"VLDR S0,=1.0" rejected, but accepts "VLDR S0,=1" and generates bad code.

[Dan Lewis]

The pseudo-instruction (identified as a pseudo-instruction by the equals sign)

    VLDR S0,=constant

should be replaced by one of:

    VMOV S0,#constant // "#" may be omitted using directive, ".syntax unified"

or:

    VLDR S0,label
    ...
label: .float constant

However, it only "seems" to work when the constant is an integer. The assembler rejects "VLDR S0,=1.0" with the error message:

    "Error: garbage following instruction -- 'vldr S0,=1.0'

but happily accepts "VLDR S0,=1" (Note: It also happily accepts "VLDR S0,=label", where "label" is the label on a .float directive, and is apparently loading the address of the label into S0!) However the latter does NOT load the floating-point representation of 1.0 (0x3F800000) into S0. It loads the integer representation of 1 (0x00000001) into S0.

This is using the 8-2018-q4-update of GNU ARM Embedded Toolchain.