From 2413835a30685e89fc992df4b37c62276457695a Mon Sep 17 00:00:00 2001 From: dtc <dtc> Date: Thu, 11 Nov 1999 16:09:49 +0000 Subject: [PATCH] Add the FFREEP instruction which is documented for the AMD Athlon and for which it provides a faster stack pop. --- compiler/x86/insts.lisp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/compiler/x86/insts.lisp b/compiler/x86/insts.lisp index fa54a39b4..758d1a3e5 100644 --- a/compiler/x86/insts.lisp +++ b/compiler/x86/insts.lisp @@ -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))) -- GitLab