Subversion Repositories Kolibri OS

;;;;;;;;;;;;;;;;;;;;;;;

;; FPU ERROR HANDLER ;;

;;;;;;;;;;;;;;;;;;;;;;;

align 4

e7:

        save_ring3_context

        clts

        mov ax, os_data

        mov ds, ax

        mov es, ax

        mov ebx, [fpu_owner]

        cmp ebx, [CURRENT_TASK]

        je .exit

        shl ebx, 8

        mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]

        bt [cpu_caps], CAPS_FXSR

        jnc .no_SSE

        fxsave [eax]

        mov ebx, [CURRENT_TASK]

        mov [fpu_owner], ebx

        shl ebx, 8

        cmp dword [ebx+PROC_BASE+APPDATA.fpu_init], 0

        je .init

        mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]

        fxrstor [eax]

        restore_ring3_context

        iret

.no_SSE:

        fnsave [eax]

        mov ebx, [CURRENT_TASK]

        mov [fpu_owner], ebx

        shl ebx, 8

        cmp dword [ebx+PROC_BASE+APPDATA.fpu_init], 0

        je .ready

        mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]

        frstor [eax]

        restore_ring3_context

        iret

.init:

        fninit                      ;­ ¬ ­¥ ­ã¦­ë ­¥¬ áª¨à®¢ ­­ë¥ ¨áª«î祭¨ï

.ready:

        mov dword [ebx+PROC_BASE+APPDATA.fpu_init], 1

.exit:

        restore_ring3_context

        iret

iglobal

  fpu_owner dd 1

 endg