early-access version 1255

externals/xbyak/sample/static_buf.cpp

@@ -0,0 +1,45 @@
+/*
+	sample to use static memory
+*/
+#include <stdio.h>
+#define XBYAK_NO_OP_NAMES
+#include "xbyak/xbyak.h"
+
+MIE_ALIGN(4096) char buf[4096];
+
+struct Code : Xbyak::CodeGenerator {
+	Code()
+		: Xbyak::CodeGenerator(sizeof(buf), buf)
+	{
+		puts("generate");
+		printf("ptr=%p, %p\n", getCode(), buf);
+#ifdef XBYAK32
+		mov(eax, ptr [esp + 4]);
+		add(eax, ptr [esp + 8]);
+#elif defined(XBYAK64_WIN)
+		lea(rax, ptr [rcx + rdx]);
+#else
+		lea(rax, ptr [rdi + rsi]);
+#endif
+		ret();
+		Xbyak::CodeArray::protect(buf, sizeof(buf), Xbyak::CodeArray::PROTECT_RE);
+	}
+	~Code()
+	{
+		Xbyak::CodeArray::protect(buf, sizeof(buf), Xbyak::CodeArray::PROTECT_RW);
+	}
+} s_code;
+
+inline int add(int a, int b)
+{
+	return reinterpret_cast<int (*)(int, int)>(buf)(a, b);
+}
+
+int main()
+{
+	int sum = 0;
+	for (int i = 0; i < 10; i++) {
+		sum += add(i, 5);
+	}
+	printf("sum=%d\n", sum);
+}