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- Log ----------------------------------------------------------------- commit 1e4040f32e973a1debcec908e4e69147c31a67ec Author: Raymond Toy toy.raymond@gmail.com Date: Sat Nov 29 00:12:55 2014 -0800

Add function to print a description of the value of the FPSCR (floating-point status and control register).

diff --git a/src/compiler/ppc/float.lisp b/src/compiler/ppc/float.lisp index c5c944b..e928619 100644 --- a/src/compiler/ppc/float.lisp +++ b/src/compiler/ppc/float.lisp @@ -938,6 +938,63 @@ (defknown ((setf floating-point-modes)) (float-modes) float-modes)

+(defun describe-floating-point-modes (&optional (modes (floating-point-modes))) + "Print a description of each bit of the floating point modes in MODES." + (format t "31 FX = ~B FP exception summary~%" + (ldb (byte 1 31) modes)) + (format t "30 FEX = ~B FP enabled exception summary~%" + (ldb (byte 1 30) modes)) + (format t "29 VX = ~B FP invalid operation exception summary~%" + (ldb (byte 1 29) modes)) + (format t "28 OX = ~B FP overflow exception (sticky)~%" + (ldb (byte 1 28) modes)) + (format t "27 UX = ~B FP underflow exception (sticky)~%" + (ldb (byte 1 27) modes)) + (format t "26 ZX = ~B FP zero divide exception (sticky)~%" + (ldb (byte 1 26) modes)) + (format t "25 XX = ~B FP inexact exception (sticky)~%" + (ldb (byte 1 25) modes)) + (format t "24 VXSNAN = ~B FP invalid operation with SNaN (sticky)~%" + (ldb (byte 1 24) modes)) + (format t "23 VXISI = ~B FP invalid operation for inf - inf (sticky)~%" + (ldb (byte 1 23) modes)) + (format t "22 VXIDI = ~B FP invalid operation for inf + inf (sticky)~%" + (ldb (byte 1 22) modes)) + (format t "21 VXZDZ = ~B FP invalid operation for 0/0 (sticky)~%" + (ldb (byte 1 21) modes)) + (format t "20 VXIMZ = ~B FP invalid operation for inf * 0 (sticky)~%" + (ldb (byte 1 20) modes)) + (format t "19 VXVC = ~B FP invalid operation for invalid compare (sticky)~%" + (ldb (byte 1 19) modes)) + (format t "18 FR = ~B FP fraction rounded~%" + (ldb (byte 1 18) modes)) + (format t "17 FI = ~B FP fraction inexact~%" + (ldb (byte 1 17) modes)) + (format t "12 FPRF = ~5,'0B FP result flags~%" + (ldb (byte 5 12) modes)) + (format t "11 Reserved~%") + (format t "10 VXSOFT = ~B FP invalid operation for software request (sticky)~%" + (ldb (byte 1 10) modes)) + (format t " 9 VXSQRT = ~B FP invalid operation for sqrt (sticky)~%" + (ldb (byte 1 9) modes)) + (format t " 8 VXCVI = ~B FP invalid operation for integer convert (sticky)~%" + (ldb (byte 1 8) modes)) + (format t " 7 VE = ~B FP invalid operation exception enable~%" + (ldb (byte 1 7) modes)) + (format t " 6 OE = ~B FP overflow exception enable~%" + (ldb (byte 1 6) modes)) + (format t " 5 UE = ~B FP underflow exception enable~%" + (ldb (byte 1 5) modes)) + (format t " 4 ZE = ~B FP zero divide exception enable~%" + (ldb (byte 1 4) modes)) + (format t " 3 XE = ~B FP inexact operation enable~%" + (ldb (byte 1 3) modes)) + (format t " 2 NI = ~B FP non-IEEE mode enable~%" + (ldb (byte 1 2) modes)) + (format t " 0 RN = ~2,'0B FP rounding control + (00 = nearest, 01 = zero, 10 = +inf, 11 = -inf~%" + (ldb (byte 2 0) modes))) + (define-vop (floating-point-modes) (:results (res :scs (unsigned-reg))) (:result-types unsigned-num)

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Summary of changes: src/compiler/ppc/float.lisp | 57 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+)

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