602bb5197c
The Context.Label method and LABEL global function did not agree. Also breaks the convention I'd like to set that capitalized functions must agree with existing Go assembly syntax. To help avoid a conflict with `avo.Label`, attributes were moved to their own package. Fixes #35
64 lines
2.0 KiB
Go
64 lines
2.0 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.Bytes()), 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.Bytes()), int(gotypes.Sizes.Sizeof(b.Type)), b.Type)
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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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