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Commit e28e38ce authored by Raymond Toy's avatar Raymond Toy
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Add better description of the output of x87-floating-point-modes

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...@@ -2340,6 +2340,13 @@ ...@@ -2340,6 +2340,13 @@
;; ;;
;; When one of the mask bits (0-5) is set, then that exception is ;; When one of the mask bits (0-5) is set, then that exception is
;; masked so that no exception is generated. ;; masked so that no exception is generated.
;;
;; Returns the control and status words merged into one. The low 16
;; bits contains the control word with the exception mask bits
;; inverted to indicate exception enable bits. The high 16 bits
;; contains the status word, but the top 8 bits of the status word are
;; cleared, effectively removing the condition code, top-of-stack
;; bits, and the FPU busy bit.
(define-vop (x87-floating-point-modes) (define-vop (x87-floating-point-modes)
(:results (res :scs (unsigned-reg))) (:results (res :scs (unsigned-reg)))
(:result-types unsigned-num) (:result-types unsigned-num)
......
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