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package build
import (
"github.com/mmcloughlin/avo/attr"
"github.com/mmcloughlin/avo/gotypes"
"github.com/mmcloughlin/avo/operand"
"github.com/mmcloughlin/avo/reg"
)
//go:generate avogen -output zmov.go mov
// Param returns a the named argument of the active function.
func (c *Context) Param(name string) gotypes.Component {
return c.activefunc().Signature.Params().Lookup(name)
}
// ParamIndex returns the ith argument of the active function.
func (c *Context) ParamIndex(i int) gotypes.Component {
return c.activefunc().Signature.Params().At(i)
}
// Return returns a the named return value of the active function.
func (c *Context) Return(name string) gotypes.Component {
return c.activefunc().Signature.Results().Lookup(name)
}
// ReturnIndex returns the ith argument of the active function.
func (c *Context) ReturnIndex(i int) gotypes.Component {
return c.activefunc().Signature.Results().At(i)
}
// Load the function argument src into register dst. Returns the destination
// register. This is syntactic sugar: it will attempt to select the right MOV
// instruction based on the types involved.
func (c *Context) Load(src gotypes.Component, dst reg.Register) reg.Register {
b, err := src.Resolve()
if err != nil {
c.adderror(err)
return dst
}
c.mov(b.Addr, dst, int(gotypes.Sizes.Sizeof(b.Type)), int(dst.Size()), b.Type)
return dst
}
// Store register src into return value dst. This is syntactic sugar: it will
// attempt to select the right MOV instruction based on the types involved.
func (c *Context) Store(src reg.Register, dst gotypes.Component) {
b, err := dst.Resolve()
if err != nil {
c.adderror(err)
return
}
c.mov(src, b.Addr, int(src.Size()), int(gotypes.Sizes.Sizeof(b.Type)), b.Type)
}
// Dereference loads a pointer and returns its element type.
func (c *Context) Dereference(ptr gotypes.Component) gotypes.Component {
r := c.GP64()
c.Load(ptr, r)
return ptr.Dereference(r)
}
// ConstData builds a static data section containing just the given constant.
func (c *Context) ConstData(name string, v operand.Constant) operand.Mem {
g := c.StaticGlobal(name)
c.DataAttributes(attr.RODATA | attr.NOPTR)
c.AppendDatum(v)
return g
}
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