x86/vf_threshold: make threshold8 functions work on x86_32

Signed-off-by: James Almer <jamrial@gmail.com>

libavfilter/x86/vf_threshold.asm

@@ -22,8 +22,6 @@
 
 %include "libavutil/x86/x86util.asm"
 
-%if ARCH_X86_64
-
 SECTION_RODATA
 
 pb_128: times 16 db 128
@@ -31,9 +29,20 @@ pb_128: times 16 db 128
 SECTION .text
 
 %macro THRESHOLD_8 0
+%if ARCH_X86_64
 cglobal threshold8, 10, 13, 5, in, threshold, min, max, out, ilinesize, tlinesize, flinesize, slinesize, olinesize, w, h, x
     mov             wd, dword wm
     mov             hd, dword hm
+%else
+cglobal threshold8, 5, 7, 5, in, threshold, min, max, out, w, x
+    mov             wd, r10m
+%define     ilinesizeq  r5mp
+%define     tlinesizeq  r6mp
+%define     flinesizeq  r7mp
+%define     slinesizeq  r8mp
+%define     olinesizeq  r9mp
+%define             hd  r11mp
+%endif
     VBROADCASTI128  m4, [pb_128]
     add            inq, wq
     add     thresholdq, wq
@@ -74,5 +83,3 @@ THRESHOLD_8
 INIT_YMM avx2
 THRESHOLD_8
 %endif
-
-%endif

libavfilter/x86/vf_threshold_init.c

@@ -42,7 +42,6 @@ av_cold void ff_threshold_init_x86(ThresholdContext *s)
 {
     int cpu_flags = av_get_cpu_flags();
 
-    if (ARCH_X86_64) {
     if (s->depth == 8) {
         if (EXTERNAL_SSE4(cpu_flags)) {
             s->threshold = ff_threshold8_sse4;
@@ -51,5 +50,4 @@ av_cold void ff_threshold_init_x86(ThresholdContext *s)
             s->threshold = ff_threshold8_avx2;
         }
     }
-    }
 }