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with System.Machine_Code;
use System.Machine_Code;
package body I386_Ports is
procedure Outport (Addr: in Port_Address; Data: in Byte) is
begin
Asm ("movb %0, %%al;" &
"movw %1, %%dx;" &
"outb %%al, %%dx",
No_Output_Operands,
(Byte'Asm_Input ("g", Data),
Port_Address'Asm_Input ("g", Addr)),
Clobber => "al dx",
Volatile => True);
end Outport;
procedure Inport (Addr: in Port_Address; Data: out Byte) is
begin
Asm ("movw %1, %%dx;" &
"inb %%dx, %%al;" &
"movb %%al, %0",
Byte'Asm_Output ("=g", Data),
Port_Address'Asm_Input ("g", Addr),
Clobber => "dx al",
Volatile => True);
end Inport;
end I386_Ports;
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