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Merge pull request #4938 from ollama/mxyng/fix-byte-order

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fix parsing big endian gguf
This commit is contained in:
Michael Yang 2024-06-10 09:38:12 -07:00 committed by GitHub
commit f5f245cc15
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GPG key ID: B5690EEEBB952194
2 changed files with 19 additions and 9 deletions
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13
llm/ggml.go
View file

@ -231,8 +231,7 @@ const (
// Magic constant for `ggla` files (LoRA adapter).
FILE_MAGIC_GGLA = 0x67676C61
// Magic constant for `gguf` files (versioned, gguf)
FILE_MAGIC_GGUF_LE = 0x46554747
FILE_MAGIC_GGUF_BE = 0x47475546
FILE_MAGIC_GGUF = 0x46554747
)
var ErrUnsupportedFormat = errors.New("unsupported model format")
@ -247,7 +246,7 @@ func DetectGGMLType(b []byte) string {
return "ggjt"
case FILE_MAGIC_GGLA:
return "ggla"
case FILE_MAGIC_GGUF_LE, FILE_MAGIC_GGUF_BE:
case FILE_MAGIC_GGUF:
return "gguf"
default:
return ""
@ -255,21 +254,19 @@ func DetectGGMLType(b []byte) string {
}
func DecodeGGML(rs io.ReadSeeker) (*GGML, int64, error) {
var magic uint32
var magic [4]byte
if err := binary.Read(rs, binary.LittleEndian, &magic); err != nil {
return nil, 0, err
}
var c container
switch magic {
switch binary.LittleEndian.Uint32(magic[:]) {
case FILE_MAGIC_GGML, FILE_MAGIC_GGMF, FILE_MAGIC_GGJT:
return nil, 0, ErrUnsupportedFormat
case FILE_MAGIC_GGLA:
c = &containerGGLA{}
case FILE_MAGIC_GGUF_LE:
case FILE_MAGIC_GGUF:
c = &containerGGUF{ByteOrder: binary.LittleEndian}
case FILE_MAGIC_GGUF_BE:
c = &containerGGUF{ByteOrder: binary.BigEndian}
default:
return nil, 0, errors.New("invalid file magic")
}

15
llm/gguf.go
View file

@ -36,10 +36,23 @@ func (c *containerGGUF) Name() string {
}
func (c *containerGGUF) Decode(rs io.ReadSeeker) (model, error) {
if err := binary.Read(rs, c.ByteOrder, &c.Version); err != nil {
var version [4]byte
if err := binary.Read(rs, c.ByteOrder, &version); err != nil {
return nil, err
}
// if the lower 16 bits are 0, the byte order is probably wrong
if c.ByteOrder.Uint32(version[:])&1<<4 == 0 {
switch c.ByteOrder {
case binary.LittleEndian:
c.ByteOrder = binary.BigEndian
case binary.BigEndian:
c.ByteOrder = binary.LittleEndian
}
}
c.Version = c.ByteOrder.Uint32(version[:])
var err error
switch c.Version {
case 1: