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authorJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
commite64ac02c24b43659048622714afdc92fedf561fa (patch)
tree37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/alpha/divl.S
parenta20c2b3c87aebc7d4b090c622d36480263b80042 (diff)
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Move all files into ports/ subdirectory in preparation for merge with glibcglibc-2.16-ports-before-merge
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+/* Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "div_libc.h"
+
+/* 32-bit signed int divide. This is not a normal C function. Argument
+ registers are t10 and t11, the result goes in t12. Only t12 and AT may
+ be clobbered.
+
+ The FPU can handle all input values except zero. Whee!
+
+ The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
+ for cvttq/c even without /sui being set. It will not, however, properly
+ raise the exception, so we don't have to worry about FPCR_INED being clear
+ and so dying by SIGFPE. */
+
+#ifndef EXTEND
+#define EXTEND(S,D) sextl S, D
+#endif
+
+ .text
+ .align 4
+ .globl __divl
+ .type __divl, @funcnoplt
+ .usepv __divl, no
+
+ cfi_startproc
+ cfi_return_column (RA)
+__divl:
+ lda sp, -FRAME(sp)
+ cfi_def_cfa_offset (FRAME)
+ CALL_MCOUNT
+ stt $f0, 0(sp)
+ excb
+ beq Y, DIVBYZERO
+
+ stt $f1, 8(sp)
+ stt $f2, 16(sp)
+ cfi_rel_offset ($f0, 0)
+ cfi_rel_offset ($f1, 8)
+ cfi_rel_offset ($f2, 16)
+ mf_fpcr $f2
+
+ EXTEND (X, RV)
+ EXTEND (Y, AT)
+ _ITOFT2 RV, $f0, 24, AT, $f1, 32
+ cvtqt $f0, $f0
+ cvtqt $f1, $f1
+ divt/c $f0, $f1, $f0
+ cvttq/c $f0, $f0
+ excb
+ mt_fpcr $f2
+ _FTOIT $f0, RV, 24
+
+ ldt $f0, 0(sp)
+ ldt $f1, 8(sp)
+ ldt $f2, 16(sp)
+ lda sp, FRAME(sp)
+ cfi_restore ($f0)
+ cfi_restore ($f1)
+ cfi_restore ($f2)
+ cfi_def_cfa_offset (0)
+ sextl RV, RV
+ ret $31, (RA), 1
+
+ cfi_endproc
+ .size __divl, .-__divl
+
+ DO_DIVBYZERO