/*Asm labels can only be defined once
in a task.  <F5> will spawn a new task
each time, so you don't get redefine
error, like when repeatedly #including
it from the cmd line.
*/

//This is to demo glbl var access.
//Glbs defined elsewhere can accessed too, like cnts.jiffies.
I64 glbl_hz=400,glbl_hz_step=100,glbl_hz_base=100;

asm {
//Opcodes are slightly different to make writing my x86_64 assembler easier.
//See $LK,"::/Compiler/OpCodes.DD"$.

JIFFIES_MSG:	DU8 "Jiffies:",0;

//See $LK,"::/Kernel/StrA.HC",A="FL:::/Kernel/StrA.HC,1"$ and $LK,"::/Kernel/KUtils.HC"$.

_BEEPS2::
//You can clobber RAX,RBX,RCX,RDX,R8,R9.  The compiler expects that.
//See $LK,"REGG_CLOBBERED",A="MN:REGG_CLOBBERED"$ and $LK,"REGG_STK_TEMP",A="MN:REGG_STK_TEMP"$.
	PUSH	RBP
	MOV	RBP,RSP
	MOV	RCX,U64 SF_ARG1[RBP] //$LK,"SF_ARG1",A="FF:::/Kernel/KernelA.HH,SF_ARG1"$

	PUSH	U64 [&cnts.jiffies]

@@05:	PUSH	RCX
//U0 $LK,"Beep",A="MN:Beep"$(I64 freq=500,Bool busy=FALSE)
	PUSH	FALSE	//Do not busy (spin) wait
	PUSH	U64 [&glbl_hz]	//evaluated at run time
	CALL	&Beep
	POP	RCX
	LOOP	@@05

	PUSH	RSI	//See $LK,"REGG_LOCAL_VARS",A="MN:REGG_LOCAL_VARS"$ & $LK,"REGG_LOCAL_NON_PTR_VARS",A="MN:REGG_LOCAL_NON_PTR_VARS"$
	MOV	RSI,JIFFIES_MSG
	CALL	PUT_STR
	POP	RSI

	POP	RAX
	SUB	RAX,U64 [&cnts.jiffies]
	NEG	RAX
	CALL	PUT_HEX_U64
	MOV	RAX,'\n'
	CALL	PUT_CHARS

	POP	RBP
	RET1	8
}

//My convention is to put an underscore
//on C callable asm routines.
_extern _BEEPS2 U0 Beeps2(I64 cnt);

U0 AsmAndC2()
{
  I64 reg R15 i;

  i=GetI64("$$PURPLE$$\n\nNum of beeps 1-5 (%d):$$FG$$",3,1,5);
  Beeps2(i);

  asm {
    LIST
//You can clobber RAX,RBX,RCX,RDX, but preserve the rest.

    MOV	RCX,R15 //You can clobber RAX,RBX,RCX,RDX. Preserve the rest.

    @@05:	PUSH	RCX
//U0 $LK,"Snd",A="MN:Snd"$(F64 freq);

    MOV	RAX,RCX	//freq=loop*100.0+100.0
    IMUL2	RAX,glbl_hz_step	//evaluated at compile ttime
    ADD	RAX,U64 [&glbl_hz_base] //evaluated at run time
    PUSH	RAX
    FILD	U64 [RSP]	//Convert from int to floating
    FSTP	U64 [RSP]

    CALL	&Snd	//We can skip IMPORT with & if JIT compiling.

    MOV	RCX,cnts.time_stamp_freq>>3	//JIT Const.  Simple delay loop.
@@10:	LOOP	@@10

    POP	RCX
    LOOP	@@05
  }
  Snd(0);
}

AsmAndC2;