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