diff --git a/libswscale/riscv/input_rvv.S b/libswscale/riscv/input_rvv.S
index d07db43b55..759f157713 100644
--- a/libswscale/riscv/input_rvv.S
+++ b/libswscale/riscv/input_rvv.S
@@ -21,12 +21,14 @@
 #include "libavutil/riscv/asm.S"
 
 func ff_bgr24ToY_rvv, zve32x
+        lpad    0
         lw      t1, 8(a5) # BY
         lw      t3, 0(a5) # RY
         j       1f
 endfunc
 
 func ff_rgb24ToY_rvv, zve32x, zba
+        lpad    0
         lw      t1, 0(a5) # RY
         lw      t3, 8(a5) # BY
 1:
@@ -55,6 +57,7 @@ func ff_rgb24ToY_rvv, zve32x, zba
 endfunc
 
 func ff_bgr24ToUV_rvv, zve32x
+        lpad    0
         lw      t1, 20(a6) # BU
         lw      t4, 32(a6) # BV
         lw      t3, 12(a6) # RU
@@ -63,6 +66,7 @@ func ff_bgr24ToUV_rvv, zve32x
 endfunc
 
 func ff_rgb24ToUV_rvv, zve32x, zba
+        lpad    0
         lw      t1, 12(a6) # RU
         lw      t4, 24(a6) # RV
         lw      t3, 20(a6) # BU
@@ -101,6 +105,7 @@ func ff_rgb24ToUV_rvv, zve32x, zba
 endfunc
 
 func ff_bgr24ToUV_half_rvv, zve32x
+        lpad    0
         lw      t1, 20(a6) # BU
         lw      t4, 32(a6) # BV
         lw      t3, 12(a6) # RU
@@ -109,6 +114,7 @@ func ff_bgr24ToUV_half_rvv, zve32x
 endfunc
 
 func ff_rgb24ToUV_half_rvv, zve32x, zba
+        lpad    0
         lw      t1, 12(a6) # RU
         lw      t4, 24(a6) # RV
         lw      t3, 20(a6) # BU
@@ -152,12 +158,14 @@ endfunc
 
         .macro  rgba_input chr0, chr1, high
 func ff_\chr1\()ToY_rvv, zve32x
+        lpad    0
         lw      t1, 8(a5) # BY
         lw      t3, 0(a5) # RY
         j       1f
 endfunc
 
 func ff_\chr0\()ToY_rvv, zve32x, zba
+        lpad    0
         lw      t1, 0(a5) # RY
         lw      t3, 8(a5) # BY
 1:
@@ -192,6 +200,7 @@ func ff_\chr0\()ToY_rvv, zve32x, zba
 endfunc
 
 func ff_\chr1\()ToUV_rvv, zve32x
+        lpad    0
         lw      t1, 20(a6) # BU
         lw      t4, 32(a6) # BV
         lw      t3, 12(a6) # RU
@@ -200,6 +209,7 @@ func ff_\chr1\()ToUV_rvv, zve32x
 endfunc
 
 func ff_\chr0\()ToUV_rvv, zve32x, zba
+        lpad    0
         lw      t1, 12(a6) # RU
         lw      t4, 24(a6) # RV
         lw      t3, 20(a6) # BU
@@ -244,6 +254,7 @@ func ff_\chr0\()ToUV_rvv, zve32x, zba
 endfunc
 
 func ff_\chr1\()ToUV_half_rvv, zve32x
+        lpad    0
         lw      t1, 20(a6) # BU
         lw      t4, 32(a6) # BV
         lw      t3, 12(a6) # RU
@@ -252,6 +263,7 @@ func ff_\chr1\()ToUV_half_rvv, zve32x
 endfunc
 
 func ff_\chr0\()ToUV_half_rvv, zve32x, zba
+        lpad    0
         lw      t1, 12(a6) # RU
         lw      t4, 24(a6) # RV
         lw      t3, 20(a6) # BU
diff --git a/libswscale/riscv/range_rvv.S b/libswscale/riscv/range_rvv.S
index 19a74eba79..24005170af 100644
--- a/libswscale/riscv/range_rvv.S
+++ b/libswscale/riscv/range_rvv.S
@@ -21,6 +21,7 @@
 #include "libavutil/riscv/asm.S"
 
 func ff_range_lum_to_jpeg_16_rvv, zve32x, zba
+        lpad    0
         li       t1, 30189
         li       t2, 19077
         li       t3, -39057361
@@ -42,6 +43,7 @@ func ff_range_lum_to_jpeg_16_rvv, zve32x, zba
 endfunc
 
 func ff_range_lum_from_jpeg_16_rvv, zve32x, zba
+        lpad    0
         li       t1, 14071
         li       t2, 33561947
 1:
@@ -61,6 +63,7 @@ func ff_range_lum_from_jpeg_16_rvv, zve32x, zba
 endfunc
 
 func ff_range_chr_to_jpeg_16_rvv, zve32x, zba
+        lpad    0
         li      t1, 30775
         li      t2, 4663
         li      t3, -9289992
@@ -89,6 +92,7 @@ func ff_range_chr_to_jpeg_16_rvv, zve32x, zba
 endfunc
 
 func ff_range_chr_from_jpeg_16_rvv, zve32x, zba
+        lpad    0
         li      t1, 1799
         li      t2, 4081085
 1:
diff --git a/libswscale/riscv/rgb2rgb_rvb.S b/libswscale/riscv/rgb2rgb_rvb.S
index d18e5ba01b..af9ce2d215 100644
--- a/libswscale/riscv/rgb2rgb_rvb.S
+++ b/libswscale/riscv/rgb2rgb_rvb.S
@@ -24,6 +24,7 @@
 
 #if (__riscv_xlen >= 64)
 func ff_shuffle_bytes_3210_rvb, zba, zbb
+        lpad    0
         srli    a2, a2, 2
         bswap32_rvb a1, a0, a2
 endfunc
diff --git a/libswscale/riscv/rgb2rgb_rvv.S b/libswscale/riscv/rgb2rgb_rvv.S
index e1270ac0df..a1a927b00f 100644
--- a/libswscale/riscv/rgb2rgb_rvv.S
+++ b/libswscale/riscv/rgb2rgb_rvv.S
@@ -21,11 +21,13 @@
 #include "libavutil/riscv/asm.S"
 
 func ff_shuffle_bytes_0321_rvv, zve32x
+        lpad    0
         li      t1, 0x00ff00ff
         j       1f
 endfunc
 
 func ff_shuffle_bytes_2103_rvv, zve32x, zba
+        lpad    0
         li      t1, ~0x00ff00ff
 1:
         not     t2, t1
@@ -49,12 +51,14 @@ func ff_shuffle_bytes_2103_rvv, zve32x, zba
 endfunc
 
 func ff_shuffle_bytes_1230_rvv, zve32x
+        lpad    0
         li      t1, 24
         li      t2, 8
         j       3f
 endfunc
 
 func ff_shuffle_bytes_3012_rvv, zve32x, zba
+        lpad    0
         li      t1, 8
         li      t2, 24
 3:
@@ -75,6 +79,7 @@ func ff_shuffle_bytes_3012_rvv, zve32x, zba
 endfunc
 
 func ff_interleave_bytes_rvv, zve32x, zba
+        lpad    0
 1:
         mv      t0, a0
         mv      t1, a1
@@ -101,6 +106,7 @@ func ff_interleave_bytes_rvv, zve32x, zba
 endfunc
 
 func ff_deinterleave_bytes_rvv, zve32x, zba
+        lpad    0
 1:
         mv      t0, a0
         mv      t1, a1
@@ -127,6 +133,7 @@ func ff_deinterleave_bytes_rvv, zve32x, zba
 endfunc
 
 .macro yuy2_to_i422p luma, chroma
+        lpad    0
         srai    t4, a4, 1 // pixel width -> chroma width
         lw      t6, (sp)
         slli    t5, a4, 1 // pixel width -> (source) byte width