sha1h

SHA1 Hash Update (A64)

SHA1H <Sd>, <Sn>

SHA1 hash update (AArch64 NEON).

Pseudocode Operation

Rd.S ← RotateLeft(Rn.S, 1)

Example

SHA1H s0, s1

Encoding

Binary Layout

01011110

31:24

00

23:22

10100

21:17

00000

16:12

10

11:10

Rn

9:5

Rd

4:0

 

Format Crypto

Opcode 0x5E280800

Extension Crypto

Operands

• Sd
  Destination 32-bit floating-point register
• Sn
  First source 32-bit floating-point register

Related

Other forms of sha1h

• sha1h SHA1 Hash Update (A32)

More in Crypto

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x5E280800	SHA1H <Sd>, <Sn>		A64		01011110 | 00 | 10100 | 00000 | 10 | Rn | Rd

Description

SHA1 fixed rotate.

Operation

AArch64.CheckFPAdvSIMDEnabled();

bits(32) operand = V[n, 32];    // read element [0] only,  [1-3] zeroed
V[d, 32] = ROL(operand, 30);