Use clock_gettime64 directly in STREAM example

fwsGonzo · Nov 24, 2023 · 72cd410 · 72cd410
1 parent b161645
commit 72cd410
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Showing 3 changed files with 19 additions and 7 deletions.
diff --git a/binaries/STREAM/CMakeLists.txt b/binaries/STREAM/CMakeLists.txt
@@ -9,7 +9,7 @@ option(TUNED       "Tuned vectorized version" OFF)
 
 if (GCC_TRIPLE STREQUAL "riscv32-unknown-elf")
 	if (TUNED)
-		set(RISCV_ABI "-march=rv32gv_zba -mabi=ilp32d")
+		set(RISCV_ABI "-march=rv32gv_zba_zbb_zbc_zbs -mabi=ilp32d")
 	else()
 		set(RISCV_ABI "")
 	endif()

diff --git a/binaries/STREAM/build.sh b/binaries/STREAM/build.sh
@@ -2,9 +2,11 @@
 set -e
 
 GCC_TRIPLE="riscv64-unknown-elf"
-
 export CC=riscv64-unknown-linux-gnu-gcc
 export CXX=riscv64-unknown-linux-gnu-g++
+#GCC_TRIPLE="riscv32-unknown-elf"
+#export CC=riscv32-unknown-elf-gcc
+#export CXX=riscv32-unknown-elf-g++
 
 mkdir -p build
 pushd build

diff --git a/binaries/STREAM/src/stream.c b/binaries/STREAM/src/stream.c
@@ -415,15 +415,25 @@ checktick()
 /* A gettimeofday routine to give access to the wall
    clock timer on most UNIX-like systems.  */
 
-#include <sys/time.h>
+#include <time.h>
+static inline int clock_gettime64(int clk_id, struct timespec *tp)
+{
+    register long a0 asm("a0") = clk_id;
+    register struct timespec * a1 asm("a1") = tp;
+    register long syscall_id asm("a7") = 403;
+
+    asm("ecall"  : "+r"(a0), "=m"(*a1)
+                 : "r"(a1), "r"(syscall_id));
+
+    return a0;
+}
 
 double mysecond()
 {
-        struct timeval tp;
-        struct timezone tzp;
+        struct timespec ts;
 
-        (void) gettimeofday(&tp,&tzp);
-        return ( (double) tp.tv_sec + (double) tp.tv_usec * 1.e-6 );
+        (void) clock_gettime64(1, &ts);
+        return ( (double) ts.tv_sec + (double) ts.tv_nsec * 1.e-9 );
 }
 
 #ifndef abs