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avcodec/x86/h26x/h2656_inter: Don't prepare unused coeffs for hv funcs

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8 tap motion compensation functions with both vertical and horizontal
components are under severe register pressure, so that the filter
coefficients have to be put on the stack. Before this commit,
this meant that coefficients for use with pmaddubsw and pmaddwd
were always created. Yet this is completely unnecessary, as
every such register is only used for exactly one purpose and
it is known at compile time which one it is (only 8bit horizontal
filters are used with pmaddubsw), so only prepare that one.
This also allows to half the amount of stack used.

This saves 2432B of .text here.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2026-03-26 00:41:34 +01:00
parent 88870f33ab
commit a72b00675c
1 changed files with 17 additions and 27 deletions
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44
libavcodec/x86/h26x/h2656_inter.asm
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@@ -99,26 +99,16 @@ SECTION .text
VPBROADCASTW m13, [%2q + 1 * 2] ; coeff 2, 3
VPBROADCASTW m14, [%2q + 2 * 2] ; coeff 4, 5
VPBROADCASTW m15, [%2q + 3 * 2] ; coeff 6, 7
%if %0 == 3
MC_8TAP_SAVE_FILTER %3, m12, m13, m14, m15
%endif
%if %1 != 8
pmovsxbw m12, xm12
pmovsxbw m13, xm13
pmovsxbw m14, xm14
pmovsxbw m15, xm15
%if %0 == 3
MC_8TAP_SAVE_FILTER %3 + 4*mmsize, m12, m13, m14, m15
%endif
%elif %0 == 3
pmovsxbw m8, xm12
pmovsxbw m9, xm13
pmovsxbw m10, xm14
pmovsxbw m11, xm15
MC_8TAP_SAVE_FILTER %3 + 4*mmsize, m8, m9, m10, m11
%endif
%if %0 == 3
MC_8TAP_SAVE_FILTER %3, m12, m13, m14, m15
%endif
%endmacro
%macro MC_4TAP_LOAD 4
@@ -426,19 +416,19 @@ SECTION .text
paddw m4, m6
paddw m0, m4
%else
pmaddwd m0, [%3q+4*mmsize]
pmaddwd m2, [%3q+5*mmsize]
pmaddwd m4, [%3q+6*mmsize]
pmaddwd m6, [%3q+7*mmsize]
pmaddwd m0, [%3q+0*mmsize]
pmaddwd m2, [%3q+1*mmsize]
pmaddwd m4, [%3q+2*mmsize]
pmaddwd m6, [%3q+3*mmsize]
paddd m0, m2
paddd m4, m6
paddd m0, m4
psrad m0, %2-8
%if %1 > 4
pmaddwd m1, [%3q+4*mmsize]
pmaddwd m3, [%3q+5*mmsize]
pmaddwd m5, [%3q+6*mmsize]
pmaddwd m7, [%3q+7*mmsize]
pmaddwd m1, [%3q+0*mmsize]
pmaddwd m3, [%3q+1*mmsize]
pmaddwd m5, [%3q+2*mmsize]
pmaddwd m7, [%3q+3*mmsize]
paddd m1, m3
paddd m5, m7
paddd m1, m5
@@ -856,11 +846,11 @@ cglobal %1_put_uni_8tap_v%2_%3, 7, 9, 16, dst, dststride, src, srcstride, height
; int height, const int8_t *hf, const int8_t *vf, int width)
; ******************************
%macro PUT_8TAP_HV 3
cglobal %1_put_8tap_hv%2_%3, 7, 8, 16, 0 - mmsize*16, dst, dststride, src, srcstride, height, hf, vf, r3src
cglobal %1_put_8tap_hv%2_%3, 7, 8, 16, 0 - mmsize*8, dst, dststride, src, srcstride, height, hf, vf, r3src
MC_8TAP_FILTER %3, hf, 0
lea hfq, [rsp]
MC_8TAP_FILTER %3, vf, 8*mmsize
lea vfq, [rsp + 8*mmsize]
MC_8TAP_FILTER 14, vf, 4*mmsize
lea vfq, [rsp + 4*mmsize]
lea r3srcq, [srcstrideq*3]
sub srcq, r3srcq
@@ -931,11 +921,11 @@ cglobal %1_put_8tap_hv%2_%3, 7, 8, 16, 0 - mmsize*16, dst, dststride, src, srcst
RET
cglobal %1_put_uni_8tap_hv%2_%3, 7, 9, 16, 0 - 16*mmsize, dst, dststride, src, srcstride, height, hf, vf, r3src
cglobal %1_put_uni_8tap_hv%2_%3, 7, 9, 16, 0 - 8*mmsize, dst, dststride, src, srcstride, height, hf, vf, r3src
MC_8TAP_FILTER %3, hf, 0
lea hfq, [rsp]
MC_8TAP_FILTER %3, vf, 8*mmsize
lea vfq, [rsp + 8*mmsize]
MC_8TAP_FILTER 14, vf, 4*mmsize
lea vfq, [rsp + 4*mmsize]
lea r3srcq, [srcstrideq*3]
sub srcq, r3srcq
MC_8TAP_H_LOAD %3, srcq, %2, 15