diff options
Diffstat (limited to 'sysdeps/alpha/reml.S')
| -rw-r--r-- | sysdeps/alpha/reml.S | 84 |
1 files changed, 79 insertions, 5 deletions
diff --git a/sysdeps/alpha/reml.S b/sysdeps/alpha/reml.S index 8c00365ee3..c4eb426c5a 100644 --- a/sysdeps/alpha/reml.S +++ b/sysdeps/alpha/reml.S @@ -1,6 +1,80 @@ -#define IS_REM 1 -#define SIZE 4 -#define UFUNC_NAME __remlu -#define SFUNC_NAME __reml +/* Copyright (C) 2004 Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@twiddle.net> + This file is part of the GNU C Library. -#include "divrem.h" + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "div_libc.h" + +/* 32-bit signed int remainder. 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 the division for all input values except zero. + All we have to do is compute the remainder via multiply-and-subtract. */ + +#ifndef EXTEND +#define EXTEND(S,D) sextl S, D +#endif + + .text + .align 4 + .globl __reml + .type __reml, @function + .usepv __reml, no + + cfi_startproc + cfi_return_column (RA) +__reml: + lda sp, -FRAME(sp) + cfi_def_cfa_offset (FRAME) + CALL_MCOUNT + stt $f0, 0(sp) + stt $f1, 8(sp) + beq Y, DIVBYZERO + cfi_rel_offset ($f0, 0) + cfi_rel_offset ($f1, 8) + + EXTEND (X, RV) + EXTEND (Y, AT) + stq RV, 16(sp) + stq AT, 24(sp) + + ldt $f0, 16(sp) + ldt $f1, 24(sp) + cvtqt $f0, $f0 + cvtqt $f1, $f1 + + divt/c $f0, $f1, $f0 + cvttq/c $f0, $f0 + stt $f0, 16(sp) + ldq RV, 16(sp) + + ldt $f0, 0(sp) + mull RV, Y, RV + ldt $f1, 8(sp) + lda sp, FRAME(sp) + cfi_restore ($f0) + cfi_restore ($f1) + cfi_def_cfa_offset (0) + + subl X, RV, RV + ret $31, (RA), 1 + + cfi_endproc + .size __reml, .-__reml + + DO_DIVBYZERO |