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116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
#define _FP_W_TYPE_SIZE 32
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#define _FP_W_TYPE unsigned long
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#define _FP_WS_TYPE signed long
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#define _FP_I_TYPE long
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#define _FP_MUL_MEAT_S(R,X,Y) \
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_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_D(R,X,Y) \
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_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_Q(R,X,Y) \
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_FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
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#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_loop(S,R,X,Y)
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
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#define _FP_NANSIGN_S 0
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#define _FP_NANSIGN_D 0
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#define _FP_NANSIGN_Q 0
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#define _FP_KEEPNANFRACP 1
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#define _FP_QNANNEGATEDP 0
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/* Someone please check this. */
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do { \
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if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \
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&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \
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{ \
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R##_s = Y##_s; \
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_FP_FRAC_COPY_##wc(R,Y); \
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} \
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else \
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{ \
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R##_s = X##_s; \
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_FP_FRAC_COPY_##wc(R,X); \
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} \
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R##_c = FP_CLS_NAN; \
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} while (0)
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#if defined __NO_FPRS__ && !defined _SOFT_FLOAT
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/* Exception flags. We use the bit positions of the appropriate bits
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in the FPEFSCR. */
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# include <fenv_libc.h>
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# include <sysdep.h>
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# include <sys/prctl.h>
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int __feraiseexcept_soft (int);
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libc_hidden_proto (__feraiseexcept_soft)
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# define FP_EX_INEXACT SPEFSCR_FINXS
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# define FP_EX_INVALID SPEFSCR_FINVS
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# define FP_EX_DIVZERO SPEFSCR_FDBZS
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# define FP_EX_UNDERFLOW SPEFSCR_FUNFS
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# define FP_EX_OVERFLOW SPEFSCR_FOVFS
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# define _FP_DECL_EX \
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int _spefscr __attribute__ ((unused)), _ftrapex __attribute__ ((unused)) = 0
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# define FP_INIT_ROUNDMODE \
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do \
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{ \
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int _r; \
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INTERNAL_SYSCALL_DECL (_err); \
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\
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_spefscr = fegetenv_register (); \
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_r = INTERNAL_SYSCALL (prctl, _err, 2, PR_GET_FPEXC, &_ftrapex); \
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if (INTERNAL_SYSCALL_ERROR_P (_r, _err)) \
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_ftrapex = 0; \
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} \
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while (0)
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# define FP_INIT_EXCEPTIONS /* Empty. */
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# define FP_HANDLE_EXCEPTIONS __feraiseexcept_soft (_fex)
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# define FP_ROUNDMODE (_spefscr & 0x3)
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/* Not correct in general, but sufficient for the uses in soft-fp. */
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# define FP_TRAPPING_EXCEPTIONS (_ftrapex & PR_FP_EXC_UND \
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? FP_EX_UNDERFLOW \
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: 0)
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#else
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/* Exception flags. We use the bit positions of the appropriate bits
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in the FPSCR, which also correspond to the FE_* bits. This makes
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everything easier ;-). */
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# define FP_EX_INVALID (1 << (31 - 2))
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# define FP_EX_OVERFLOW (1 << (31 - 3))
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# define FP_EX_UNDERFLOW (1 << (31 - 4))
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# define FP_EX_DIVZERO (1 << (31 - 5))
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# define FP_EX_INEXACT (1 << (31 - 6))
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# define FP_HANDLE_EXCEPTIONS __simulate_exceptions (_fex)
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# define FP_ROUNDMODE __sim_round_mode
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# define FP_TRAPPING_EXCEPTIONS (~__sim_disabled_exceptions & 0x3e000000)
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#endif
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/* FIXME: these variables should be thread specific (see bugzilla bug
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15483) and ideally preserved across signal handlers, like hardware
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FP status words, but the latter is quite difficult to accomplish in
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userland. */
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extern int __sim_exceptions;
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libc_hidden_proto (__sim_exceptions);
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extern int __sim_disabled_exceptions;
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libc_hidden_proto (__sim_disabled_exceptions);
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extern int __sim_round_mode;
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libc_hidden_proto (__sim_round_mode);
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extern void __simulate_exceptions (int x) attribute_hidden;
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