powerpc: move math-emu over to arch/powerpc

Towards the goal of having arch/powerpc not build anything over in arch/ppc
move math-emu over.  Also, killed some references to arch/ppc/ in the
arch/powerpc Makefile which should belong in drivers/ when the particular
sub-arch's move over to arch/powerpc.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/double.h b/arch/powerpc/math-emu/double.h
new file mode 100644
index 000000000000..ffba8b67f059
--- /dev/null
+++ b/arch/powerpc/math-emu/double.h
@@ -0,0 +1,129 @@
+/*
+ * Definitions for IEEE Double Precision
+ */
+
+#if _FP_W_TYPE_SIZE < 32
+#error "Here's a nickel kid.  Go buy yourself a real computer."
+#endif
+
+#if _FP_W_TYPE_SIZE < 64
+#define _FP_FRACTBITS_D         (2 * _FP_W_TYPE_SIZE)
+#else
+#define _FP_FRACTBITS_D         _FP_W_TYPE_SIZE
+#endif
+
+#define _FP_FRACBITS_D          53
+#define _FP_FRACXBITS_D         (_FP_FRACTBITS_D - _FP_FRACBITS_D)
+#define _FP_WFRACBITS_D         (_FP_WORKBITS + _FP_FRACBITS_D)
+#define _FP_WFRACXBITS_D        (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
+#define _FP_EXPBITS_D           11
+#define _FP_EXPBIAS_D           1023
+#define _FP_EXPMAX_D            2047
+
+#define _FP_QNANBIT_D           \
+        ((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE))
+#define _FP_IMPLBIT_D           \
+        ((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE))
+#define _FP_OVERFLOW_D          \
+        ((_FP_W_TYPE)1 << (_FP_WFRACBITS_D % _FP_W_TYPE_SIZE))
+
+#if _FP_W_TYPE_SIZE < 64
+
+union _FP_UNION_D
+{
+  double flt;
+  struct {
+#if __BYTE_ORDER == __BIG_ENDIAN
+    unsigned sign  : 1;
+    unsigned exp   : _FP_EXPBITS_D;
+    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
+    unsigned frac0 : _FP_W_TYPE_SIZE;
+#else
+    unsigned frac0 : _FP_W_TYPE_SIZE;
+    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
+    unsigned exp   : _FP_EXPBITS_D;
+    unsigned sign  : 1;
+#endif
+  } bits __attribute__((packed));
+};
+
+#define FP_DECL_D(X)            _FP_DECL(2,X)
+#define FP_UNPACK_RAW_D(X,val)  _FP_UNPACK_RAW_2(D,X,val)
+#define FP_PACK_RAW_D(val,X)    _FP_PACK_RAW_2(D,val,X)
+
+#define FP_UNPACK_D(X,val)              \
+  do {                                  \
+    _FP_UNPACK_RAW_2(D,X,val);          \
+    _FP_UNPACK_CANONICAL(D,2,X);        \
+  } while (0)
+
+#define FP_PACK_D(val,X)                \
+  do {                                  \
+    _FP_PACK_CANONICAL(D,2,X);          \
+    _FP_PACK_RAW_2(D,val,X);            \
+  } while (0)
+
+#define FP_NEG_D(R,X)           _FP_NEG(D,2,R,X)
+#define FP_ADD_D(R,X,Y)         _FP_ADD(D,2,R,X,Y)
+#define FP_SUB_D(R,X,Y)         _FP_SUB(D,2,R,X,Y)
+#define FP_MUL_D(R,X,Y)         _FP_MUL(D,2,R,X,Y)
+#define FP_DIV_D(R,X,Y)         _FP_DIV(D,2,R,X,Y)
+#define FP_SQRT_D(R,X)          _FP_SQRT(D,2,R,X)
+
+#define FP_CMP_D(r,X,Y,un)      _FP_CMP(D,2,r,X,Y,un)
+#define FP_CMP_EQ_D(r,X,Y)      _FP_CMP_EQ(D,2,r,X,Y)
+
+#define FP_TO_INT_D(r,X,rsz,rsg)  _FP_TO_INT(D,2,r,X,rsz,rsg)
+#define FP_FROM_INT_D(X,r,rs,rt)  _FP_FROM_INT(D,2,X,r,rs,rt)
+
+#else
+
+union _FP_UNION_D
+{
+  double flt;
+  struct {
+#if __BYTE_ORDER == __BIG_ENDIAN
+    unsigned sign : 1;
+    unsigned exp  : _FP_EXPBITS_D;
+    unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
+#else
+    unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
+    unsigned exp  : _FP_EXPBITS_D;
+    unsigned sign : 1;
+#endif
+  } bits __attribute__((packed));
+};
+
+#define FP_DECL_D(X)            _FP_DECL(1,X)
+#define FP_UNPACK_RAW_D(X,val)  _FP_UNPACK_RAW_1(D,X,val)
+#define FP_PACK_RAW_D(val,X)    _FP_PACK_RAW_1(D,val,X)
+
+#define FP_UNPACK_D(X,val)              \
+  do {                                  \
+    _FP_UNPACK_RAW_1(D,X,val);          \
+    _FP_UNPACK_CANONICAL(D,1,X);        \
+  } while (0)
+
+#define FP_PACK_D(val,X)                \
+  do {                                  \
+    _FP_PACK_CANONICAL(D,1,X);          \
+    _FP_PACK_RAW_1(D,val,X);            \
+  } while (0)
+
+#define FP_NEG_D(R,X)           _FP_NEG(D,1,R,X)
+#define FP_ADD_D(R,X,Y)         _FP_ADD(D,1,R,X,Y)
+#define FP_SUB_D(R,X,Y)         _FP_SUB(D,1,R,X,Y)
+#define FP_MUL_D(R,X,Y)         _FP_MUL(D,1,R,X,Y)
+#define FP_DIV_D(R,X,Y)         _FP_DIV(D,1,R,X,Y)
+#define FP_SQRT_D(R,X)          _FP_SQRT(D,1,R,X)
+
+/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
+   the target machine.  */
+
+#define FP_CMP_D(r,X,Y,un)      _FP_CMP(D,1,r,X,Y,un)
+#define FP_CMP_EQ_D(r,X,Y)      _FP_CMP_EQ(D,1,r,X,Y)
+
+#define FP_TO_INT_D(r,X,rsz,rsg)  _FP_TO_INT(D,1,r,X,rsz,rsg)
+#define FP_FROM_INT_D(X,r,rs,rt)  _FP_FROM_INT(D,1,X,r,rs,rt)
+
+#endif /* W_TYPE_SIZE < 64 */