riscv: SM3: Provide a Zvksh-based implementation

The upcoming RISC-V vector crypto extensions feature
a Zvksh extension, that provides SM3-specific istructions.
This patch provides an implementation that utilizes this
extension if available.

Tested on QEMU and no regressions observed.

Signed-off-by: Charalampos Mitrodimas <charalampos.mitrodimas@vrull.eu>
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21923)

1 files changed, 25 insertions, 0 deletions

diff --git a/crypto/perlasm/riscv.pm b/crypto/perlasm/riscv.pm
index 7db6305877..f1cb4cc6d9 100644
--- a/crypto/perlasm/riscv.pm
+++ b/crypto/perlasm/riscv.pm
@@ -414,6 +414,11 @@ sub vsetivli__x0_4_e64_m1_tu_mu {
     return ".word 0xc1827057";
 }
 
+sub vsetivli__x0_8_e32_m1_tu_mu {
+    # vsetivli x0, 8, e32, m1, tu, mu
+    return ".word 0xc1047057";
+}
+
 sub vslidedown_vi {
     # vslidedown.vi vd, vs2, uimm
     my $template = 0b0011111_00000_00000_011_00000_1010111;
@@ -663,4 +668,24 @@ sub vsm4r_vs {
     return ".word ".($template | ($vs2 << 20) | ($vd << 7));
 }
 
+## zvksh instructions
+
+sub vsm3c_vi {
+    # vsm3c.vi vd, vs2, uimm
+    my $template = 0b1010111_00000_00000_010_00000_1110111;
+    my $vd = read_vreg shift;
+    my $vs2 = read_vreg shift;
+    my $uimm = shift;
+    return ".word ".($template | ($vs2 << 20) | ($uimm << 15 ) | ($vd << 7));
+}
+
+sub vsm3me_vv {
+    # vsm3me.vv vd, vs2, vs1
+    my $template = 0b1000001_00000_00000_010_00000_1110111;
+    my $vd = read_vreg shift;
+    my $vs2 = read_vreg shift;
+    my $vs1 = read_vreg shift;
+    return ".word ".($template | ($vs2 << 20) | ($vs1 << 15 ) | ($vd << 7));
+}
+
 1;