diff options
Diffstat (limited to 'gcc/real.c')
| -rw-r--r-- | gcc/real.c | 60 |
1 files changed, 2 insertions, 58 deletions
@@ -30,19 +30,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA /* To enable support of XFmode extended real floating point, define LONG_DOUBLE_TYPE_SIZE 96 in the tm.h file (m68k.h or i386.h). -To support cross compilation between IEEE, VAX and IBM floating -point formats, define REAL_ARITHMETIC in the tm.h file. - -In either case the machine files (tm.h) must not contain any code +Machine files (tm.h etc) must not contain any code that tries to use host floating point arithmetic to convert REAL_VALUE_TYPEs from `double' to `float', pass them to fprintf, etc. In cross-compile situations a REAL_VALUE_TYPE may not be intelligible to the host computer's native arithmetic. -The emulator defaults to the host's floating point format so that -its decimal conversion functions can be used if desired (see -real.h). - The first part of this file interfaces gcc to a floating point arithmetic suite that was not written with gcc in mind. Avoid changing the low-level arithmetic routines unless you have suitable @@ -88,10 +81,7 @@ netlib.att.com: netlib/cephes. */ If LONG_DOUBLE_TYPE_SIZE = 64 (the default, unless tm.h defines it) then `long double' and `double' are both implemented, but they - both mean DFmode. In this case, the software floating-point - support available here is activated by writing - #define REAL_ARITHMETIC - in tm.h. + both mean DFmode. The case LONG_DOUBLE_TYPE_SIZE = 128 activates TFmode support and may deactivate XFmode since `long double' is used to refer @@ -113,10 +103,6 @@ netlib.att.com: netlib/cephes. */ /* The following converts gcc macros into the ones used by this file. */ -/* REAL_ARITHMETIC defined means that macros in real.h are - defined to call emulator functions. */ -#ifdef REAL_ARITHMETIC - #if TARGET_FLOAT_FORMAT == VAX_FLOAT_FORMAT /* PDP-11, Pro350, VAX: */ #define DEC 1 @@ -142,33 +128,6 @@ unknown arithmetic type #define REAL_WORDS_BIG_ENDIAN FLOAT_WORDS_BIG_ENDIAN -#else -/* REAL_ARITHMETIC not defined means that the *host's* data - structure will be used. It may differ by endian-ness from the - target machine's structure and will get its ends swapped - accordingly (but not here). Probably only the decimal <-> binary - functions in this file will actually be used in this case. */ - -#if HOST_FLOAT_FORMAT == VAX_FLOAT_FORMAT -#define DEC 1 -#else /* it's not VAX */ -#if HOST_FLOAT_FORMAT == IBM_FLOAT_FORMAT -/* IBM System/370 style */ -#define IBM 1 -#else /* it's also not an IBM */ -#if HOST_FLOAT_FORMAT == IEEE_FLOAT_FORMAT -#define IEEE -#else /* it's not IEEE either */ -unknown arithmetic type -#define UNK 1 -#endif /* not IEEE */ -#endif /* not IBM */ -#endif /* not VAX */ - -#define REAL_WORDS_BIG_ENDIAN HOST_FLOAT_WORDS_BIG_ENDIAN - -#endif /* REAL_ARITHMETIC not defined */ - /* Define INFINITY for support of infinity. Define NANS for support of Not-a-Number's (NaN's). */ #if !defined(DEC) && !defined(IBM) && !defined(C4X) @@ -290,7 +249,6 @@ typedef unsigned int UHItype __attribute__ ((mode (HI))); #define NE 6 #define MAXDECEXP 4932 #define MINDECEXP -4956 -#ifdef REAL_ARITHMETIC /* Emulator uses target format internally but host stores it in host endian-ness. */ @@ -324,13 +282,6 @@ do { \ } \ } while (0) -#else /* not REAL_ARITHMETIC */ - -/* emulator uses host format */ -#define GET_REAL(r,e) e53toe ((const UEMUSHORT *) (r), (e)) -#define PUT_REAL(e,r) etoe53 ((e), (UEMUSHORT *) (r)) - -#endif /* not REAL_ARITHMETIC */ #endif /* not TFmode */ #endif /* not XFmode */ @@ -1048,11 +999,6 @@ ereal_ldexp (x, n) return (r); } -/* These routines are conditionally compiled because functions - of the same names may be defined in fold-const.c. */ - -#ifdef REAL_ARITHMETIC - /* Check for infinity in a REAL_VALUE_TYPE. */ int @@ -1226,7 +1172,6 @@ exact_real_inverse (mode, r) PUT_REAL (einv, r); return 1; } -#endif /* REAL_ARITHMETIC defined */ /* Used for debugging--print the value of R in human-readable format on stderr. */ @@ -1361,7 +1306,6 @@ ereal_isneg (x) return (eisneg (ex)); } -/* End of REAL_ARITHMETIC interface */ /* Extended precision IEEE binary floating point arithmetic routines |