X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/e92804b313459de4a6fc444975a0537a3fba17ad..8744c23dbf6a3c38649c800ae3d96e7e465e01fb:/Memory.v?ds=inline

diff --git a/Memory.v b/Memory.v
index 3c7ec97..1dad548 100644
--- a/Memory.v
+++ b/Memory.v
@@ -121,6 +121,7 @@ module Memory(
 		lsrh_state <= next_lsrh_state;
 		if (do_rd_data_latch)
 			rd_data_latch <= rd_data;
+		swp_oldval <= next_swp_oldval;
 		prevaddr <= addr;
 	end
 	
@@ -160,7 +161,10 @@ module Memory(
 			end
 			endcase
 		end
-		`DECODE_ALU_MULT: begin end
+		`DECODE_ALU_MULT: begin
+			outstall = 1'b0;	/* XXX work around for Xilinx bug */
+			next_lsrh_state = lsrh_state;
+		end
 		`DECODE_ALU_HDATA_REG,
 		`DECODE_ALU_HDATA_IMM: if(!inbubble) begin
 			case(lsrh_state)
@@ -254,7 +258,7 @@ module Memory(
 			end
 			`LSM_MEMIO: begin
 				outstall = 1'b1;
-				if(next_regs == 16'b0) begin
+				if(next_regs == 16'b0 && !rw_wait) begin
 					next_lsm_state = `LSM_BASEWB;
 				end
 				
@@ -345,7 +349,13 @@ module Memory(
 			default: begin end
 			endcase
 		end
-		`DECODE_ALU_MULT: begin end
+		`DECODE_ALU_MULT: begin
+			next_write_reg = write_reg;	/* XXX workaround for ISE 10.1 bug */
+			next_write_num = write_num;
+			next_write_data = write_data;
+			next_outcpsr = lsm_state == 4'b0010 ? outcpsr : cpsr;
+			next_outcpsrup = cpsrup;
+		end
 		`DECODE_ALU_HDATA_REG,
 		`DECODE_ALU_HDATA_IMM: if(!inbubble) begin
 			next_write_reg = 1'bx;
@@ -402,7 +412,7 @@ module Memory(
 			`LSM_SETUP:
 				next_write_reg = 1'b0;
 			`LSM_MEMIO: begin
-				if(insn[20]) begin
+				if(insn[20] /* L */) begin
 					next_write_reg = !rw_wait;
 					next_write_num = cur_reg;
 					next_write_data = rd_data;
@@ -465,7 +475,12 @@ module Memory(
 			default: begin end
 			endcase
 		end
-		`DECODE_ALU_MULT: begin end
+		`DECODE_ALU_MULT: begin
+			rd_req = 1'b0;	/* XXX workaround for Xilinx bug */
+			wr_req = 1'b0;
+			offset = prev_offset;
+			addr = prevaddr;
+		end
 		`DECODE_ALU_HDATA_REG,
 		`DECODE_ALU_HDATA_IMM: if(!inbubble) begin
 			addr = insn[23] ? op0 + op1 : op0 - op1; /* up/down select */
@@ -590,7 +605,6 @@ module Memory(
 	always @(*)
 	begin
 		st_read = 4'hx;
-		offset = prev_offset;
 		cur_reg = prev_reg;
 		next_regs = regs;
 		
@@ -693,6 +707,10 @@ module Memory(
 		lsrh_rddata_s1 = 16'hxxxx;
 		lsrh_rddata_s2 = 8'hxx;
 		next_swp_oldval = swp_oldval;
+		
+		align_s1 = 32'hxxxxxxxx;
+		align_s2 = 32'hxxxxxxxx;
+		align_rddata = 32'hxxxxxxxx;
 
 		/* XXX shit not given about endianness */
 		casez(insn)
@@ -706,7 +724,9 @@ module Memory(
 			default: begin end
 			endcase
 		end
-		`DECODE_ALU_MULT: begin end
+		`DECODE_ALU_MULT: begin
+			next_outbubble = inbubble;	/* XXX workaround for Xilinx bug */
+		end
 		`DECODE_ALU_HDATA_REG,
 		`DECODE_ALU_HDATA_IMM: if(!inbubble) begin
 			next_outbubble = rw_wait;