On 2/14/2021 11:32 AM, Paul B Mahol wrote:
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
  libavfilter/x86/vf_gblur.asm    | 49 +++++++++++++++++++++++++++++++++
  libavfilter/x86/vf_gblur_init.c | 17 ++++++++++--
  2 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/libavfilter/x86/vf_gblur.asm b/libavfilter/x86/vf_gblur.asm
index a25b1659f5..8ccfbdc56b 100644
--- a/libavfilter/x86/vf_gblur.asm
+++ b/libavfilter/x86/vf_gblur.asm
@@ -183,3 +183,52 @@ HORIZ_SLICE
  INIT_XMM avx2
  HORIZ_SLICE
  %endif
+
+%macro POSTSCALE_SLICE 0
+%if UNIX64
+cglobal postscale_slice, 2, 3, 4, ptr, length, x

2, 2, 4, ptr, length

+%else
+cglobal postscale_slice, 5, 6, 4, ptr, length, postscale, min, max, x

5, 5, 4, ptr, length, postscale, min, max

+%endif
+    shl lengthd, 2

shl lengthd, 2
add ptrq, lengthq
neg lengthq

+%if WIN64
+    SWAP 0, 2
+    SWAP 1, 3
+    SWAP 2, 4
+%endif
+%if cpuflag(avx2)
+    vbroadcastss  m0, xm0
+    vbroadcastss  m1, xm1
+    vbroadcastss  m2, xm2
+%else
+    shufps   xm0, xm0, 0
+    shufps   xm1, xm1, 0
+    shufps   xm2, xm2, 0
+%endif
+    xor      xq, xq

remove this instruction.

+
+    .loop:
+%if cpuflag(avx2)
+    mulps         m3, m0, [ptrq + xq]

Replace xq with lengthq here and everywhere else.

+%else
+    movu          m3, [ptrq + xq]
+    mulps         m3, m0
+%endif
+    maxps         m3, m1
+    minps         m3, m2
+    movu   [ptrq+xq], m3
+
+    add xq, mmsize
+    cmp xd, lengthd

remove this cmp.

+    jl .loop
+
+    RET
+%endmacro
+
+INIT_XMM sse
+POSTSCALE_SLICE
+
+%if HAVE_AVX2_EXTERNAL
+INIT_YMM avx2
+POSTSCALE_SLICE
+%endif
diff --git a/libavfilter/x86/vf_gblur_init.c b/libavfilter/x86/vf_gblur_init.c
index e63e59fe23..9223cb797d 100644
--- a/libavfilter/x86/vf_gblur_init.c
+++ b/libavfilter/x86/vf_gblur_init.c
@@ -27,14 +27,25 @@
  void ff_horiz_slice_sse4(float *ptr, int width, int height, int steps, float 
nu, float bscale);
  void ff_horiz_slice_avx2(float *ptr, int width, int height, int steps, float 
nu, float bscale);
+void ff_postscale_slice_sse(float *ptr, int length, float postscale, float min, float max);
+void ff_postscale_slice_avx2(float *ptr, int length, float postscale, float 
min, float max);
+
  av_cold void ff_gblur_init_x86(GBlurContext *s)
  {
-#if ARCH_X86_64
      int cpu_flags = av_get_cpu_flags();
- if (EXTERNAL_SSE4(cpu_flags))
+    if (EXTERNAL_SSE(cpu_flags)) {
+        s->postscale_slice = ff_postscale_slice_sse;
+    }
+    if (EXTERNAL_AVX2(cpu_flags)) {

EXTERNAL_AVX2_FAST

+        s->postscale_slice = ff_postscale_slice_avx2;
+    }
+#if ARCH_X86_64
+    if (EXTERNAL_SSE4(cpu_flags)) {
          s->horiz_slice = ff_horiz_slice_sse4;
-    if (EXTERNAL_AVX2(cpu_flags))
+    }
+    if (EXTERNAL_AVX2(cpu_flags)) {
          s->horiz_slice = ff_horiz_slice_avx2;
+    }
  #endif
  }

LGTM with the above.
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