SHA512 Schedule Update 0 takes the values from the two 128-bit source SIMD&FP registers and produces a 128-bit output value that combines the gamma0 functions of two iterations of the SHA512 schedule update that are performed after the first 16 iterations within a block. It returns this value to the destination SIMD&FP register.
This instruction is implemented only when FEAT_SHA512 is implemented.
| 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 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | Rn | Rd | ||||||||
if !HaveSHA512Ext() then UNDEFINED; integer d = UInt(Rd); integer n = UInt(Rn);
| <Vd> |
Is the name of the SIMD&FP source and destination register, encoded in the "Rd" field. |
| <Vn> |
Is the name of the second SIMD&FP source register, encoded in the "Rn" field. |
AArch64.CheckFPAdvSIMDEnabled(); bits(64) sig0; bits(128) Vtmp; bits(128) X = V[n]; bits(128) W = V[d]; sig0 = ROR(W<127:64>, 1) EOR ROR(W<127:64>, 8) EOR ('0000000':W<127:71>); Vtmp<63:0> = W<63:0> + sig0; sig0 = ROR(X<63:0>, 1) EOR ROR(X<63:0>, 8) EOR ('0000000':X<63:7>); Vtmp<127:64> = W<127:64> + sig0; V[d] = Vtmp;
If PSTATE.DIT is 1:
Internal version only: isa v33.11seprel, AdvSIMD v29.05, pseudocode v2021-09_rel, sve v2021-09_rc3d ; Build timestamp: 2021-10-06T11:41
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