Using newlib libc from riscv-tools in dhrystone benchmark
This commit is contained in:
Clifford Wolf
parent
bf062e39ac
commit
b99610fee3
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@ -326,9 +326,9 @@ any other ALU operation.
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The following dhrystone benchmark results are for a core with enabled
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`ENABLE_MUL`, `ENABLE_DIV`, and `BARREL_SHIFTER` options.
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Dhrystone benchmark results: 0.406 DMIPS/MHz (715 Dhrystones/Second/MHz)
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Dhrystone benchmark results: 0.505 DMIPS/MHz (888 Dhrystones/Second/MHz)
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For the Dhrystone benchmark the average CPI is 4.072.
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For the Dhrystone benchmark the average CPI is 4.208.
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PicoRV32 Native Memory Interface
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@ -1,7 +1,14 @@
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USE_MYSTDLIB = 0
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OBJS = dhry_1.o dhry_2.o stdlib.o
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CFLAGS = -MD -O3 -m32 -march=RV32IM -DTIME -DRISCV
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TOOLCHAIN_PREFIX = /opt/riscv32im/bin/riscv32-unknown-elf-
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OBJS = start.o dhry_1.o dhry_2.o stdlib.o
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CFLAGS = -MD -O3 -m32 -march=RV32IM -ffreestanding -nostdlib -DTIME -DRISCV
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TOOLCHAIN_PREFIX = riscv32-unknown-elf-
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ifeq ($(USE_MYSTDLIB),1)
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CFLAGS += -DUSE_MYSTDLIB -ffreestanding -nostdlib
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OBJS += start.o
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else
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OBJS += syscalls.o
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endif
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test: testbench.vvp dhry.hex
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vvp -N testbench.vvp
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@ -21,16 +28,18 @@ timing.vvp: testbench.v ../picorv32.v
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iverilog -o timing.vvp -DTIMING testbench.v ../picorv32.v
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chmod -x timing.vvp
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dhry.hex: dhry.bin ../firmware/makehex.py
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python3 ../firmware/makehex.py $< 16384 > $@
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dhry.hex: dhry.elf
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riscv32-unknown-elf-objcopy -O verilog $< $@
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dhry.bin: dhry.elf
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$(TOOLCHAIN_PREFIX)objcopy -O binary $< $@
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ifeq ($(USE_MYSTDLIB),1)
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dhry.elf: $(OBJS) sections.lds
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$(TOOLCHAIN_PREFIX)gcc $(CFLAGS) -Wl,-Bstatic,-T,sections.lds,-Map,dhry.map,--strip-debug -o $@ $(OBJS) -lgcc
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chmod -x $@
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dhry.elf: $(OBJS) ../firmware/sections.lds
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$(TOOLCHAIN_PREFIX)gcc $(CFLAGS) -Wl,-Bstatic,-T,../firmware/sections.lds,-Map,dhry.map,--strip-debug -o $@ $(OBJS) -lgcc
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else
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dhry.elf: $(OBJS)
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$(TOOLCHAIN_PREFIX)gcc $(CFLAGS) -Wl,-Bstatic,-Map,dhry.map,--strip-debug -o $@ $(OBJS) -lgcc -lc
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chmod -x $@
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endif
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%.o: %.c
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$(TOOLCHAIN_PREFIX)gcc -c $(CFLAGS) $<
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@ -17,6 +17,13 @@
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#include "dhry.h"
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#ifdef USE_MYSTDLIB
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extern char *malloc ();
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#else
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# include <stdlib.h>
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# include <string.h>
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#endif
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/* Global Variables: */
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Rec_Pointer Ptr_Glob,
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@ -28,7 +35,6 @@ char Ch_1_Glob,
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int Arr_1_Glob [50];
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int Arr_2_Glob [50] [50];
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extern char *malloc ();
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Enumeration Func_1 ();
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/* forward declaration necessary since Enumeration may not simply be int */
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@ -43,7 +49,7 @@ Enumeration Func_1 ();
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/* variables for time measurement: */
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#ifdef TIMES
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#ifdef IGN_TIMES
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struct tms time_info;
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extern int times ();
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/* see library function "times" */
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@ -124,9 +130,9 @@ main ()
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}
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printf ("Please give the number of runs through the benchmark: ");
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{
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int n;
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scanf ("%d", &n);
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Number_Of_Runs = n;
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// int n;
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// scanf ("%d", &n);
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Number_Of_Runs = 100;
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}
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printf ("\n");
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@ -136,7 +142,7 @@ main ()
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/* Start timer */
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/***************/
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#ifdef TIMES
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#ifdef IGN_TIMES
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times (&time_info);
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Begin_Time = (long) time_info.tms_utime;
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#endif
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@ -197,7 +203,7 @@ main ()
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/* Stop timer */
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/**************/
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#ifdef TIMES
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#ifdef IGN_TIMES
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times (&time_info);
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End_Time = (long) time_info.tms_utime;
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#endif
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@ -0,0 +1,18 @@
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/*
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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*/
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SECTIONS {
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.memory : {
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. = 0x10000;
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start*(.text);
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*(.text);
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*(*);
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end = .;
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}
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}
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@ -1,18 +1,27 @@
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// This is free and unencumbered software released into the public domain.
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//
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// Anyone is free to copy, modify, publish, use, compile, sell, or
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// distribute this software, either in source code form or as a compiled
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// binary, for any purpose, commercial or non-commercial, and by any
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// means.
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#include <stdarg.h>
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#include <stdint.h>
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extern long time();
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extern long insn();
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#ifdef USE_MYSTDLIB
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extern char *malloc();
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extern int printf(const char *format, ...);
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extern int scanf(const char *format, ...);
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// implementations are copy&paste from riscv newlib
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extern void *memcpy(void *dest, const void *src, long n);
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extern char *strcpy(char *dest, const char *src);
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extern int strcmp(const char *s1, const char *s2);
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char heap_memory[1024];
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int heap_memory_used = 0;
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#endif
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long time()
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{
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@ -30,6 +39,7 @@ long insn()
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return insns;
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}
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#ifdef USE_MYSTDLIB
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char *malloc(int size)
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{
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char *p = heap_memory + heap_memory_used;
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@ -96,213 +106,105 @@ int printf(const char *format, ...)
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va_end(ap);
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}
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int scanf(const char *format, ...)
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void *memcpy(void *aa, const void *bb, long n)
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{
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// printf("[scanf(\"%s\")]\n", format);
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va_list ap;
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va_start(ap, format);
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*va_arg(ap,int*) = 100;
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va_end(ap);
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return 0;
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// printf("**MEMCPY**\n");
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char *a = aa;
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const char *b = bb;
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while (n--) *(a++) = *(b++);
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return aa;
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}
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// -------------------------------------------------------
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// Copy&paste from RISC-V newlib:
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void* memcpy(void* aa, const void* bb, long n)
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char *strcpy(char* dst, const char* src)
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{
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#define BODY(a, b, t) { \
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t tt = *b; \
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a++, b++; \
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*(a-1) = tt; \
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}
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char *r = dst;
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char* a = (char*)aa;
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const char* b = (const char*)bb;
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char* end = a+n;
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unsigned long msk = sizeof(long)-1;
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if (__builtin_expect(((unsigned long)a & msk) != ((unsigned long)b & msk) || n < sizeof(long), 0))
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{
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small:
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if (__builtin_expect(a < end, 1))
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while (a < end)
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BODY(a, b, char);
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return aa;
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}
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while ((((uint32_t)dst | (uint32_t)src) & 3) != 0)
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{
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char c = *(src++);
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*(dst++) = c;
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if (!c) return r;
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}
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if (__builtin_expect(((unsigned long)a & msk) != 0, 0))
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while ((unsigned long)a & msk)
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BODY(a, b, char);
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while (1)
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{
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uint32_t v = *(uint32_t*)src;
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long* la = (long*)a;
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const long* lb = (const long*)b;
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long* lend = (long*)((unsigned long)end & ~msk);
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if (__builtin_expect((((v) - 0x01010101UL) & ~(v) & 0x80808080UL), 0))
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{
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dst[0] = v & 0xff;
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if ((v & 0xff) == 0)
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return r;
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v = v >> 8;
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if (__builtin_expect(la < lend-8, 0))
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{
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while (la < lend-8)
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{
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long b0 = *lb++;
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long b1 = *lb++;
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long b2 = *lb++;
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long b3 = *lb++;
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long b4 = *lb++;
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long b5 = *lb++;
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long b6 = *lb++;
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long b7 = *lb++;
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long b8 = *lb++;
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*la++ = b0;
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*la++ = b1;
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*la++ = b2;
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*la++ = b3;
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*la++ = b4;
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*la++ = b5;
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*la++ = b6;
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*la++ = b7;
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*la++ = b8;
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}
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}
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dst[1] = v & 0xff;
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if ((v & 0xff) == 0)
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return r;
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v = v >> 8;
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while (la < lend)
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BODY(la, lb, long);
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dst[2] = v & 0xff;
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if ((v & 0xff) == 0)
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return r;
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v = v >> 8;
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a = (char*)la;
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b = (const char*)lb;
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if (__builtin_expect(a < end, 0))
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goto small;
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return aa;
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dst[3] = v & 0xff;
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return r;
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}
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*(uint32_t*)dst = v;
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src += 4;
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dst += 4;
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}
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}
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static inline unsigned long __libc_detect_null(unsigned long w)
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int strcmp(const char *s1, const char *s2)
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{
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unsigned long mask = 0x7f7f7f7f;
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if (sizeof(long) == 8)
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mask = ((mask << 16) << 16) | mask;
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return ~(((w & mask) + mask) | w | mask);
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while ((((uint32_t)s1 | (uint32_t)s2) & 3) != 0)
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{
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char c1 = *(s1++);
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char c2 = *(s2++);
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if (c1 != c2)
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return c1 < c2 ? -1 : +1;
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else if (!c1)
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return 0;
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}
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while (1)
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{
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uint32_t v1 = *(uint32_t*)s1;
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uint32_t v2 = *(uint32_t*)s2;
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if (__builtin_expect(v1 != v2, 0))
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{
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char c1, c2;
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c1 = v1 & 0xff, c2 = v2 & 0xff;
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if (c1 != c2) return c1 < c2 ? -1 : +1;
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if (!c1) return 0;
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v1 = v1 >> 8, v2 = v2 >> 8;
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c1 = v1 & 0xff, c2 = v2 & 0xff;
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if (c1 != c2) return c1 < c2 ? -1 : +1;
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if (!c1) return 0;
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v1 = v1 >> 8, v2 = v2 >> 8;
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c1 = v1 & 0xff, c2 = v2 & 0xff;
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if (c1 != c2) return c1 < c2 ? -1 : +1;
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if (!c1) return 0;
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v1 = v1 >> 8, v2 = v2 >> 8;
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c1 = v1 & 0xff, c2 = v2 & 0xff;
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if (c1 != c2) return c1 < c2 ? -1 : +1;
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return 0;
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}
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if (__builtin_expect((((v1) - 0x01010101UL) & ~(v1) & 0x80808080UL), 0))
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return 0;
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s1 += 4;
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s2 += 4;
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}
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}
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#endif
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char* strcpy(char* dst, const char* src)
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{
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char* dst0 = dst;
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#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__)
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int misaligned = ((unsigned long)dst | (unsigned long)src) & (sizeof(long)-1);
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if (__builtin_expect(!misaligned, 1))
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{
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long* ldst = (long*)dst;
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const long* lsrc = (const long*)src;
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while (!__libc_detect_null(*lsrc))
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*ldst++ = *lsrc++;
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dst = (char*)ldst;
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src = (const char*)lsrc;
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char c0 = src[0];
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char c1 = src[1];
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char c2 = src[2];
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if (!(*dst++ = c0)) return dst0;
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if (!(*dst++ = c1)) return dst0;
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char c3 = src[3];
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if (!(*dst++ = c2)) return dst0;
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if (sizeof(long) == 4) goto out;
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char c4 = src[4];
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if (!(*dst++ = c3)) return dst0;
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char c5 = src[5];
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if (!(*dst++ = c4)) return dst0;
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char c6 = src[6];
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if (!(*dst++ = c5)) return dst0;
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if (!(*dst++ = c6)) return dst0;
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out:
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*dst++ = 0;
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return dst0;
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}
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#endif /* not PREFER_SIZE_OVER_SPEED */
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char ch;
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do
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{
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ch = *src;
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src++;
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dst++;
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*(dst-1) = ch;
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} while(ch);
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return dst0;
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}
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/* copy&paste from disassembled libc */
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// strcmp.S: Artisanally coded in California by A. Shell Waterman
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asm (
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" .global strcmp; "
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" strcmp: or a4,a0,a1; "
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" li t2,-1; "
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" andi a4,a4,3; "
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" bnez a4,.K1; "
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" lui t3,0x7f7f8; "
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" addi t3,t3,-129; "
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" .K6: lw a2,0(a0); "
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" lw a3,0(a1); "
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" and t0,a2,t3; "
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" or t1,a2,t3; "
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" add t0,t0,t3; "
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" or t0,t0,t1; "
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" bne t0,t2,.K2; "
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" bne a2,a3,.K3; "
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" lw a2,4(a0); "
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" lw a3,4(a1); "
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" and t0,a2,t3; "
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" or t1,a2,t3; "
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" add t0,t0,t3; "
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" or t0,t0,t1; "
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" bne t0,t2,.K4; "
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" bne a2,a3,.K3; "
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" lw a2,8(a0); "
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" lw a3,8(a1); "
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" and t0,a2,t3; "
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" or t1,a2,t3; "
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" add t0,t0,t3; "
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" or t0,t0,t1; "
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" bne t0,t2,.K5; "
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" addi a0,a0,12; "
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" addi a1,a1,12; "
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" beq a2,a3,.K6; "
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" .K3: slli a4,a2,0x10; "
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" slli a5,a3,0x10; "
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" bne a4,a5,.K7; "
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" srli a4,a2,0x10; "
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" srli a5,a3,0x10; "
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" sub a0,a4,a5; "
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" andi a1,a0,255; "
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" bnez a1,.K8; "
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" ret; "
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" .K7: srli a4,a4,0x10; "
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" srli a5,a5,0x10; "
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" sub a0,a4,a5; "
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" andi a1,a0,255; "
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" bnez a1,.K8; "
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" ret; "
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" .K8: andi a4,a4,255; "
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" andi a5,a5,255; "
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" sub a0,a4,a5; "
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" ret; "
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" .K1: lbu a2,0(a0); "
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" lbu a3,0(a1); "
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" addi a0,a0,1; "
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" addi a1,a1,1; "
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" bne a2,a3,.K9; "
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" bnez a2,.K1; "
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" .K9: sub a0,a2,a3; "
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" ret; "
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" .K4: addi a0,a0,4; "
|
||||
" addi a1,a1,4; "
|
||||
" .K2: bne a2,a3,.K1; "
|
||||
" li a0,0; "
|
||||
" ret; "
|
||||
" .K5: addi a0,a0,8; "
|
||||
" addi a1,a1,8; "
|
||||
" bne a2,a3,.K1; "
|
||||
" li a0,0; "
|
||||
" ret; "
|
||||
);
|
||||
|
|
|
|||
|
|
@ -0,0 +1,95 @@
|
|||
// An extremely minimalist syscalls.c for newlib
|
||||
// Based on riscv newlib libgloss/riscv/machine/syscall.h
|
||||
// Written by Clifford Wolf.
|
||||
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
|
||||
#define UNIMPL_FUNC(_f) ".globl " #_f "\n.type " #_f ", @function\n" #_f ":\n"
|
||||
|
||||
asm (
|
||||
".text\n"
|
||||
".align 2\n"
|
||||
UNIMPL_FUNC(open)
|
||||
UNIMPL_FUNC(openat)
|
||||
UNIMPL_FUNC(lseek)
|
||||
UNIMPL_FUNC(stat)
|
||||
UNIMPL_FUNC(lstat)
|
||||
UNIMPL_FUNC(fstatat)
|
||||
UNIMPL_FUNC(isatty)
|
||||
UNIMPL_FUNC(access)
|
||||
UNIMPL_FUNC(faccessat)
|
||||
UNIMPL_FUNC(link)
|
||||
UNIMPL_FUNC(unlink)
|
||||
UNIMPL_FUNC(execve)
|
||||
UNIMPL_FUNC(getpid)
|
||||
UNIMPL_FUNC(fork)
|
||||
UNIMPL_FUNC(kill)
|
||||
UNIMPL_FUNC(wait)
|
||||
UNIMPL_FUNC(times)
|
||||
UNIMPL_FUNC(gettimeofday)
|
||||
UNIMPL_FUNC(ftime)
|
||||
UNIMPL_FUNC(utime)
|
||||
UNIMPL_FUNC(chown)
|
||||
UNIMPL_FUNC(chmod)
|
||||
UNIMPL_FUNC(chdir)
|
||||
UNIMPL_FUNC(getcwd)
|
||||
UNIMPL_FUNC(sysconf)
|
||||
"j unimplemented_syscall\n"
|
||||
);
|
||||
|
||||
void unimplemented_syscall()
|
||||
{
|
||||
const char *p = "Unimplemented system call called!\n";
|
||||
while (*p)
|
||||
*(volatile int*)0x10000000 = *(p++);
|
||||
asm volatile ("ebreak");
|
||||
__builtin_unreachable();
|
||||
}
|
||||
|
||||
ssize_t read(int file, void *ptr, size_t len)
|
||||
{
|
||||
// always EOF
|
||||
return 0;
|
||||
}
|
||||
|
||||
ssize_t write(int file, const void *ptr, size_t len)
|
||||
{
|
||||
const void *eptr = ptr + len;
|
||||
while (ptr != eptr)
|
||||
*(volatile int*)0x10000000 = *(char*)(ptr++);
|
||||
return len;
|
||||
}
|
||||
|
||||
int close(int file)
|
||||
{
|
||||
// close is called before _exit()
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fstat(int file, struct stat *st)
|
||||
{
|
||||
// fstat is called during libc startup
|
||||
errno = ENOENT;
|
||||
return -1;
|
||||
}
|
||||
|
||||
void *sbrk(ptrdiff_t incr)
|
||||
{
|
||||
extern unsigned char _end[]; // Defined by linker
|
||||
static unsigned long heap_end;
|
||||
|
||||
if (heap_end == 0)
|
||||
heap_end = (long)_end;
|
||||
|
||||
heap_end += incr;
|
||||
return (void *)(heap_end - incr);
|
||||
}
|
||||
|
||||
void _exit(int exit_status)
|
||||
{
|
||||
asm volatile ("ebreak");
|
||||
__builtin_unreachable();
|
||||
}
|
||||
|
||||
|
|
@ -29,7 +29,9 @@ module testbench;
|
|||
picorv32 #(
|
||||
.BARREL_SHIFTER(1),
|
||||
.ENABLE_MUL(1),
|
||||
.ENABLE_DIV(1)
|
||||
.ENABLE_DIV(1),
|
||||
.PROGADDR_RESET('h10000),
|
||||
.STACKADDR('h10000)
|
||||
) uut (
|
||||
.clk (clk ),
|
||||
.resetn (resetn ),
|
||||
|
|
@ -48,13 +50,16 @@ module testbench;
|
|||
.mem_la_wstrb(mem_la_wstrb)
|
||||
);
|
||||
|
||||
reg [31:0] memory [0:64*1024/4-1];
|
||||
reg [7:0] memory [0:256*1024-1];
|
||||
initial $readmemh("dhry.hex", memory);
|
||||
|
||||
assign mem_ready = 1;
|
||||
|
||||
always @(posedge clk) begin
|
||||
mem_rdata <= mem_la_read ? memory[mem_la_addr >> 2] : 'bx;
|
||||
mem_rdata[ 7: 0] <= mem_la_read ? memory[mem_la_addr + 0] : 'bx;
|
||||
mem_rdata[15: 8] <= mem_la_read ? memory[mem_la_addr + 1] : 'bx;
|
||||
mem_rdata[23:16] <= mem_la_read ? memory[mem_la_addr + 2] : 'bx;
|
||||
mem_rdata[31:24] <= mem_la_read ? memory[mem_la_addr + 3] : 'bx;
|
||||
if (mem_la_write) begin
|
||||
case (mem_la_addr)
|
||||
32'h1000_0000: begin
|
||||
|
|
@ -64,10 +69,10 @@ module testbench;
|
|||
`endif
|
||||
end
|
||||
default: begin
|
||||
if (mem_la_wstrb[0]) memory[mem_la_addr >> 2][ 7: 0] <= mem_la_wdata[ 7: 0];
|
||||
if (mem_la_wstrb[1]) memory[mem_la_addr >> 2][15: 8] <= mem_la_wdata[15: 8];
|
||||
if (mem_la_wstrb[2]) memory[mem_la_addr >> 2][23:16] <= mem_la_wdata[23:16];
|
||||
if (mem_la_wstrb[3]) memory[mem_la_addr >> 2][31:24] <= mem_la_wdata[31:24];
|
||||
if (mem_la_wstrb[0]) memory[mem_la_addr + 0] <= mem_la_wdata[ 7: 0];
|
||||
if (mem_la_wstrb[1]) memory[mem_la_addr + 1] <= mem_la_wdata[15: 8];
|
||||
if (mem_la_wstrb[2]) memory[mem_la_addr + 2] <= mem_la_wdata[23:16];
|
||||
if (mem_la_wstrb[3]) memory[mem_la_addr + 3] <= mem_la_wdata[31:24];
|
||||
end
|
||||
endcase
|
||||
end
|
||||
|
|
|
|||
Loading…
Reference in New Issue