Krait (processor)

Krait is an ARM-based central processing unit included in Snapdragon S4 System on chips. It is a successor to Qualcomm's Scorpion CPU and has architectural similarities to ARM Cortex-A15.

Architecture comparison table

	ARM11	ARM Cortex-A8	ARM Cortex-A9	ARM Cortex-A7	Qualcomm Scorpion	Qualcomm Krait	ARM Cortex-A15 MPCore
Decode	single-issue	2-wide	2-wide	partial dual-issue	2-wide	3-wide	3-wide
Pipeline depth	8 stages	13 stages	8 stages	8 stages	10 stages	11 stages	15/17-25 stages
Out of Order Execution	No	No	Yes	No	Yes, non-speculative	Yes	Yes
FPU	VFP11 (pipelined)	VFPv3 (not pipelined)	Optional VFPv3-D16 (pipelined)	Yes (pipelined)	VFPv3 (pipelined)	VFPv4 (pipelined)	VFPv4 (pipelined)
NEON	None	Yes (Partially 128-bit wide)	Optional MPE (64-bit wide)	Yes (64-bit wide)	Yes (128-bit wide)	Yes (128-bit wide)	Yes (128-bit wide)
Process Technology	90 nm	65/45 nm	45/40/32/28 nm	40/28 nm	65/45 nm	28 nm	32/28 nm
Execution Ports					3	7
L0 Cache						4kB + 4kB direct mapped
L1 Cache	Varying, typically 16 kB + 16 kB	32 kB + 32 kB	32 kB + 32 kB		32 kB + 32 kB	16 kB + 16 kB 4-way set associative	32 kB + 32 kB per core
L2 Cache	Varying, typically none	512 kB	1 MB		256 kB (Single-core)/512 kB (Dual-core)	1 MB 8-way set associative (Dual-core)/2 MB (Quad-core)	up to 4 MB per cluster, up to 8 MB per chip
Core Configurations	1	1	1, 2, 4	1, 2, 4	1, 2	2, 4	2, 4, 8(4×2)
DMIPS/MHz speed per core	1.25	2.0	2.5	1.9	2.1	3.3	3.5

For more info see Qualcomm's Snapdragon S4 Site.