diff options
Diffstat (limited to 'mu.arc')
| -rw-r--r-- | mu.arc | 48 |
1 files changed, 21 insertions, 27 deletions
diff --git a/mu.arc b/mu.arc index d965334f..62a4c8cf 100644 --- a/mu.arc +++ b/mu.arc @@ -209,6 +209,23 @@ :else (err "can't take len of non-array @operand"))) +; (operand field-offset) -> (base-addr field-type) +; operand can be a deref address +; operand can be scope-based +; base-addr returned is always global +(def record-info (operand field-offset) + (assert (is 'offset (ty field-offset)) "record index @field-offset must have type 'offset'") + (with (base addr.operand + basetype typeinfo.operand + idx (v field-offset)) + (when (pos 'deref metadata.operand) + (assert basetype!address "base @operand requests deref, but its type is not an address") + (= basetype (types* basetype!elem))) + (assert basetype!record "get on non-record @operand") + (assert (< -1 idx (len basetype!elems)) "@idx is out of bounds of @operand") + (list (+ base (apply + (map sz (firstn idx basetype!elems)))) + basetype!elems.idx))) + (def array-ref-addr (operand idx) (assert typeinfo.operand!array "aref-addr: not an array @operand") (unless (< -1 idx (array-len operand)) @@ -384,34 +401,11 @@ copy (m arg.0) get - (with (base (addr arg.0) ; integer (non-symbol) memory location including metadata - basetype (typeinfo arg.0) - idx (v arg.1)) ; literal integer - (assert (is 'offset (ty arg.1)) "second arg to 'get' must have type 'offset' @arg.1") - (when (pos 'deref (metadata arg.0)) - (assert basetype!address "get: base has deref but isn't an address @arg.0 @basetype") - (= basetype (types* basetype!elem))) - (assert basetype!record "get on invalid type @base") - (assert (< -1 idx (len basetype!elems)) "get: out-of-bounds access @idx vs @(len basetype!elems)") - (m `(,(+ base - (apply + (map sz - (firstn idx basetype!elems)))) - ,basetype!elems.idx - global))) + (let (addr type) (record-info arg.0 arg.1) + (m `(,addr ,type global))) get-address - (with (base (addr arg.0) ; integer (non-symbol) memory location including metadata - basetype (typeinfo arg.0) - idx (v arg.1)) ; literal integer - (assert (is 'offset (ty arg.1)) "second arg to 'get-addr' must have type 'offset' @arg.1") - (when (pos 'deref (metadata arg.0)) - (assert basetype!address "get-addr: base has deref but isn't an address @arg.0 @basetype") - (assert basetype!address) - (= basetype (types* basetype!elem))) - (assert basetype!record "get-addr on invalid type @base") - (assert (< -1 idx (len basetype!elems)) "get-addr: out-of-bounds access @idx vs @(len basetype!elems)") - (+ base - (apply + (map sz - (firstn idx basetype!elems))))) + (let (addr _) (record-info arg.0 arg.1) + addr) index (with (base arg.0 ; integer (non-symbol) memory location including metadata idx (m arg.1)) |