avcodec/x86/dirac_dwt: Remove obsolete MMX functions

The only systems which benefit from these are truely
ancient 32bit x86s as all other systems use at least the SSE2 versions
(this includes all x64 cpus (which is why this code is restricted
to x86-32)).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/x86/dirac_dwt.asm

@@ -293,14 +293,6 @@ cglobal horizontal_compose_dd97i_ssse3, 3,6,8, b, tmp, w, x, w2, b_w2
     REP_RET
 
 
-%if ARCH_X86_64 == 0
-INIT_MMX
-COMPOSE_VERTICAL mmx
-HAAR_HORIZONTAL mmx, 0
-HAAR_HORIZONTAL mmx, 1
-%endif
-
-;;INIT_XMM
 INIT_XMM
 COMPOSE_VERTICAL sse2
 HAAR_HORIZONTAL sse2, 0

libavcodec/x86/dirac_dwt_init.c

@@ -134,9 +134,6 @@ static void horizontal_compose_haar1i##ext(uint8_t *_b, uint8_t *_tmp, int w)\
 \
 
 #if HAVE_X86ASM
-#if !ARCH_X86_64
-COMPOSE_VERTICAL(_mmx, 4)
-#endif
 COMPOSE_VERTICAL(_sse2, 8)
 
 
@@ -163,34 +160,6 @@ void ff_spatial_idwt_init_x86(DWTContext *d, enum dwt_type type)
 #if HAVE_X86ASM
   int mm_flags = av_get_cpu_flags();
 
-#if !ARCH_X86_64
-    if (!(mm_flags & AV_CPU_FLAG_MMX))
-        return;
-
-    switch (type) {
-    case DWT_DIRAC_DD9_7:
-        d->vertical_compose_l0 = (void*)vertical_compose53iL0_mmx;
-        d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0_mmx;
-        break;
-    case DWT_DIRAC_LEGALL5_3:
-        d->vertical_compose_l0 = (void*)vertical_compose53iL0_mmx;
-        d->vertical_compose_h0 = (void*)vertical_compose_dirac53iH0_mmx;
-        break;
-    case DWT_DIRAC_DD13_7:
-        d->vertical_compose_l0 = (void*)vertical_compose_dd137iL0_mmx;
-        d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0_mmx;
-        break;
-    case DWT_DIRAC_HAAR0:
-        d->vertical_compose   = (void*)vertical_compose_haar_mmx;
-        d->horizontal_compose = horizontal_compose_haar0i_mmx;
-        break;
-    case DWT_DIRAC_HAAR1:
-        d->vertical_compose   = (void*)vertical_compose_haar_mmx;
-        d->horizontal_compose = horizontal_compose_haar1i_mmx;
-        break;
-    }
-#endif
-
     if (!(mm_flags & AV_CPU_FLAG_SSE2))
         return;