mirror of
https://github.com/izzy2lost/xemu.git
synced 2026-07-06 00:20:22 -07:00
use the generic soft float code
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1333 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
@@ -1,120 +0,0 @@
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/*
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-------------------------------------------------------------------------------
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The macro `BITS64' can be defined to indicate that 64-bit integer types are
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supported by the compiler.
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-------------------------------------------------------------------------------
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*/
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#define BITS64
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/*
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-------------------------------------------------------------------------------
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Each of the following `typedef's defines the most convenient type that holds
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integers of at least as many bits as specified. For example, `uint8' should
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be the most convenient type that can hold unsigned integers of as many as
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8 bits. The `flag' type must be able to hold either a 0 or 1. For most
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implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
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to the same as `int'.
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-------------------------------------------------------------------------------
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*/
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typedef char flag;
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typedef unsigned char uint8;
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typedef signed char int8;
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typedef int uint16;
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typedef int int16;
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typedef unsigned int uint32;
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typedef signed int int32;
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#ifdef BITS64
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typedef unsigned long long int bits64;
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typedef signed long long int sbits64;
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#endif
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/*
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-------------------------------------------------------------------------------
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Each of the following `typedef's defines a type that holds integers
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of _exactly_ the number of bits specified. For instance, for most
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implementation of C, `bits16' and `sbits16' should be `typedef'ed to
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`unsigned short int' and `signed short int' (or `short int'), respectively.
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-------------------------------------------------------------------------------
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*/
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typedef unsigned char bits8;
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typedef signed char sbits8;
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typedef unsigned short int bits16;
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typedef signed short int sbits16;
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typedef unsigned int bits32;
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typedef signed int sbits32;
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#ifdef BITS64
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typedef unsigned long long int uint64;
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typedef signed long long int int64;
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#endif
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#ifdef BITS64
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/*
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-------------------------------------------------------------------------------
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The `LIT64' macro takes as its argument a textual integer literal and if
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necessary ``marks'' the literal as having a 64-bit integer type. For
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example, the Gnu C Compiler (`gcc') requires that 64-bit literals be
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appended with the letters `LL' standing for `long long', which is `gcc's
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name for the 64-bit integer type. Some compilers may allow `LIT64' to be
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defined as the identity macro: `#define LIT64( a ) a'.
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-------------------------------------------------------------------------------
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*/
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#define LIT64( a ) a##LL
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#endif
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/*
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-------------------------------------------------------------------------------
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The macro `INLINE' can be used before functions that should be inlined. If
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a compiler does not support explicit inlining, this macro should be defined
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to be `static'.
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-------------------------------------------------------------------------------
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*/
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#define INLINE extern __inline__
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/* For use as a GCC soft-float library we need some special function names. */
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#ifdef __LIBFLOAT__
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/* Some 32-bit ops can be mapped straight across by just changing the name. */
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#define float32_add __addsf3
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#define float32_sub __subsf3
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#define float32_mul __mulsf3
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#define float32_div __divsf3
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#define int32_to_float32 __floatsisf
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#define float32_to_int32_round_to_zero __fixsfsi
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#define float32_to_uint32_round_to_zero __fixunssfsi
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/* These ones go through the glue code. To avoid namespace pollution
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we rename the internal functions too. */
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#define float32_eq ___float32_eq
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#define float32_le ___float32_le
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#define float32_lt ___float32_lt
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/* All the 64-bit ops have to go through the glue, so we pull the same
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trick. */
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#define float64_add ___float64_add
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#define float64_sub ___float64_sub
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#define float64_mul ___float64_mul
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#define float64_div ___float64_div
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#define int32_to_float64 ___int32_to_float64
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#define float64_to_int32_round_to_zero ___float64_to_int32_round_to_zero
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#define float64_to_uint32_round_to_zero ___float64_to_uint32_round_to_zero
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#define float64_to_float32 ___float64_to_float32
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#define float32_to_float64 ___float32_to_float64
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#define float64_eq ___float64_eq
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#define float64_le ___float64_le
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#define float64_lt ___float64_lt
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#if 0
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#define float64_add __adddf3
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#define float64_sub __subdf3
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#define float64_mul __muldf3
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#define float64_div __divdf3
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#define int32_to_float64 __floatsidf
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#define float64_to_int32_round_to_zero __fixdfsi
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#define float64_to_uint32_round_to_zero __fixunsdfsi
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#define float64_to_float32 __truncdfsf2
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#define float32_to_float64 __extendsfdf2
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#endif
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#endif
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@@ -53,7 +53,7 @@ unsigned int DoubleCPDO(const unsigned int opcode)
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switch (fpa11->fType[Fm])
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{
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case typeSingle:
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rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle);
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rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);
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break;
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case typeDouble:
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@@ -79,7 +79,7 @@ unsigned int DoubleCPDO(const unsigned int opcode)
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switch (fpa11->fType[Fn])
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{
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case typeSingle:
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rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle);
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rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
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break;
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case typeDouble:
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@@ -96,30 +96,30 @@ unsigned int DoubleCPDO(const unsigned int opcode)
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{
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/* dyadic opcodes */
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case ADF_CODE:
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fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm);
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fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm, &fpa11->fp_status);
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break;
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case MUF_CODE:
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case FML_CODE:
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fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm);
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fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm, &fpa11->fp_status);
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break;
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case SUF_CODE:
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fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm);
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fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm, &fpa11->fp_status);
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break;
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case RSF_CODE:
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fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn);
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fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn, &fpa11->fp_status);
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break;
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case DVF_CODE:
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case FDV_CODE:
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fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm);
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fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm, &fpa11->fp_status);
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break;
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case RDF_CODE:
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case FRD_CODE:
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fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn);
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fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn, &fpa11->fp_status);
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break;
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#if 0
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@@ -133,7 +133,7 @@ unsigned int DoubleCPDO(const unsigned int opcode)
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#endif
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case RMF_CODE:
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fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm);
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fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm, &fpa11->fp_status);
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break;
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#if 0
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@@ -173,11 +173,11 @@ unsigned int DoubleCPDO(const unsigned int opcode)
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case RND_CODE:
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case URD_CODE:
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fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm);
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fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm, &fpa11->fp_status);
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break;
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case SQT_CODE:
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fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm);
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fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm, &fpa11->fp_status);
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break;
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#if 0
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@@ -53,11 +53,11 @@ unsigned int ExtendedCPDO(const unsigned int opcode)
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switch (fpa11->fType[Fm])
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{
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case typeSingle:
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rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
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rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);
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break;
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case typeDouble:
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rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
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rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble, &fpa11->fp_status);
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break;
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case typeExtended:
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@@ -74,11 +74,11 @@ unsigned int ExtendedCPDO(const unsigned int opcode)
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switch (fpa11->fType[Fn])
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{
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case typeSingle:
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rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
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rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
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break;
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case typeDouble:
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rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
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rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status);
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break;
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case typeExtended:
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@@ -94,30 +94,30 @@ unsigned int ExtendedCPDO(const unsigned int opcode)
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{
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/* dyadic opcodes */
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case ADF_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_add(rFn,rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_add(rFn,rFm, &fpa11->fp_status);
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break;
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case MUF_CODE:
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case FML_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_mul(rFn,rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_mul(rFn,rFm, &fpa11->fp_status);
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break;
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case SUF_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_sub(rFn,rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_sub(rFn,rFm, &fpa11->fp_status);
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break;
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case RSF_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_sub(rFm,rFn);
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fpa11->fpreg[Fd].fExtended = floatx80_sub(rFm,rFn, &fpa11->fp_status);
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break;
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case DVF_CODE:
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case FDV_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_div(rFn,rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_div(rFn,rFm, &fpa11->fp_status);
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break;
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case RDF_CODE:
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case FRD_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_div(rFm,rFn);
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fpa11->fpreg[Fd].fExtended = floatx80_div(rFm,rFn, &fpa11->fp_status);
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break;
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#if 0
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@@ -131,7 +131,7 @@ unsigned int ExtendedCPDO(const unsigned int opcode)
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#endif
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case RMF_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_rem(rFn,rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_rem(rFn,rFm, &fpa11->fp_status);
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break;
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#if 0
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@@ -157,11 +157,11 @@ unsigned int ExtendedCPDO(const unsigned int opcode)
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case RND_CODE:
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case URD_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_round_to_int(rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_round_to_int(rFm, &fpa11->fp_status);
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break;
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case SQT_CODE:
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fpa11->fpreg[Fd].fExtended = floatx80_sqrt(rFm);
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fpa11->fpreg[Fd].fExtended = floatx80_sqrt(rFm, &fpa11->fp_status);
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break;
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#if 0
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+15
-10
@@ -61,74 +61,79 @@ void resetFPA11(void)
|
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void SetRoundingMode(const unsigned int opcode)
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{
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#if MAINTAIN_FPCR
|
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int rounding_mode;
|
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FPA11 *fpa11 = GET_FPA11();
|
||||
|
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#if MAINTAIN_FPCR
|
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fpa11->fpcr &= ~MASK_ROUNDING_MODE;
|
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#endif
|
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switch (opcode & MASK_ROUNDING_MODE)
|
||||
{
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||||
default:
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case ROUND_TO_NEAREST:
|
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float_rounding_mode = float_round_nearest_even;
|
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rounding_mode = float_round_nearest_even;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_TO_NEAREST;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case ROUND_TO_PLUS_INFINITY:
|
||||
float_rounding_mode = float_round_up;
|
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rounding_mode = float_round_up;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_TO_PLUS_INFINITY;
|
||||
#endif
|
||||
break;
|
||||
|
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case ROUND_TO_MINUS_INFINITY:
|
||||
float_rounding_mode = float_round_down;
|
||||
rounding_mode = float_round_down;
|
||||
#if MAINTAIN_FPCR
|
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fpa11->fpcr |= ROUND_TO_MINUS_INFINITY;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case ROUND_TO_ZERO:
|
||||
float_rounding_mode = float_round_to_zero;
|
||||
rounding_mode = float_round_to_zero;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_TO_ZERO;
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
set_float_rounding_mode(rounding_mode, &fpa11->fp_status);
|
||||
}
|
||||
|
||||
void SetRoundingPrecision(const unsigned int opcode)
|
||||
{
|
||||
#if MAINTAIN_FPCR
|
||||
int rounding_precision;
|
||||
FPA11 *fpa11 = GET_FPA11();
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr &= ~MASK_ROUNDING_PRECISION;
|
||||
#endif
|
||||
switch (opcode & MASK_ROUNDING_PRECISION)
|
||||
{
|
||||
case ROUND_SINGLE:
|
||||
floatx80_rounding_precision = 32;
|
||||
rounding_precision = 32;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_SINGLE;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case ROUND_DOUBLE:
|
||||
floatx80_rounding_precision = 64;
|
||||
rounding_precision = 64;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_DOUBLE;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case ROUND_EXTENDED:
|
||||
floatx80_rounding_precision = 80;
|
||||
rounding_precision = 80;
|
||||
#if MAINTAIN_FPCR
|
||||
fpa11->fpcr |= ROUND_EXTENDED;
|
||||
#endif
|
||||
break;
|
||||
|
||||
default: floatx80_rounding_precision = 80;
|
||||
default: rounding_precision = 80;
|
||||
}
|
||||
set_floatx80_rounding_precision(rounding_precision, &fpa11->fp_status);
|
||||
}
|
||||
|
||||
/* Emulate the instruction in the opcode. */
|
||||
|
||||
@@ -83,6 +83,7 @@ typedef struct tagFPA11 {
|
||||
so we can use it to detect whether this
|
||||
instance of the emulator needs to be
|
||||
initialised. */
|
||||
float_status fp_status; /* QEMU float emulator status */
|
||||
} FPA11;
|
||||
|
||||
extern FPA11* qemufpa;
|
||||
|
||||
@@ -80,10 +80,10 @@ unsigned int EmulateCPDO(const unsigned int opcode)
|
||||
{
|
||||
if (typeDouble == nType)
|
||||
fpa11->fpreg[Fd].fSingle =
|
||||
float64_to_float32(fpa11->fpreg[Fd].fDouble);
|
||||
float64_to_float32(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status);
|
||||
else
|
||||
fpa11->fpreg[Fd].fSingle =
|
||||
floatx80_to_float32(fpa11->fpreg[Fd].fExtended);
|
||||
floatx80_to_float32(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -91,10 +91,10 @@ unsigned int EmulateCPDO(const unsigned int opcode)
|
||||
{
|
||||
if (typeSingle == nType)
|
||||
fpa11->fpreg[Fd].fDouble =
|
||||
float32_to_float64(fpa11->fpreg[Fd].fSingle);
|
||||
float32_to_float64(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status);
|
||||
else
|
||||
fpa11->fpreg[Fd].fDouble =
|
||||
floatx80_to_float64(fpa11->fpreg[Fd].fExtended);
|
||||
floatx80_to_float64(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -102,10 +102,10 @@ unsigned int EmulateCPDO(const unsigned int opcode)
|
||||
{
|
||||
if (typeSingle == nType)
|
||||
fpa11->fpreg[Fd].fExtended =
|
||||
float32_to_floatx80(fpa11->fpreg[Fd].fSingle);
|
||||
float32_to_floatx80(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status);
|
||||
else
|
||||
fpa11->fpreg[Fd].fExtended =
|
||||
float64_to_floatx80(fpa11->fpreg[Fd].fDouble);
|
||||
float64_to_floatx80(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
@@ -106,11 +106,11 @@ void storeSingle(const unsigned int Fn,unsigned int *pMem)
|
||||
switch (fpa11->fType[Fn])
|
||||
{
|
||||
case typeDouble:
|
||||
val = float64_to_float32(fpa11->fpreg[Fn].fDouble);
|
||||
val = float64_to_float32(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeExtended:
|
||||
val = floatx80_to_float32(fpa11->fpreg[Fn].fExtended);
|
||||
val = floatx80_to_float32(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
default: val = fpa11->fpreg[Fn].fSingle;
|
||||
@@ -129,11 +129,11 @@ void storeDouble(const unsigned int Fn,unsigned int *pMem)
|
||||
switch (fpa11->fType[Fn])
|
||||
{
|
||||
case typeSingle:
|
||||
val = float32_to_float64(fpa11->fpreg[Fn].fSingle);
|
||||
val = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeExtended:
|
||||
val = floatx80_to_float64(fpa11->fpreg[Fn].fExtended);
|
||||
val = floatx80_to_float64(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
default: val = fpa11->fpreg[Fn].fDouble;
|
||||
@@ -157,11 +157,11 @@ void storeExtended(const unsigned int Fn,unsigned int *pMem)
|
||||
switch (fpa11->fType[Fn])
|
||||
{
|
||||
case typeSingle:
|
||||
val = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
|
||||
val = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeDouble:
|
||||
val = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
|
||||
val = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
default: val = fpa11->fpreg[Fn].fExtended;
|
||||
|
||||
@@ -21,7 +21,6 @@
|
||||
*/
|
||||
|
||||
#include "fpa11.h"
|
||||
#include "milieu.h"
|
||||
#include "softfloat.h"
|
||||
#include "fpopcode.h"
|
||||
#include "fpa11.inl"
|
||||
@@ -89,7 +88,7 @@ unsigned int PerformFLT(const unsigned int opcode)
|
||||
{
|
||||
fpa11->fType[getFn(opcode)] = typeSingle;
|
||||
fpa11->fpreg[getFn(opcode)].fSingle =
|
||||
int32_to_float32(readRegister(getRd(opcode)));
|
||||
int32_to_float32(readRegister(getRd(opcode)), &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -97,7 +96,7 @@ unsigned int PerformFLT(const unsigned int opcode)
|
||||
{
|
||||
fpa11->fType[getFn(opcode)] = typeDouble;
|
||||
fpa11->fpreg[getFn(opcode)].fDouble =
|
||||
int32_to_float64(readRegister(getRd(opcode)));
|
||||
int32_to_float64(readRegister(getRd(opcode)), &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -105,7 +104,7 @@ unsigned int PerformFLT(const unsigned int opcode)
|
||||
{
|
||||
fpa11->fType[getFn(opcode)] = typeExtended;
|
||||
fpa11->fpreg[getFn(opcode)].fExtended =
|
||||
int32_to_floatx80(readRegister(getRd(opcode)));
|
||||
int32_to_floatx80(readRegister(getRd(opcode)), &fpa11->fp_status);
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -128,7 +127,7 @@ unsigned int PerformFIX(const unsigned int opcode)
|
||||
case typeSingle:
|
||||
{
|
||||
writeRegister(getRd(opcode),
|
||||
float32_to_int32(fpa11->fpreg[Fn].fSingle));
|
||||
float32_to_int32(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status));
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -136,14 +135,14 @@ unsigned int PerformFIX(const unsigned int opcode)
|
||||
{
|
||||
//printf("F%d is 0x%llx\n",Fn,fpa11->fpreg[Fn].fDouble);
|
||||
writeRegister(getRd(opcode),
|
||||
float64_to_int32(fpa11->fpreg[Fn].fDouble));
|
||||
float64_to_int32(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status));
|
||||
}
|
||||
break;
|
||||
|
||||
case typeExtended:
|
||||
{
|
||||
writeRegister(getRd(opcode),
|
||||
floatx80_to_int32(fpa11->fpreg[Fn].fExtended));
|
||||
floatx80_to_int32(fpa11->fpreg[Fn].fExtended, &fpa11->fp_status));
|
||||
}
|
||||
break;
|
||||
|
||||
@@ -157,22 +156,23 @@ unsigned int PerformFIX(const unsigned int opcode)
|
||||
static unsigned int __inline__
|
||||
PerformComparisonOperation(floatx80 Fn, floatx80 Fm)
|
||||
{
|
||||
FPA11 *fpa11 = GET_FPA11();
|
||||
unsigned int flags = 0;
|
||||
|
||||
/* test for less than condition */
|
||||
if (floatx80_lt(Fn,Fm))
|
||||
if (floatx80_lt(Fn,Fm, &fpa11->fp_status))
|
||||
{
|
||||
flags |= CC_NEGATIVE;
|
||||
}
|
||||
|
||||
/* test for equal condition */
|
||||
if (floatx80_eq(Fn,Fm))
|
||||
if (floatx80_eq(Fn,Fm, &fpa11->fp_status))
|
||||
{
|
||||
flags |= CC_ZERO;
|
||||
}
|
||||
|
||||
/* test for greater than or equal condition */
|
||||
if (floatx80_lt(Fm,Fn))
|
||||
if (floatx80_lt(Fm,Fn, &fpa11->fp_status))
|
||||
{
|
||||
flags |= CC_CARRY;
|
||||
}
|
||||
@@ -208,14 +208,14 @@ static unsigned int PerformComparison(const unsigned int opcode)
|
||||
//printk("single.\n");
|
||||
if (float32_is_nan(fpa11->fpreg[Fn].fSingle))
|
||||
goto unordered;
|
||||
rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
|
||||
rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeDouble:
|
||||
//printk("double.\n");
|
||||
if (float64_is_nan(fpa11->fpreg[Fn].fDouble))
|
||||
goto unordered;
|
||||
rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
|
||||
rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeExtended:
|
||||
@@ -244,14 +244,14 @@ static unsigned int PerformComparison(const unsigned int opcode)
|
||||
//printk("single.\n");
|
||||
if (float32_is_nan(fpa11->fpreg[Fm].fSingle))
|
||||
goto unordered;
|
||||
rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
|
||||
rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeDouble:
|
||||
//printk("double.\n");
|
||||
if (float64_is_nan(fpa11->fpreg[Fm].fDouble))
|
||||
goto unordered;
|
||||
rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
|
||||
rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case typeExtended:
|
||||
@@ -283,7 +283,7 @@ static unsigned int PerformComparison(const unsigned int opcode)
|
||||
|
||||
if (BIT_AC & readFPSR()) flags |= CC_CARRY;
|
||||
|
||||
if (e_flag) float_raise(float_flag_invalid);
|
||||
if (e_flag) float_raise(float_flag_invalid, &fpa11->fp_status);
|
||||
|
||||
writeConditionCodes(flags);
|
||||
return 1;
|
||||
|
||||
@@ -27,14 +27,14 @@
|
||||
//#include "fpmodule.inl"
|
||||
|
||||
const floatx80 floatx80Constant[] = {
|
||||
{ 0x0000, 0x0000000000000000ULL}, /* extended 0.0 */
|
||||
{ 0x3fff, 0x8000000000000000ULL}, /* extended 1.0 */
|
||||
{ 0x4000, 0x8000000000000000ULL}, /* extended 2.0 */
|
||||
{ 0x4000, 0xc000000000000000ULL}, /* extended 3.0 */
|
||||
{ 0x4001, 0x8000000000000000ULL}, /* extended 4.0 */
|
||||
{ 0x4001, 0xa000000000000000ULL}, /* extended 5.0 */
|
||||
{ 0x3ffe, 0x8000000000000000ULL}, /* extended 0.5 */
|
||||
{ 0x4002, 0xa000000000000000ULL} /* extended 10.0 */
|
||||
{ 0x0000000000000000ULL, 0x0000}, /* extended 0.0 */
|
||||
{ 0x8000000000000000ULL, 0x3fff}, /* extended 1.0 */
|
||||
{ 0x8000000000000000ULL, 0x4000}, /* extended 2.0 */
|
||||
{ 0xc000000000000000ULL, 0x4000}, /* extended 3.0 */
|
||||
{ 0x8000000000000000ULL, 0x4001}, /* extended 4.0 */
|
||||
{ 0xa000000000000000ULL, 0x4001}, /* extended 5.0 */
|
||||
{ 0x8000000000000000ULL, 0x3ffe}, /* extended 0.5 */
|
||||
{ 0xa000000000000000ULL, 0x4002} /* extended 10.0 */
|
||||
};
|
||||
|
||||
const float64 float64Constant[] = {
|
||||
|
||||
@@ -1,48 +0,0 @@
|
||||
|
||||
/*
|
||||
===============================================================================
|
||||
|
||||
This C header file is part of the SoftFloat IEC/IEEE Floating-point
|
||||
Arithmetic Package, Release 2.
|
||||
|
||||
Written by John R. Hauser. This work was made possible in part by the
|
||||
International Computer Science Institute, located at Suite 600, 1947 Center
|
||||
Street, Berkeley, California 94704. Funding was partially provided by the
|
||||
National Science Foundation under grant MIP-9311980. The original version
|
||||
of this code was written as part of a project to build a fixed-point vector
|
||||
processor in collaboration with the University of California at Berkeley,
|
||||
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
|
||||
is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
|
||||
arithmetic/softfloat.html'.
|
||||
|
||||
THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
|
||||
has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
|
||||
TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
|
||||
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
|
||||
AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
|
||||
|
||||
Derivative works are acceptable, even for commercial purposes, so long as
|
||||
(1) they include prominent notice that the work is derivative, and (2) they
|
||||
include prominent notice akin to these three paragraphs for those parts of
|
||||
this code that are retained.
|
||||
|
||||
===============================================================================
|
||||
*/
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Include common integer types and flags.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#include "ARM-gcc.h"
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Symbolic Boolean literals.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
enum {
|
||||
FALSE = 0,
|
||||
TRUE = 1
|
||||
};
|
||||
|
||||
@@ -76,30 +76,30 @@ unsigned int SingleCPDO(const unsigned int opcode)
|
||||
{
|
||||
/* dyadic opcodes */
|
||||
case ADF_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_add(rFn,rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_add(rFn,rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case MUF_CODE:
|
||||
case FML_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_mul(rFn,rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_mul(rFn,rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case SUF_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_sub(rFn,rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_sub(rFn,rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case RSF_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_sub(rFm,rFn);
|
||||
fpa11->fpreg[Fd].fSingle = float32_sub(rFm,rFn, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case DVF_CODE:
|
||||
case FDV_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_div(rFn,rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_div(rFn,rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case RDF_CODE:
|
||||
case FRD_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_div(rFm,rFn);
|
||||
fpa11->fpreg[Fd].fSingle = float32_div(rFm,rFn, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
#if 0
|
||||
@@ -113,7 +113,7 @@ unsigned int SingleCPDO(const unsigned int opcode)
|
||||
#endif
|
||||
|
||||
case RMF_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_rem(rFn,rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_rem(rFn,rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
#if 0
|
||||
@@ -139,11 +139,11 @@ unsigned int SingleCPDO(const unsigned int opcode)
|
||||
|
||||
case RND_CODE:
|
||||
case URD_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_round_to_int(rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_round_to_int(rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
case SQT_CODE:
|
||||
fpa11->fpreg[Fd].fSingle = float32_sqrt(rFm);
|
||||
fpa11->fpreg[Fd].fSingle = float32_sqrt(rFm, &fpa11->fp_status);
|
||||
break;
|
||||
|
||||
#if 0
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@@ -1,366 +0,0 @@
|
||||
|
||||
/*
|
||||
===============================================================================
|
||||
|
||||
This C source fragment is part of the SoftFloat IEC/IEEE Floating-point
|
||||
Arithmetic Package, Release 2.
|
||||
|
||||
Written by John R. Hauser. This work was made possible in part by the
|
||||
International Computer Science Institute, located at Suite 600, 1947 Center
|
||||
Street, Berkeley, California 94704. Funding was partially provided by the
|
||||
National Science Foundation under grant MIP-9311980. The original version
|
||||
of this code was written as part of a project to build a fixed-point vector
|
||||
processor in collaboration with the University of California at Berkeley,
|
||||
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
|
||||
is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
|
||||
arithmetic/softfloat.html'.
|
||||
|
||||
THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
|
||||
has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
|
||||
TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
|
||||
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
|
||||
AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
|
||||
|
||||
Derivative works are acceptable, even for commercial purposes, so long as
|
||||
(1) they include prominent notice that the work is derivative, and (2) they
|
||||
include prominent notice akin to these three paragraphs for those parts of
|
||||
this code that are retained.
|
||||
|
||||
===============================================================================
|
||||
*/
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Underflow tininess-detection mode, statically initialized to default value.
|
||||
(The declaration in `softfloat.h' must match the `int8' type here.)
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
int8 float_detect_tininess = float_tininess_after_rounding;
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Raises the exceptions specified by `flags'. Floating-point traps can be
|
||||
defined here if desired. It is currently not possible for such a trap to
|
||||
substitute a result value. If traps are not implemented, this routine
|
||||
should be simply `float_exception_flags |= flags;'.
|
||||
|
||||
ScottB: November 4, 1998
|
||||
Moved this function out of softfloat-specialize into fpmodule.c.
|
||||
This effectively isolates all the changes required for integrating with the
|
||||
Linux kernel into fpmodule.c. Porting to NetBSD should only require modifying
|
||||
fpmodule.c to integrate with the NetBSD kernel (I hope!).
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
void float_raise( int8 flags )
|
||||
{
|
||||
float_exception_flags |= flags;
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Internal canonical NaN format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
typedef struct {
|
||||
flag sign;
|
||||
bits64 high, low;
|
||||
} commonNaNT;
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
The pattern for a default generated single-precision NaN.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#define float32_default_nan 0xFFFFFFFF
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the single-precision floating-point value `a' is a NaN;
|
||||
otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float32_is_nan( float32 a )
|
||||
{
|
||||
|
||||
return ( 0xFF000000 < (bits32) ( a<<1 ) );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the single-precision floating-point value `a' is a signaling
|
||||
NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float32_is_signaling_nan( float32 a )
|
||||
{
|
||||
|
||||
return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the single-precision floating-point NaN
|
||||
`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
|
||||
exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static commonNaNT float32ToCommonNaN( float32 a )
|
||||
{
|
||||
commonNaNT z;
|
||||
|
||||
if ( float32_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
|
||||
z.sign = a>>31;
|
||||
z.low = 0;
|
||||
z.high = ( (bits64) a )<<41;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the single-
|
||||
precision floating-point format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float32 commonNaNToFloat32( commonNaNT a )
|
||||
{
|
||||
|
||||
return ( ( (bits32) a.sign )<<31 ) | 0x7FC00000 | ( a.high>>41 );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two single-precision floating-point values `a' and `b', one of which
|
||||
is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
|
||||
signaling NaN, the invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float32 propagateFloat32NaN( float32 a, float32 b )
|
||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
|
||||
|
||||
aIsNaN = float32_is_nan( a );
|
||||
aIsSignalingNaN = float32_is_signaling_nan( a );
|
||||
bIsNaN = float32_is_nan( b );
|
||||
bIsSignalingNaN = float32_is_signaling_nan( b );
|
||||
a |= 0x00400000;
|
||||
b |= 0x00400000;
|
||||
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
||||
if ( aIsNaN ) {
|
||||
return ( aIsSignalingNaN & bIsNaN ) ? b : a;
|
||||
}
|
||||
else {
|
||||
return b;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
The pattern for a default generated double-precision NaN.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#define float64_default_nan LIT64( 0xFFFFFFFFFFFFFFFF )
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the double-precision floating-point value `a' is a NaN;
|
||||
otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float64_is_nan( float64 a )
|
||||
{
|
||||
|
||||
return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the double-precision floating-point value `a' is a signaling
|
||||
NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float64_is_signaling_nan( float64 a )
|
||||
{
|
||||
|
||||
return
|
||||
( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
|
||||
&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the double-precision floating-point NaN
|
||||
`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
|
||||
exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static commonNaNT float64ToCommonNaN( float64 a )
|
||||
{
|
||||
commonNaNT z;
|
||||
|
||||
if ( float64_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
|
||||
z.sign = a>>63;
|
||||
z.low = 0;
|
||||
z.high = a<<12;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the double-
|
||||
precision floating-point format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float64 commonNaNToFloat64( commonNaNT a )
|
||||
{
|
||||
|
||||
return
|
||||
( ( (bits64) a.sign )<<63 )
|
||||
| LIT64( 0x7FF8000000000000 )
|
||||
| ( a.high>>12 );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two double-precision floating-point values `a' and `b', one of which
|
||||
is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
|
||||
signaling NaN, the invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float64 propagateFloat64NaN( float64 a, float64 b )
|
||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
|
||||
|
||||
aIsNaN = float64_is_nan( a );
|
||||
aIsSignalingNaN = float64_is_signaling_nan( a );
|
||||
bIsNaN = float64_is_nan( b );
|
||||
bIsSignalingNaN = float64_is_signaling_nan( b );
|
||||
a |= LIT64( 0x0008000000000000 );
|
||||
b |= LIT64( 0x0008000000000000 );
|
||||
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
||||
if ( aIsNaN ) {
|
||||
return ( aIsSignalingNaN & bIsNaN ) ? b : a;
|
||||
}
|
||||
else {
|
||||
return b;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#ifdef FLOATX80
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
The pattern for a default generated extended double-precision NaN. The
|
||||
`high' and `low' values hold the most- and least-significant bits,
|
||||
respectively.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#define floatx80_default_nan_high 0xFFFF
|
||||
#define floatx80_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF )
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the extended double-precision floating-point value `a' is a
|
||||
NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag floatx80_is_nan( floatx80 a )
|
||||
{
|
||||
|
||||
return ( ( a.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( a.low<<1 );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the extended double-precision floating-point value `a' is a
|
||||
signaling NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag floatx80_is_signaling_nan( floatx80 a )
|
||||
{
|
||||
//register int lr;
|
||||
bits64 aLow;
|
||||
|
||||
//__asm__("mov %0, lr" : : "g" (lr));
|
||||
//fp_printk("floatx80_is_signalling_nan() called from 0x%08x\n",lr);
|
||||
aLow = a.low & ~ LIT64( 0x4000000000000000 );
|
||||
return
|
||||
( ( a.high & 0x7FFF ) == 0x7FFF )
|
||||
&& (bits64) ( aLow<<1 )
|
||||
&& ( a.low == aLow );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the extended double-precision floating-
|
||||
point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
|
||||
invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static commonNaNT floatx80ToCommonNaN( floatx80 a )
|
||||
{
|
||||
commonNaNT z;
|
||||
|
||||
if ( floatx80_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
|
||||
z.sign = a.high>>15;
|
||||
z.low = 0;
|
||||
z.high = a.low<<1;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the extended
|
||||
double-precision floating-point format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static floatx80 commonNaNToFloatx80( commonNaNT a )
|
||||
{
|
||||
floatx80 z;
|
||||
|
||||
z.low = LIT64( 0xC000000000000000 ) | ( a.high>>1 );
|
||||
z.high = ( ( (bits16) a.sign )<<15 ) | 0x7FFF;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two extended double-precision floating-point values `a' and `b', one
|
||||
of which is a NaN, and returns the appropriate NaN result. If either `a' or
|
||||
`b' is a signaling NaN, the invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b )
|
||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
|
||||
|
||||
aIsNaN = floatx80_is_nan( a );
|
||||
aIsSignalingNaN = floatx80_is_signaling_nan( a );
|
||||
bIsNaN = floatx80_is_nan( b );
|
||||
bIsSignalingNaN = floatx80_is_signaling_nan( b );
|
||||
a.low |= LIT64( 0xC000000000000000 );
|
||||
b.low |= LIT64( 0xC000000000000000 );
|
||||
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
||||
if ( aIsNaN ) {
|
||||
return ( aIsSignalingNaN & bIsNaN ) ? b : a;
|
||||
}
|
||||
else {
|
||||
return b;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
File diff suppressed because it is too large
Load Diff
@@ -1,232 +0,0 @@
|
||||
|
||||
/*
|
||||
===============================================================================
|
||||
|
||||
This C header file is part of the SoftFloat IEC/IEEE Floating-point
|
||||
Arithmetic Package, Release 2.
|
||||
|
||||
Written by John R. Hauser. This work was made possible in part by the
|
||||
International Computer Science Institute, located at Suite 600, 1947 Center
|
||||
Street, Berkeley, California 94704. Funding was partially provided by the
|
||||
National Science Foundation under grant MIP-9311980. The original version
|
||||
of this code was written as part of a project to build a fixed-point vector
|
||||
processor in collaboration with the University of California at Berkeley,
|
||||
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
|
||||
is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
|
||||
arithmetic/softfloat.html'.
|
||||
|
||||
THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
|
||||
has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
|
||||
TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
|
||||
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
|
||||
AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
|
||||
|
||||
Derivative works are acceptable, even for commercial purposes, so long as
|
||||
(1) they include prominent notice that the work is derivative, and (2) they
|
||||
include prominent notice akin to these three paragraphs for those parts of
|
||||
this code that are retained.
|
||||
|
||||
===============================================================================
|
||||
*/
|
||||
|
||||
#ifndef __SOFTFLOAT_H__
|
||||
#define __SOFTFLOAT_H__
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
The macro `FLOATX80' must be defined to enable the extended double-precision
|
||||
floating-point format `floatx80'. If this macro is not defined, the
|
||||
`floatx80' type will not be defined, and none of the functions that either
|
||||
input or output the `floatx80' type will be defined.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#define FLOATX80
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE floating-point types.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
typedef unsigned long int float32;
|
||||
typedef unsigned long long float64;
|
||||
typedef struct {
|
||||
unsigned short high;
|
||||
unsigned long long low;
|
||||
} floatx80;
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE floating-point underflow tininess-detection mode.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
extern signed char float_detect_tininess;
|
||||
enum {
|
||||
float_tininess_after_rounding = 0,
|
||||
float_tininess_before_rounding = 1
|
||||
};
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE floating-point rounding mode.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
extern signed char float_rounding_mode;
|
||||
enum {
|
||||
float_round_nearest_even = 0,
|
||||
float_round_to_zero = 1,
|
||||
float_round_down = 2,
|
||||
float_round_up = 3
|
||||
};
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE floating-point exception flags.
|
||||
-------------------------------------------------------------------------------
|
||||
extern signed char float_exception_flags;
|
||||
enum {
|
||||
float_flag_inexact = 1,
|
||||
float_flag_underflow = 2,
|
||||
float_flag_overflow = 4,
|
||||
float_flag_divbyzero = 8,
|
||||
float_flag_invalid = 16
|
||||
};
|
||||
|
||||
ScottB: November 4, 1998
|
||||
Changed the enumeration to match the bit order in the FPA11.
|
||||
*/
|
||||
|
||||
extern signed char float_exception_flags;
|
||||
enum {
|
||||
float_flag_invalid = 1,
|
||||
float_flag_divbyzero = 2,
|
||||
float_flag_overflow = 4,
|
||||
float_flag_underflow = 8,
|
||||
float_flag_inexact = 16
|
||||
};
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Routine to raise any or all of the software IEC/IEEE floating-point
|
||||
exception flags.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
void float_raise( signed char );
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE integer-to-floating-point conversion routines.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
float32 int32_to_float32( signed int );
|
||||
float64 int32_to_float64( signed int );
|
||||
#ifdef FLOATX80
|
||||
floatx80 int32_to_floatx80( signed int );
|
||||
#endif
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE single-precision conversion routines.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
signed int float32_to_int32( float32 );
|
||||
signed int float32_to_int32_round_to_zero( float32 );
|
||||
float64 float32_to_float64( float32 );
|
||||
#ifdef FLOATX80
|
||||
floatx80 float32_to_floatx80( float32 );
|
||||
#endif
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE single-precision operations.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
float32 float32_round_to_int( float32 );
|
||||
float32 float32_add( float32, float32 );
|
||||
float32 float32_sub( float32, float32 );
|
||||
float32 float32_mul( float32, float32 );
|
||||
float32 float32_div( float32, float32 );
|
||||
float32 float32_rem( float32, float32 );
|
||||
float32 float32_sqrt( float32 );
|
||||
char float32_eq( float32, float32 );
|
||||
char float32_le( float32, float32 );
|
||||
char float32_lt( float32, float32 );
|
||||
char float32_eq_signaling( float32, float32 );
|
||||
char float32_le_quiet( float32, float32 );
|
||||
char float32_lt_quiet( float32, float32 );
|
||||
char float32_is_signaling_nan( float32 );
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE double-precision conversion routines.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
signed int float64_to_int32( float64 );
|
||||
signed int float64_to_int32_round_to_zero( float64 );
|
||||
float32 float64_to_float32( float64 );
|
||||
#ifdef FLOATX80
|
||||
floatx80 float64_to_floatx80( float64 );
|
||||
#endif
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE double-precision operations.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
float64 float64_round_to_int( float64 );
|
||||
float64 float64_add( float64, float64 );
|
||||
float64 float64_sub( float64, float64 );
|
||||
float64 float64_mul( float64, float64 );
|
||||
float64 float64_div( float64, float64 );
|
||||
float64 float64_rem( float64, float64 );
|
||||
float64 float64_sqrt( float64 );
|
||||
char float64_eq( float64, float64 );
|
||||
char float64_le( float64, float64 );
|
||||
char float64_lt( float64, float64 );
|
||||
char float64_eq_signaling( float64, float64 );
|
||||
char float64_le_quiet( float64, float64 );
|
||||
char float64_lt_quiet( float64, float64 );
|
||||
char float64_is_signaling_nan( float64 );
|
||||
|
||||
#ifdef FLOATX80
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE extended double-precision conversion routines.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
signed int floatx80_to_int32( floatx80 );
|
||||
signed int floatx80_to_int32_round_to_zero( floatx80 );
|
||||
float32 floatx80_to_float32( floatx80 );
|
||||
float64 floatx80_to_float64( floatx80 );
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE extended double-precision rounding precision. Valid
|
||||
values are 32, 64, and 80.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
extern signed char floatx80_rounding_precision;
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Software IEC/IEEE extended double-precision operations.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
floatx80 floatx80_round_to_int( floatx80 );
|
||||
floatx80 floatx80_add( floatx80, floatx80 );
|
||||
floatx80 floatx80_sub( floatx80, floatx80 );
|
||||
floatx80 floatx80_mul( floatx80, floatx80 );
|
||||
floatx80 floatx80_div( floatx80, floatx80 );
|
||||
floatx80 floatx80_rem( floatx80, floatx80 );
|
||||
floatx80 floatx80_sqrt( floatx80 );
|
||||
char floatx80_eq( floatx80, floatx80 );
|
||||
char floatx80_le( floatx80, floatx80 );
|
||||
char floatx80_lt( floatx80, floatx80 );
|
||||
char floatx80_eq_signaling( floatx80, floatx80 );
|
||||
char floatx80_le_quiet( floatx80, floatx80 );
|
||||
char floatx80_lt_quiet( floatx80, floatx80 );
|
||||
char floatx80_is_signaling_nan( floatx80 );
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user