diff --git a/libavcodec/x86/mathops.h b/libavcodec/x86/mathops.h
index 1f049c0df9..1cca05d658 100644
--- a/libavcodec/x86/mathops.h
+++ b/libavcodec/x86/mathops.h
@@ -24,6 +24,7 @@
 
 #include "config.h"
 #include "libavutil/common.h"
+#include "libavutil/x86/asm.h"
 
 #if HAVE_INLINE_ASM
 
@@ -88,6 +89,7 @@ static inline av_const int mid_pred(int a, int b, int c)
     return i;
 }
 
+#if HAVE_6REGS
 #define COPY3_IF_LT(x, y, a, b, c, d)\
 __asm__ volatile(\
     "cmpl  %0, %3       \n\t"\
@@ -97,6 +99,7 @@ __asm__ volatile(\
     : "+&r" (x), "+&r" (a), "+r" (c)\
     : "r" (y), "r" (b), "r" (d)\
 );
+#endif /* HAVE_6REGS */
 #endif /* HAVE_I686 */
 
 #define MASK_ABS(mask, level)                   \
diff --git a/libavcodec/x86/mpegaudiodsp.c b/libavcodec/x86/mpegaudiodsp.c
index 5dc7bc6362..2edf157d6f 100644
--- a/libavcodec/x86/mpegaudiodsp.c
+++ b/libavcodec/x86/mpegaudiodsp.c
@@ -45,7 +45,7 @@ void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win,
 
 DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40];
 
-#if HAVE_SSE2_INLINE
+#if HAVE_6REGS && HAVE_SSE2_INLINE
 
 #define MACS(rt, ra, rb) rt+=(ra)*(rb)
 #define MLSS(rt, ra, rb) rt-=(ra)*(rb)
@@ -189,7 +189,7 @@ static void apply_window_mp3(float *in, float *win, int *unused, float *out,
     *out = sum;
 }
 
-#endif /* HAVE_SSE2_INLINE */
+#endif /* HAVE_6REGS && HAVE_SSE2_INLINE */
 
 #if HAVE_YASM
 #define DECL_IMDCT_BLOCKS(CPU1, CPU2)                                       \
@@ -255,7 +255,7 @@ av_cold void ff_mpadsp_init_x86(MPADSPContext *s)
         }
     }
 
-#if HAVE_SSE2_INLINE
+#if HAVE_6REGS && HAVE_SSE2_INLINE
     if (INLINE_SSE2(cpu_flags)) {
         s->apply_window_float = apply_window_mp3;
     }
diff --git a/libavcodec/x86/mpegvideoenc.c b/libavcodec/x86/mpegvideoenc.c
index e24e5a6e93..f14a268ce0 100644
--- a/libavcodec/x86/mpegvideoenc.c
+++ b/libavcodec/x86/mpegvideoenc.c
@@ -30,6 +30,8 @@
 /* not permutated inverse zigzag_direct + 1 for MMX quantizer */
 DECLARE_ALIGNED(16, static uint16_t, inv_zigzag_direct16)[64];
 
+#if HAVE_6REGS
+
 #if HAVE_MMX_INLINE
 #define COMPILE_TEMPLATE_MMXEXT 0
 #define COMPILE_TEMPLATE_SSE2   0
@@ -81,6 +83,8 @@ DECLARE_ALIGNED(16, static uint16_t, inv_zigzag_direct16)[64];
 #include "mpegvideoenc_template.c"
 #endif /* HAVE_SSSE3_INLINE */
 
+#endif /* HAVE_6REGS */
+
 #if HAVE_INLINE_ASM
 static void  denoise_dct_mmx(MpegEncContext *s, int16_t *block){
     const int intra= s->mb_intra;
@@ -205,21 +209,25 @@ av_cold void ff_dct_encode_init_x86(MpegEncContext *s)
 #if HAVE_MMX_INLINE
         int cpu_flags = av_get_cpu_flags();
         if (INLINE_MMX(cpu_flags)) {
+#if HAVE_6REGS
             s->dct_quantize = dct_quantize_MMX;
+#endif
             s->denoise_dct  = denoise_dct_mmx;
         }
 #endif
-#if HAVE_MMXEXT_INLINE
+#if HAVE_6REGS && HAVE_MMXEXT_INLINE
         if (INLINE_MMXEXT(cpu_flags))
             s->dct_quantize = dct_quantize_MMXEXT;
 #endif
 #if HAVE_SSE2_INLINE
         if (INLINE_SSE2(cpu_flags)) {
+#if HAVE_6REGS
             s->dct_quantize = dct_quantize_SSE2;
+#endif
             s->denoise_dct  = denoise_dct_sse2;
         }
 #endif
-#if HAVE_SSSE3_INLINE
+#if HAVE_6REGS && HAVE_SSSE3_INLINE
         if (INLINE_SSSE3(cpu_flags))
             s->dct_quantize = dct_quantize_SSSE3;
 #endif
diff --git a/libavcodec/x86/snowdsp.c b/libavcodec/x86/snowdsp.c
index 711af5fd54..67cb868ada 100644
--- a/libavcodec/x86/snowdsp.c
+++ b/libavcodec/x86/snowdsp.c
@@ -606,6 +606,7 @@ static void ff_snow_vertical_compose97i_mmx(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM
 }
 #endif //HAVE_7REGS
 
+#if HAVE_6REGS
 #define snow_inner_add_yblock_sse2_header \
     IDWTELEM * * dst_array = sb->line + src_y;\
     x86_reg tmp;\
@@ -873,6 +874,7 @@ static void ff_snow_inner_add_yblock_mmx(const uint8_t *obmc, const int obmc_str
     else
         ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
 }
+#endif /* HAVE_6REGS */
 
 #endif /* HAVE_INLINE_ASM */
 
@@ -887,7 +889,9 @@ void ff_dwt_init_x86(SnowDWTContext *c)
 #if HAVE_7REGS
             c->vertical_compose97i = ff_snow_vertical_compose97i_sse2;
 #endif
+#if HAVE_6REGS
             c->inner_add_yblock = ff_snow_inner_add_yblock_sse2;
+#endif
         }
         else{
             if (mm_flags & AV_CPU_FLAG_MMXEXT) {
@@ -896,7 +900,9 @@ void ff_dwt_init_x86(SnowDWTContext *c)
             c->vertical_compose97i = ff_snow_vertical_compose97i_mmx;
 #endif
             }
+#if HAVE_6REGS
             c->inner_add_yblock = ff_snow_inner_add_yblock_mmx;
+#endif
         }
     }
 #endif /* HAVE_INLINE_ASM */
diff --git a/libavcodec/x86/vc1dsp_init.c b/libavcodec/x86/vc1dsp_init.c
index aff4b264e3..9256be3816 100644
--- a/libavcodec/x86/vc1dsp_init.c
+++ b/libavcodec/x86/vc1dsp_init.c
@@ -27,6 +27,7 @@
 #include "libavutil/attributes.h"
 #include "libavutil/cpu.h"
 #include "libavutil/x86/cpu.h"
+#include "libavutil/x86/asm.h"
 #include "libavcodec/vc1dsp.h"
 #include "fpel.h"
 #include "vc1dsp.h"
@@ -86,10 +87,10 @@ av_cold void ff_vc1dsp_init_x86(VC1DSPContext *dsp)
 {
     int cpu_flags = av_get_cpu_flags();
 
-    if (INLINE_MMX(cpu_flags))
+    if (HAVE_6REGS && INLINE_MMX(cpu_flags))
         ff_vc1dsp_init_mmx(dsp);
 
-    if (INLINE_MMXEXT(cpu_flags))
+    if (HAVE_6REGS && INLINE_MMXEXT(cpu_flags))
         ff_vc1dsp_init_mmxext(dsp);
 
 #define ASSIGN_LF(EXT) \
diff --git a/libavcodec/x86/vc1dsp_mmx.c b/libavcodec/x86/vc1dsp_mmx.c
index 5b71de367b..c06cb14496 100644
--- a/libavcodec/x86/vc1dsp_mmx.c
+++ b/libavcodec/x86/vc1dsp_mmx.c
@@ -33,7 +33,7 @@
 #include "fpel.h"
 #include "vc1dsp.h"
 
-#if HAVE_INLINE_ASM
+#if HAVE_6REGS && HAVE_INLINE_ASM
 
 #define OP_PUT(S,D)
 #define OP_AVG(S,D) "pavgb " #S ", " #D " \n\t"
@@ -760,4 +760,4 @@ av_cold void ff_vc1dsp_init_mmxext(VC1DSPContext *dsp)
     dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_mmxext;
     dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_mmxext;
 }
-#endif /* HAVE_INLINE_ASM */
+#endif /* HAVE_6REGS && HAVE_INLINE_ASM */
diff --git a/libavcodec/x86/vp3dsp_init.c b/libavcodec/x86/vp3dsp_init.c
index 709e49add3..cc3eba4e9a 100644
--- a/libavcodec/x86/vp3dsp_init.c
+++ b/libavcodec/x86/vp3dsp_init.c
@@ -63,6 +63,7 @@ void ff_vp3_h_loop_filter_mmxext(uint8_t *src, int stride,
     "paddb "#regb", "#regr"             \n\t"                    \
     "paddb "#regd", "#regp"             \n\t"
 
+#if HAVE_6REGS
 static void put_vp_no_rnd_pixels8_l2_mmx(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
 {
 //    START_TIMER
@@ -94,15 +95,16 @@ static void put_vp_no_rnd_pixels8_l2_mmx(uint8_t *dst, const uint8_t *a, const u
         :"memory");
 //    STOP_TIMER("put_vp_no_rnd_pixels8_l2_mmx")
 }
+#endif /*HAVE_6REGS */
 #endif /* HAVE_MMX_INLINE */
 
 av_cold void ff_vp3dsp_init_x86(VP3DSPContext *c, int flags)
 {
     int cpu_flags = av_get_cpu_flags();
 
-#if HAVE_MMX_INLINE
+#if HAVE_6REGS && HAVE_MMX_INLINE
     c->put_no_rnd_pixels_l2 = put_vp_no_rnd_pixels8_l2_mmx;
-#endif /* HAVE_MMX_INLINE */
+#endif /* HAVE_6REGS && HAVE_MMX_INLINE */
 
 #if ARCH_X86_32
     if (EXTERNAL_MMX(cpu_flags)) {
diff --git a/libavcodec/x86/vp56_arith.h b/libavcodec/x86/vp56_arith.h
index e560cd4da1..810cc8dcd8 100644
--- a/libavcodec/x86/vp56_arith.h
+++ b/libavcodec/x86/vp56_arith.h
@@ -24,7 +24,7 @@
 #ifndef AVCODEC_X86_VP56_ARITH_H
 #define AVCODEC_X86_VP56_ARITH_H
 
-#if HAVE_INLINE_ASM && HAVE_FAST_CMOV
+#if HAVE_INLINE_ASM && HAVE_FAST_CMOV && HAVE_6REGS
 #define vp56_rac_get_prob vp56_rac_get_prob
 static av_always_inline int vp56_rac_get_prob(VP56RangeCoder *c, uint8_t prob)
 {
diff --git a/libavfilter/vf_noise.c b/libavfilter/vf_noise.c
index c29afa2721..07d1c276c3 100644
--- a/libavfilter/vf_noise.c
+++ b/libavfilter/vf_noise.c
@@ -289,7 +289,7 @@ static inline void line_noise_avg_c(uint8_t *dst, const uint8_t *src,
 static inline void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src,
                                       int len, int8_t **shift)
 {
-#if HAVE_MMX_INLINE
+#if HAVE_MMX_INLINE && HAVE_6REGS
     x86_reg mmx_len= len&(~7);
 
     __asm__ volatile(
@@ -438,7 +438,9 @@ static av_cold int init(AVFilterContext *ctx)
     if (HAVE_MMX_INLINE &&
         cpu_flags & AV_CPU_FLAG_MMX) {
         n->line_noise = line_noise_mmx;
+#if HAVE_6REGS
         n->line_noise_avg = line_noise_avg_mmx;
+#endif
     }
     if (HAVE_MMXEXT_INLINE &&
         cpu_flags & AV_CPU_FLAG_MMXEXT)
diff --git a/libswscale/x86/swscale_template.c b/libswscale/x86/swscale_template.c
index a2f0d6e7d8..1213197347 100644
--- a/libswscale/x86/swscale_template.c
+++ b/libswscale/x86/swscale_template.c
@@ -666,6 +666,7 @@ static void RENAME(yuv2rgb555_X)(SwsContext *c, const int16_t *lumFilter,
 #define WRITEBGR24(dst, dstw, index)  WRITEBGR24MMX(dst, dstw, index)
 #endif
 
+#if HAVE_6REGS
 static void RENAME(yuv2bgr24_X_ar)(SwsContext *c, const int16_t *lumFilter,
                                    const int16_t **lumSrc, int lumFilterSize,
                                    const int16_t *chrFilter, const int16_t **chrUSrc,
@@ -715,6 +716,7 @@ static void RENAME(yuv2bgr24_X)(SwsContext *c, const int16_t *lumFilter,
     : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S
     );
 }
+#endif /* HAVE_6REGS */
 
 #define REAL_WRITEYUY2(dst, dstw, index) \
     "packuswb  %%mm3, %%mm3     \n\t"\
@@ -1664,7 +1666,9 @@ static av_cold void RENAME(sws_init_swscale)(SwsContext *c)
                 if (!(c->flags & SWS_FULL_CHR_H_INT)) {
                     switch (c->dstFormat) {
                     case AV_PIX_FMT_RGB32:   c->yuv2packedX = RENAME(yuv2rgb32_X_ar);   break;
+#if HAVE_6REGS
                     case AV_PIX_FMT_BGR24:   c->yuv2packedX = RENAME(yuv2bgr24_X_ar);   break;
+#endif
                     case AV_PIX_FMT_RGB555:  c->yuv2packedX = RENAME(yuv2rgb555_X_ar);  break;
                     case AV_PIX_FMT_RGB565:  c->yuv2packedX = RENAME(yuv2rgb565_X_ar);  break;
                     case AV_PIX_FMT_YUYV422: c->yuv2packedX = RENAME(yuv2yuyv422_X_ar); break;
@@ -1677,7 +1681,9 @@ static av_cold void RENAME(sws_init_swscale)(SwsContext *c)
                 if (!(c->flags & SWS_FULL_CHR_H_INT)) {
                     switch (c->dstFormat) {
                     case AV_PIX_FMT_RGB32:   c->yuv2packedX = RENAME(yuv2rgb32_X);   break;
+#if HAVE_6REGS
                     case AV_PIX_FMT_BGR24:   c->yuv2packedX = RENAME(yuv2bgr24_X);   break;
+#endif
                     case AV_PIX_FMT_RGB555:  c->yuv2packedX = RENAME(yuv2rgb555_X);  break;
                     case AV_PIX_FMT_RGB565:  c->yuv2packedX = RENAME(yuv2rgb565_X);  break;
                     case AV_PIX_FMT_YUYV422: c->yuv2packedX = RENAME(yuv2yuyv422_X); break;
diff --git a/libswscale/x86/yuv2rgb.c b/libswscale/x86/yuv2rgb.c
index a3370eec61..5e2f77c20f 100644
--- a/libswscale/x86/yuv2rgb.c
+++ b/libswscale/x86/yuv2rgb.c
@@ -50,28 +50,28 @@ DECLARE_ASM_CONST(8, uint64_t, pb_03) = 0x0303030303030303ULL;
 DECLARE_ASM_CONST(8, uint64_t, pb_07) = 0x0707070707070707ULL;
 
 //MMX versions
-#if HAVE_MMX_INLINE
+#if HAVE_MMX_INLINE && HAVE_6REGS
 #undef RENAME
 #undef COMPILE_TEMPLATE_MMXEXT
 #define COMPILE_TEMPLATE_MMXEXT 0
 #define RENAME(a) a ## _mmx
 #include "yuv2rgb_template.c"
-#endif /* HAVE_MMX_INLINE */
+#endif /* HAVE_MMX_INLINE && HAVE_6REGS */
 
 // MMXEXT versions
-#if HAVE_MMXEXT_INLINE
+#if HAVE_MMXEXT_INLINE && HAVE_6REGS
 #undef RENAME
 #undef COMPILE_TEMPLATE_MMXEXT
 #define COMPILE_TEMPLATE_MMXEXT 1
 #define RENAME(a) a ## _mmxext
 #include "yuv2rgb_template.c"
-#endif /* HAVE_MMXEXT_INLINE */
+#endif /* HAVE_MMXEXT_INLINE && HAVE_6REGS */
 
 #endif /* HAVE_INLINE_ASM */
 
 av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
 {
-#if HAVE_MMX_INLINE
+#if HAVE_MMX_INLINE && HAVE_6REGS
     int cpu_flags = av_get_cpu_flags();
 
 #if HAVE_MMXEXT_INLINE
@@ -113,7 +113,7 @@ av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
                 return yuv420_rgb15_mmx;
         }
     }
-#endif /* HAVE_MMX_INLINE */
+#endif /* HAVE_MMX_INLINE  && HAVE_6REGS */
 
     return NULL;
 }