2004-06-30 23:43:49 +00:00
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/* float Floor function. PowerPC32 version.
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2004-12-22 20:10:10 +00:00
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Copyright (C) 2004 Free Software Foundation, Inc.
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2004-06-30 23:43:49 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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2004-12-22 20:10:10 +00:00
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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2004-06-30 23:43:49 +00:00
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#include <sysdep.h>
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2004-12-22 20:10:10 +00:00
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.section .rodata
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.align 3
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.type TWO23.0,@object
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.size TWO23.0,8
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TWO23.0:
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.long 0x41600000
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.long 0
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.section .rodata.cst8,"aM",@progbits,8
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.align 3
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2004-06-30 23:43:49 +00:00
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.LC0: /* 2**23 */
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2004-12-22 20:10:10 +00:00
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.long 0x41600000
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.long 0
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2004-06-30 23:43:49 +00:00
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.section ".text"
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ENTRY (__floorf)
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mffs fp11 /* Save current FPU rounding mode. */
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#ifdef SHARED
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mflr r11
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bl _GLOBAL_OFFSET_TABLE_@local-4
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mflr r10
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lwz r9,.LC0@got(10)
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mtlr r11
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2004-12-22 20:10:10 +00:00
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lfd fp13,0(r9)
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2004-06-30 23:43:49 +00:00
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#else
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lis r9,.LC0@ha
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lfd fp13,.LC0@l(r9)
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2004-06-30 23:43:49 +00:00
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#endif
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fabs fp0,fp1
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fsubs fp12,fp13,fp13 /* generate 0.0 */
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fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO23) */
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fcmpu cr6,fp1,fp12 /* if (x > 0.0) */
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bnllr- cr7
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mtfsfi 7,3 /* Set rounding mode toward -inf. */
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ble- cr6,.L4
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fadds fp1,fp1,fp13 /* x+= TWO23; */
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fsubs fp1,fp1,fp13 /* x-= TWO23; */
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fcmpu cr5,fp1,fp12 /* if (x > 0.0) */
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2004-06-30 23:43:49 +00:00
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mtfsf 0x01,fp11 /* restore previous rounding mode. */
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2004-12-22 20:10:10 +00:00
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bnelr+ cr5
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fmr fp1,fp12 /* x must be +0.0 for the 0.0 case. */
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2004-06-30 23:43:49 +00:00
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blr
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.L4:
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bge- cr6,.L9 /* if (x < 0.0) */
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fsubs fp1,fp1,fp13 /* x-= TWO23; */
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fadds fp1,fp1,fp13 /* x+= TWO23; */
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.L9:
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mtfsf 0x01,fp11 /* restore previous rounding mode. */
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blr
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END (__floorf)
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weak_alias (__floorf, floorf)
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