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lpc_mmx: merge some asm blocks

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These blocks depended on the compiler keeping xmm registers untouched between
them.

Originally committed as revision 25619 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla 2010-10-31 23:36:26 +00:00
parent 2839dc974d
commit e5d5407e26
1 changed files with 10 additions and 9 deletions
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19
libavcodec/x86/lpc_mmx.c
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@ -29,16 +29,15 @@ static void apply_welch_window_sse2(const int32_t *data, int len, double *w_data
x86_reg i = -n2*sizeof(int32_t);
x86_reg j = n2*sizeof(int32_t);
__asm__ volatile(
"movsd %0, %%xmm7 \n\t"
"movsd %4, %%xmm7 \n\t"
"movapd "MANGLE(ff_pd_1)", %%xmm6 \n\t"
"movapd "MANGLE(ff_pd_2)", %%xmm5 \n\t"
"movlhps %%xmm7, %%xmm7 \n\t"
"subpd %%xmm5, %%xmm7 \n\t"
"addsd %%xmm6, %%xmm7 \n\t"
::"m"(c)
);
"test $1, %5 \n\t"
"jz 2f \n\t"
#define WELCH(MOVPD, offset)\
__asm__ volatile(\
"1: \n\t"\
"movapd %%xmm7, %%xmm1 \n\t"\
"mulpd %%xmm1, %%xmm1 \n\t"\
@ -55,13 +54,15 @@ static void apply_welch_window_sse2(const int32_t *data, int len, double *w_data
"sub $8, %1 \n\t"\
"add $8, %0 \n\t"\
"jl 1b \n\t"\
:"+&r"(i), "+&r"(j)\
:"r"(w_data+n2), "r"(data+n2)\
);
if(len&1)
WELCH("movupd", -1)
else
"jmp 3f \n\t"
"2: \n\t"
WELCH("movapd", -2)
"3: \n\t"
:"+&r"(i), "+&r"(j)
:"r"(w_data+n2), "r"(data+n2), "m"(c), "r"(len)
);
#undef WELCH
}