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* frv.cpu (mabshs): Explicitly sign-extend arguments of abs to DI.

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(DI-ext-HI, DI-ext-UHI, DI-ext-DI): New pmacros.
	(media-arith-sat-semantics): Explicitly sign- or zero-extend
	arguments of "operation" to DI using "mode" and the new pmacros.
This commit is contained in:
Hans-Peter Nilsson 2009-01-07 01:09:24 +00:00
parent 170ce85276
commit 6347aad80c
2 changed files with 21 additions and 4 deletions
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7
cpu/ChangeLog
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@ -1,3 +1,10 @@
2009-01-07 Hans-Peter Nilsson <hp@axis.com>
* frv.cpu (mabshs): Explicitly sign-extend arguments of abs to DI.
(DI-ext-HI, DI-ext-UHI, DI-ext-DI): New pmacros.
(media-arith-sat-semantics): Explicitly sign- or zero-extend
arguments of "operation" to DI using "mode" and the new pmacros.
2009-01-03 Hans-Peter Nilsson <hp@axis.com>
* cris.cpu (cris-implemented-writable-specregs-v32): Correct size

18
cpu/frv.cpu
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@ -1,6 +1,6 @@
; Fujitsu FRV opcode support, for GNU Binutils. -*- Scheme -*-
;
; Copyright 2000, 2001, 2003, 2004, 2007 Free Software Foundation, Inc.
; Copyright 2000, 2001, 2003, 2004, 2007, 2009 Free Software Foundation, Inc.
;
; Contributed by Red Hat Inc; developed under contract from Fujitsu.
;
@ -8229,18 +8229,28 @@
(set FRintk (c-raw-call SI "frv_ref_SI" FRintk))
(set arghi (halfword hi FRintj 0))
(set arglo (halfword lo FRintj 0))
(saturate-v (abs arghi) 32767 -32768 (msr-sie-fri-hi)
; We extend the argument before the abs operation so we can
; notice -32768 overflowing as 32768.
(saturate-v (abs (ext DI arghi)) 32767 -32768 (msr-sie-fri-hi)
(halfword hi FRintk 0))
(saturate-v (abs arglo) 32767 -32768 (msr-sie-fri-lo)
(saturate-v (abs (ext DI arglo)) 32767 -32768 (msr-sie-fri-lo)
(halfword lo FRintk 0)))
((fr400 (unit u-media-1)) (fr450 (unit u-media-1))
(fr550 (unit u-media)))
)
; How to extend from a mode to get the intended signedness.
(define-pmacro (DI-ext-HI x) (ext DI x))
(define-pmacro (DI-ext-UHI x) (zext DI x))
(define-pmacro (DI-ext-DI x) x)
(define-pmacro (media-arith-sat-semantics
operation arg1 arg2 res mode max min sie)
(sequence ((DI tmp))
(set tmp (operation arg1 arg2))
; Make sure we saturate at max/min against a value that is
; sign- or zero-extended appropriately from "mode".
(set tmp (operation DI
((.sym DI-ext- mode) arg1) ((.sym DI-ext- mode) arg2)))
(saturate-v tmp max min sie res))
)