x86/swr: disable pack_8ch functions on msvc/icl x86_32

Until a proper fix is committed.
Signed-off-by: James Almer <jamrial@gmail.com>

libswresample/x86/audio_convert.asm

@@ -583,6 +583,7 @@ PACK_6CH float, int32, a, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_6CH int32, float, u, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 PACK_6CH int32, float, a, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 
+%if HAVE_ALIGNED_STACK
 PACK_8CH float, float, u, 2, 2, NOP_N, NOP_N
 PACK_8CH float, float, a, 2, 2, NOP_N, NOP_N
 
@@ -590,6 +591,7 @@ PACK_8CH float, int32, u, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_8CH float, int32, a, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_8CH int32, float, u, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 PACK_8CH int32, float, a, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
+%endif
 
 INIT_XMM ssse3
 UNPACK_2CH int16, int16, u, 1, 1, NOP_N, NOP_N
@@ -609,6 +611,7 @@ PACK_6CH float, int32, a, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_6CH int32, float, u, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 PACK_6CH int32, float, a, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 
+%if HAVE_ALIGNED_STACK
 PACK_8CH float, float, u, 2, 2, NOP_N, NOP_N
 PACK_8CH float, float, a, 2, 2, NOP_N, NOP_N
 
@@ -616,6 +619,7 @@ PACK_8CH float, int32, u, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_8CH float, int32, a, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT
 PACK_8CH int32, float, u, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
 PACK_8CH int32, float, a, 2, 2, FLOAT_TO_INT32_N, FLOAT_TO_INT32_INIT
+%endif
 
 INIT_YMM avx
 CONV float, int32, u, 2, 2, INT32_TO_FLOAT_N, INT32_TO_FLOAT_INIT

libswresample/x86/audio_convert_init.c

@@ -117,7 +117,7 @@ MULTI_CAPS_FUNC(SSE2, sse2)
             if(   out_fmt == AV_SAMPLE_FMT_S32  && in_fmt == AV_SAMPLE_FMT_FLTP)
                 ac->simd_f =  ff_pack_6ch_float_to_int32_a_sse2;
         }
-        if(channels == 8) {
+        if(HAVE_ALIGNED_STACK && channels == 8) {
             if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_FLTP || out_fmt == AV_SAMPLE_FMT_S32 && in_fmt == AV_SAMPLE_FMT_S32P)
                 ac->simd_f =  ff_pack_8ch_float_to_float_a_sse2;
             if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_S32P)
@@ -147,7 +147,7 @@ MULTI_CAPS_FUNC(SSE2, sse2)
             if(   out_fmt == AV_SAMPLE_FMT_S32  && in_fmt == AV_SAMPLE_FMT_FLTP)
                 ac->simd_f =  ff_pack_6ch_float_to_int32_a_avx;
         }
-        if(channels == 8) {
+        if(HAVE_ALIGNED_STACK && channels == 8) {
             if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_FLTP || out_fmt == AV_SAMPLE_FMT_S32 && in_fmt == AV_SAMPLE_FMT_S32P)
                 ac->simd_f =  ff_pack_8ch_float_to_float_a_avx;
             if(   out_fmt == AV_SAMPLE_FMT_FLT  && in_fmt == AV_SAMPLE_FMT_S32P)