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rework the vm support for wide strings

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* libguile/_scm.h (SCM_OBJCODE_MINOR_VERSION): Bump.

* libguile/vm-engine.c (vm_error_bad_wide_string_length): New error
  case.

* libguile/vm-i-loader.c (load-unsigned-integer, load-integer)
  (load-keyword): Remove these instructions. The former two are
  obsoleted by make-int64/make-uint64, the latter via make-keyword.
  (load-string): Only handle narrow strings.
  (load-symbol): Only handle narrow symbols. The wide case is handled
  via make-symbol.
  (load-wide-string): New instruction, for wide strings.

* libguile/vm-i-system.c (define): Move here from loaders.c, as now it
  just takes a sym on the stack.
  (make-keyword, make-symbol): New instructions.

* module/language/assembly.scm: Remove removed instructions. No more
  width byte in load-string etc.

* module/language/assembly/compile-bytecode.scm (write-bytecode): Adapt
  to change in instruction set.

* module/language/glil/compile-assembly.scm (glil->assembly): Compile
  define by pushing the sym then emitting (define).
  (dump-object): Dump narrow and wide strings differently. Use
  make-keyword and make-symbol as appropriate.

* module/language/tree-il/compile-glil.scm (flatten): When compiling a
  ref to a primitive (not a call), first see if the primitive is
  actually bound in the root module. (That's not the case with e.g.
  bytevector-u8-ref).

* module/system/xref.scm (program-callee-rev-vars): Don't parse out
  "nexts".

* test-suite/tests/asm-to-bytecode.test ("compiler"): Adapt to bytecode
  format change.
This commit is contained in:
Andy Wingo 2009-08-12 16:33:49 +02:00
parent 6cf4830798
commit 94ff26b96b
11 changed files with 101 additions and 201 deletions
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18
module/language/assembly.scm
View file

@ -34,30 +34,21 @@
;; lengths are encoded in 3 bytes
(define *len-len* 3)
;; the number of bytes per string character is encoded in 1 byte
(define *width-len* 1)
(define (byte-length assembly)
(pmatch assembly
(,label (guard (not (pair? label)))
0)
((load-unsigned-integer ,str)
(+ 1 *len-len* (string-length str)))
((load-integer ,str)
(+ 1 *len-len* (string-length str)))
((load-number ,str)
(+ 1 *len-len* (string-length str)))
((load-string ,str)
(+ 1 *len-len* *width-len* (* (string-width str) (string-length str))))
(+ 1 *len-len* (string-length str)))
((load-wide-string ,str)
(+ 1 *len-len* (* 4 (string-length str))))
((load-symbol ,str)
(+ 1 *len-len* *width-len* (* (string-width str) (string-length str))))
((load-keyword ,str)
(+ 1 *len-len* *width-len* (* (string-width str) (string-length str))))
(+ 1 *len-len* (string-length str)))
((load-array ,bv)
(+ 1 *len-len* (bytevector-length bv)))
((define ,str)
(+ 1 *len-len* *width-len* (* (string-width str) (string-length str))))
((load-program ,nargs ,nrest ,nlocs ,labels ,len ,meta . ,code)
(+ 1 *program-header-len* len (if meta (1- (byte-length meta)) 0)))
((,inst . _) (guard (>= (instruction-length inst) 0))
@ -171,5 +162,4 @@
n4)))
((load-string ,s) s)
((load-symbol ,s) (string->symbol s))
((load-keyword ,s) (symbol->keyword (string->symbol s)))
(else #f)))

19
module/language/assembly/compile-bytecode.scm
View file

@ -65,11 +65,13 @@
(write-byte (logand (ash x -8) 255))
(write-byte (logand (ash x -16) 255))
(write-byte (logand (ash x -24) 255)))
(define (write-uint32 x) (case byte-order
((1234) (write-uint32-le x))
((4321) (write-uint32-be x))
(else (error "unknown endianness" byte-order))))
(define (write-uint32 x)
(case byte-order
((1234) (write-uint32-le x))
((4321) (write-uint32-be x))
(else (error "unknown endianness" byte-order))))
(define (write-wide-string s)
(write-loader-len (* 4 (string-length s)))
(string-for-each (lambda (c) (write-uint32 (char->integer c))) s))
(define (write-loader-len len)
(write-byte (ash len -16))
@ -133,14 +135,11 @@
;; `scm_c_make_objcode_slice ()'.
(write-bytecode meta write get-addr '()))))
((make-char32 ,x) (write-uint32-be x))
((load-unsigned-integer ,str) (write-loader str))
((load-integer ,str) (write-loader str))
((load-number ,str) (write-loader str))
((load-string ,str) (write-sized-loader str))
((load-symbol ,str) (write-sized-loader str))
((load-keyword ,str) (write-sized-loader str))
((load-string ,str) (write-loader str))
((load-wide-string ,str) (write-wide-string str))
((load-symbol ,str) (write-loader str))
((load-array ,bv) (write-bytevector bv))
((define ,str) (write-sized-loader str))
((br ,l) (write-break l))
((br-if ,l) (write-break l))
((br-if-not ,l) (write-break l))

27
module/language/assembly/decompile-bytecode.scm
View file

@ -96,16 +96,6 @@
(lp (cons exp out))))))))))
(define (decode-bytecode pop)
(define (get1 bytes-per-char)
(if (= bytes-per-char 1)
(pop)
(let* ((a (pop))
(b (pop))
(c (pop))
(d (pop)))
(if (= byte-order 1234)
(+ (ash d 24) (ash c 16) (ash b 8) a)
(+ (ash a 24) (ash b 16) (ash c 8) d)))))
(and=> (pop)
(lambda (opcode)
(let ((inst (opcode->instruction opcode)))
@ -117,29 +107,24 @@
;; the negative length indicates a variable length
;; instruction
(let* ((make-sequence
(if (eq? inst 'load-array)
(if (or (memq inst '(load-array load-wide-string)))
make-bytevector
make-string))
(sequence-set!
(if (eq? inst 'load-array)
(if (or (memq inst '(load-array load-wide-string)))
bytevector-u8-set!
(lambda (str pos value)
(string-set! str pos (integer->char value)))))
(len (let* ((a (pop)) (b (pop)) (c (pop)))
(+ (ash a 16) (ash b 8) c)))
(bytes-per-count
(if (or (eq? inst 'load-string)
(eq? inst 'load-symbol)
(eq? inst 'load-keyword)
(eq? inst 'define))
(pop)
1))
(seq (make-sequence len)))
(let lp ((i 0))
(if (= i len)
`(,inst ,seq)
`(,inst ,(if (eq? inst 'load-wide-string)
(utf32->string seq)
seq))
(begin
(sequence-set! seq i (get1 bytes-per-count))
(sequence-set! seq i (pop))
(lp (1+ i)))))))
(else
;; fixed length

19
module/language/glil/compile-assembly.scm
View file

@ -318,8 +318,8 @@
,(modulo i 256))))
object-alist)))))
((define)
(emit-code `((define ,(symbol->string name))
(variable-set))))
(emit-code `(,@(dump-object name addr)
(define))))
(else
(error "unknown toplevel var kind" op name))))
@ -391,11 +391,20 @@
((number? x)
`((load-number ,(number->string x))))
((string? x)
`((load-string ,x)))
(case (string-width x)
((1) `((load-string ,x)))
((4) (align-code `(load-wide-string ,x) addr 4 4))
(else (error "bad string width" x))))
((symbol? x)
`((load-symbol ,(symbol->string x))))
(let ((str (symbol->string x)))
(case (string-width str)
((1) `((load-symbol ,str)))
((4) `(,@(dump-object str addr)
(make-symbol)))
(else (error "bad string width" str)))))
((keyword? x)
`((load-keyword ,(symbol->string (keyword->symbol x)))))
`(,@(dump-object (keyword->symbol x) addr)
(make-keyword)))
((list? x)
(let ((tail (let ((len (length x)))
(if (>= len 65536) (too-long "list"))

9
module/language/tree-il/compile-glil.scm
View file

@ -492,11 +492,16 @@
((tail push vals)
(emit-code src (make-glil-toplevel 'ref name))))
(maybe-emit-return))
(else
(pk 'ew-the-badness x (current-module) (fluid-ref *comp-module*))
((module-variable the-root-module name)
(case context
((tail push vals)
(emit-code src (make-glil-module 'ref '(guile) name #f))))
(maybe-emit-return))
(else
(case context
((tail push vals)
(emit-code src (make-glil-module
'ref (module-name (fluid-ref *comp-module*)) name #f))))
(maybe-emit-return))))
((<lexical-ref> src name gensym)