| /kernel/trunk/hid/mousedrv.inc |
|---|
| 551,39 → 551,35 |
| endp |
| ;----------------------------------------------------------------------------- |
| ; 3 = x^2 /2 |
| ; 2 = (x+1)^2 /4 |
| ; 1 = (x+2)^2 /8 |
| align 4 |
| mouse_acceleration: |
| cmp [mouse_delay], 1 |
| jz .slight |
| jc .end |
| cmp [mouse_delay], 0 |
| jz .end |
| push eax |
| @@: |
| neg eax |
| jl @b |
| mov edx, eax |
| shr edx, 1 |
| jc @f |
| mul dl |
| add eax, edx |
| jmp .next |
| @@: |
| inc edx |
| mul dl |
| .next: |
| cmp [mouse_delay], 3 |
| adc eax, 0 |
| cmp [mouse_delay], 2 |
| adc eax, 0 |
| mul al |
| shr eax, 1 |
| adc eax, 0 |
| cmp [mouse_delay], 2 |
| jz .2 |
| jnc .3 |
| shr eax, 1 |
| .2: |
| shr eax, 1 |
| .3: |
| pop edx |
| test edx, edx |
| jns .end |
| neg eax |
| jmp .end |
| ;-------------------------------------- |
| .slight: |
| shl eax, 1 |
| js @f |
| dec eax |
| jmp .end |
| @@: |
| inc eax |
| .end: |
| imul [mouse_speed_factor] |
| ret |