[Sdcc-user] Floating Point on TINI

[Neil T. D. <ntd...@bs...>]

I'm trying to perform a spline interpolation on the TINI.  Wrote all the 
code and debugged it on my workstation, then went to compile it for the 
TINI and things broke.

I cannot compile floating point operations with SDCC.  It seems that the 
code for floating point operations is not being included.  I've 
included  a code sample, the assembly, and the macro and assembler 
output.  The problem seems to be with the following two lines of assembly:

    mov     dptr,#___fsdiv_PARM_2
      .........
    lcall    __fsdiv

Neither of those two symbols are defined.  Any ideas on how to fix the 
problem?


--------------------CODE--------------------------------
#include <float.h>

float fptest(float f)
{
    float a=1.2;
    return a/f;
}
---------END CODE--------------------------------------



-------ASSEMBLY------------------------------------
$BEGIN_MODULE(fptest)
;--------------------------------------------------------
; File Created by SDCC : FreeWare ANSI-C Compiler
; Version 2.4.1 (Jun 14 2004)
; This file generated Fri Jul  2 10:22:44 2004
;--------------------------------------------------------
    ; .file "fptest.c"
   
$include(tini.inc)
$include(ds80c390.inc)
$include(tinimacro.inc)
$include(apiequ.inc)
         ; _bpx (frame pointer) mapped to R8_B3:R7_B3
         ; _ap mapped to R6_B3
Lib_Native_Init:
    clr    a
    ret
LibraryID:
    db "DS"
    db 0, 0, 0, 0, 0, 1
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
    ; .globl fptest
;------------------------------------------------------------
;Allocation info for local variables in function 'fptest'
;------------------------------------------------------------
;f                         Allocated to registers
;a                         Allocated to registers
;------------------------------------------------------------
;    fptest.c:3: float fptest(float f)
;    genFunction
;    -----------------------------------------
;     function fptest
;    -----------------------------------------
fptest:
;    genReceive
    mov     086h,#01h
    mov     dptr,#___fsdiv_PARM_2
    mov    a,dpl
    movx    @dptr,a
    inc    dptr
    mov    a,dph
    movx    @dptr,a
    inc    dptr
    mov    a,093h
    movx    @dptr,a
    inc    dptr
    mov    a,b
    movx    @dptr,a
    mov    086h,#00h
;    fptest.c:6: return a/f;
;    genCall
;    genSend argreg = 1, size = 4
; Peephole 182   used 16 bit load of dptr
    mov  dptr,#  0999Ah
    mov    093h,#099h
    mov    b,#03Fh
    lcall    __fsdiv
;    genRet
;    genLabel
L00101:
;    genEndFunction
    ret
    ; SECTION NOT SUPPORTED
   
$END_MODULE
end
---------------------END ASSEMBLER-----------------------------


--------------------COMPILER OUTPUT----------------------
+---------------------------------------------------------------------------+
| Dallas Semiconductor DS80C390 Macro Preprocessor, Beta Version 
0.601.0055 |
+---------------------------------------------------------------------------+
Last build Aug 22 2003 at 08:45:01
 
Parsing fptest.a51...
 
Parser terminated without error
 
+------------------------------------------------------------------+
| Dallas Semiconductor DS80C390 Assembler, Beta Version 0.121.0022 |
+------------------------------------------------------------------+
Last build Jan 24 2003 at 11:29:21
 
Starting pass 1...
Starting pass 2...
File: fptest.mpp, line: 73, Undefined symbol ___FSDIV_PARM_2.
        Last token read was "___fsdiv_PARM_2".
--------------END COMPILER OUTPUT----------------------



Neil Dantam