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Commit 2413835a authored by dtc's avatar dtc
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Add the FFREEP instruction which is documented for the AMD Athlon and

for which it provides a faster stack pop.
parent 1fec38cf
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......@@ -7,7 +7,7 @@
;;; Scott Fahlman or slisp-group@cs.cmu.edu.
;;;
(ext:file-comment
"$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/x86/insts.lisp,v 1.17 1999/09/28 16:07:50 dtc Exp $")
"$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/x86/insts.lisp,v 1.18 1999/11/11 16:09:49 dtc Exp $")
;;;
;;; **********************************************************************
;;;
......@@ -2500,6 +2500,14 @@
(:emitter
(emit-byte segment #b11011101)
(emit-fp-op segment dest #b000)))
;;;
;;; Free fp register and pop the stack.
;;;
(define-instruction ffreep (segment dest)
(:printer floating-point-fp ((op '(#b111 #b000))))
(:emitter
(emit-byte segment #b11011111)
(emit-fp-op segment dest #b000)))
(define-instruction fabs (segment)
(:printer floating-point-no ((op #b00001)))
......
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