b76e849b5c
Extends avo to support most AVX-512 instruction sets.
The instruction type is extended to support suffixes. The K family of opmask
registers is added to the register package, and the operand package is updated
to support the new operand types. Move instruction deduction in `Load` and
`Store` is extended to support KMOV* and VMOV* forms.
Internal code generation packages were overhauled. Instruction database loading
required various messy changes to account for the additional complexities of the
AVX-512 instruction sets. The internal/api package was added to introduce a
separation between instruction forms in the database, and the functions avo
provides to create them. This was required since with instruction suffixes there
is no longer a one-to-one mapping between instruction constructors and opcodes.
AVX-512 bloated generated source code size substantially, initially increasing
compilation and CI test times to an unacceptable level. Two changes were made to
address this:
1. Instruction constructors in the `x86` package moved to an optab-based
approach. This compiles substantially faster than the verbose code
generation we had before.
2. The most verbose code-generated tests are moved under build tags and
limited to a stress test mode. Stress test builds are run on
schedule but not in regular CI.
An example of AVX-512 accelerated 16-lane MD5 is provided to demonstrate and
test the new functionality.
Updates #20 #163 #229
Co-authored-by: Vaughn Iverson <vsivsi@yahoo.com>
68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
package gen
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import (
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"fmt"
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"github.com/mmcloughlin/avo/internal/api"
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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%q\n", api.ImportPath(api.IRPackage))
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b.Printf("\t%q\n", api.ImportPath(api.OperandPackage))
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b.Printf("\t%q\n", api.ImportPath("x86"))
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b.Printf(")\n\n")
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// Helper to reduce source code size a little.
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b.Printf("func (c *Context) addinstruction(i *ir.Instruction, err error) {\n")
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b.Printf("if err == nil { c.Instruction(i) }")
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b.Printf(" else { c.adderror(err) }\n")
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b.Printf("}\n\n")
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// Generate build functions.
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fns := api.InstructionsFunctions(is)
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for _, fn := range fns {
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b.function(fn)
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}
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return b.Result()
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}
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func (b *build) function(fn *api.Function) {
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s := fn.Signature()
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d := fn.Doc()
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// Context method.
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methoddoc := append([]string{}, d...)
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methoddoc = append(methoddoc, fmt.Sprintf("Construct and append a %s instruction to the active function.", fn.Opcode()))
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b.Comment(methoddoc...)
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b.Printf("func (c *Context) %s(%s) {\n", fn.Name(), s.ParameterList())
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b.Printf("c.addinstruction(x86.%s(%s))", fn.Name(), s.Arguments())
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b.Printf("}\n\n")
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// Global version.
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globaldoc := append([]string{}, methoddoc...)
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globaldoc = append(globaldoc, "Operates on the global context.")
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b.Comment(globaldoc...)
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b.Printf("func %s(%s) { ctx.%s(%s) }\n\n", fn.Name(), s.ParameterList(), fn.Name(), s.Arguments())
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}
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