diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/soft-fp')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/soft-fp/sfp-machine.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/soft-fp/sfp-machine.h b/REORG.TODO/sysdeps/powerpc/soft-fp/sfp-machine.h new file mode 100644 index 0000000000..d92a90e3e2 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/soft-fp/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; |