48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
package build
|
|
|
|
import (
|
|
"git.akyoto.dev/cli/q/src/build/config"
|
|
"git.akyoto.dev/cli/q/src/build/expression"
|
|
)
|
|
|
|
// CompileFunctionCall executes a function call.
|
|
// All call registers must hold the correct parameter values before the function invocation.
|
|
// Registers that are in use must be saved if they are modified by the function.
|
|
// After the function call, they must be restored in reverse order.
|
|
func (f *Function) CompileFunctionCall(expr *expression.Expression) error {
|
|
funcName := expr.Children[0].Token.Text()
|
|
|
|
if funcName == "syscall" {
|
|
return f.CompileSyscall(expr)
|
|
}
|
|
|
|
function := f.functions[funcName]
|
|
|
|
if function != f {
|
|
function.Wait()
|
|
}
|
|
|
|
parameters := expr.Children[1:]
|
|
registers := f.cpu.Call[:len(parameters)]
|
|
|
|
err := f.ExpressionsToRegisters(parameters, registers)
|
|
|
|
if config.Verbose {
|
|
f.Logf("call: %s", funcName)
|
|
}
|
|
|
|
f.assembler.Call(funcName)
|
|
f.sideEffects += function.sideEffects
|
|
return err
|
|
}
|
|
|
|
// CompileSyscall executes a syscall.
|
|
func (f *Function) CompileSyscall(expr *expression.Expression) error {
|
|
parameters := expr.Children[1:]
|
|
registers := f.cpu.Syscall[:len(parameters)]
|
|
err := f.ExpressionsToRegisters(parameters, registers)
|
|
f.assembler.Syscall()
|
|
f.sideEffects++
|
|
return err
|
|
}
|