The Old New Thing

The AArch64 processor (aka arm64), part 9: Sign and zero extension

August 5, 2022 Aug 5, 2022 08/5/22

Raymond Chen

Nothing new here, but old things being used in clever ways.

The AArch64 processor (aka arm64), part 8: Bit shifting and rotation

August 4, 2022 Aug 4, 2022 08/4/22

Raymond Chen

Sliding around.

The AArch64 processor (aka arm64), part 7: Bitfield manipulation

August 3, 2022 Aug 3, 2022 08/3/22

Raymond Chen

Peeking inside the words.

The AArch64 processor (aka arm64), part 6: Bitwise operations

August 2, 2022 Aug 2, 2022 08/2/22

Raymond Chen

And their very strange immediates.

The AArch64 processor (aka arm64), part 5: Multiplication and division

August 1, 2022 Aug 1, 2022 08/1/22

Raymond Chen

Arithmetic gets harder.

The AArch64 processor (aka arm64), part 4: Addition and subtraction

July 29, 2022 Jul 29, 2022 07/29/22

Raymond Chen

Starting with the basic arithmetic.

The AArch64 processor (aka arm64), part 3: Addressing modes

July 28, 2022 Jul 28, 2022 07/28/22

Raymond Chen

The ways of accessing memory.

The AArch64 processor (aka arm64), part 2: Extended register operations

July 27, 2022 Jul 27, 2022 07/27/22

Raymond Chen

The weird ways of transforming the value in a register.

The AArch64 processor (aka arm64), part 1: Introduction

July 26, 2022 Jul 26, 2022 07/26/22

Raymond Chen

Make it a double.

Yes, the 8086 wanted to be mechanically translatable from the 8080, but why not add the ability to indirect through AX, CX and DX?

July 25, 2022 Jul 25, 2022 07/25/22

Raymond Chen

So many addressing modes, so little space.