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avcodec/x86/vvc/alf: Simplify vb_pos comparisons

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The value of vb_pos at vb_bottom, vb_above is known
at compile-time, so one can avoid the modifications
to vb_pos and just compare against immediates.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2026-03-03 02:42:58 +01:00
parent 1960320112
commit 0ddece40c5
1 changed files with 27 additions and 33 deletions
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60
libavcodec/x86/vvc/alf.asm
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@@ -192,64 +192,58 @@ SECTION .text
je %%vb_bottom
cmp vb_posd, 4
jne %%vb_end
%else
cmp vb_posd, 2
jne %%vb_end
cmp %1, 2
jge %%vb_bottom
%endif
%%vb_above:
; above
; above: vb_pos == 4
; p1 = (y + i == vb_pos - 1) ? p0 : p1;
; p2 = (y + i == vb_pos - 1) ? p0 : p2;
; p3 = (y + i >= vb_pos - 2) ? p1 : p3;
; p4 = (y + i >= vb_pos - 2) ? p2 : p4;
; p5 = (y + i >= vb_pos - 3) ? p3 : p5;
; p6 = (y + i >= vb_pos - 3) ? p4 : p6;
dec vb_posd
cmp vb_posd, %1
cmp %1, 3
cmove s1q, srcq
cmove s2q, srcq
dec vb_posd
cmp vb_posd, %1
cmovbe s3q, s1q
cmovbe s4q, s2q
cmp %1, 1
cmova s3q, s1q
cmova s4q, s2q
dec vb_posd
%if LUMA
cmp vb_posd, %1
cmovbe s5q, s3q
cmovbe s6q, s4q
%endif
add vb_posd, 3
cmovae s5q, s3q
cmovae s6q, s4q
jmp %%vb_end
%%vb_bottom:
; bottom
; bottom: vb_pos == 0
; p1 = (y + i == vb_pos ) ? p0 : p1;
; p2 = (y + i == vb_pos ) ? p0 : p2;
; p3 = (y + i <= vb_pos + 1) ? p1 : p3;
; p4 = (y + i <= vb_pos + 1) ? p2 : p4;
; p5 = (y + i <= vb_pos + 2) ? p3 : p5;
; p6 = (y + i <= vb_pos + 2) ? p4 : p6;
cmp vb_posd, %1
cmp %1, 0
cmove s1q, srcq
cmove s2q, srcq
inc vb_posd
cmp vb_posd, %1
cmovae s3q, s1q
cmovae s4q, s2q
cmp %1, 2
cmovb s3q, s1q
cmovb s4q, s2q
inc vb_posd
%if LUMA
cmp vb_posd, %1
cmovae s5q, s3q
cmovae s6q, s4q
cmovbe s5q, s3q
cmovbe s6q, s4q
%else ; chroma
cmp vb_posd, 2
jne %%vb_end
cmp %1, 2
jge %%vb_bottom
%%vb_above:
cmp %1, 1
%%vb_bottom:
cmove s1q, srcq
cmove s2q, srcq
mov s3q, s1q
mov s4q, s2q
%endif
sub vb_posd, 2
%%vb_end:
%endmacro