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authorAndreas Jaeger <aj@suse.de>2001-09-19 10:37:31 +0000
committerAndreas Jaeger <aj@suse.de>2001-09-19 10:37:31 +0000
commitc9cf6ddeebb7bb859a4c3a0af48f117d8193b578 (patch)
tree8e68d2b39d3fb0f02ba1326000af4af2a374e317 /sysdeps/x86_64/fpu/e_powl.S
parent71ad6ad2b57396efe8a3b9036b6646ed81216413 (diff)
Update.
* sysdeps/unix/sysv/linux/x86_64/Makefile: New file. * sysdeps/unix/sysv/linux/x86_64/Versions: New file. * sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h: New file. * sysdeps/unix/sysv/linux/x86_64/bits/mman.h: New file. * sysdeps/unix/sysv/linux/x86_64/bits/stat.h: New file. * sysdeps/unix/sysv/linux/x86_64/bits/statfs.h: New file. * sysdeps/unix/sysv/linux/x86_64/bits/time.h: New file. * sysdeps/unix/sysv/linux/x86_64/bits/types.h: New file. * sysdeps/unix/sysv/linux/x86_64/brk.c: New file. * sysdeps/unix/sysv/linux/x86_64/clone.S: New file. * sysdeps/unix/sysv/linux/x86_64/fstatfs64.c: New file. * sysdeps/unix/sysv/linux/x86_64/ftruncate64.c: New file. * sysdeps/unix/sysv/linux/x86_64/fxstat.c: New file. * sysdeps/unix/sysv/linux/x86_64/fxstat64.c: New file. * sysdeps/unix/sysv/linux/x86_64/getdents.c: New file. * sysdeps/unix/sysv/linux/x86_64/getdents64.c: New file. * sysdeps/unix/sysv/linux/x86_64/getrlimit64.c: New file. * sysdeps/unix/sysv/linux/x86_64/gettimeofday.c: New file. * sysdeps/unix/sysv/linux/x86_64/glob64.c: New file. * sysdeps/unix/sysv/linux/x86_64/lxstat.c: New file. * sysdeps/unix/sysv/linux/x86_64/lxstat64.c: New file. * sysdeps/unix/sysv/linux/x86_64/mmap64.c: New file. * sysdeps/unix/sysv/linux/x86_64/pread64.c: New file. * sysdeps/unix/sysv/linux/x86_64/profil-counter.h: New file. * sysdeps/unix/sysv/linux/x86_64/pwrite64.c: New file. * sysdeps/unix/sysv/linux/x86_64/readdir.c: New file. * sysdeps/unix/sysv/linux/x86_64/readdir64.c: New file. * sysdeps/unix/sysv/linux/x86_64/readdir64_r.c: New file. * sysdeps/unix/sysv/linux/x86_64/readdir_r.c: New file. * sysdeps/unix/sysv/linux/x86_64/recv.c: New file. * sysdeps/unix/sysv/linux/x86_64/register-dump.h: New file. * sysdeps/unix/sysv/linux/x86_64/send.c: New file. * sysdeps/unix/sysv/linux/x86_64/setrlimit64.c: New file. * sysdeps/unix/sysv/linux/x86_64/sigaction.c: New file. * sysdeps/unix/sysv/linux/x86_64/sigcontextinfo.h: New file. * sysdeps/unix/sysv/linux/x86_64/sigpending.c: New file. * sysdeps/unix/sysv/linux/x86_64/sigprocmask.c: New file. * sysdeps/unix/sysv/linux/x86_64/sigsuspend.c: New file. * sysdeps/unix/sysv/linux/x86_64/statfs64.c: New file. * sysdeps/unix/sysv/linux/x86_64/sys/perm.h: New file. * sysdeps/unix/sysv/linux/x86_64/sys/procfs.h: New file. * sysdeps/unix/sysv/linux/x86_64/sys/reg.h: New file. * sysdeps/unix/sysv/linux/x86_64/sys/ucontext.h: New file. * sysdeps/unix/sysv/linux/x86_64/sys/user.h: New file. * sysdeps/unix/sysv/linux/x86_64/syscall.S: New file. * sysdeps/unix/sysv/linux/x86_64/syscalls.list: New file. * sysdeps/unix/sysv/linux/x86_64/sysdep.S: New file. * sysdeps/unix/sysv/linux/x86_64/sysdep.h: New file. * sysdeps/unix/sysv/linux/x86_64/time.c: New file. * sysdeps/unix/sysv/linux/x86_64/truncate64.c: New file. * sysdeps/unix/sysv/linux/x86_64/umount.c: New file. * sysdeps/unix/sysv/linux/x86_64/vfork.S: New file. * sysdeps/unix/sysv/linux/x86_64/xstat.c: New file. * sysdeps/unix/sysv/linux/x86_64/xstat64.c: New file. * sysdeps/unix/x86_64/sysdep.S: New file. * sysdeps/unix/x86_64/sysdep.h: New file. * sysdeps/x86_64/Implies: New file. * sysdeps/x86_64/Makefile: New file. * sysdeps/x86_64/Versions: New file. * sysdeps/x86_64/__longjmp.S: New file. * sysdeps/x86_64/abort-instr.h: New file. * sysdeps/x86_64/atomicity.h: New file. * sysdeps/x86_64/bits/endian.h: New file. * sysdeps/x86_64/bits/setjmp.h: New file. * sysdeps/x86_64/bits/string.h: New file. * sysdeps/x86_64/bp-asm.h: New file. * sysdeps/x86_64/bsd-_setjmp.S: New file. * sysdeps/x86_64/bsd-setjmp.S: New file. * sysdeps/x86_64/dl-machine.h: New file. * sysdeps/x86_64/elf/initfini.c: New file. * sysdeps/x86_64/elf/start.S: New file. * sysdeps/x86_64/ffs.c: New file. * sysdeps/x86_64/ffsll.c: New file. * sysdeps/x86_64/fpu/bits/fenv.h: New file. * sysdeps/x86_64/fpu/bits/mathdef.h: New file. * sysdeps/x86_64/fpu/e_acosl.c: New file. * sysdeps/x86_64/fpu/e_atan2l.c: New file. * sysdeps/x86_64/fpu/e_exp2l.S: New file. * sysdeps/x86_64/fpu/e_expl.c: New file. * sysdeps/x86_64/fpu/e_fmodl.S: New file. * sysdeps/x86_64/fpu/e_log10l.S: New file. * sysdeps/x86_64/fpu/e_log2l.S: New file. * sysdeps/x86_64/fpu/e_logl.S: New file. * sysdeps/x86_64/fpu/e_powl.S: New file. * sysdeps/x86_64/fpu/e_rem_pio2l.c: New file. * sysdeps/x86_64/fpu/e_scalbl.S: New file. * sysdeps/x86_64/fpu/e_sqrtl.c: New file. * sysdeps/x86_64/fpu/fclrexcpt.c: New file. * sysdeps/x86_64/fpu/fedisblxcpt.c: New file. * sysdeps/x86_64/fpu/feenablxcpt.c: New file. * sysdeps/x86_64/fpu/fegetenv.c: New file. * sysdeps/x86_64/fpu/fegetexcept.c: New file. * sysdeps/x86_64/fpu/fegetround.c: New file. * sysdeps/x86_64/fpu/feholdexcpt.c: New file. * sysdeps/x86_64/fpu/fesetenv.c: New file. * sysdeps/x86_64/fpu/fesetround.c: New file. * sysdeps/x86_64/fpu/fgetexcptflg.c: New file. * sysdeps/x86_64/fpu/fraiseexcpt.c: New file. * sysdeps/x86_64/fpu/fsetexcptflg.c: New file. * sysdeps/x86_64/fpu/ftestexcept.c: New file. * sysdeps/x86_64/fpu/libm-test-ulps: New file. * sysdeps/x86_64/fpu/math_ldbl.h: New file. * sysdeps/x86_64/fpu/printf_fphex.c: New file. * sysdeps/x86_64/fpu/s_atanl.c: New file. * sysdeps/x86_64/fpu/s_cosl.S: New file. * sysdeps/x86_64/fpu/s_expm1l.S: New file. * sysdeps/x86_64/fpu/s_fpclassifyl.c: New file. * sysdeps/x86_64/fpu/s_isinfl.c: New file. * sysdeps/x86_64/fpu/s_isnanl.c: New file. * sysdeps/x86_64/fpu/s_log1pl.S: New file. * sysdeps/x86_64/fpu/s_logbl.c: New file. * sysdeps/x86_64/fpu/s_nextafterl.c: New file. * sysdeps/x86_64/fpu/s_nexttoward.c: New file. * sysdeps/x86_64/fpu/s_nexttowardf.c: New file. * sysdeps/x86_64/fpu/s_rintl.c: New file. * sysdeps/x86_64/fpu/s_significandl.c: New file. * sysdeps/x86_64/fpu/s_sincosl.S: New file. * sysdeps/x86_64/fpu/s_sinl.S: New file. * sysdeps/x86_64/fpu/s_tanl.S: New file. * sysdeps/x86_64/gmp-mparam.h: New file. * sysdeps/x86_64/hp-timing.c: New file. * sysdeps/x86_64/hp-timing.h: New file. * sysdeps/x86_64/htonl.S: New file. * sysdeps/x86_64/memusage.h: New file. * sysdeps/x86_64/setjmp.S: New file. * sysdeps/x86_64/soft-fp/sfp-machine.h: New file. * sysdeps/x86_64/stackinfo.h: New file. * sysdeps/x86_64/sysdep.h: New file. * sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed: New file.
Diffstat (limited to 'sysdeps/x86_64/fpu/e_powl.S')
-rw-r--r--sysdeps/x86_64/fpu/e_powl.S316
1 files changed, 316 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/e_powl.S b/sysdeps/x86_64/fpu/e_powl.S
new file mode 100644
index 0000000000..8c690e16cc
--- /dev/null
+++ b/sysdeps/x86_64/fpu/e_powl.S
@@ -0,0 +1,316 @@
+/* ix87 specific implementation of pow function.
+ Copyright (C) 1996, 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+ 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 <machine/asm.h>
+
+#ifdef __ELF__
+ .section .rodata
+#else
+ .text
+#endif
+
+ .align ALIGNARG(4)
+ ASM_TYPE_DIRECTIVE(infinity,@object)
+inf_zero:
+infinity:
+ .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f
+ ASM_SIZE_DIRECTIVE(infinity)
+ ASM_TYPE_DIRECTIVE(zero,@object)
+zero: .double 0.0
+ ASM_SIZE_DIRECTIVE(zero)
+ ASM_TYPE_DIRECTIVE(minf_mzero,@object)
+minf_mzero:
+minfinity:
+ .byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff
+mzero:
+ .byte 0, 0, 0, 0, 0, 0, 0, 0x80
+ ASM_SIZE_DIRECTIVE(minf_mzero)
+ ASM_TYPE_DIRECTIVE(one,@object)
+one: .double 1.0
+ ASM_SIZE_DIRECTIVE(one)
+ ASM_TYPE_DIRECTIVE(limit,@object)
+limit: .double 0.29
+ ASM_SIZE_DIRECTIVE(limit)
+
+#ifdef PIC
+#define MO(op) op##(%rip)
+#else
+#define MO(op) op
+#endif
+
+ .text
+ENTRY(__ieee754_powl)
+ fldt 24(%rsp) // y
+ fxam
+
+
+ fnstsw
+ movb %ah, %dl
+ andb $0x45, %ah
+ cmpb $0x40, %ah // is y == 0 ?
+ je 11f
+
+ cmpb $0x05, %ah // is y == ±inf ?
+ je 12f
+
+ cmpb $0x01, %ah // is y == NaN ?
+ je 30f
+
+ fldt 8(%rsp) // x : y
+
+ fxam
+ fnstsw
+ movb %ah, %dh
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ je 20f // x is ±0
+
+ cmpb $0x05, %ah
+ je 15f // x is ±inf
+
+ fxch // y : x
+
+ /* First see whether `y' is a natural number. In this case we
+ can use a more precise algorithm. */
+ fld %st // y : y : x
+ fistpll -8(%rsp) // y : x
+ fildll -8(%rsp) // int(y) : y : x
+ fucomip %st(1),%st // y : x
+ jne 2f
+
+ /* OK, we have an integer value for y. */
+ mov -8(%rsp),%eax
+ mov -4(%rsp),%edx
+ orl $0, %edx
+ fstp %st(0) // x
+ jns 4f // y >= 0, jump
+ fdivrl MO(one) // 1/x (now referred to as x)
+ negl %eax
+ adcl $0, %edx
+ negl %edx
+4: fldl MO(one) // 1 : x
+ fxch
+
+6: shrdl $1, %edx, %eax
+ jnc 5f
+ fxch
+ fmul %st(1) // x : ST*x
+ fxch
+5: fmul %st(0), %st // x*x : ST*x
+ shrl $1, %edx
+ movl %eax, %ecx
+ orl %edx, %ecx
+ jnz 6b
+ fstp %st(0) // ST*x
+ ret
+
+ /* y is ±NAN */
+30: fldt 8(%rsp) // x : y
+ fldl MO(one) // 1.0 : x : y
+ fucomip %st(1),%st // x : y
+ je 31f
+ fxch // y : x
+31: fstp %st(1)
+ ret
+
+ .align ALIGNARG(4)
+2: /* y is a real number. */
+ fxch // x : y
+ fldl MO(one) // 1.0 : x : y
+ fld %st(1) // x : 1.0 : x : y
+ fsub %st(1) // x-1 : 1.0 : x : y
+ fabs // |x-1| : 1.0 : x : y
+ fcompl MO(limit) // 1.0 : x : y
+ fnstsw
+ fxch // x : 1.0 : y
+ test $4500,%eax
+ jz 7f
+ fsub %st(1) // x-1 : 1.0 : y
+ fyl2xp1 // log2(x) : y
+ jmp 8f
+
+7: fyl2x // log2(x) : y
+8: fmul %st(1) // y*log2(x) : y
+ fst %st(1) // y*log2(x) : y*log2(x)
+ frndint // int(y*log2(x)) : y*log2(x)
+ fsubr %st, %st(1) // int(y*log2(x)) : fract(y*log2(x))
+ fxch // fract(y*log2(x)) : int(y*log2(x))
+ f2xm1 // 2^fract(y*log2(x))-1 : int(y*log2(x))
+ faddl MO(one) // 2^fract(y*log2(x)) : int(y*log2(x))
+ fscale // 2^fract(y*log2(x))*2^int(y*log2(x)) : int(y*log2(x))
+ fstp %st(1) // 2^fract(y*log2(x))*2^int(y*log2(x))
+ ret
+
+
+ // pow(x,±0) = 1
+ .align ALIGNARG(4)
+11: fstp %st(0) // pop y
+ fldl MO(one)
+ ret
+
+ // y == ±inf
+ .align ALIGNARG(4)
+12: fstp %st(0) // pop y
+ fldt 8(%rsp) // x
+ fabs
+ fcompl MO(one) // < 1, == 1, or > 1
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x45, %ah
+ je 13f // jump if x is NaN
+
+ cmpb $0x40, %ah
+ je 14f // jump if |x| == 1
+
+ shlb $1, %ah
+ xorb %ah, %dl
+ andl $2, %edx
+#ifdef PIC
+ lea inf_zero(%rip),%rcx
+ fldl (%rcx, %rdx, 4)
+#else
+ fldl inf_zero(,%rdx, 4)
+#endif
+ ret
+
+ .align ALIGNARG(4)
+14: fldl MO(one)
+ ret
+
+ .align ALIGNARG(4)
+13: fldt 8(%rsp) // load x == NaN
+ ret
+
+ .align ALIGNARG(4)
+ // x is ±inf
+15: fstp %st(0) // y
+ testb $2, %dh
+ jz 16f // jump if x == +inf
+
+ // We must find out whether y is an odd integer.
+ fld %st // y : y
+ fistpll -8(%rsp) // y
+ fildll -8(%rsp) // int(y) : y
+ fucomip %st(1),%st
+ ffreep %st // <empty>
+ jne 17f
+
+ // OK, the value is an integer, but is it odd?
+ mov -8(%rsp), %eax
+ mov -4(%rsp), %edx
+ andb $1, %al
+ jz 18f // jump if not odd
+ // It's an odd integer.
+ shrl $31, %edx
+#ifdef PIC
+ lea minf_mzero(%rip),%rcx
+ fldl (%rcx, %rdx, 8)
+#else
+ fldl minf_mzero(,%rdx, 8)
+#endif
+ ret
+
+ .align ALIGNARG(4)
+16: fcompl MO(zero)
+ fnstsw
+ shrl $5, %eax
+ andl $8, %eax
+#ifdef PIC
+ lea inf_zero(%rip),%rcx
+ fldl (%rcx, %rax, 1)
+#else
+ fldl inf_zero(,%rax, 1)
+#endif
+ ret
+
+ .align ALIGNARG(4)
+17: shll $30, %edx // sign bit for y in right position
+18: shrl $31, %edx
+#ifdef PIC
+ lea inf_zero(%rip),%rcx
+ fldl (%rcx, %rdx, 8)
+#else
+ fldl inf_zero(,%rdx, 8)
+#endif
+ ret
+
+ .align ALIGNARG(4)
+ // x is ±0
+20: fstp %st(0) // y
+ testb $2, %dl
+ jz 21f // y > 0
+
+ // x is ±0 and y is < 0. We must find out whether y is an odd integer.
+ testb $2, %dh
+ jz 25f
+
+ fld %st // y : y
+ fistpll -8(%rsp) // y
+ fildll -8(%rsp) // int(y) : y
+ fucomip %st(1),%st
+ ffreep %st // <empty>
+ jne 26f
+
+ // OK, the value is an integer, but is it odd?
+ mov -8(%rsp),%eax
+ mov -4(%rsp),%edx
+ andb $1, %al
+ jz 27f // jump if not odd
+ // It's an odd integer.
+ // Raise divide-by-zero exception and get minus infinity value.
+ fldl MO(one)
+ fdivl MO(zero)
+ fchs
+ ret
+
+25: fstp %st(0)
+26:
+27: // Raise divide-by-zero exception and get infinity value.
+ fldl MO(one)
+ fdivl MO(zero)
+ ret
+
+ .align ALIGNARG(4)
+ // x is ±0 and y is > 0. We must find out whether y is an odd integer.
+21: testb $2, %dh
+ jz 22f
+
+ fld %st // y : y
+ fistpll -8(%rsp) // y
+ fildll -8(%rsp) // int(y) : y
+ fucomip %st(1),%st
+ ffreep %st // <empty>
+ jne 23f
+
+ // OK, the value is an integer, but is it odd?
+ mov -8(%rsp),%eax
+ mov -4(%rsp),%edx
+ andb $1, %al
+ jz 24f // jump if not odd
+ // It's an odd integer.
+ fldl MO(mzero)
+ ret
+
+22: fstp %st(0)
+23:
+24: fldl MO(zero)
+ ret
+
+END(__ieee754_powl)