Mirrors/openssl
0
0
Fork 0
mirror of https://github.com/openssl/openssl.git synced 2026-01-18 17:11:31 +01:00
Code Issues Packages Projects Releases Wiki Activity

SM4-CBC performance improvement on RISC-V

Browse Source 
Modify the IV update method to further improve the performance of
SM4-CBC encryption on the RISC-V architecture.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Neil Horman <nhorman@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29451)
This commit is contained in:
zhoulu
2025-12-19 10:08:02 +08:00
committed by Tomas Mraz
parent 14018b02df
commit 2d75c5e383
2 changed files with 37 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
crypto/perlasm/riscv.pm
View File

@@ -468,6 +468,16 @@ sub vadd_vv {
return ".word ".($template | ($vm << 25) | ($vs2 << 20) | ($vs1 << 15) | ($vd << 7));
}
sub vrgather_vv {
# vrgather.vv vd, vs2, vs1, vm
my $template = 0b001100_0_00000_00000_000_00000_1010111;
my $vd = read_vreg shift;
my $vs2 = read_vreg shift;
my $vs1 = read_vreg shift;
my $vm = read_mask_vreg shift;
return ".word ".($template | ($vm << 25) | ($vs2 << 20) | ($vs1 << 15) | ($vd << 7));
}
sub vadd_vx {
# vadd.vx vd, vs2, rs1, vm
my $template = 0b000000_0_00000_00000_100_00000_1010111;

44
crypto/sm4/asm/sm4-riscv64-zvksed.pl
View File

@@ -236,8 +236,14 @@ my ($in,$out,$len,$keys,$ivp)=("a0","a1","a2","a3","a4");
my ($tmp,$base)=("t0","t2");
my ($vdata0,$vdata1,$vdata2,$vdata3,$vdata4,$vdata5,$vdata6,$vdata7)=("v1","v2","v3","v4","v5","v6","v7","v24");
my ($vivec)=("v8");
my ($vindex)=("v0");
$code .= <<___;
.section .rodata
.align 4
.Lreverse_index:
.word 3, 2, 1, 0
.text
.p2align 3
.globl rv64i_zvksed_sm4_cbc_encrypt
.type rv64i_zvksed_sm4_cbc_encrypt,\@function
@@ -254,6 +260,10 @@ rv64i_zvksed_sm4_cbc_encrypt:
# Load IV
@{[vle32_v $vivec, $ivp]}
# Load the reverse index (for IV updates)
la $tmp, .Lreverse_index
@{[vle32_v $vindex, $tmp]}
# =====================================================
# If data length ≥ 64 bytes, process 4 blocks in batch:
# 4-block CBC encryption pipeline:
@@ -285,12 +295,8 @@ rv64i_zvksed_sm4_cbc_encrypt:
@{[enc_blk $vdata0]}
@{[vrev8_v $vdata0, $vdata0]}
# Save the ciphertext (in reverse element order)
li $tmp_stride, $STRIDE
@{[reverse_order_S $vdata0, $out]}
#Update IV to ciphertext block 0
@{[vle32_v $vivec, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vrgather_vv $vivec, $vdata0, $vindex]}
@{[vxor_vv $vdata1, $vdata1, $vivec]}
@@ -298,11 +304,8 @@ rv64i_zvksed_sm4_cbc_encrypt:
@{[enc_blk $vdata1]}
@{[vrev8_v $vdata1, $vdata1]}
@{[reverse_order_S $vdata1, $out]}
#Update IV to ciphertext block 1
@{[vle32_v $vivec, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vrgather_vv $vivec, $vdata1, $vindex]}
@{[vxor_vv $vdata2, $vdata2, $vivec]}
@@ -310,10 +313,8 @@ rv64i_zvksed_sm4_cbc_encrypt:
@{[enc_blk $vdata2]}
@{[vrev8_v $vdata2, $vdata2]}
@{[reverse_order_S $vdata2, $out]}
#Update IV to ciphertext block 2
@{[vle32_v $vivec, $out]}
addi $out, $out, $BLOCK_SIZE
@{[vrgather_vv $vivec, $vdata2, $vindex]}
@{[vxor_vv $vdata3, $vdata3, $vivec]}
@@ -321,9 +322,18 @@ rv64i_zvksed_sm4_cbc_encrypt:
@{[enc_blk $vdata3]}
@{[vrev8_v $vdata3, $vdata3]}
@{[reverse_order_S $vdata3, $out]}
#Update IV to ciphertext block 3
@{[vle32_v $vivec, $out]}
@{[vrgather_vv $vivec, $vdata3, $vindex]}
# Save the ciphertext (in reverse element order)
li $tmp_stride, $STRIDE
@{[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
addi $len, $len, -$FOUR_BLOCKS
@@ -344,12 +354,12 @@ rv64i_zvksed_sm4_cbc_encrypt:
@{[enc_blk $vdata0]}
@{[vrev8_v $vdata0, $vdata0]}
# Update IV to ciphertext block 0
@{[vrgather_vv $vivec, $vdata0, $vindex]}
# Save the ciphertext (in reverse element order)
li $tmp_stride, $STRIDE
@{[reverse_order_S $vdata0, $out]}
# Update IV to ciphertext block 0
@{[vle32_v $vivec, $out]}
addi $out, $out, $BLOCK_SIZE
addi $len, $len, -$BLOCK_SIZE