diff options
Diffstat (limited to 'riscv/insns/sha.h')
| -rw-r--r-- | riscv/insns/sha.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/riscv/insns/sha.h b/riscv/insns/sha.h new file mode 100644 index 00000000..fcec6249 --- /dev/null +++ b/riscv/insns/sha.h @@ -0,0 +1,11 @@ +require_extension('P'); +require_rv64; +sreg_t sshamt = P_FIELD(RS2, 0, 8); +if (RS1 == 0) + WRITE_RD(0); +else if (sshamt >= 64) + WRITE_RD(0); +else if (sshamt <= -64) + WRITE_RD((RS1 & 0x8000000000000000) ? 0xffffffffffffffff : 0); +else + WRITE_RD(sshamt >= 0 ? (RS1 << sshamt) : ((sreg_t)RS1 >> -sshamt)); |