diff --git a/configure b/configure
index 3318cf4fef..03d21562fa 100755
--- a/configure
+++ b/configure
@@ -3414,6 +3414,14 @@ elif enabled mips; then
     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
 
+elif enabled parisc; then
+
+    if enabled gcc; then
+        case $($cc -dumpversion) in
+            4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
+        esac
+    fi
+
 elif enabled ppc; then
 
     enable local_aligned_8 local_aligned_16
diff --git a/libavresample/utils.c b/libavresample/utils.c
index 2a0aacd4c0..ad49e880af 100644
--- a/libavresample/utils.c
+++ b/libavresample/utils.c
@@ -254,7 +254,7 @@ int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
     AudioData input_buffer;
     AudioData output_buffer;
     AudioData *current_buffer;
-    int ret;
+    int ret, direct_output;
 
     /* reset internal buffers */
     if (avr->in_buffer) {
@@ -276,6 +276,7 @@ int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
     av_dlog(avr, "[start conversion]\n");
 
     /* initialize output_buffer with output data */
+    direct_output = output && av_audio_fifo_size(avr->out_fifo) == 0;
     if (output) {
         ret = ff_audio_data_init(&output_buffer, output, out_plane_size,
                                  avr->out_channels, out_samples,
@@ -295,7 +296,7 @@ int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
         current_buffer = &input_buffer;
 
         if (avr->upmix_needed && !avr->in_convert_needed && !avr->resample_needed &&
-            !avr->out_convert_needed && output && out_samples >= in_samples) {
+            !avr->out_convert_needed && direct_output && out_samples >= in_samples) {
             /* in some rare cases we can copy input to output and upmix
                directly in the output buffer */
             av_dlog(avr, "[copy] %s to output\n", current_buffer->name);
@@ -343,7 +344,7 @@ int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
         AudioData *resample_out;
         int consumed = 0;
 
-        if (!avr->out_convert_needed && output && out_samples > 0)
+        if (!avr->out_convert_needed && direct_output && out_samples > 0)
             resample_out = &output_buffer;
         else
             resample_out = avr->resample_out_buffer;
@@ -377,7 +378,7 @@ int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
     }
 
     if (avr->out_convert_needed) {
-        if (output && out_samples >= current_buffer->nb_samples) {
+        if (direct_output && out_samples >= current_buffer->nb_samples) {
             /* convert directly to output */
             av_dlog(avr, "[convert] %s to output\n", current_buffer->name);
             ret = ff_audio_convert(avr->ac_out, &output_buffer, current_buffer,
diff --git a/libavresample/x86/audio_mix.asm b/libavresample/x86/audio_mix.asm
index 7f3b5b9080..a3f1af5787 100644
--- a/libavresample/x86/audio_mix.asm
+++ b/libavresample/x86/audio_mix.asm
@@ -278,7 +278,15 @@ cglobal mix_%1_to_%2_%3_flt, 3,in_channels+2,needed_mmregs+matrix_elements_mm, s
     and           rsp, ~(mmsize-1)
     sub           rsp, matrix_elements_stack * mmsize
     %else
-    %assign pad matrix_elements_stack * mmsize + (mmsize - gprsize) - (stack_offset & (mmsize - gprsize))
+    %assign matrix_stack_size matrix_elements_stack * mmsize
+    %assign pad matrix_stack_size + (mmsize - gprsize) - (stack_offset & (mmsize - gprsize))
+    ; on x86-32 for 7 and 8 channels we need more stack space for src pointers
+    %if ARCH_X86_32 && in_channels >= 7
+    %assign pad pad + 0x10
+    %define src5m [rsp+matrix_stack_size+0]
+    %define src6m [rsp+matrix_stack_size+4]
+    %define src7m [rsp+matrix_stack_size+8]
+    %endif
     SUB           rsp, pad
     %endif
 %endif