cell.lisp

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;;;; Code object frobbing.

(define-vop (code-header-ref word-index-ref)
  (:translate code-header-ref)
  (:policy :fast-safe)
  (:variant 0 other-pointer-lowtag))

(define-vop (code-header-set word-index-set)
  (:translate code-header-set)
  (:policy :fast-safe)
  (:variant 0 other-pointer-lowtag))



;;;; raw instance slot accessors

(define-vop (raw-instance-ref/word)
  (:translate %raw-instance-ref/word)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg)))
  (:arg-types * positive-fixnum)
  (:results (value :scs (unsigned-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types unsigned-num)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (1- instance-slots-offset) n-word-bytes)
             instance-pointer-lowtag))
    (inst lwzx value object offset)))

(define-vop (raw-instance-set/word)
  (:translate %raw-instance-set/word)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg))
         (value :scs (unsigned-reg)))
  (:arg-types * positive-fixnum unsigned-num)
  (:results (result :scs (unsigned-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types unsigned-num)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (1- instance-slots-offset) n-word-bytes)
             instance-pointer-lowtag))
    (inst stwx value object offset)
    (move result value)))

(define-vop (raw-instance-ref/single)
  (:translate %raw-instance-ref/single)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg)))
  (:arg-types * positive-fixnum)
  (:results (value :scs (single-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types single-float)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (1- instance-slots-offset) n-word-bytes)
             instance-pointer-lowtag))
    (inst lfsx value object offset)))

(define-vop (raw-instance-set/single)
  (:translate %raw-instance-set/single)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg))
         (value :scs (single-reg) :target result))
  (:arg-types * positive-fixnum single-float)
  (:results (result :scs (single-reg)))
  (:result-types single-float)
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (1- instance-slots-offset) n-word-bytes)
             instance-pointer-lowtag))
    (inst stfsx value object offset)
    (unless (location= result value)
      (inst frsp result value))))

(define-vop (raw-instance-ref/double)
  (:translate %raw-instance-ref/double)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg)))
  (:arg-types * positive-fixnum)
  (:results (value :scs (double-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types double-float)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 2) n-word-bytes)
             instance-pointer-lowtag))
    (inst lfdx value object offset)))

(define-vop (raw-instance-set/double)
  (:translate %raw-instance-set/double)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg))
         (value :scs (double-reg) :target result))
  (:arg-types * positive-fixnum double-float)
  (:results (result :scs (double-reg)))
  (:result-types double-float)
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 2) n-word-bytes)
             instance-pointer-lowtag))
    (inst stfdx value object offset)
    (unless (location= result value)
      (inst fmr result value))))

(define-vop (raw-instance-ref/complex-single)
  (:translate %raw-instance-ref/complex-single)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg)))
  (:arg-types * positive-fixnum)
  (:results (value :scs (complex-single-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types complex-single-float)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 2) n-word-bytes)
             instance-pointer-lowtag))
    (inst lfsx (complex-single-reg-real-tn value) object offset)
    (inst addi offset offset n-word-bytes)
    (inst lfsx (complex-single-reg-imag-tn value) object offset)))

(define-vop (raw-instance-set/complex-single)
  (:translate %raw-instance-set/complex-single)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg))
         (value :scs (complex-single-reg) :target result))
  (:arg-types * positive-fixnum complex-single-float)
  (:results (result :scs (complex-single-reg)))
  (:result-types complex-single-float)
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 2) n-word-bytes)
             instance-pointer-lowtag))
    (let ((value-real (complex-single-reg-real-tn value))
          (result-real (complex-single-reg-real-tn result)))
      (inst stfsx value-real object offset)
      (unless (location= result-real value-real)
        (inst frsp result-real value-real)))
    (inst addi offset offset n-word-bytes)
    (let ((value-imag (complex-single-reg-imag-tn value))
          (result-imag (complex-single-reg-imag-tn result)))
      (inst stfsx value-imag object offset)
      (unless (location= result-imag value-imag)
        (inst frsp result-imag value-imag)))))

(define-vop (raw-instance-ref/complex-double)
  (:translate %raw-instance-ref/complex-double)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg)))
  (:arg-types * positive-fixnum)
  (:results (value :scs (complex-double-reg)))
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:result-types complex-double-float)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 4) n-word-bytes)
             instance-pointer-lowtag))
    (inst lfdx (complex-double-reg-real-tn value) object offset)
    (inst addi offset offset (* 2 n-word-bytes))
    (inst lfdx (complex-double-reg-imag-tn value) object offset)))

(define-vop (raw-instance-set/complex-double)
  (:translate %raw-instance-set/complex-double)
  (:policy :fast-safe)
  (:args (object :scs (descriptor-reg))
         (index :scs (any-reg))
         (value :scs (complex-double-reg) :target result))
  (:arg-types * positive-fixnum complex-double-float)
  (:results (result :scs (complex-double-reg)))
  (:result-types complex-double-float)
  (:temporary (:scs (non-descriptor-reg)) offset)
  (:generator 5
    (loadw offset object 0 instance-pointer-lowtag)
    ;; offset = (offset >> n-widetag-bits) << 2
    (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
    (inst subf offset index offset)
    (inst addi
          offset
          offset
          (- (* (- instance-slots-offset 4) n-word-bytes)
             instance-pointer-lowtag))
    (let ((value-real (complex-double-reg-real-tn value))
          (result-real (complex-double-reg-real-tn result)))
      (inst stfdx value-real object offset)
      (unless (location= result-real value-real)
        (inst fmr result-real value-real)))
    (inst addi offset offset (* 2 n-word-bytes))
    (let ((value-imag (complex-double-reg-imag-tn value))
          (result-imag (complex-double-reg-imag-tn result)))
      (inst stfdx value-imag object offset)
      (unless (location= result-imag value-imag)
        (inst fmr result-imag value-imag)))))