Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Matthew Wilcox | 1050 | 99.81% | 1 | 50.00% |
Thomas Gleixner | 2 | 0.19% | 1 | 50.00% |
Total | 1052 | 2 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Linux/PA-RISC Project (http://www.parisc-linux.org/) * * Floating-point emulation code * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> */ /* * BEGIN_DESC * * File: * @(#) pa/spmath/fcnvfut.c $Revision: 1.1 $ * * Purpose: * Floating-point to Unsigned Fixed-point Converts with Truncation * * External Interfaces: * dbl_to_dbl_fcnvfut(srcptr,nullptr,dstptr,status) * dbl_to_sgl_fcnvfut(srcptr,nullptr,dstptr,status) * sgl_to_dbl_fcnvfut(srcptr,nullptr,dstptr,status) * sgl_to_sgl_fcnvfut(srcptr,nullptr,dstptr,status) * * Internal Interfaces: * * Theory: * <<please update with a overview of the operation of this file>> * * END_DESC */ #include "float.h" #include "sgl_float.h" #include "dbl_float.h" #include "cnv_float.h" /************************************************************************ * Floating-point to Unsigned Fixed-point Converts with Truncation * ************************************************************************/ /* * Convert single floating-point to single fixed-point format * with truncated result */ /*ARGSUSED*/ int sgl_to_sgl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr, unsigned int *dstptr, unsigned int *status) { register unsigned int src, result; register int src_exponent; src = *srcptr; src_exponent = Sgl_exponent(src) - SGL_BIAS; /* * Test for overflow */ if (src_exponent > SGL_FX_MAX_EXP + 1) { if (Sgl_isone_sign(src)) { result = 0; } else { result = 0xffffffff; } if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); *dstptr = result; return(NOEXCEPTION); } /* * Generate result */ if (src_exponent >= 0) { /* * Check sign. * If negative, trap unimplemented. */ if (Sgl_isone_sign(src)) { result = 0; if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); *dstptr = result; return(NOEXCEPTION); } Sgl_clear_signexponent_set_hidden(src); Suint_from_sgl_mantissa(src,src_exponent,result); *dstptr = result; /* check for inexact */ if (Sgl_isinexact_to_unsigned(src,src_exponent)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } else { *dstptr = 0; /* check for inexact */ if (Sgl_isnotzero_exponentmantissa(src)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } return(NOEXCEPTION); } /* * Single Floating-point to Double Unsigned Fixed */ /*ARGSUSED*/ int sgl_to_dbl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr, dbl_unsigned * dstptr, unsigned int *status) { register int src_exponent; register unsigned int src, resultp1, resultp2; src = *srcptr; src_exponent = Sgl_exponent(src) - SGL_BIAS; /* * Test for overflow */ if (src_exponent > DBL_FX_MAX_EXP + 1) { if (Sgl_isone_sign(src)) { resultp1 = resultp2 = 0; } else { resultp1 = resultp2 = 0xffffffff; } if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); Duint_copytoptr(resultp1,resultp2,dstptr); return(NOEXCEPTION); } /* * Generate result */ if (src_exponent >= 0) { /* * Check sign. * If negative, trap unimplemented. */ if (Sgl_isone_sign(src)) { resultp1 = resultp2 = 0; if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); Duint_copytoptr(resultp1,resultp2,dstptr); return(NOEXCEPTION); } Sgl_clear_signexponent_set_hidden(src); Duint_from_sgl_mantissa(src,src_exponent,resultp1,resultp2); Duint_copytoptr(resultp1,resultp2,dstptr); /* check for inexact */ if (Sgl_isinexact_to_unsigned(src,src_exponent)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } else { Duint_setzero(resultp1,resultp2); Duint_copytoptr(resultp1,resultp2,dstptr); /* check for inexact */ if (Sgl_isnotzero_exponentmantissa(src)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } return(NOEXCEPTION); } /* * Double Floating-point to Single Unsigned Fixed */ /*ARGSUSED*/ int dbl_to_sgl_fcnvfut (dbl_floating_point * srcptr, unsigned int *nullptr, unsigned int *dstptr, unsigned int *status) { register unsigned int srcp1, srcp2, result; register int src_exponent; Dbl_copyfromptr(srcptr,srcp1,srcp2); src_exponent = Dbl_exponent(srcp1) - DBL_BIAS; /* * Test for overflow */ if (src_exponent > SGL_FX_MAX_EXP + 1) { if (Dbl_isone_sign(srcp1)) { result = 0; } else { result = 0xffffffff; } if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); *dstptr = result; return(NOEXCEPTION); } /* * Generate result */ if (src_exponent >= 0) { /* * Check sign. * If negative, trap unimplemented. */ if (Dbl_isone_sign(srcp1)) { result = 0; if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); *dstptr = result; return(NOEXCEPTION); } Dbl_clear_signexponent_set_hidden(srcp1); Suint_from_dbl_mantissa(srcp1,srcp2,src_exponent,result); *dstptr = result; /* check for inexact */ if (Dbl_isinexact_to_unsigned(srcp1,srcp2,src_exponent)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } else { *dstptr = 0; /* check for inexact */ if (Dbl_isnotzero_exponentmantissa(srcp1,srcp2)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } return(NOEXCEPTION); } /* * Double Floating-point to Double Unsigned Fixed */ /*ARGSUSED*/ int dbl_to_dbl_fcnvfut (dbl_floating_point * srcptr, unsigned int *nullptr, dbl_unsigned * dstptr, unsigned int *status) { register int src_exponent; register unsigned int srcp1, srcp2, resultp1, resultp2; Dbl_copyfromptr(srcptr,srcp1,srcp2); src_exponent = Dbl_exponent(srcp1) - DBL_BIAS; /* * Test for overflow */ if (src_exponent > DBL_FX_MAX_EXP + 1) { if (Dbl_isone_sign(srcp1)) { resultp1 = resultp2 = 0; } else { resultp1 = resultp2 = 0xffffffff; } if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); Duint_copytoptr(resultp1,resultp2,dstptr); return(NOEXCEPTION); } /* * Generate result */ if (src_exponent >= 0) { /* * Check sign. * If negative, trap unimplemented. */ if (Dbl_isone_sign(srcp1)) { resultp1 = resultp2 = 0; if (Is_invalidtrap_enabled()) { return(INVALIDEXCEPTION); } Set_invalidflag(); Duint_copytoptr(resultp1,resultp2,dstptr); return(NOEXCEPTION); } Dbl_clear_signexponent_set_hidden(srcp1); Duint_from_dbl_mantissa(srcp1,srcp2,src_exponent, resultp1,resultp2); Duint_copytoptr(resultp1,resultp2,dstptr); /* check for inexact */ if (Dbl_isinexact_to_unsigned(srcp1,srcp2,src_exponent)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } else { Duint_setzero(resultp1,resultp2); Duint_copytoptr(resultp1,resultp2,dstptr); /* check for inexact */ if (Dbl_isnotzero_exponentmantissa(srcp1,srcp2)) { if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); else Set_inexactflag(); } } return(NOEXCEPTION); }
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