9c70781236
Bump CI Go versions to 1.16 and 1.17. Update build tags with `go:build` equivalents. Upgrade asmfmt tool for new `go:build` support. Updates #183
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.
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.
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()