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Instruction reordering to further improve SM4-CBC decryption performance on the RISC-V architecture

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Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/29544)
This commit is contained in:
zhoulu
2026-01-05 19:48:56 +08:00
committed by Neil Horman
parent d2e4f588b6
commit f1482a709d
1 changed files with 24 additions and 23 deletions
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47
crypto/sm4/asm/sm4-riscv64-zvksed.pl
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@@ -451,56 +451,56 @@ rv64i_zvksed_sm4_cbc_decrypt:
addi $base, $in, -128
@{[reverse_order_L $vivec, $base]}
# Save the plaintext (in reverse element order)
@{[reverse_order_S $vdata0, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata1, $vdata1, $vivec]}
addi $base, $in, -112
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata1, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata2, $vdata2, $vivec]}
addi $base, $in, -96
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata2, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata3, $vdata3, $vivec]}
addi $base, $in, -80
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata3, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata4, $vdata4, $vivec]}
addi $base, $in, -64
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata4, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata5, $vdata5, $vivec]}
addi $base, $in, -48
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata5, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata6, $vdata6, $vivec]}
addi $base, $in, -32
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata6, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata7, $vdata7, $vivec]}
addi $base, $in, -16
@{[reverse_order_L $vivec, $base]}
# Save the plaintext (in reverse element order)
@{[reverse_order_S $vdata0, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata1, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata2, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata3, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata4, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata5, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata6, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata7, $out]}
addi $out, $out, $BLOCK_SIZE
@@ -548,28 +548,29 @@ rv64i_zvksed_sm4_cbc_decrypt:
# Update ciphertext to IV (in reverse element order)
addi $base, $in, -64
@{[reverse_order_L $vivec, $base]}
# Save the plaintext (in reverse element order)
@{[reverse_order_S $vdata0, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata1, $vdata1, $vivec]}
addi $base, $in, -48
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata1, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata2, $vdata2, $vivec]}
addi $base, $in, -32
@{[reverse_order_L $vivec, $base]}
@{[reverse_order_S $vdata2, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vxor_vv $vdata3, $vdata3, $vivec]}
addi $base, $in, -16
@{[reverse_order_L $vivec, $base]}
# Save the plaintext (in reverse element order)
@{[reverse_order_S $vdata0, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata1, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata2, $out]}
addi $out, $out, $BLOCK_SIZE
@{[reverse_order_S $vdata3, $out]}
addi $out, $out, $BLOCK_SIZE