;; @file
; STAM - Statistics Manager.
;

;
; Copyright (C) 2006-2015 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
; VirtualBox OSE distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;

%ifndef ___VBox_vmm_stam_mac__
%define ___VBox_vmm_stam_mac__


%ifndef VBOX_WITH_STATISTICS
 %ifdef DEBUG
  %define VBOX_WITH_STATISTICS
 %endif
%endif



;;
; Counter sample - STAMTYPE_COUNTER.
struc STAMCOUNTER
    .c              resd 2
endstruc

;;
; Increments a counter sample by one.
; @param   %1   Pointer to the STAMCOUNTER structure to operate on.
%macro STAM32_COUNTER_INC 1
%ifdef VBOX_WITH_STATISTICS
    push    ebx
    mov     ebx, %1
    inc     dword [ebx + STAMCOUNTER.c]
    adc     dword [ebx + STAMCOUNTER.c + 1], byte 0
    pop     ebx
%endif
%endmacro

%macro STAM64_COUNTER_INC 1
%ifdef VBOX_WITH_STATISTICS
    push    rbx
    mov     rbx, %1
    inc     qword [rbx + STAMCOUNTER.c]
    pop     rbx
%endif
%endmacro

%macro STAM_COUNTER_INC 1
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
    STAM64_COUNTER_INC %1
 %else
    STAM32_COUNTER_INC %1
 %endif
%endif
%endmacro


;;
; Increments a counter sample by a value.
;
; @param   %1   Pointer to the STAMCOUNTER structure to operate on.
; @param   %2   The value to add to the counter.
%macro STAM32_COUNTER_ADD 2
%ifdef VBOX_WITH_STATISTICS
    push    ebx
    mov     ebx, %1
    push    eax
    mov     eax, %2

    add     [ebx + STAMCOUNTER.c], eax
    adc     dword [ebx + STAMCOUNTER.c], byte 0

    pop     eax
    pop     ebx
%endif
%endmacro

%macro STAM64_COUNTER_ADD 2
%ifdef VBOX_WITH_STATISTICS
    push    rbx
    mov     rbx, %1
    push    rax
    mov     rax, %2

    add     [rbx + STAMCOUNTER.c], rax

    pop     rax
    pop     rbx
%endif
%endmacro

%macro STAM_COUNTER_ADD 2
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
     STAM64_COUNTER_ADD %1, %2
 %else
     STAM32_COUNTER_ADD %1, %2
 %endif
%endif
%endmacro


;;
; Profiling sample - STAMTYPE_PROFILE.
struc STAMPROFILE
    .cPeriods        resd 2
    .cTicks          resd 2
    .cTicksMax       resd 2
    .cTicksMin       resd 2
endstruc


;;
; Samples the start time of a profiling period.
;
; @param   %1    Pointer to somewhere one can store a 64-bit timestamp until STAM_PROFILE_STOPP
%macro STAM32_PROFILE_START 1
%ifdef VBOX_WITH_STATISTICS
    push    ebx
    mov     ebx, %1
    push    eax
    push    edx

    rdtsc
    mov     [ebx], eax
    mov     [ebx + 4], edx

    pop     edx
    pop     eax
    pop     ebx
%endif
%endmacro

%macro STAM64_PROFILE_START 1
%ifdef VBOX_WITH_STATISTICS
    push    rbx
    mov     rbx, %1
    push    rax
    push    rdx

    rdtsc
    mov     [rbx], eax
    mov     [rbx + 4], edx

    pop     rdx
    pop     rax
    pop     rbx
%endif
%endmacro

%macro STAM_PROFILE_START 1
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
    STAM64_PROFILE_START %1
 %else
    STAM32_PROFILE_START %1
 %endif
%endif
%endmacro


;;
; Samples the stop time of a profiling period and updates the sample.
;
; @param   %1    Pointer to the STAMPROFILE structure to operate on.
; @param   %2    Pointer to where the 64-bit timestamp from STAM_PROFILE_START was stored.
%macro STAM32_PROFILE_STOP 2
%ifdef VBOX_WITH_STATISTICS
    push    ebx
    mov     ebx, %1
    push    eax
    push    edx

    ; calc cTicks
    push    ecx
    mov     ecx, %2
    rdtsc
    sub     eax, [ecx]
    sbb     edx, [ecx + 4]
    pop     ecx

    ; update STAMPROFILE.cTicks
    add     [ebx + STAMPROFILE.cTicks], eax
    adc     [ebx + STAMPROFILE.cTicks + 4], edx
    ; update STAMPROFILE.cPeriods
    inc     dword [ebx + STAMPROFILE.cPeriods]
    adc     dword [ebx + STAMPROFILE.cPeriods + 4], byte 0

    ; update max?
    cmp     edx, [ebx + STAMPROFILE.cTicksMax + 4]
    jb short %%not_update_max
    ja short %%update_max
    cmp     eax, [ebx + STAMPROFILE.cTicksMax]
    jbe short %%not_update_max
%%update_max:
    mov     [ebx + STAMPROFILE.cTicksMax], eax
    mov     [ebx + STAMPROFILE.cTicksMax + 4], edx
%%not_update_max:

    ; update min?
    cmp     edx, [ebx + STAMPROFILE.cTicksMin + 4]
    ja short %%not_update_min
    jb short %%update_min
    cmp     eax, [ebx + STAMPROFILE.cTicksMin]
    jae short %%not_update_min
%%update_min:
    mov     [ebx + STAMPROFILE.cTicksMin], eax
    mov     [ebx + STAMPROFILE.cTicksMin + 4], edx
%%not_update_min:

    pop     edx
    pop     eax
    pop     ebx
%endif
%endmacro

%macro STAM64_PROFILE_STOP 2
%ifdef VBOX_WITH_STATISTICS
    push    rbx
    mov     rbx, %1
    push    rax
    push    rdx

    ; calc cTicks
    push    rcx
    mov     rcx, %2
    rdtsc
    sub     rax, [ecx]
    sbb     rdx, [ecx + 4]
    pop     rcx

    ; update STAMPROFILE.cTicks
    shl     rdx, 32
    or      rdx, rax
    add     [rbx + STAMPROFILE.cTicks], rdx
    ; update STAMPROFILE.cPeriods
    inc     qword [rbx + STAMPROFILE.cPeriods]

    ; update max?
    cmp     rdx, [rbx + STAMPROFILE.cTicksMax]
    jbe short %%not_update_max
    mov     [rbx + STAMPROFILE.cTicksMax], rdx
%%not_update_max:

    ; update min?
    cmp     rdx, [rbx + STAMPROFILE.cTicksMin]
    jae short %%not_update_min
    mov     [rbx + STAMPROFILE.cTicksMin], rax
%%not_update_min:

    pop     rdx
    pop     rax
    pop     rbx
%endif
%endmacro

%macro STAM_PROFILE_STOP 2
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
    STAM64_PROFILE_STOP %1, %2
 %else
    STAM32_PROFILE_STOP %1, %2
 %endif
%endif
%endmacro



struc STAMPROFILEADV
    .cPeriods       resd 2
    .cTicks         resd 2
    .cTicksMax      resd 2
    .cTicksMin      resd 2
    .tsStart        resd 2
endstruc


;;
; Samples the start time of a profiling period.
;
; @param   %1   Pointer to the STAMPROFILEADV structure to operate on.
%macro STAM32_PROFILE_ADV_START 1
%ifdef VBOX_WITH_STATISTICS
    push    ecx
    mov     ecx, %1
    lea     ecx, [ecx + STAMPROFILEADV.tsStart]
    STAM32_PROFILE_START ecx
    pop     ecx
%endif
%endmacro

%macro STAM64_PROFILE_ADV_START 1
%ifdef VBOX_WITH_STATISTICS
    push    rcx
    mov     rcx, %1
    lea     rcx, [rcx + STAMPROFILEADV.tsStart]
    STAM64_PROFILE_START rcx
    pop     rcx
%endif
%endmacro

%macro STAM_PROFILE_ADV_START 1
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
    STAM64_PROFILE_ADV_START %1
 %else
    STAM32_PROFILE_ADV_START %1
 %endif
%endif
%endmacro


;;
; Samples the stop time of a profiling period and updates the sample.
;
; @param   %1   Pointer to the STAMPROFILEADV structure to operate on.

%macro STAM32_PROFILE_ADV_STOP 1
%ifdef VBOX_WITH_STATISTICS
    push    ecx
    mov     ecx, %1
    lea     ecx, [ecx + STAMPROFILEADV.tsStart]
    cmp     dword [ecx], byte 0
    jnz short %%doit
    cmp     dword [ecx + 4], byte 0
    jz short %%dont
%%doit:
    STAM32_PROFILE_STOP %1, ecx
%%dont:
    mov     dword [ecx], 0
    mov     dword [ecx + 4], 0
    pop     ecx
%endif
%endmacro

%macro STAM64_PROFILE_ADV_STOP 1
%ifdef VBOX_WITH_STATISTICS
    push    rcx
    mov     rcx, %1
    lea     rcx, [rcx + STAMPROFILEADV.tsStart]
    cmp     qword [rcx], byte 0
    jz short %%dont
%%doit:
    STAM64_PROFILE_STOP %1, rcx
%%dont:
    mov     qword [rcx], 0
    pop     rcx
%endif
%endmacro

%macro STAM_PROFILE_ADV_STOP 1
%ifdef VBOX_WITH_STATISTICS
 %ifdef RT_ARCH_AMD64
    STAM64_PROFILE_ADV_STOP %1
 %else
    STAM32_PROFILE_ADV_STOP %1
 %endif
%endif
%endmacro



%endif