40c4c3de40
Summary: The Freescale e500v2 PowerPC core does not use a standard FPU. Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor unit, which doubles as a FPU. The PowerPC SPE ABI is incompatible with the stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this. Additionaly, the SPE opcodes overlap with Altivec, so these are mutually exclusive. Taking advantage of this fact, a new file, powerpc/booke/spe.c, was created with the same function set as in powerpc/powerpc/altivec.c, so it becomes effectively a drop-in replacement. setjmp/longjmp were modified to save the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by the SPE). Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not support double-precision floating point. Also, without a new MACHINE_ARCH it would be impossible to provide binary packages which utilize the SPE. Additionally, no work has been done to support ports, work is needed for this. This also means no newer gcc can yet be used. However, gcc's powerpc support has been refactored which would make adding a powerpcspe-freebsd target very easy. Test Plan: This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222 (P1022-based) board, compiled against the new ABI. Base system utilities (/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot multiuser. Reviewed By: bdrewery, imp Relnotes: yes Differential Revision: https://reviews.freebsd.org/D5683
308 lines
11 KiB
C
308 lines
11 KiB
C
/* $NetBSD: softfloat.h,v 1.6 2002/05/12 13:12:46 bjh21 Exp $ */
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/* $FreeBSD$ */
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/* This is a derivative work. */
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/*
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===============================================================================
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This C header file is part of the SoftFloat IEC/IEEE Floating-point
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Arithmetic Package, Release 2a.
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Written by John R. Hauser. This work was made possible in part by the
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International Computer Science Institute, located at Suite 600, 1947 Center
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Street, Berkeley, California 94704. Funding was partially provided by the
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National Science Foundation under grant MIP-9311980. The original version
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of this code was written as part of a project to build a fixed-point vector
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processor in collaboration with the University of California at Berkeley,
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overseen by Profs. Nelson Morgan and John Wawrzynek. More information
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is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
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arithmetic/SoftFloat.html'.
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THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
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has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
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TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
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PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
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AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
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Derivative works are acceptable, even for commercial purposes, so long as
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(1) they include prominent notice that the work is derivative, and (2) they
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include prominent notice akin to these four paragraphs for those parts of
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this code that are retained.
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===============================================================================
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*/
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/*
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-------------------------------------------------------------------------------
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The macro `FLOATX80' must be defined to enable the extended double-precision
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floating-point format `floatx80'. If this macro is not defined, the
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`floatx80' type will not be defined, and none of the functions that either
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input or output the `floatx80' type will be defined. The same applies to
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the `FLOAT128' macro and the quadruple-precision format `float128'.
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-------------------------------------------------------------------------------
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*/
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/* #define FLOATX80 */
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/* #define FLOAT128 */
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#include <machine/ieeefp.h>
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE floating-point types.
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-------------------------------------------------------------------------------
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*/
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typedef unsigned int float32;
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typedef unsigned long long float64;
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#ifdef FLOATX80
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typedef struct {
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unsigned short high;
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unsigned long long low;
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} floatx80;
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#endif
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#ifdef FLOAT128
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typedef struct {
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unsigned long long high, low;
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} float128;
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE floating-point underflow tininess-detection mode.
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-------------------------------------------------------------------------------
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*/
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#ifndef SOFTFLOAT_FOR_GCC
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extern int8 float_detect_tininess;
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#endif
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enum {
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float_tininess_after_rounding = 0,
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float_tininess_before_rounding = 1
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};
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE floating-point rounding mode.
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-------------------------------------------------------------------------------
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*/
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extern fp_rnd_t float_rounding_mode;
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enum {
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float_round_nearest_even = FP_RN,
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float_round_to_zero = FP_RZ,
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float_round_down = FP_RM,
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float_round_up = FP_RP
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};
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE floating-point exception flags.
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-------------------------------------------------------------------------------
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*/
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typedef fp_except_t fp_except;
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extern fp_except float_exception_flags;
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extern fp_except float_exception_mask;
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enum {
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float_flag_inexact = FP_X_IMP,
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float_flag_underflow = FP_X_UFL,
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float_flag_overflow = FP_X_OFL,
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float_flag_divbyzero = FP_X_DZ,
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float_flag_invalid = FP_X_INV
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};
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/*
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-------------------------------------------------------------------------------
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Routine to raise any or all of the software IEC/IEEE floating-point
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exception flags.
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-------------------------------------------------------------------------------
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*/
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void float_raise( fp_except );
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE integer-to-floating-point conversion routines.
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-------------------------------------------------------------------------------
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*/
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float32 int32_to_float32( int );
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float64 int32_to_float64( int );
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#ifdef FLOATX80
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floatx80 int32_to_floatx80( int );
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#endif
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#ifdef FLOAT128
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float128 int32_to_float128( int );
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#endif
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float32 int64_to_float32( long long );
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float64 int64_to_float64( long long );
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#ifdef FLOATX80
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floatx80 int64_to_floatx80( long long );
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#endif
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#ifdef FLOAT128
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float128 int64_to_float128( long long );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE single-precision conversion routines.
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-------------------------------------------------------------------------------
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*/
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int float32_to_int32( float32 );
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int float32_to_int32_round_to_zero( float32 );
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unsigned int float32_to_uint32_round_to_zero( float32 );
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long long float32_to_int64( float32 );
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long long float32_to_int64_round_to_zero( float32 );
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float64 float32_to_float64( float32 );
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#ifdef FLOATX80
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floatx80 float32_to_floatx80( float32 );
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#endif
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#ifdef FLOAT128
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float128 float32_to_float128( float32 );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE single-precision operations.
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-------------------------------------------------------------------------------
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*/
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float32 float32_round_to_int( float32 );
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float32 float32_add( float32, float32 );
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float32 float32_sub( float32, float32 );
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float32 float32_mul( float32, float32 );
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float32 float32_div( float32, float32 );
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float32 float32_rem( float32, float32 );
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float32 float32_sqrt( float32 );
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int float32_eq( float32, float32 );
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int float32_le( float32, float32 );
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int float32_lt( float32, float32 );
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int float32_eq_signaling( float32, float32 );
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int float32_le_quiet( float32, float32 );
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int float32_lt_quiet( float32, float32 );
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#ifndef SOFTFLOAT_FOR_GCC
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int float32_is_signaling_nan( float32 );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE double-precision conversion routines.
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-------------------------------------------------------------------------------
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*/
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int float64_to_int32( float64 );
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int float64_to_int32_round_to_zero( float64 );
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unsigned int float64_to_uint32_round_to_zero( float64 );
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long long float64_to_int64( float64 );
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long long float64_to_int64_round_to_zero( float64 );
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float32 float64_to_float32( float64 );
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#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 );
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#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE double-precision operations.
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-------------------------------------------------------------------------------
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*/
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float64 float64_round_to_int( float64 );
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float64 float64_add( float64, float64 );
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float64 float64_sub( float64, float64 );
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float64 float64_mul( float64, float64 );
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float64 float64_div( float64, float64 );
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float64 float64_rem( float64, float64 );
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float64 float64_sqrt( float64 );
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int float64_eq( float64, float64 );
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int float64_le( float64, float64 );
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int float64_lt( float64, float64 );
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int float64_eq_signaling( float64, float64 );
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int float64_le_quiet( float64, float64 );
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int float64_lt_quiet( float64, float64 );
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#ifndef SOFTFLOAT_FOR_GCC
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int float64_is_signaling_nan( float64 );
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#endif
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#ifdef FLOATX80
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE extended double-precision conversion routines.
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-------------------------------------------------------------------------------
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*/
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int floatx80_to_int32( floatx80 );
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int floatx80_to_int32_round_to_zero( floatx80 );
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long long floatx80_to_int64( floatx80 );
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long long floatx80_to_int64_round_to_zero( floatx80 );
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float32 floatx80_to_float32( floatx80 );
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float64 floatx80_to_float64( floatx80 );
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#ifdef FLOAT128
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float128 floatx80_to_float128( floatx80 );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE extended double-precision rounding precision. Valid
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values are 32, 64, and 80.
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-------------------------------------------------------------------------------
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*/
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extern int floatx80_rounding_precision;
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE extended double-precision operations.
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-------------------------------------------------------------------------------
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*/
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floatx80 floatx80_round_to_int( floatx80 );
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floatx80 floatx80_add( floatx80, floatx80 );
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floatx80 floatx80_sub( floatx80, floatx80 );
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floatx80 floatx80_mul( floatx80, floatx80 );
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floatx80 floatx80_div( floatx80, floatx80 );
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floatx80 floatx80_rem( floatx80, floatx80 );
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floatx80 floatx80_sqrt( floatx80 );
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int floatx80_eq( floatx80, floatx80 );
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int floatx80_le( floatx80, floatx80 );
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int floatx80_lt( floatx80, floatx80 );
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int floatx80_eq_signaling( floatx80, floatx80 );
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int floatx80_le_quiet( floatx80, floatx80 );
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int floatx80_lt_quiet( floatx80, floatx80 );
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int floatx80_is_signaling_nan( floatx80 );
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#endif
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#ifdef FLOAT128
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE quadruple-precision conversion routines.
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-------------------------------------------------------------------------------
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*/
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int float128_to_int32( float128 );
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int float128_to_int32_round_to_zero( float128 );
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long long float128_to_int64( float128 );
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long long float128_to_int64_round_to_zero( float128 );
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float32 float128_to_float32( float128 );
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float64 float128_to_float64( float128 );
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#ifdef FLOATX80
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floatx80 float128_to_floatx80( float128 );
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#endif
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/*
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-------------------------------------------------------------------------------
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Software IEC/IEEE quadruple-precision operations.
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-------------------------------------------------------------------------------
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*/
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float128 float128_round_to_int( float128 );
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float128 float128_add( float128, float128 );
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float128 float128_sub( float128, float128 );
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float128 float128_mul( float128, float128 );
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float128 float128_div( float128, float128 );
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float128 float128_rem( float128, float128 );
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float128 float128_sqrt( float128 );
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int float128_eq( float128, float128 );
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int float128_le( float128, float128 );
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int float128_lt( float128, float128 );
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int float128_eq_signaling( float128, float128 );
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int float128_le_quiet( float128, float128 );
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int float128_lt_quiet( float128, float128 );
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int float128_is_signaling_nan( float128 );
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#endif
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