/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
.text
#ifndef __clang__
.machine e500x2
#endif
/*
* Lintstub: void vec_load_from_vreg(const struct vreg *);
*/
ENTRY(vec_load_from_vreg)
/*
* Load and initialize the accumulator. Don't care about trashing
* r0's high half since we are about to load it.
*/
evldd %r0,(8 << 4)(%r3)
evmra %r0,%r0
/*
* SPEFSCR is in the trapframe.
*/
/*
* Since the high part of the register is saved in vreg (because we
* are loading it), and we know SPE is on (to load it), just load two
* high parts at one time and merge appropriately. For each even-odd
* register pair, the evldw will load high part for the even register
* in the high 32 bits and the high part for the odd register in the
* low 32 bits.
*
* The evmergelo will move the lower half of r0 to the high half of the
* destination register and evmergehilo will merge the high half of r0
* and lower half of the other register.
*/
evldw %r0,(30 << 2)(%r3)
evmergelo %r31,%r0,%r31; evmergehilo %r30,%r0,%r30
evldw %r0,(28 << 2)(%r3)
evmergelo %r29,%r0,%r29; evmergehilo %r28,%r0,%r28
evldw %r0,(26 << 2)(%r3)
evmergelo %r27,%r0,%r27; evmergehilo %r26,%r0,%r26
evldw %r0,(24 << 2)(%r3)
evmergelo %r25,%r0,%r25; evmergehilo %r24,%r0,%r24
evldw %r0,(22 << 2)(%r3)
evmergelo %r23,%r0,%r23; evmergehilo %r22,%r0,%r22
evldw %r0,(20 << 2)(%r3)
evmergelo %r21,%r0,%r21; evmergehilo %r20,%r0,%r20
evldw %r0,(18 << 2)(%r3)
evmergelo %r19,%r0,%r19; evmergehilo %r18,%r0,%r18
evldw %r0,(16 << 2)(%r3)
evmergelo %r17,%r0,%r17; evmergehilo %r16,%r0,%r16
evldw %r0,(14 << 2)(%r3)
evmergelo %r15,%r0,%r15; evmergehilo %r14,%r0,%r14
evldw %r0,(12 << 2)(%r3)
evmergelo %r13,%r0,%r13; evmergehilo %r12,%r0,%r12
/*
* Done with callee-saved registers. For caller-saved we can just
* trash the register contents. So load the two words with the high
* halves into the appropriate register and merge the half for the
* next register into it.
*/
evldw %r10,(10 << 2)(%r3)
evmergelo %r11,%r10,%r11
evldw %r8,(8 << 2)(%r3)
evmergelo %r9,%r8,%r9
evldw %r6,(6 << 2)(%r3)
evmergelo %r7,%r6,%r7
evldw %r4,(4 << 2)(%r3)
evmergelo %r5,%r4,%r5
/*
* R2 isn't a callee-saved, so load into r0 because we still need r3
*/
evldw %r0,(2 << 2)(%r3)
evmergelo %r3,%r0,%r3; evmergehilo %r2,%r0,%r2
evldd %r0,(0 << 2)(%r3)
evmergelo %r1,%r0,%r1 /* why bother? */
