
-	input  psr_flags  flags,
-
-	output logic      execute,
-	                  conditional,
-	                  undefined
-);
-
-	always_comb begin
-		undefined = 0;
-		conditional = 1;
-
-		unique case(cond)
-			`COND_EQ: execute =  flags.z;
-			`COND_NE: execute = ~flags.z;
-			`COND_HS: execute =  flags.c;
-			`COND_LO: execute = ~flags.c;
-			`COND_MI: execute =  flags.n;
-			`COND_PL: execute = ~flags.n;
-			`COND_VS: execute =  flags.v;
-			`COND_VC: execute = ~flags.v;
-			`COND_HI: execute =  flags.c  & ~flags.z;
-			`COND_LS: execute = ~flags.c  |  flags.z;
-			`COND_GE: execute =  flags.n ~^  flags.v;
-			`COND_LT: execute =  flags.n  ^  flags.v;
-			`COND_GT: execute = ~flags.z  & (flags.n ~^ flags.v);
-			`COND_LE: execute =  flags.z  | (flags.n  ^ flags.v);
-
-			`COND_AL: begin
-				execute = 1;
-				conditional = 0;
-			end
-
-			`COND_UD: begin
-				execute = 1'bx;
-				conditional = 1'bx;
-				undefined = 1;
-			end
-		endcase
-	end
-
-endmodule
diff --git a/rtl/core/decode/decode.sv b/rtl/core/decode/decode.sv
index ab8d2b9..6c5b802 100644
--- a/rtl/core/decode/decode.sv
+++ b/rtl/core/decode/decode.sv
@@ -4,7 +4,6 @@
 module core_decode
 (
 	input  word        insn,
-	input  psr_flags   flags,
 
 	output insn_decode dec
 );
@@ -51,17 +50,6 @@ module core_decode
 	//TODO
 	logic restore_spsr;
 
-	logic cond_undefined, cond_execute, explicit_cond;
-
-	core_decode_conds conds
-	(
-		.cond(insn `FIELD_COND),
-		.execute(cond_execute),
-		.undefined(cond_undefined),
-		.conditional(explicit_cond),
-		.*
-	);
-
 	logic snd_is_imm, snd_ror_if_imm, snd_shift_by_reg_if_reg, snd_undefined;
 	snd_decode snd;
 
diff --git a/rtl/core/decode/mux.sv b/rtl/core/decode/mux.sv
index 643c942..ebcc098 100644
--- a/rtl/core/decode/mux.sv
+++ b/rtl/core/decode/mux.sv
@@ -5,10 +5,6 @@ module core_decode_mux
 (
 	input  word          insn,
 
-	input  logic         cond_undefined,
-	                     cond_execute,
-	                     explicit_cond,
-
 	input  logic         branch_link,
 
 	input  snd_decode    snd,
@@ -74,10 +70,10 @@ module core_decode_mux
 		ldst = 0;
 		branch = 0;
 		coproc = 0;
-		execute = cond_execute;
-		undefined = cond_undefined;
+		execute = 1;
+		undefined = 0;
 		writeback = 0;
-		conditional = explicit_cond;
+		conditional = 0;
 		restore_spsr = 0;
 
 		spsr = 0;
@@ -139,8 +135,8 @@ module core_decode_mux
 				update_flags = data_update_flags;
 				restore_spsr = data_restore_spsr;
 
-				undefined = undefined | snd_undefined;
-				conditional = conditional | data_conditional;
+				undefined = snd_undefined;
+				conditional = data_conditional;
 			end
 
 			`GROUP_LDST_SINGLE_IMM, `GROUP_LDST_SINGLE_REG: begin
@@ -152,7 +148,7 @@ module core_decode_mux
 				dec_ldst = ldst_single;
 				ldst_addr = ldst_single;
 
-				undefined = undefined | snd_undefined;
+				undefined = snd_undefined;
 			end
 
 			`GROUP_LDST_MISC_IMM, `GROUP_LDST_MISC_REG: