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Towards compressed ISA support

This commit is contained in:
Clifford Wolf 2015-11-15 23:24:38 +01:00
parent bfd2a4e0fa
commit 8174d8fb7e
3 changed files with 12 additions and 7 deletions
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11
Makefile
View File

@ -4,6 +4,7 @@ FIRMWARE_OBJS = firmware/start.o firmware/irq.o firmware/print.o firmware/sieve.
GCC_WARNS = -Werror -Wall -Wextra -Wshadow -Wundef -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings
GCC_WARNS += -Wredundant-decls -Wstrict-prototypes -Wmissing-prototypes -pedantic # -Wconversion
TOOLCHAIN_PREFIX = riscv32-unknown-elf-
# COMPRESSED_ISA = C
test: testbench.exe firmware/firmware.hex
vvp -N testbench.exe
@ -33,15 +34,15 @@ test_synth: testbench_synth.exe firmware/firmware.hex
vvp -N testbench_synth.exe
testbench.exe: testbench.v picorv32.v
iverilog -o testbench.exe testbench.v picorv32.v
iverilog -o testbench.exe $(subst $(COMPRESSED_ISA),C,-DCOMPRESSED_ISA) testbench.v picorv32.v
chmod -x testbench.exe
testbench_sp.exe: testbench.v picorv32.v
iverilog -o testbench_sp.exe -DSP_TEST testbench.v picorv32.v
iverilog -o testbench_sp.exe $(subst $(COMPRESSED_ISA),C,-DCOMPRESSED_ISA) -DSP_TEST testbench.v picorv32.v
chmod -x testbench_sp.exe
testbench_axi.exe: testbench.v picorv32.v
iverilog -o testbench_axi.exe -DAXI_TEST testbench.v picorv32.v
iverilog -o testbench_axi.exe $(subst $(COMPRESSED_ISA),C,-DCOMPRESSED_ISA) -DAXI_TEST testbench.v picorv32.v
chmod -x testbench_axi.exe
testbench_synth.exe: testbench.v synth.v
@ -65,10 +66,10 @@ firmware/firmware.elf: $(FIRMWARE_OBJS) $(TEST_OBJS) firmware/sections.lds
chmod -x $@
firmware/start.o: firmware/start.S
$(TOOLCHAIN_PREFIX)gcc -c -m32 -march=RV32IMXcustom -o $@ $<
$(TOOLCHAIN_PREFIX)gcc -c -m32 -march=RV32IM$(COMPRESSED_ISA)Xcustom -o $@ $<
firmware/%.o: firmware/%.c
$(TOOLCHAIN_PREFIX)gcc -c -m32 -march=RV32I -Os --std=c99 $(GCC_WARNS) -ffreestanding -nostdlib -o $@ $<
$(TOOLCHAIN_PREFIX)gcc -c -m32 -march=RV32I$(COMPRESSED_ISA) -Os --std=c99 $(GCC_WARNS) -ffreestanding -nostdlib -o $@ $<
tests/%.o: tests/%.S tests/riscv_test.h tests/test_macros.h
$(TOOLCHAIN_PREFIX)gcc -c -m32 -march=RV32IM -o $@ -DTEST_FUNC_NAME=$(notdir $(basename $<)) \

4
picorv32.v
View File

@ -231,7 +231,7 @@ module picorv32 #(
always @(posedge clk) begin
if (mem_valid && mem_ready) begin
mem_rdata_q <= mem_rdata;
mem_rdata_q <= COMPRESSED_ISA ? mem_rdata_latched : mem_rdata;
if (COMPRESSED_ISA && mem_do_rinst) begin
case (mem_rdata_latched[1:0])
@ -1456,6 +1456,7 @@ module picorv32_axi #(
parameter [ 0:0] TWO_STAGE_SHIFT = 1,
parameter [ 0:0] TWO_CYCLE_COMPARE = 0,
parameter [ 0:0] TWO_CYCLE_ALU = 0,
parameter [ 0:0] COMPRESSED_ISA = 0,
parameter [ 0:0] CATCH_MISALIGN = 1,
parameter [ 0:0] CATCH_ILLINSN = 1,
parameter [ 0:0] ENABLE_PCPI = 0,
@ -1553,6 +1554,7 @@ module picorv32_axi #(
.TWO_STAGE_SHIFT (TWO_STAGE_SHIFT ),
.TWO_CYCLE_COMPARE (TWO_CYCLE_COMPARE ),
.TWO_CYCLE_ALU (TWO_CYCLE_ALU ),
.COMPRESSED_ISA (COMPRESSED_ISA ),
.CATCH_MISALIGN (CATCH_MISALIGN ),
.CATCH_ILLINSN (CATCH_ILLINSN ),
.ENABLE_PCPI (ENABLE_PCPI ),

4
testbench.v
View File

@ -7,7 +7,6 @@
`timescale 1 ns / 1 ps
// `define VERBOSE
// `define AXI_TEST
module testbench;
@ -54,6 +53,9 @@ module testbench;
picorv32_axi #(
`ifdef SP_TEST
.ENABLE_REGS_DUALPORT(0),
`endif
`ifdef COMPRESSED_ISA
.COMPRESSED_ISA(1),
`endif
.ENABLE_MUL(1),
.ENABLE_IRQ(1)