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Altera_Forum
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21 years ago

Compiler

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/mad.gif movia at,((90057600)/115200) 28: 00400034 movhi at,0 2c: 0840c354 ori at,at,781 movia at,((90000000+57600)/1152...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

maybe the compiler bug for the following test code:# test.S# define ALT_CPU_FREQ 90000000# define BAUD_RATE 2400 //1200# define C_DIVISOR ((ALT_CPU_FREQ+BAUD_RATE/2)/BAUD_RATE)

.equ A_DIVISOR , ((ALT_CPU_FREQ+BAUD_RATE/2)/BAUD_RATE)

.macro MOVUIK32 _reg,_val

.if (\_val >>16) == 0

MOVUI \_reg,%lo(\_val)

.elseif (\_val <<16) == 0

MOVHI \_reg,%hi(\_val)

.else

MOVIA \_reg,\_val

.endif

.endm

.section .text

.align 2

.set noat

_start:

MOVUIK32 r2,C_DIVISOR

MOVUIK32 r3,A_DIVISOR

.end

You may change the valu of ALT_CPU_FREQ and BAUD_RATE macros, and then check the compiling result!