From: Stephen Twigg <sdtwigg@eecs.berkeley.edu>
Date: Thu, 3 Apr 2014 23:47:43 +0000 (-0700)
Subject: setStats in benchmarks now should set and unset the stats register. Also, removed... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b961c327162755de390b9175c792ffeb309f82a6;p=riscv-tests.git

setStats in benchmarks now should set and unset the stats register. Also, removed legacy SET_STATS macro.
---

diff --git a/benchmarks/common/syscalls.c b/benchmarks/common/syscalls.c
index d506536..fbbb880 100644
--- a/benchmarks/common/syscalls.c
+++ b/benchmarks/common/syscalls.c
@@ -34,6 +34,13 @@ static long counters[NUM_COUNTERS];
 static char* counter_names[NUM_COUNTERS];
 static int handle_stats(int enable)
 {
+  //use csrs to set stats register
+  if(enable) {
+    asm volatile (R"(
+      addi v0, x0, 1
+      csrrs v0, stats, v0
+    )" : : : "v0");
+  }
   int i = 0;
 #define READ_CTR(name) do { \
     while (i >= NUM_COUNTERS) ; \
@@ -47,6 +54,12 @@ static int handle_stats(int enable)
   READ_CTR(uarch8);  READ_CTR(uarch9);  READ_CTR(uarch10); READ_CTR(uarch11);
   READ_CTR(uarch12); READ_CTR(uarch13); READ_CTR(uarch14); READ_CTR(uarch15);
 #undef READ_CTR
+  if(!enable) {
+    asm volatile (R"(
+      addi v0, x0, 1
+      csrrc v0, stats, v0
+    )" : : : "v0");
+  }
   return 0;
 }
 
@@ -59,7 +72,7 @@ static void tohost_exit(int code)
 long handle_trap(long cause, long epc, long regs[32])
 {
   int csr_insn;
-  asm volatile ("lw %0, 1f; j 2f; 1: csrr v0, uarch0; 2:" : "=r"(csr_insn));
+  asm volatile ("lw %0, 1f; j 2f; 1: csrr v0, stats; 2:" : "=r"(csr_insn));
   long sys_ret = 0;
 
   if (cause == CAUSE_ILLEGAL_INSTRUCTION &&
diff --git a/benchmarks/common/util.h b/benchmarks/common/util.h
index 082489b..ea06530 100644
--- a/benchmarks/common/util.h
+++ b/benchmarks/common/util.h
@@ -24,10 +24,6 @@
 // Set SET_STATS to 1 if you want to carve out the piece that actually
 // does the computation.
 
-#ifndef SET_STATS
-#define SET_STATS 0
-#endif
-
 #if HOST_DEBUG
 #include <stdio.h>
 static void setStats(int enable) {}