mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-28 19:25:38 +00:00
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
//go:build amd64 && !appengine && !noasm && gc
|
|
// +build amd64,!appengine,!noasm,gc
|
|
|
|
package zstd
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
type buildDtableAsmContext struct {
|
|
// inputs
|
|
stateTable *uint16
|
|
norm *int16
|
|
dt *uint64
|
|
|
|
// outputs --- set by the procedure in the case of error;
|
|
// for interpretation please see the error handling part below
|
|
errParam1 uint64
|
|
errParam2 uint64
|
|
}
|
|
|
|
// buildDtable_asm is an x86 assembly implementation of fseDecoder.buildDtable.
|
|
// Function returns non-zero exit code on error.
|
|
//
|
|
//go:noescape
|
|
func buildDtable_asm(s *fseDecoder, ctx *buildDtableAsmContext) int
|
|
|
|
// please keep in sync with _generate/gen_fse.go
|
|
const (
|
|
errorCorruptedNormalizedCounter = 1
|
|
errorNewStateTooBig = 2
|
|
errorNewStateNoBits = 3
|
|
)
|
|
|
|
// buildDtable will build the decoding table.
|
|
func (s *fseDecoder) buildDtable() error {
|
|
ctx := buildDtableAsmContext{
|
|
stateTable: &s.stateTable[0],
|
|
norm: &s.norm[0],
|
|
dt: (*uint64)(&s.dt[0]),
|
|
}
|
|
code := buildDtable_asm(s, &ctx)
|
|
|
|
if code != 0 {
|
|
switch code {
|
|
case errorCorruptedNormalizedCounter:
|
|
position := ctx.errParam1
|
|
return fmt.Errorf("corrupted input (position=%d, expected 0)", position)
|
|
|
|
case errorNewStateTooBig:
|
|
newState := decSymbol(ctx.errParam1)
|
|
size := ctx.errParam2
|
|
return fmt.Errorf("newState (%d) outside table size (%d)", newState, size)
|
|
|
|
case errorNewStateNoBits:
|
|
newState := decSymbol(ctx.errParam1)
|
|
oldState := decSymbol(ctx.errParam2)
|
|
return fmt.Errorf("newState (%d) == oldState (%d) and no bits", newState, oldState)
|
|
|
|
default:
|
|
return fmt.Errorf("buildDtable_asm returned unhandled nonzero code = %d", code)
|
|
}
|
|
}
|
|
return nil
|
|
}
|