mad-user April 2007

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Compiling LIBMAD for ARM
by Karthika 02 Apr '07

02 Apr '07

Helloo, I am trying to compile LIBMAD for ARM7TDMI on Metrowerks Codewarrior tool. The processor specific options for ARM are present in the file fixed.h. I have taken those options which are specific for ARM and included them in a new header file called "asm.h" ( given below).I have included this "asm.h" file in my project. Then, I have removed fixed.h from my project. Now, when I compile my project I get the errors for mad_f_mul and MAD_F_MLA. MAD_F_MLA error is only for III_alias reduce( ) function. A few errors are given below. Error : #29: expected an expression layer3.c line 934 return frac ? mad_f_mul(requantized, root_table[3 + frac]) : requantized; Error : #18: expected a ")" layer3.c line 1591 MAD_F_MLA(hi, lo, -b, ca[i]); Error : #18: expected a ")" layer3.c line 1596 MAD_F_MLA(hi, lo, a, ca[i]); Error : #29: expected an expression layer3.c line 1647 m0 = mad_f_mul(a17, -c3); The "asm.h" file I have included is as follows. # define MAD_F_SCALEBITS 28 # define MAD_F_FRACBITS 28 # define MAD_F(x) ((mad_fixed_t) (x##L)) # define MAD_F_MIN ((mad_fixed_t) -0x80000000L) # define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL) # define MAD_F_ONE MAD_F(0x10000000) # define mad_f_tofixed(x) ((mad_fixed_t) \ ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5)) # define mad_f_todouble(x) ((double) \ ((x) / (double) (1L << MAD_F_FRACBITS))) # define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS) # define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1)) /* (x should be positive) */ # define mad_f_fromint(x) ((x) << MAD_F_FRACBITS) # define mad_f_add(x, y) ((x) + (y)) # define mad_f_sub(x, y) ((x) - (y)) # define mad_f_mul(x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ mad_fixed_t __result; \ asm ("smull %0, %1, %3, %4\n\t" \ "movs %0, %0, lsr %5\n\t" \ "adc %2, %0, %1, lsl %6" \ : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ : "%r" (x), "r" (y), \ "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) # define MAD_F_MLX(hi, lo, x, y) \ asm ("smull %0, %1, %2, %3" \ : "=&r" (lo), "=&r" (hi) \ : "%r" (x), "r" (y)) # define MAD_F_MLA(hi, lo, x, y) \ asm ("smlal %0, %1, %2, %3" \ : "+r" (lo), "+r" (hi) \ : "%r" (x), "r" (y)) # define MAD_F_MLN(hi, lo) \ asm ("rsbs %0, %2, #0\n\t" \ "rsc %1, %3, #0" \ : "=r" (lo), "=r" (hi) \ : "0" (lo), "1" (hi) \ : "cc") # define mad_f_scale64(hi, lo) \ ({ mad_fixed_t __result; \ asm ("movs %0, %1, lsr %3\n\t" \ "adc %0, %0, %2, lsl %4" \ : "=&r" (__result) \ : "r" (lo), "r" (hi), \ "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) mad_fixed_t mad_f_abs(mad_fixed_t); mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t); Can anybodu help me? Thanks, Karthika Lakshmi. __________________________________________________________ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.com/

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mad-user April 2007