Compute vector address
Optionally sign or zero-extend the least significant 32-bits of each element from a vector of offsets or indices in the second source vector, scale each index by 2, 4 or 8, add to a vector of base addresses from the first source vector, and place the resulting addresses in the destination vector. This instruction is unpredicated.
This instruction is illegal when executed in Streaming SVE mode, unless FEAT_SME_FA64 is implemented and enabled.
It has encodings from 3 classes: Packed offsets , Unpacked 32-bit signed offsets and Unpacked 32-bit unsigned offsets
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0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | sz | 1 | Zm | 1 | 0 | 1 | 0 | msz | Zn | Zd |
if !IsFeatureImplemented(FEAT_SVE) then UNDEFINED; constant integer esize = 32 << UInt(sz); constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer d = UInt(Zd); constant integer osize = esize; constant boolean unsigned = TRUE; constant integer mbytes = 1 << UInt(msz);
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0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | Zm | 1 | 0 | 1 | 0 | msz | Zn | Zd |
if !IsFeatureImplemented(FEAT_SVE) then UNDEFINED; constant integer esize = 64; constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer d = UInt(Zd); constant integer osize = 32; constant boolean unsigned = FALSE; constant integer mbytes = 1 << UInt(msz);
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0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | Zm | 1 | 0 | 1 | 0 | msz | Zn | Zd |
if !IsFeatureImplemented(FEAT_SVE) then UNDEFINED; constant integer esize = 64; constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer d = UInt(Zd); constant integer osize = 32; constant boolean unsigned = TRUE; constant integer mbytes = 1 << UInt(msz);
<Zd> |
Is the name of the destination scalable vector register, encoded in the "Zd" field. |
<T> |
Is the size specifier,
encoded in
|
<Zn> |
Is the name of the base scalable vector register, encoded in the "Zn" field. |
<Zm> |
Is the name of the offset scalable vector register, encoded in the "Zm" field. |
<mod> |
Is the index extend and shift specifier,
encoded in
|
<amount> |
Is the index shift amount,
encoded in
|
CheckNonStreamingSVEEnabled(); constant integer VL = CurrentVL; constant integer elements = VL DIV esize; constant bits(VL) base = Z[n, VL]; constant bits(VL) offs = Z[m, VL]; bits(VL) result; for e = 0 to elements-1 constant bits(esize) addr = Elem[base, e, esize]; constant integer offset = Int(Elem[offs, e, esize]<osize-1:0>, unsigned); Elem[result, e, esize] = addr + (offset * mbytes); Z[d, VL] = result;
If FEAT_SVE2 is implemented or FEAT_SME is implemented, then if PSTATE.DIT is 1:
Internal version only: aarchmrs v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45
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