From 70e1e94dc87b86cf778691e2571c81ca3740f782 Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Tue, 3 Nov 2020 01:02:46 +0000
Subject: [PATCH] bench: indirect call benchmark

---
 test/benchmarks/micro/icall_hash.c      |  27 ++++++++++++++++++++++++
 test/benchmarks/micro/icall_hash.inputs |   7 ++++++
 test/benchmarks/micro/icall_hash.wasm   | Bin 0 -> 262 bytes
 3 files changed, 34 insertions(+)
 create mode 100644 test/benchmarks/micro/icall_hash.c
 create mode 100644 test/benchmarks/micro/icall_hash.inputs
 create mode 100755 test/benchmarks/micro/icall_hash.wasm

diff --git a/test/benchmarks/micro/icall_hash.c b/test/benchmarks/micro/icall_hash.c
new file mode 100644
index 000000000..4dc755179
--- /dev/null
+++ b/test/benchmarks/micro/icall_hash.c
@@ -0,0 +1,27 @@
+#include <stdint.h>
+
+#define WASM_EXPORT __attribute__((visibility("default")))
+
+static uint64_t fnv1(uint64_t state, uint64_t input)
+{
+    return (state ^ input) * 0x100000001b3;
+}
+
+static uint64_t threeab(uint64_t state, uint64_t input)
+{
+    return (3 * state) + input;
+}
+
+typedef uint64_t (*hashfn)(uint64_t state, uint64_t input);
+
+static hashfn fns[] = {fnv1, threeab};
+
+WASM_EXPORT unsigned icall(unsigned steps)
+{
+    uint64_t input = 0x1234567890abcdef;
+
+    uint64_t state = 0xcbf29ce484222325;
+    for (unsigned i = 0; i < steps; i++)
+        state = fns[i % 2](state, input);
+    return state;
+}
diff --git a/test/benchmarks/micro/icall_hash.inputs b/test/benchmarks/micro/icall_hash.inputs
new file mode 100644
index 000000000..b64cf0800
--- /dev/null
+++ b/test/benchmarks/micro/icall_hash.inputs
@@ -0,0 +1,7 @@
+1000_steps
+icall
+i:i
+1000
+
+3242341221
+
diff --git a/test/benchmarks/micro/icall_hash.wasm b/test/benchmarks/micro/icall_hash.wasm
new file mode 100755
index 0000000000000000000000000000000000000000..7bfba64a6827b663924433834006a0bc8cd608b9
GIT binary patch
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literal 0
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