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/*------------------------------------------------------------------------------------------
This file is part of FPlib V 0.3.0 Floating point library for Atmel AVR uC
Copyright (c) Michael Stumpf <mistumpf@de.pepperl-fuchs.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
ported to avr-as by Michael Rickmann <mrickma@gwdg.de>
for details see readme.fplib
*------------------------------------------------------------------------------------------
*/
#ifndef __FPLIB_INC
#define __FPLIB_INC
;--------------------------------------------------------------------
; fp lib register nicknames
#define rA3 rP0
#define rA2 rP1
#define rA1 rP2
#define rA0 rP3
#define rAE rTI2
#define rB3 rP4
#define rB2 rP5
#define rB1 rP6
#define rB0 rP7
#define rBE rTI3
#define rPH rP4 /* pointer argument */
#define rPL rP5
#define rT0 __tmp_reg__ /* first temporary */
#define rT1c __zero_reg__ /* 2nd temporary, clear after use */
/*--------------------------------------------------------------------------
* Library shapening :
*/
#define __OPTIMIZE__
/* #define __SIMPLE__NaNs simple NaNs implemented now */
/* #define __COMPLEX__NaNs */ /* not yet tested (and discarded anyway) */
/* #define __ERRNO__ */ /* not yet fully implemented */
#define EDOM 33
#define ERANGE 34
/*--------------------------------------------------------------------------
* math function macro
*/
.macro mLPMRdZpp rr
#ifdef __AVR_ENHANCED__
lpm \rr, Z+
#else
lpm
mov \rr, r0
adiw ZL, 1
#endif
.endm
#define LPMRdZpp(Rd) mLPMRdZpp Rd
/*--------------------------------------------------------------------------
* avr-as specific definitions for segments, functions and labels.
*/
#define LOW(x) lo8(x)
#define HIGH(x) hi8(x)
#define DCB .byte
#define ACCURACY 7 /* decimal digits */
#define retByte rByte /* FIXME: why has this been renamed ? */
/* Put constant tables at low addresses in program memory, so they are
reachable for "lpm" without using RAMPZ on >64K devices. */
#define PGM_SECTION .section .progmem.gcc_fplib,"a",@progbits
/* Unfortunately, we need both an assembler and a C preprocessor macro for
these. Assembler macros cannot do string concatenation for macro
parameters, and cpp macros cannot generate multiple lines. We need both. */
/* load floating point constant into fp pseudo register reg */
.macro fpload reg0, reg1, reg2, reg3, val
ldi \reg0, lo8(\val)
ldi \reg1, hi8(\val)
ldi \reg2, hlo8(\val)
ldi \reg3, hhi8(\val)
.endm
#define FPLOAD(reg, val) \
fpload reg##0, reg##1, reg##2, reg##3, val
/* move fp pseudo register src into dst */
.macro fpmov dst0, dst1, dst2, dst3, src0, src1, src2, src3
mov \dst0, \src0
mov \dst1, \src1
mov \dst2, \src2
mov \dst3, \src3
.endm
#define FPMOV(dst, src) \
fpmov dst##0, dst##1, dst##2, dst##3, \
src##0, src##1, src##2, src##3
/* push/pop fp pseudo register reg */
.macro fppush reg0, reg1, reg2, reg3
push \reg0
push \reg1
push \reg2
push \reg3
.endm
#define FPPUSH(reg) \
fppush reg##0, reg##1, reg##2, reg##3
.macro fppop reg3, reg2, reg1, reg0
pop \reg3
pop \reg2
pop \reg1
pop \reg0
.endm
#define FPPOP(reg) \
fppop reg##3, reg##2, reg##1, reg##0
.macro fpclr reg0, reg1, reg2, reg3
clr \reg0
clr \reg1
clr \reg2
clr \reg3
.endm
#define FPCLR(reg) \
fpclr reg##0, reg##1, reg##2, reg##3
/* swap fp pseudo registers A and B */
.macro fpswap
eor rA3, rB3
eor rB3, rA3
eor rA3, rB3
eor rA2, rB2
eor rB2, rA2
eor rA2, rB2
eor rA1, rB1
eor rB1, rA1
eor rA1, rB1
eor rA0, rB0
eor rB0, rA0
eor rA0, rB0
.endm
#define FPSWAP \
fpswap
#endif
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