Northern Islands

From dankwiki

AMD's first GPU released under the AMD (as opposed to ATI) brand. Manufactured at TSMC on a 40nm process. The Cayman and Antilles 69x0 parts introduced VLIW4 to AMD GPUs.

VLIW5 vs VLIW4

VLIW5 (Caicos, Turks, Juniper, Barts)

  • 4 32-bit FP MAD
    • Or 2 64-bit FP MUL or ADD
    • Or 1 64-bit FP MAD
    • Or 4 24-bit Int MUL or ADD
  • 1 transcendental
    • Or 1 32-bit FP MAD

VLIW4 (Cayman, Antilles)

  • 4 32-bit FP MAD/MUL/ADD
    • Or 2 64-bit FP ADD
    • Or 1 64-bit FP MAD/FMA/MUL
    • Or 4 24-bit INT MAD/MUL/ADD
    • Or 4 32-bit INT ADD/Bitwise
    • Or 1 32-bit MAD/MUL
    • Or 1 64-bit ADD
    • Or 1 transcendental plus 1 32-bit FP MAD