Smalltalk › Squeak › Squeak VM

Immediate Characters

_‹ Previous Topic Next Topic _›

Classic

List

Threaded

3 messages Options

Ben Coman

Immediate Characters

Quick question...
What is the internal representation of immediate characters is?

Eliot Miranda-2

Re: Immediate Characters

Hi Ben,

> On Jan 18, 2019, at 4:21 PM, Ben Coman <[hidden email]> wrote:
>
> Quick question...
> What is the internal representation of immediate characters is?

In 32-bit Spur they’re 30 bit unsigned values shifted right by 2 bits with a tag of 2r10. In 64-bit Spur they’re 30 bit unsigned values shifted right by 3 bits with a tag of 2r010.

Bert Freudenberg

Re: Immediate Characters

On Fri, Jan 18, 2019 at 8:30 PM Eliot Miranda <[hidden email]> wrote:

Hi Ben,

> On Jan 18, 2019, at 4:21 PM, Ben Coman <[hidden email]> wrote:
>
> Quick question...
> What is the internal representation of immediate characters is?

In 32-bit Spur they’re 30 bit unsigned values shifted right by 2 bits with a tag of 2r10. In 64-bit Spur they’re 30 bit unsigned values shifted right by 3 bits with a tag of 2r010.

... and by "shifted right" Eliot means "shifted left", that is, towards higher-order bits.