Remove sysdeps/powerpc/soft-fp directory.

As per <https://sourceware.org/ml/libc-alpha/2014-10/msg00369.html>,
there should not be separate sysdeps/<arch>/soft-fp directories when
those are used by all configurations that use sysdeps/<arch>, and,
more generally, should not be sysdeps/foo/Implies files pointing to a
subdirectory foo/bar.

sysdeps/powerpc/soft-fp isn't quite such a case, as the Implies files
pointing to it are
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/Implies and
sysdeps/unix/sysv/linux/powerpc/powerpc32/e500/nofpu/Implies (and
indeed there is a different sfp-machine.h used for powerpc64le).
However, the same principle applies: there is no need for this
directory because sfp-machine.h, the only file in it, can most
naturally go in sysdeps/powerpc/nofpu, which is used by exactly the
same configurations (and there is a close dependence between the files
there and the sfp-machine.h implementation).  This patch eliminates
the sysdeps/powerpc/soft-fp directory accordingly.

Tested with build-many-glibcs.py that installed stripped shared
libraries for powerpc configurations are unchanged by this patch.

	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/Implies: Remove
	powerpc/soft-fp.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/e500/nofpu/Implies:
	Likewise.
	* sysdeps/powerpc/soft-fp/sfp-machine.h: Move to ....
	* sysdeps/powerpc/nofpu/sfp-machine.h: ... here.

1 files changed, 114 insertions, 0 deletions

diff --git a/sysdeps/powerpc/nofpu/sfp-machine.h b/sysdeps/powerpc/nofpu/sfp-machine.h
new file mode 100644
index 0000000000..d92a90e3e2
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/sfp-machine.h
@@ -0,0 +1,114 @@
+#define _FP_W_TYPE_SIZE		32
+#define _FP_W_TYPE		unsigned long
+#define _FP_WS_TYPE		signed long
+#define _FP_I_TYPE		long
+
+#define _FP_MUL_MEAT_S(R,X,Y)				\
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y)				\
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)				\
+  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_loop(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
+#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
+#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
+#define _FP_NANSIGN_S		0
+#define _FP_NANSIGN_D		0
+#define _FP_NANSIGN_Q		0
+
+#define _FP_KEEPNANFRACP 1
+#define _FP_QNANNEGATEDP 0
+
+/* Someone please check this.  */
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
+  do {								\
+    if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)		\
+	&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))	\
+      {								\
+	R##_s = Y##_s;						\
+	_FP_FRAC_COPY_##wc(R,Y);				\
+      }								\
+    else							\
+      {								\
+	R##_s = X##_s;						\
+	_FP_FRAC_COPY_##wc(R,X);				\
+      }								\
+    R##_c = FP_CLS_NAN;						\
+  } while (0)
+
+#define _FP_TININESS_AFTER_ROUNDING 0
+
+#if defined __NO_FPRS__ && !defined _SOFT_FLOAT
+
+/* Exception flags.  We use the bit positions of the appropriate bits
+   in the FPEFSCR.  */
+
+# include <fenv_libc.h>
+# include <sysdep.h>
+# include <sys/prctl.h>
+
+int __feraiseexcept_soft (int);
+libc_hidden_proto (__feraiseexcept_soft)
+
+# define FP_EX_INEXACT         SPEFSCR_FINXS
+# define FP_EX_INVALID         SPEFSCR_FINVS
+# define FP_EX_DIVZERO         SPEFSCR_FDBZS
+# define FP_EX_UNDERFLOW       SPEFSCR_FUNFS
+# define FP_EX_OVERFLOW        SPEFSCR_FOVFS
+
+# define _FP_DECL_EX \
+  int _spefscr __attribute__ ((unused)), _ftrapex __attribute__ ((unused)) = 0
+# define FP_INIT_ROUNDMODE						\
+  do									\
+    {									\
+      int _r;								\
+      INTERNAL_SYSCALL_DECL (_err);					\
+									\
+      _spefscr = fegetenv_register ();					\
+      _r = INTERNAL_SYSCALL (prctl, _err, 2, PR_GET_FPEXC, &_ftrapex);	\
+      if (INTERNAL_SYSCALL_ERROR_P (_r, _err))				\
+	_ftrapex = 0;							\
+    }									\
+  while (0)
+# define FP_INIT_EXCEPTIONS /* Empty.  */
+
+# define FP_HANDLE_EXCEPTIONS  __feraiseexcept_soft (_fex)
+# define FP_ROUNDMODE          (_spefscr & 0x3)
+
+/* Not correct in general, but sufficient for the uses in soft-fp.  */
+# define FP_TRAPPING_EXCEPTIONS (_ftrapex & PR_FP_EXC_UND	\
+				 ? FP_EX_UNDERFLOW		\
+				 : 0)
+
+#else
+
+/* Exception flags.  We use the bit positions of the appropriate bits
+   in the FPSCR, which also correspond to the FE_* bits.  This makes
+   everything easier ;-).  */
+# define FP_EX_INVALID         (1 << (31 - 2))
+# define FP_EX_OVERFLOW        (1 << (31 - 3))
+# define FP_EX_UNDERFLOW       (1 << (31 - 4))
+# define FP_EX_DIVZERO         (1 << (31 - 5))
+# define FP_EX_INEXACT         (1 << (31 - 6))
+
+# define FP_HANDLE_EXCEPTIONS  __simulate_exceptions (_fex)
+# define FP_ROUNDMODE          __sim_round_mode_thread
+# define FP_TRAPPING_EXCEPTIONS \
+  (~__sim_disabled_exceptions_thread & 0x3e000000)
+
+#endif
+
+extern __thread int __sim_exceptions_thread attribute_tls_model_ie;
+libc_hidden_tls_proto (__sim_exceptions_thread, tls_model ("initial-exec"));
+extern __thread int __sim_disabled_exceptions_thread attribute_tls_model_ie;
+libc_hidden_tls_proto (__sim_disabled_exceptions_thread,
+		       tls_model ("initial-exec"));
+extern __thread int __sim_round_mode_thread attribute_tls_model_ie;
+libc_hidden_tls_proto (__sim_round_mode_thread, tls_model ("initial-exec"));
+
+extern void __simulate_exceptions (int x) attribute_hidden;