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This commit is contained in:
Kartik Agaram 2020-05-24 08:02:11 -07:00
parent 4335309233
commit d89af9bdfa
1 changed files with 14 additions and 9 deletions
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23
mu_instructions
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@ -166,24 +166,29 @@ var/reg: (addr T) <- address var2: T
Array operations (TODO: bounds-checking)
var/reg <- length arr/reg2: (addr array T)
=> "8b/-> *" reg2 " " reg "/r32"
var/reg <- index arr/rega: (addr array T), idx/regi: int # if size(T) is 4 or 8
=> "8d/copy-address *(" rega "+" regi "<<" log2(size(T)) "+4) " reg "/r32"
var/reg <- index arr/rega: (addr array T), idx/regi: int
| if size-of(T) is 4 or 8
=> "8d/copy-address *(" rega "+" regi "<<" log2(size-of(T)) "+4) " reg "/r32"
var/reg <- index arr: (array T sz), idx/regi: int
=> "8d/copy-address *(ebp+" regi "<<" log2(size(T)) "+" (arr.stack-offset + 4) ") " reg "/r32"
=> "8d/copy-address *(ebp+" regi "<<" log2(size-of(T)) "+" (arr.stack-offset + 4) ") " reg "/r32"
var/reg <- index arr/rega: (addr array T), n
=> "8d/copy-address *(" rega "+" (n*size(T)+4) ") " reg "/r32"
=> "8d/copy-address *(" rega "+" (n*size-of(T)+4) ") " reg "/r32"
var/reg <- index arr: (array T sz), n
=> "8d/copy-address *(ebp+" (arr.stack-offset+4+n*size(T)) ") " reg "/r32"
=> "8d/copy-address *(ebp+" (arr.stack-offset+4+n*size-of(T)) ") " reg "/r32"
var/reg: (offset T) <- compute-offset arr: (addr array T), idx/regi: int # arr can be in reg or mem
=> "69/multiply %" regi " " size(T) "/imm32 " reg "/r32"
=> "69/multiply %" regi " " size-of(T) "/imm32 " reg "/r32"
var/reg: (offset T) <- compute-offset arr: (addr array T), idx: int # arr can be in reg or mem
=> "69/multiply *(ebp+" idx.stack-offset ") " size(T) "/imm32 " reg "/r32"
=> "69/multiply *(ebp+" idx.stack-offset ") " size-of(T) "/imm32 " reg "/r32"
var/reg <- index arr/rega: (addr array T), o/rego: offset
=> "8d/copy-address *(" rega "+" rego "+4) " reg "/r32"
Computing the length of an array can get complex.
var/reg <- length arr/reg2: (addr array T)
| if T is byte (TODO)
=> "8b/-> *" reg2 " " reg "/r32"
# User-defined types
If a record (product) type T was defined to have elements a, b, c, ... of