- (multiple-value-bind (equal less-or-equal when-true when-false)
- ;; EQUAL and LESS-OR-EQUAL are the conditions for branching to TARGET.
- ;; WHEN-TRUE and WHEN-FALSE are the labels to branch to when we know
- ;; it's true and when we know it's false respectively.
- (if not-p
- (values :ne :a drop-through target)
- (values :e :na target drop-through))
- (%test-lowtag value when-false t lowtag al-loaded)
- (inst mov al-tn (make-ea :byte :base value :disp (- lowtag)))
- (do ((remaining headers (cdr remaining)))
- ((null remaining))
- (let ((header (car remaining))
- (last (null (cdr remaining))))
- (cond
- ((atom header)
- (inst cmp al-tn header)
- (if last
- (inst jmp equal target)
- (inst jmp :e when-true)))
- (t
- (let ((start (car header))
- (end (cdr header)))
- (unless (= start bignum-widetag)
- (inst cmp al-tn start)
- (inst jmp :b when-false)) ; was :l
- (inst cmp al-tn end)
- (if last
- (inst jmp less-or-equal target)
- (inst jmp :be when-true))))))) ; was :le
+ (multiple-value-bind (equal less-or-equal greater-or-equal when-true
+ when-false)
+ ;; EQUAL, LESS-OR-EQUAL, and GREATER-OR-EQUAL are the conditions
+ ;; for branching to TARGET. WHEN-TRUE and WHEN-FALSE are the
+ ;; labels to branch to when we know it's true and when we know
+ ;; it's false respectively.
+ (if not-p
+ (values :ne :a :b drop-through target)
+ (values :e :na :nb target drop-through))
+ (%test-lowtag value when-false t lowtag)
+ (do ((remaining headers (cdr remaining))
+ ;; It is preferable (smaller and faster code) to directly
+ ;; compare the value in memory instead of loading it into
+ ;; a register first. Find out if this is possible and set
+ ;; WIDETAG-TN accordingly. If impossible, generate the
+ ;; register load.
+ ;; Compared to x86 we additionally optimize the cases of a
+ ;; range starting with BIGNUM-WIDETAG or ending with
+ ;; COMPLEX-ARRAY-WIDETAG.
+ (widetag-tn (if (and (null (cdr headers))
+ (or (atom (car headers))
+ (= (caar headers) bignum-widetag)
+ (= (cdar headers) complex-array-widetag)))
+ (make-ea :byte :base value :disp (- lowtag))
+ (progn
+ (inst mov eax-tn (make-ea :dword :base value
+ :disp (- lowtag)))
+ al-tn))))
+ ((null remaining))
+ (let ((header (car remaining))
+ (last (null (cdr remaining))))
+ (cond
+ ((atom header)
+ (inst cmp widetag-tn header)
+ (if last
+ (inst jmp equal target)
+ (inst jmp :e when-true)))
+ (t
+ (let ((start (car header))
+ (end (cdr header)))
+ (cond
+ ((= start bignum-widetag)
+ (inst cmp widetag-tn end)
+ (if last
+ (inst jmp less-or-equal target)
+ (inst jmp :be when-true)))
+ ((= end complex-array-widetag)
+ (inst cmp widetag-tn start)
+ (if last
+ (inst jmp greater-or-equal target)
+ (inst jmp :b when-false)))
+ ((not last)
+ (inst cmp al-tn start)
+ (inst jmp :b when-false)
+ (inst cmp al-tn end)
+ (inst jmp :be when-true))
+ (t
+ (inst sub al-tn start)
+ (inst cmp al-tn (- end start))
+ (inst jmp less-or-equal target))))))))