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Diffstat (limited to 'libgcc/config/rs6000/sfp-machine.h')
| -rw-r--r-- | libgcc/config/rs6000/sfp-machine.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/libgcc/config/rs6000/sfp-machine.h b/libgcc/config/rs6000/sfp-machine.h new file mode 100644 index 0000000000..ab028fe421 --- /dev/null +++ b/libgcc/config/rs6000/sfp-machine.h @@ -0,0 +1,163 @@ +/* Decide whether to use 64 or 32-bit types to do the emulation. If we are + doing IEEE-128 with VSX, use 64-bit emulation even if we are compiling for a + 32-bit target. */ + +#if defined(_ARCH_PPC64) || defined(__VSX__) || defined(__FLOAT128__) +#define _FP_W_TYPE_SIZE 64 +#define _FP_W_TYPE unsigned long long +#define _FP_WS_TYPE signed long long +#define _FP_I_TYPE long long + +#ifdef _ARCH_PPC64 +typedef int TItype __attribute__ ((mode (TI))); +typedef unsigned int UTItype __attribute__ ((mode (TI))); + +#define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype)) +#endif + +#else /* 32-bits */ +#define _FP_W_TYPE_SIZE 32 +#define _FP_W_TYPE unsigned int +#define _FP_WS_TYPE signed int +#define _FP_I_TYPE int +#endif /* 32-bits */ + +/* The type of the result of a floating point comparison. This must + match `__libgcc_cmp_return__' in GCC for the target. */ +typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__))); +#define CMPtype __gcc_CMPtype + +#define _FP_MUL_MEAT_S(R,X,Y) \ + _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm) + +#if (_FP_W_TYPE_SIZE==64) +#define _FP_MUL_MEAT_D(R,X,Y) \ + _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) +#define _FP_MUL_MEAT_Q(R,X,Y) \ + _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) +#else +#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) +#endif + +#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_loop(S,R,X,Y) + +#if (_FP_W_TYPE_SIZE==64) +#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv(D,R,X,Y) +#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) +#else +#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) +#endif + +#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) + +#if (_FP_W_TYPE_SIZE==64) +#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) +#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 +#else +#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 +#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 +#endif + +#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 + +#define __LITTLE_ENDIAN 1234 +#define __BIG_ENDIAN 4321 + +#if defined __BIG_ENDIAN__ || defined _BIG_ENDIAN +# if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN +# error "Both BIG_ENDIAN and LITTLE_ENDIAN defined!" +# endif +# define __BYTE_ORDER __BIG_ENDIAN +#else +# if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN +# define __BYTE_ORDER __LITTLE_ENDIAN +# else +# error "Cannot determine current byte order" +# endif +#endif + +/* Only provide exception support if we have hardware floating point using + floating point registers and we can execute the mtfsf instruction. This + would only be true if we are using the emulation routines for IEEE 128-bit + floating point on pre-ISA 3.0 machines without the IEEE 128-bit floating + point support. */ + +#ifdef __FLOAT128__ +#define ISA_BIT(x) (1LL << (63 - x)) + +/* Use the same bits of the FPSCR. */ +# define FP_EX_INVALID ISA_BIT(34) +# define FP_EX_OVERFLOW ISA_BIT(35) +# define FP_EX_UNDERFLOW ISA_BIT(36) +# define FP_EX_DIVZERO ISA_BIT(37) +# define FP_EX_INEXACT ISA_BIT(38) +# define FP_EX_ALL (FP_EX_INVALID | FP_EX_OVERFLOW \ + | FP_EX_UNDERFLOW | FP_EX_DIVZERO \ + | FP_EX_INEXACT) + +void __sfp_handle_exceptions (int); + +# define FP_HANDLE_EXCEPTIONS \ + do { \ + if (__builtin_expect (_fex, 0)) \ + __sfp_handle_exceptions (_fex); \ + } while (0); + +/* The FP_EX_* bits track whether the exception has occurred. This macro + must set the FP_EX_* bits of those exceptions which are configured to + trap. The FPSCR bit which indicates this is 22 ISA bits above the + respective FP_EX_* bit. Note, the ISA labels bits from msb to lsb, + so 22 ISA bits above is 22 bits below when counted from the lsb. */ +# define FP_TRAPPING_EXCEPTIONS ((_fpscr.i << 22) & FP_EX_ALL) + +# define FP_RND_NEAREST 0x0 +# define FP_RND_ZERO 0x1 +# define FP_RND_PINF 0x2 +# define FP_RND_MINF 0x3 +# define FP_RND_MASK 0x3 + +# define _FP_DECL_EX \ + union { unsigned long long i; double d; } _fpscr __attribute__ ((unused)) = \ + { .i = FP_RND_NEAREST } + +#define FP_INIT_ROUNDMODE \ + do { \ + __asm__ __volatile__ ("mffs %0" \ + : "=f" (_fpscr.d)); \ + } while (0) + +# define FP_ROUNDMODE (_fpscr.i & FP_RND_MASK) +#endif /* !__FLOAT128__ */ + +/* Define ALIASNAME as a strong alias for NAME. */ +# define strong_alias(name, aliasname) _strong_alias(name, aliasname) +# define _strong_alias(name, aliasname) \ + extern __typeof (name) aliasname __attribute__ ((alias (#name))); |