51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package gen
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import (
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"github.com/mmcloughlin/avo/internal/inst"
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"github.com/mmcloughlin/avo/internal/prnt"
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"github.com/mmcloughlin/avo/printer"
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)
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type build struct {
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cfg printer.Config
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prnt.Generator
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}
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// NewBuild builds a printer that will generate instruction functions in the
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// build package. Each instruction will have one method on the build.Context
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// type, and a corresponding wrapper operating on the global Context. These
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// functions are thin wrappers around constructors generated by NewCtors.
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func NewBuild(cfg printer.Config) Interface {
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return GoFmt(&build{cfg: cfg})
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}
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func (b *build) Generate(is []inst.Instruction) ([]byte, error) {
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b.Printf("// %s\n\n", b.cfg.GeneratedWarning())
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b.Printf("package build\n\n")
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b.Printf("import (\n")
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b.Printf("\t\"%s/operand\"\n", pkg)
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b.Printf("\t\"%s/x86\"\n", pkg)
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b.Printf(")\n\n")
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for _, i := range is {
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b.instruction(i)
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}
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return b.Result()
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}
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func (b *build) instruction(i inst.Instruction) {
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s := params(i)
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// Context method.
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b.Printf("func (c *Context) %s(%s) {\n", i.Opcode, s.ParameterList())
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b.Printf("if inst, err := x86.%s(%s); err == nil", i.Opcode, s.Arguments())
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b.Printf(" { c.Instruction(inst) }")
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b.Printf(" else { c.adderror(err) }\n")
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b.Printf("}\n")
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// Global version.
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b.Printf("func %s(%s) { ctx.%s(%s) }\n\n", i.Opcode, s.ParameterList(), i.Opcode, s.Arguments())
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}
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