SHA1H -- A64

<Sd>	Is the 32-bit name of the SIMD&FP destination register, encoded in the "Rd" field.

<Sn>	Is the 32-bit name of the SIMD&FP source register, encoded in the "Rn" field.

AArch64.CheckFPAdvSIMDEnabled(); bits(32) operand = V[n, 32]; // read element [0] only, [1-3] zeroed V[d, 32] = ROL(operand, 30);

If PSTATE.DIT is 1:

The execution time of this instruction is independent of:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.
The response of this instruction to asynchronous exceptions does not vary based on:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.

Internal version only: isa v33.64, AdvSIMD v29.12, pseudocode v2023-06_rel, sve v2023-06_rel ; Build timestamp: 2023-07-04T19:42

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
0	1	0	1	1	1	1	0	0	0	1	0	1	0	0	0	0	0	0	0	1	0	Rn					Rd

SHA1H

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
0	1	0	1	1	1	1	0	0	0	1	0	1	0	0	0	0	0	0	0	1	0	Rn					Rd

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
0	1	0	1	1	1	1	0	0	0	1	0	1	0	0	0	0	0	0	0	1	0	Rn					Rd

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
0	1	0	1	1	1	1	0	0	0	1	0	1	0	0	0	0	0	0	0	1	0	Rn					Rd