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# data
Constructing data sections in `avo`.
A data section is declared with the `GLOBL` function, and values are specified with `DATA`. The size of the data section will grow as values are added to it.
[embedmd]:# (asm.go go /.*GLOBL\(/ /^$/)
```go
bytes := GLOBL("bytes", RODATA|NOPTR)
DATA(0, U64(0x0011223344556677))
DATA(8, String("strconst"))
DATA(16, F32(math.Pi))
DATA(24, F64(math.Pi))
DATA(32, U32(0x00112233))
DATA(36, U16(0x4455))
DATA(38, U8(0x66))
DATA(39, U8(0x77))
```
The `GLOBL` function returns a reference which may be used in assembly code. The following function indexes into the data section just created.
[embedmd]:# (asm.go go /.*TEXT.*DataAt/ /RET.*/)
```go
TEXT("DataAt", NOSPLIT, "func(i int) byte")
Doc("DataAt returns byte i in the 'bytes' global data section.")
i := Load(Param("i"), GP64())
ptr := Mem{Base: GP64()}
LEAQ(bytes, ptr.Base)
b := GP8()
MOVB(ptr.Idx(i, 1), b)
Store(b, ReturnIndex(0))
RET()
```
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