wip

internal/gen/gen.go

@@ -0,0 +1,34 @@
+package gen
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/mmcloughlin/avo/internal/inst"
+)
+
+type Interface interface {
+	Generate(io.Writer, []*inst.Instruction) error
+}
+
+type Func func(io.Writer, []*inst.Instruction) error
+
+func (f Func) Generate(w io.Writer, is []*inst.Instruction) error {
+	return f(w, is)
+}
+
+type printer struct {
+	w   io.Writer
+	err error
+}
+
+func (p *printer) printf(format string, args ...interface{}) {
+	if p.err != nil {
+		return
+	}
+	_, p.err = fmt.Fprintf(p.w, format, args...)
+}
+
+func (p *printer) Err() error {
+	return p.err
+}

internal/gen/loadertest.go

@@ -0,0 +1,127 @@
+package gen
+
+import (
+	"io"
+	"strings"
+
+	"github.com/mmcloughlin/avo/internal/inst"
+)
+
+type LoaderTest struct{}
+
+func (l LoaderTest) Generate(w io.Writer, is []*inst.Instruction) error {
+	p := &printer{w: w}
+
+	p.printf("TEXT loadertest(SB), 0, $0\n")
+
+	for _, i := range is {
+		p.printf("\t// %s %s\n", i.Opcode, i.Summary)
+		for _, f := range i.Forms {
+			as := args(f.Operands)
+			p.printf("\t// %#v\n", f.Operands)
+			if as == nil {
+				p.printf("\t// skip\n")
+				continue
+			}
+			p.printf("\t%s\t%s\n", i.Opcode, strings.Join(as, ", "))
+		}
+		p.printf("\n")
+	}
+
+	p.printf("\tRET\n")
+
+	return p.Err()
+}
+
+func args(ops []inst.Operand) []string {
+	as := make([]string, len(ops))
+	for i, op := range ops {
+		a := arg(op.Type)
+		if a == "" {
+			return nil
+		}
+		as[i] = a
+	}
+	return as
+}
+
+// arg generates an argument for an operand of the given type.
+func arg(t string) string {
+	m := map[string]string{
+		// <xs:enumeration value="1" />
+		// <xs:enumeration value="3" />
+		// <xs:enumeration value="imm4" />
+		// <xs:enumeration value="imm8" />
+		// <xs:enumeration value="imm16" />
+		// <xs:enumeration value="imm32" />
+		// <xs:enumeration value="imm64" />
+		// <xs:enumeration value="al" />
+		// <xs:enumeration value="cl" />
+		// <xs:enumeration value="r8" />
+		// <xs:enumeration value="r8l" />
+		// <xs:enumeration value="ax" />
+		// <xs:enumeration value="r16" />
+		// <xs:enumeration value="r16l" />
+		// <xs:enumeration value="eax" />
+		// <xs:enumeration value="r32" />
+		// <xs:enumeration value="r32l" />
+		// <xs:enumeration value="rax" />
+		// <xs:enumeration value="r64" />
+		"r64": "R8",
+		// <xs:enumeration value="mm" />
+		// <xs:enumeration value="xmm0" />
+		// <xs:enumeration value="xmm" />
+		// <xs:enumeration value="xmm{k}" />
+		// <xs:enumeration value="xmm{k}{z}" />
+		// <xs:enumeration value="ymm" />
+		// <xs:enumeration value="ymm{k}" />
+		// <xs:enumeration value="ymm{k}{z}" />
+		// <xs:enumeration value="zmm" />
+		// <xs:enumeration value="zmm{k}" />
+		// <xs:enumeration value="zmm{k}{z}" />
+		// <xs:enumeration value="k" />
+		// <xs:enumeration value="k{k}" />
+		// <xs:enumeration value="moffs32" />
+		// <xs:enumeration value="moffs64" />
+		// <xs:enumeration value="m" />
+		// <xs:enumeration value="m8" />
+		// <xs:enumeration value="m16" />
+		// <xs:enumeration value="m16{k}{z}" />
+		// <xs:enumeration value="m32" />
+		// <xs:enumeration value="m32{k}" />
+		// <xs:enumeration value="m32{k}{z}" />
+		// <xs:enumeration value="m64" />
+		// <xs:enumeration value="m64{k}" />
+		// <xs:enumeration value="m64{k}{z}" />
+		// <xs:enumeration value="m128" />
+		// <xs:enumeration value="m128{k}{z}" />
+		// <xs:enumeration value="m256" />
+		// <xs:enumeration value="m256{k}{z}" />
+		// <xs:enumeration value="m512" />
+		// <xs:enumeration value="m512{k}{z}" />
+		// <xs:enumeration value="m64/m32bcst" />
+		// <xs:enumeration value="m128/m32bcst" />
+		// <xs:enumeration value="m256/m32bcst" />
+		// <xs:enumeration value="m512/m32bcst" />
+		// <xs:enumeration value="m128/m64bcst" />
+		// <xs:enumeration value="m256/m64bcst" />
+		// <xs:enumeration value="m512/m64bcst" />
+		// <xs:enumeration value="vm32x" />
+		// <xs:enumeration value="vm32x{k}" />
+		// <xs:enumeration value="vm64x" />
+		// <xs:enumeration value="vm64x{k}" />
+		// <xs:enumeration value="vm32y" />
+		// <xs:enumeration value="vm32y{k}" />
+		// <xs:enumeration value="vm64y" />
+		// <xs:enumeration value="vm64y{k}" />
+		// <xs:enumeration value="vm32z" />
+		// <xs:enumeration value="vm32z{k}" />
+		// <xs:enumeration value="vm64z" />
+		// <xs:enumeration value="vm64z{k}" />
+		// <xs:enumeration value="rel8" />
+		// <xs:enumeration value="rel32" />
+		// <xs:enumeration value="{er}" />
+		// <xs:enumeration value="{sae}" />
+	}
+	return m[t]
+}