Add Blue Pill

platforms/README.md

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+# Performance
+
+```log
+Function:                                fib(24)   fib64(24)      comments
+----------------------------------------------------------------------------------------------------
+ESP8266             LX106 @ 160MHz         288ms       299ms      no TCO
+ESP32                 LX6 @ 240MHz         410ms       430ms      no TCO
+MXChip AZ3166      Arm M4 @ 100Mhz         651ms       713ms
+WM W600            Arm M3 @ 80MHz          716ms       782ms      stack used: 1952
+WM W600, TCO off   Arm M3 @ 80MHz          846ms       914ms      stack used: 8168
+BleNano2 (nRF52)   Arm M4 @ 64MHz          1.19s       1.29s
+Arduino MKR1000   Arm M0+ @ 48MHz          1.93s       2.06s      no TCO
+TinyBLE (nRF51)    Arm M0 @ 16MHz          5.58s       5.93s      no TCO, 16 Kb total RAM
+BluePill           Arm M3 @ 72MHz          7.62s       8.20s
+HiFive1 (FE310)  rv32imac @ 320MHz         9.10s       9.82s   <- something wrong here?
+Fomu                rv32i @ 12MHz          25.2s       26.1s
+```

platforms/bluepill/.gitignore

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+.pio

platforms/bluepill/platformio.ini

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+[env:bluepill]
+platform = ststm32
+board = bluepill_f103c8
+framework = stm32cube
+upload_protocol = stlink
+lib_deps = jeeh
+
+src_build_flags =
+  -Dd_m3FixedHeap=8192 -Dd_m3LogOutput=false
+  -Os -w -Wfatal-errors
+  -flto

platforms/bluepill/src/fib.wasm.h

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+unsigned char fib_wasm[] = {
+  0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x0b, 0x02, 0x60,
+  0x01, 0x7f, 0x01, 0x7f, 0x60, 0x01, 0x7e, 0x01, 0x7e, 0x03, 0x03, 0x02,
+  0x00, 0x01, 0x07, 0x11, 0x02, 0x04, 0x5f, 0x66, 0x69, 0x62, 0x00, 0x00,
+  0x06, 0x5f, 0x66, 0x69, 0x62, 0x36, 0x34, 0x00, 0x01, 0x0a, 0x3d, 0x02,
+  0x1d, 0x00, 0x20, 0x00, 0x41, 0x02, 0x49, 0x04, 0x40, 0x20, 0x00, 0x0f,
+  0x0b, 0x20, 0x00, 0x41, 0x02, 0x6b, 0x10, 0x00, 0x20, 0x00, 0x41, 0x01,
+  0x6b, 0x10, 0x00, 0x6a, 0x0f, 0x0b, 0x1d, 0x00, 0x20, 0x00, 0x42, 0x02,
+  0x54, 0x04, 0x40, 0x20, 0x00, 0x0f, 0x0b, 0x20, 0x00, 0x42, 0x02, 0x7d,
+  0x10, 0x01, 0x20, 0x00, 0x42, 0x01, 0x7d, 0x10, 0x01, 0x7c, 0x0f, 0x0b
+};
+unsigned int fib_wasm_len = 108;

platforms/bluepill/src/m3

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+../../../source

platforms/bluepill/src/main.cpp

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+
+#include "m3/m3.hpp"
+
+#include "fib.wasm.h"
+
+#include <jee.h>
+
+#define FATAL(msg, ...) { puts("Fatal: " msg "\n"); return; }
+
+void run_wasm()
+{
+    M3Result result = c_m3Err_none;
+
+    u8* wasm = (u8*)fib_wasm;
+    u32 fsize = fib_wasm_len-1;
+
+    puts("Loading WebAssembly...\n");
+
+    IM3Module module;
+    result = m3_ParseModule (& module, wasm, fsize);
+    if (result) FATAL("m3_ParseModule: %s", result);
+
+    IM3Runtime env = m3_NewRuntime (1024);
+    if (!env) FATAL("m3_NewRuntime");
+
+    result = m3_LoadModule (env, module);
+    if (result) FATAL("m3_LoadModule: %s", result);
+
+    IM3Function f;
+    result = m3_FindFunction (&f, env, "_fib");
+    if (result) FATAL("m3_FindFunction: %s", result);
+
+    puts("Running...\n");
+
+    const char* i_argv[2] = { "24", NULL };
+    result = m3_CallWithArgs (f, 1, i_argv);
+
+    if (result) FATAL("m3_CallWithArgs: %s", result);
+}
+
+PinC<13> led;
+
+int main()
+{
+  enableSysTick();
+  led.mode(Pinmode::out);
+
+  puts("wasm3 on Arduino, build " __DATE__ " " __TIME__ "\n");
+
+  led = 0;
+  run_wasm();
+  led = 1;
+
+  //Serial.print("Elapsed: ");
+  //Serial.print(end - start);
+  //Serial.println(" ms");
+}