(root)/
glibc-2.38/
sysdeps/
x86/
fpu/
sfp-machine.h
       1  /* Configure soft-fp for building sqrtf128.  Based on sfp-machine.h in
       2     libgcc, with soft-float and other irrelevant parts removed.  */
       3  
       4  /* The type of the result of a floating point comparison.  This must
       5     match `__libgcc_cmp_return__' in GCC for the target.  */
       6  typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
       7  #define CMPtype __gcc_CMPtype
       8  
       9  #ifdef __x86_64__
      10  # define _FP_W_TYPE_SIZE	64
      11  # define _FP_W_TYPE		unsigned long long
      12  # define _FP_WS_TYPE		signed long long
      13  # define _FP_I_TYPE		long long
      14  
      15  typedef int TItype __attribute__ ((mode (TI)));
      16  typedef unsigned int UTItype __attribute__ ((mode (TI)));
      17  
      18  # define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype))
      19  
      20  # define _FP_MUL_MEAT_Q(R,X,Y)				\
      21    _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
      22  
      23  # define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
      24  
      25  # define _FP_NANFRAC_S		_FP_QNANBIT_S
      26  # define _FP_NANFRAC_D		_FP_QNANBIT_D
      27  # define _FP_NANFRAC_E		_FP_QNANBIT_E, 0
      28  # define _FP_NANFRAC_Q		_FP_QNANBIT_Q, 0
      29  
      30  # define FP_EX_SHIFT 7
      31  
      32  # define _FP_DECL_EX \
      33    unsigned int _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
      34  
      35  # define FP_RND_NEAREST		0
      36  # define FP_RND_ZERO		0x6000
      37  # define FP_RND_PINF		0x4000
      38  # define FP_RND_MINF		0x2000
      39  
      40  # define FP_RND_MASK		0x6000
      41  
      42  # ifdef __AVX__
      43  #  define AVX_INSN_PREFIX	"v"
      44  # else
      45  #  define AVX_INSN_PREFIX	""
      46  # endif
      47  
      48  # define FP_INIT_ROUNDMODE					\
      49    do {								\
      50      __asm__ __volatile__ (AVX_INSN_PREFIX "stmxcsr\t%0" : "=m" (_fcw)); \
      51    } while (0)
      52  #else
      53  # define _FP_W_TYPE_SIZE	32
      54  # define _FP_W_TYPE		unsigned int
      55  # define _FP_WS_TYPE		signed int
      56  # define _FP_I_TYPE		int
      57  
      58  # define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)	\
      59    __asm__ ("add{l} {%11,%3|%3,%11}\n\t"				\
      60  	   "adc{l} {%9,%2|%2,%9}\n\t"				\
      61  	   "adc{l} {%7,%1|%1,%7}\n\t"				\
      62  	   "adc{l} {%5,%0|%0,%5}"				\
      63  	   : "=r" ((USItype) (r3)),				\
      64  	     "=&r" ((USItype) (r2)),				\
      65  	     "=&r" ((USItype) (r1)),				\
      66  	     "=&r" ((USItype) (r0))				\
      67  	   : "%0" ((USItype) (x3)),				\
      68  	     "g" ((USItype) (y3)),				\
      69  	     "%1" ((USItype) (x2)),				\
      70  	     "g" ((USItype) (y2)),				\
      71  	     "%2" ((USItype) (x1)),				\
      72  	     "g" ((USItype) (y1)),				\
      73  	     "%3" ((USItype) (x0)),				\
      74  	     "g" ((USItype) (y0)))
      75  # define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)		\
      76    __asm__ ("add{l} {%8,%2|%2,%8}\n\t"				\
      77  	   "adc{l} {%6,%1|%1,%6}\n\t"				\
      78  	   "adc{l} {%4,%0|%0,%4}"				\
      79  	   : "=r" ((USItype) (r2)),				\
      80  	     "=&r" ((USItype) (r1)),				\
      81  	     "=&r" ((USItype) (r0))				\
      82  	   : "%0" ((USItype) (x2)),				\
      83  	     "g" ((USItype) (y2)),				\
      84  	     "%1" ((USItype) (x1)),				\
      85  	     "g" ((USItype) (y1)),				\
      86  	     "%2" ((USItype) (x0)),				\
      87  	     "g" ((USItype) (y0)))
      88  # define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)	\
      89    __asm__ ("sub{l} {%11,%3|%3,%11}\n\t"				\
      90  	   "sbb{l} {%9,%2|%2,%9}\n\t"				\
      91  	   "sbb{l} {%7,%1|%1,%7}\n\t"				\
      92  	   "sbb{l} {%5,%0|%0,%5}"				\
      93  	   : "=r" ((USItype) (r3)),				\
      94  	     "=&r" ((USItype) (r2)),				\
      95  	     "=&r" ((USItype) (r1)),				\
      96  	     "=&r" ((USItype) (r0))				\
      97  	   : "0" ((USItype) (x3)),				\
      98  	     "g" ((USItype) (y3)),				\
      99  	     "1" ((USItype) (x2)),				\
     100  	     "g" ((USItype) (y2)),				\
     101  	     "2" ((USItype) (x1)),				\
     102  	     "g" ((USItype) (y1)),				\
     103  	     "3" ((USItype) (x0)),				\
     104  	     "g" ((USItype) (y0)))
     105  # define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)		\
     106    __asm__ ("sub{l} {%8,%2|%2,%8}\n\t"				\
     107  	   "sbb{l} {%6,%1|%1,%6}\n\t"				\
     108  	   "sbb{l} {%4,%0|%0,%4}"				\
     109  	   : "=r" ((USItype) (r2)),				\
     110  	     "=&r" ((USItype) (r1)),				\
     111  	     "=&r" ((USItype) (r0))				\
     112  	   : "0" ((USItype) (x2)),				\
     113  	     "g" ((USItype) (y2)),				\
     114  	     "1" ((USItype) (x1)),				\
     115  	     "g" ((USItype) (y1)),				\
     116  	     "2" ((USItype) (x0)),				\
     117  	     "g" ((USItype) (y0)))
     118  # define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i)			\
     119    __asm__ ("add{l} {%4,%3|%3,%4}\n\t"				\
     120  	   "adc{l} {$0,%2|%2,0}\n\t"				\
     121  	   "adc{l} {$0,%1|%1,0}\n\t"				\
     122  	   "adc{l} {$0,%0|%0,0}"				\
     123  	   : "+r" ((USItype) (x3)),				\
     124  	     "+&r" ((USItype) (x2)),				\
     125  	     "+&r" ((USItype) (x1)),				\
     126  	     "+&r" ((USItype) (x0))				\
     127  	   : "g" ((USItype) (i)))
     128  
     129  
     130  # define _FP_MUL_MEAT_S(R,X,Y)				\
     131    _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
     132  # define _FP_MUL_MEAT_D(R,X,Y)				\
     133    _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
     134  # define _FP_MUL_MEAT_Q(R,X,Y)				\
     135    _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
     136  
     137  # define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_loop(S,R,X,Y)
     138  # define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
     139  # define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
     140  
     141  # define _FP_NANFRAC_S		_FP_QNANBIT_S
     142  # define _FP_NANFRAC_D		_FP_QNANBIT_D, 0
     143  /* Even if XFmode is 12byte,  we have to pad it to
     144     16byte since soft-fp emulation is done in 16byte.  */
     145  # define _FP_NANFRAC_E		_FP_QNANBIT_E, 0, 0, 0
     146  # define _FP_NANFRAC_Q		_FP_QNANBIT_Q, 0, 0, 0
     147  
     148  # define FP_EX_SHIFT 0
     149  
     150  # define _FP_DECL_EX \
     151    unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
     152  
     153  # define FP_RND_NEAREST		0
     154  # define FP_RND_ZERO		0xc00
     155  # define FP_RND_PINF		0x800
     156  # define FP_RND_MINF		0x400
     157  
     158  # define FP_RND_MASK		0xc00
     159  
     160  # define FP_INIT_ROUNDMODE				\
     161    do {							\
     162      __asm__ __volatile__ ("fnstcw\t%0" : "=m" (_fcw));	\
     163    } while (0)
     164  #endif
     165  
     166  #define _FP_KEEPNANFRACP	1
     167  #define _FP_QNANNEGATEDP 0
     168  
     169  #define _FP_NANSIGN_S		1
     170  #define _FP_NANSIGN_D		1
     171  #define _FP_NANSIGN_E		1
     172  #define _FP_NANSIGN_Q		1
     173  
     174  /* Here is something Intel misdesigned: the specs don't define
     175     the case where we have two NaNs with same mantissas, but
     176     different sign. Different operations pick up different NaNs.  */
     177  #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
     178    do {								\
     179      if (_FP_FRAC_GT_##wc(X, Y)					\
     180  	|| (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*')))	\
     181        {								\
     182  	R##_s = X##_s;						\
     183  	_FP_FRAC_COPY_##wc(R,X);				\
     184        }								\
     185      else							\
     186        {								\
     187  	R##_s = Y##_s;						\
     188  	_FP_FRAC_COPY_##wc(R,Y);				\
     189        }								\
     190      R##_c = FP_CLS_NAN;						\
     191    } while (0)
     192  
     193  #define FP_EX_INVALID		0x01
     194  #define FP_EX_DENORM		0x02
     195  #define FP_EX_DIVZERO		0x04
     196  #define FP_EX_OVERFLOW		0x08
     197  #define FP_EX_UNDERFLOW		0x10
     198  #define FP_EX_INEXACT		0x20
     199  #define FP_EX_ALL \
     200  	(FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
     201  	 | FP_EX_UNDERFLOW | FP_EX_INEXACT)
     202  
     203  void __sfp_handle_exceptions (int);
     204  
     205  #define FP_HANDLE_EXCEPTIONS			\
     206    do {						\
     207      if (__builtin_expect (_fex, 0))		\
     208        __sfp_handle_exceptions (_fex);		\
     209    } while (0);
     210  
     211  #define FP_TRAPPING_EXCEPTIONS ((~_fcw >> FP_EX_SHIFT) & FP_EX_ALL)
     212  
     213  #define FP_ROUNDMODE		(_fcw & FP_RND_MASK)
     214  
     215  #define _FP_TININESS_AFTER_ROUNDING 1