TempleOSTS_140317.ISO

Demo/Asm/AsmHelloWorld.CPP

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+/*
+This is a JIT file, not AOT.
+
+Asm labels can only be defined once
+in a task.  Hit F5 to spawn a new task
+each time and run it.
+
+These are many useful kernel
+routines $LK,"::/Kernel/Str1a.CPP",A="FF:::/Kernel/Str1a.CPP,PUT_CHARS"$
+intended to be called from
+asm.  Generally, they preserve
+regs.
+
+You can call any routine you
+like, C or asm, if you import it.
+Be aware that C routines do not
+preserve RAX,RBX,RCX,RDX,R8,R9.
+When calling from the shell or
+from C, preserve all other regs.
+
+*/
+
+asm {
+//Opcodes are slightly different to make writing my x86_64 assembler easier.
+//See $LK,"::/Compiler/OpCodes.TXT"$.
+
+USE64	//Defaults to 64, but this is a good habit.
+
+MY_WORLD_MSG:
+//Define U8 does not put terminating zeros
+//on strings.
+	DU8	"World\n",0;
+
+//My convention is to put an underscore
+//on C callable routines.
+_HELLO_WORLD::
+	PUSH	RSI	//See $LK,"REG_VARS_MASK",A="MN:REG_VARS_MASK"$ & $LK,"REG_NON_PTR_MASK",A="MN:REG_NON_PTR_MASK"$
+	MOV	RCX,10
+@@05:	MOV	RAX,RCX
+	CALL	PUT_HEX_U8
+	MOV	RAX,CH_SPACE
+	CALL	PUT_CHARS
+	MOV	RAX,'Hello ' //Supports multi-byte char consts
+	CALL	PUT_CHARS
+//We broke it in two pieces to show different ways.
+	MOV	RSI,MY_WORLD_MSG
+	CALL	PUT_STR
+	LOOP	@@05
+	POP	RSI
+	RET
+};
+
+Call(_HELLO_WORLD);