diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_roundf.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_roundf.S | 69 |
1 files changed, 44 insertions, 25 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S b/sysdeps/powerpc/powerpc32/fpu/s_roundf.S index 7e99bca315..ea8aaf3add 100644 --- a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S +++ b/sysdeps/powerpc/powerpc32/fpu/s_roundf.S @@ -1,5 +1,5 @@ /* roundf function. PowerPC32 version. - Copyright (C) 2004, 2006 Free Software Foundation, Inc. + 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 @@ -14,17 +14,40 @@ 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., 1 Franklin Street, Fifth Floor, Boston MA - 02110-1301 USA. */ + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #include <sysdep.h> + .section .rodata + .align 3 + .type TWO23.0,@object + .size TWO23.0,8 +TWO23.0: + .long 0x43300000 + .long 0 + .type POINTFIVE.0,@object + .size POINTFIVE.0,8 +POINTFIVE.0: + .long 0x3fe00000 + .long 0 + .type NEGZERO.0,@object + .size NEGZERO.0,8 +NEGZERO.0: + .long 0x80000000 + .long 0 + .section .rodata.cst8,"aM",@progbits,8 - .align 2 + .align 3 .LC0: /* 2**23 */ - .long 0x4b000000 + .long 0x41600000 + .long 0 .LC1: /* 0.5 */ - .long 0x3f000000 + .long 0x3fe00000 + .long 0 +.LC2: /* -0.0 */ + .long 0x80000000 + .long 0 /* float [fp1] roundf (float x [fp1]) IEEE 1003.1 round function. IEEE specifies "round to the nearest @@ -36,28 +59,18 @@ "Round toward Zero" mode and round by adding +-0.5 before rounding to the integer value. */ - .section ".text" ENTRY (__roundf ) 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 - addi r9,r9,.LC0-1b@l -# else bl _GLOBAL_OFFSET_TABLE_@local-4 mflr r10 lwz r9,.LC0@got(10) -# endif mtlr r11 - cfi_same_value (lr) - lfs fp13,0(r9) + lfd fp13,0(r9) #else lis r9,.LC0@ha - lfs fp13,.LC0@l(r9) + lfd fp13,.LC0@l(r9) #endif fabs fp0,fp1 fsubs fp12,fp13,fp13 /* generate 0.0 */ @@ -66,17 +79,17 @@ ENTRY (__roundf ) bnllr- cr7 mtfsfi 7,1 /* Set rounding mode toward 0. */ #ifdef SHARED - lfs fp10,.LC1-.LC0(r9) + lwz r9,.LC1@got(10) + lfd fp10,0(r9) #else lis r9,.LC1@ha - lfs fp10,.LC1@l(r9) + lfd fp10,.LC1@l(r9) #endif ble- cr6,.L4 fadds fp1,fp1,fp10 /* x+= 0.5; */ fadds fp1,fp1,fp13 /* x+= TWO23; */ fsubs fp1,fp1,fp13 /* x-= TWO23; */ - fabs fp1,fp1 /* if (x == 0.0) */ - /* x = 0.0; */ +.L9: mtfsf 0x01,fp11 /* restore previous rounding mode. */ blr .L4: @@ -84,10 +97,16 @@ ENTRY (__roundf ) bge- cr6,.L9 /* if (x < 0.0) */ fsubs fp1,fp9,fp13 /* x-= TWO23; */ fadds fp1,fp1,fp13 /* x+= TWO23; */ - fnabs fp1,fp1 /* if (x == 0.0) */ - /* x = -0.0; */ -.L9: + fcmpu cr5,fp1,fp12 /* if (x > 0.0) */ mtfsf 0x01,fp11 /* restore previous rounding mode. */ + bnelr+ cr5 +#ifdef SHARED + lwz r9,.LC2@got(10) + lfd fp1,0(r9) +#else + lis r9,.LC2@ha + lfd fp1,.LC2@l(r9) +#endif blr END (__roundf) |