diff options
Diffstat (limited to 'libc/dfp/sysdeps/powerpc/powerpc32/power6/fpu/fixunssdsi.S')
| -rw-r--r-- | libc/dfp/sysdeps/powerpc/powerpc32/power6/fpu/fixunssdsi.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libc/dfp/sysdeps/powerpc/powerpc32/power6/fpu/fixunssdsi.S b/libc/dfp/sysdeps/powerpc/powerpc32/power6/fpu/fixunssdsi.S new file mode 100644 index 000000000..482ff593a --- /dev/null +++ b/libc/dfp/sysdeps/powerpc/powerpc32/power6/fpu/fixunssdsi.S @@ -0,0 +1,52 @@ +/* Decimal Floating Point convert 32-bit to unsigned int. + POWER6 PowerPC32 version. + Copyright (C) 2006 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, write to the Free + Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, + MA 02110-1301 USA */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + + .machine "power6" +/* int __fixunssdsi (__decimal32 x) */ +ENTRY (__fixunssdsi) + stwu r1,-16(r1) + cfi_adjust_cfa_offset (16) + dctdp fp1,fp1 /* Convert x to __decimal64. */ + drintn. 0,fp1,fp1,1 /* Preround to toward zero. */ + dctfix fp0,fp1 /* Convert x to integer. */ + stfd fp0,8(r1) + ori r1,r1,0 /* Special group ending nop. */ + lwz r0,8(r1) + lwz r3,12(r1) +/* The return is an int, but we have long long, so we need to force overflow + if there are any significant bits in the high word or overflow (incorrect + sign) from the low word. */ + cmpwi cr0,r0,0 + cmpwi cr6,r3,0 + blt cr0,L(negative) + bne cr0,L(posoverflow) + bge cr6,L(done) +L(posoverflow): + li r3,-1 /* return max unsigned int. */ + b L(done) +L(negative): + lis r3,0 /* return 0 for negative floats. */ +L(done): + addi r1,r1,16 + blr + END (__fixunssdsi) |