From 49aef716410a6207ba700db36c930a2ca3a89f18 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Wed, 13 Apr 2016 12:27:00 +0200 Subject: Some area improvements --- picorv32.v | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/picorv32.v b/picorv32.v index 664f8b4..10e3f6d 100644 --- a/picorv32.v +++ b/picorv32.v @@ -420,6 +420,11 @@ module picorv32 #( end always @(posedge clk) begin + if (mem_la_read || mem_la_write) begin + mem_addr <= mem_la_addr; + mem_wdata <= mem_la_wdata; + mem_wstrb <= mem_la_wstrb & {4{mem_la_write}}; + end if (!resetn) begin mem_state <= 0; mem_valid <= 0; @@ -427,9 +432,6 @@ module picorv32 #( prefetched_high_word <= 0; end else case (mem_state) 0: begin - mem_addr <= mem_la_addr; - mem_wdata <= mem_la_wdata; - mem_wstrb <= mem_la_wstrb & {4{mem_la_write}}; if (mem_do_prefetch || mem_do_rinst) begin current_insn_addr <= next_pc; end @@ -449,14 +451,13 @@ module picorv32 #( if (mem_xfer) begin if (COMPRESSED_ISA && mem_la_read) begin mem_valid <= 1; - mem_addr <= mem_la_addr; mem_la_secondword <= 1; if (!mem_la_use_prefetched_high_word) mem_16bit_buffer <= mem_rdata[31:16]; end else begin mem_valid <= 0; mem_la_secondword <= 0; - if (!mem_do_rdata) begin + if (COMPRESSED_ISA && !mem_do_rdata) begin if (~&mem_rdata[1:0] || mem_la_secondword) begin mem_16bit_buffer <= mem_rdata[31:16]; prefetched_high_word <= 1; -- cgit