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-rw-r--r--sysdeps/powerpc/powerpc32/fpu/s_trunc.S98
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diff --git a/sysdeps/powerpc/powerpc32/fpu/s_trunc.S b/sysdeps/powerpc/powerpc32/fpu/s_trunc.S
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+/* trunc function. PowerPC32 version.
+ 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
+ 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 <sysdep.h>
+
+ .section .rodata
+ .align 3
+ .type TWO52.0,@object
+ .size TWO52.0,8
+TWO52.0:
+ .long 0x43300000
+ .long 0
+ .type NEGZERO.0,@object
+ .size NEGZERO.0,8
+NEGZERO.0:
+ .long 0x80000000
+ .long 0
+
+ .section .rodata.cst8,"aM",@progbits,8
+ .align 3
+.LC0: /* 2**52 */
+ .long 0x43300000
+ .long 0
+.LC1: /* -0.0 */
+ .long 0x80000000
+ .long 0
+
+/* double [fp1] trunc (double x [fp1])
+ IEEE 1003.1 trunc function. IEEE specifies "trunc to the integer
+ value, in floating format, nearest to but no larger in magnitude
+ then the argument."
+ We set "round toward Zero" mode and trunc by adding +-2**52 then
+ subtracting +-2**52. */
+
+ENTRY (__trunc)
+ mffs fp11 /* Save current FPU rounding mode. */
+#ifdef SHARED
+ mflr r11
+ bl _GLOBAL_OFFSET_TABLE_@local-4
+ mflr r10
+ lwz r9,.LC0@got(10)
+ mtlr r11
+ lfd fp13,0(r9)
+#else
+ lis r9,.LC0@ha
+ lfd fp13,.LC0@l(r9)
+#endif
+ fabs fp0,fp1
+ fsub fp12,fp13,fp13 /* generate 0.0 */
+ fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
+ fcmpu cr6,fp1,fp12 /* if (x > 0.0) */
+ bnllr- cr7
+ mtfsfi 7,1 /* Set rounding toward 0 mode. */
+ ble- cr6,.L4
+ fadd fp1,fp1,fp13 /* x+= TWO52; */
+ fsub fp1,fp1,fp13 /* x-= TWO52; */
+.L9:
+ mtfsf 0x01,fp11 /* restore previous truncing mode. */
+ blr
+.L4:
+ bge- cr6,.L9 /* if (x < 0.0) */
+ fsub fp1,fp1,fp13 /* x-= TWO52; */
+ fadd fp1,fp1,fp13 /* x+= TWO52; */
+ fcmpu cr5,fp1,fp12 /* if (x > 0.0) */
+ 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 (__trunc)
+
+weak_alias (__trunc, trunc)
+
+#ifdef NO_LONG_DOUBLE
+weak_alias (__trunc, truncl)
+strong_alias (__trunc, __truncl)
+#endif