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lavc/vp8dsp: save one R-V GPR

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This saves one instruction and frees up A5, which will be repurposed in
later changes. Unfortunately, we need to add quite a lot of alternative
code for this.
This commit is contained in:
Rémi Denis-Courmont
2024-05-25 16:43:17 +03:00
parent 4e56455d36
commit a11122f9c6
1 changed files with 16 additions and 7 deletions
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23
libavcodec/riscv/vp8dsp_rvv.S
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@@ -201,24 +201,33 @@ endconst
.macro epel_load dst len size type from_mem regtype .macro epel_load dst len size type from_mem regtype
.ifc \type,v .ifc \type,v
mv a5, a3 sub t6, a2, a3
add a7, a2, a3
.else .else
li a5, 1 addi t6, a2, -1
addi a7, a2, 1
.endif .endif
sub t6, a2, a5
add a7, a2, a5
.if \from_mem .if \from_mem
vle8.v v24, (a2) vle8.v v24, (a2)
vle8.v v22, (t6) vle8.v v22, (t6)
vle8.v v26, (a7) vle8.v v26, (a7)
add a7, a7, a5 .ifc \type,v
add a7, a7, a3
.else
addi a7, a7, 1
.endif
vle8.v v28, (a7) vle8.v v28, (a7)
vwmulu.vx v16, v24, \regtype\()2 vwmulu.vx v16, v24, \regtype\()2
vwmulu.vx v20, v26, \regtype\()3 vwmulu.vx v20, v26, \regtype\()3
.ifc \size,6 .ifc \size,6
sub t6, t6, a5 .ifc \type,v
add a7, a7, a5 sub t6, t6, a3
add a7, a7, a3
.else
addi t6, t6, -1
addi a7, a7, 1
.endif
vle8.v v24, (t6) vle8.v v24, (t6)
vle8.v v26, (a7) vle8.v v26, (a7)
vwmaccu.vx v16, \regtype\()0, v24 vwmaccu.vx v16, \regtype\()0, v24