diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_truncf.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_truncf.S | 60 |
1 files changed, 24 insertions, 36 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_truncf.S b/sysdeps/powerpc/powerpc32/fpu/s_truncf.S index 9a8dae931b..e2e3bd6740 100644 --- a/sysdeps/powerpc/powerpc32/fpu/s_truncf.S +++ b/sysdeps/powerpc/powerpc32/fpu/s_truncf.S @@ -1,5 +1,5 @@ /* truncf function. PowerPC32 version. - Copyright (C) 2004 Free Software Foundation, Inc. + Copyright (C) 2004, 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 @@ -14,32 +14,15 @@ 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. */ + Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA + 02110-1301 USA. */ #include <sysdep.h> - .section .rodata - .align 3 - .type TWO23.0,@object - .size TWO23.0,8 -TWO23.0: - .long 0x41600000 - .long 0 - .type NEGZERO.0,@object - .size NEGZERO.0,8 -NEGZERO.0: - .long 0x80000000 - .long 0 - - .section .rodata.cst8,"aM",@progbits,8 - .align 3 + .section .rodata.cst4,"aM",@progbits,4 + .align 2 .LC0: /* 2**23 */ - .long 0x41600000 - .long 0 -.LC1: /* -0.0 */ - .long 0x80000000 - .long 0 + .long 0x4b000000 /* float [fp1] truncf (float x [fp1]) IEEE 1003.1 trunc function. IEEE specifies "trunc to the integer @@ -48,18 +31,28 @@ NEGZERO.0: We set "round toward Zero" mode and trunc by adding +-2**23 then subtracting +-2**23. */ + .section ".text" ENTRY (__truncf) mffs fp11 /* Save current FPU rounding mode. */ #ifdef SHARED mflr r11 + cfi_register(lr,r11) +# ifdef HAVE_ASM_PPC_REL16 + bcl 20,31,1f +1: mflr r9 + addis r9,r9,.LC0-1b@ha + lfs fp13,.LC0-1b@l(r9) +# else bl _GLOBAL_OFFSET_TABLE_@local-4 mflr r10 lwz r9,.LC0@got(10) + lfs fp13,0(r9) +# endif mtlr r11 - lfd fp13,0(r9) + cfi_same_value (lr) #else lis r9,.LC0@ha - lfd fp13,.LC0@l(r9) + lfs fp13,.LC0@l(r9) #endif fabs fp0,fp1 fsubs fp12,fp13,fp13 /* generate 0.0 */ @@ -70,23 +63,18 @@ ENTRY (__truncf) ble- cr6,.L4 fadds fp1,fp1,fp13 /* x+= TWO23; */ fsubs fp1,fp1,fp13 /* x-= TWO23; */ -.L9: - mtfsf 0x01,fp11 /* restore previous truncing mode. */ + fabs fp1,fp1 /* if (x == 0.0) */ + /* x = 0.0; */ + mtfsf 0x01,fp11 /* restore previous rounding mode. */ blr .L4: bge- cr6,.L9 /* if (x < 0.0) */ fsubs fp1,fp1,fp13 /* x-= TWO23; */ fadds fp1,fp1,fp13 /* x+= TWO23; */ - fcmpu cr5,fp1,fp12 /* if (x > 0.0) */ + fnabs fp1,fp1 /* if (x == 0.0) */ + /* x = -0.0; */ +.L9: mtfsf 0x01,fp11 /* restore previous rounding mode. */ - bnelr+ cr5 -#ifdef SHARED - lwz r9,.LC1@got(10) - lfd fp1,0(r9) -#else - lis r9,.LC1@ha - lfd fp1,.LC1@l(r9) -#endif blr END (__truncf) |