scalar-crypto: Initial spike support for v0.8.1 (#635)

Brief:

- This commit adds spike support for the scalar cryptography extension.
  See the riscv-crypto repository (https://github.com/riscv/riscv-crypto)
  for more information on this extension.

- It is based on the experimental patch which has so far been kept in the
  riscv-crypto repository. Now that scalar crypto is nearly at the "freeze"
  stage and entering opcode consistency review, it makes sense to start
  upstreaming our experimental version.

- In terms of compiler support - we are using an experimental patch in
  the riscv-crypto repository at the moment, others are working on an
  upstream appropriate version.

Details:

- Add support for dedicated scalar crypto instructions.

- Add very basic support for the entropy source (entropy_source.h).
  Much of the behaviour of this is implementation specific. This model
  aims to provide the bare minimum of functionality which can be used to
  quickly develop software. It uses /dev/urandom as its entropy source for
  now.

- Scalar crypto is unique in that it _borrows_ instructions from the
  Bitmanipulation extension. This is currently _not_ encoded in the patch,
  as I didn't want to damage anything in Bitmanip which is currently under
  review. However, I've added a macro in riscv/decode.h called
  "require_either_extension(A,B)", which allows instructions to be valid
  opcodes iff they are in one or both extensions.

 On branch scalar-crypto
 Changes to be committed:
	modified:   README.md
	modified:   riscv/decode.h
	modified:   riscv/encoding.h
	new file:   riscv/entropy_source.h
	new file:   riscv/insns/aes64im.h
	new file:   riscv/insns/aes64ks1i.h
	new file:   riscv/insns/aes64ks2.h
	new file:   riscv/insns/aes_common.h
	new file:   riscv/insns/aesds.h
	new file:   riscv/insns/aesdsm.h
	new file:   riscv/insns/aeses.h
	new file:   riscv/insns/aesesm.h
	new file:   riscv/insns/sha256sig0.h
	new file:   riscv/insns/sha256sig1.h
	new file:   riscv/insns/sha256sum0.h
	new file:   riscv/insns/sha256sum1.h
	new file:   riscv/insns/sha512sig0.h
	new file:   riscv/insns/sha512sig0h.h
	new file:   riscv/insns/sha512sig0l.h
	new file:   riscv/insns/sha512sig1.h
	new file:   riscv/insns/sha512sig1h.h
	new file:   riscv/insns/sha512sig1l.h
	new file:   riscv/insns/sha512sum0.h
	new file:   riscv/insns/sha512sum0r.h
	new file:   riscv/insns/sha512sum1.h
	new file:   riscv/insns/sha512sum1r.h
	new file:   riscv/insns/sm3p0.h
	new file:   riscv/insns/sm3p1.h
	new file:   riscv/insns/sm4_common.h
	new file:   riscv/insns/sm4ed.h
	new file:   riscv/insns/sm4ks.h
	modified:   riscv/processor.cc
	modified:   riscv/processor.h
	modified:   riscv/riscv.mk.in

1 files changed, 87 insertions, 0 deletions

diff --git a/riscv/encoding.h b/riscv/encoding.h
index af2b786..5e502b8 100644
--- a/riscv/encoding.h
+++ b/riscv/encoding.h
@@ -928,6 +928,62 @@
 #define MASK_BFPW  0xfe00707f
 #define MATCH_XPERM_W 0x28000033
 #define MASK_XPERM_W  0xfe00707f
+// Crypto ISE Begin
+#define MASK_POLLENTROPY  0xfffff07f
+#define MATCH_POLLENTROPY 0xf1500073
+#define MASK_GETNOISE  0xfffff07f
+#define MATCH_GETNOISE 0x7a900073
+#define MASK_SM4ED  0x3e007fff
+#define MATCH_SM4ED 0x30000033
+#define MASK_SM4KS  0x3e007fff
+#define MATCH_SM4KS 0x34000033
+#define MASK_SM3P0  0xfff0707f
+#define MATCH_SM3P0 0x10801013
+#define MASK_SM3P1  0xfff0707f
+#define MATCH_SM3P1 0x10901013
+#define MASK_SHA256SUM0  0xfff0707f
+#define MATCH_SHA256SUM0 0x10001013
+#define MASK_SHA256SUM1  0xfff0707f
+#define MATCH_SHA256SUM1 0x10101013
+#define MASK_SHA256SIG0  0xfff0707f
+#define MATCH_SHA256SIG0 0x10201013
+#define MASK_SHA256SIG1  0xfff0707f
+#define MATCH_SHA256SIG1 0x10301013
+#define MASK_SHA512SUM0R  0xfe00707f
+#define MATCH_SHA512SUM0R 0x50000033
+#define MASK_SHA512SUM1R  0xfe00707f
+#define MATCH_SHA512SUM1R 0x52000033
+#define MASK_SHA512SIG0L  0xfe00707f
+#define MATCH_SHA512SIG0L 0x54000033
+#define MASK_SHA512SIG0H  0xfe00707f
+#define MATCH_SHA512SIG0H 0x5c000033
+#define MASK_SHA512SIG1L  0xfe00707f
+#define MATCH_SHA512SIG1L 0x56000033
+#define MASK_SHA512SIG1H  0xfe00707f
+#define MATCH_SHA512SIG1H 0x5e000033
+#define MASK_AES64KS1I  0xff00707f
+#define MATCH_AES64KS1I 0x31001013
+#define MASK_AES64IM  0xfff0707f
+#define MATCH_AES64IM 0x30001013
+#define MASK_AES64KS2  0xfe00707f
+#define MATCH_AES64KS2 0x7e000033
+#define MASK_AESESM  0x3e00707f
+#define MATCH_AESESM 0x36000033
+#define MASK_AESES  0x3e00707f
+#define MATCH_AESES 0x32000033
+#define MASK_AESDSM  0x3e00707f
+#define MATCH_AESDSM 0x3e000033
+#define MASK_AESDS  0x3e00707f
+#define MATCH_AESDS 0x3a000033
+#define MASK_SHA512SUM0  0xfff0707f
+#define MATCH_SHA512SUM0 0x10401013
+#define MASK_SHA512SUM1  0xfff0707f
+#define MATCH_SHA512SUM1 0x10501013
+#define MASK_SHA512SIG0  0xfff0707f
+#define MATCH_SHA512SIG0 0x10601013
+#define MASK_SHA512SIG1  0xfff0707f
+#define MATCH_SHA512SIG1 0x10701013
+// Crypto ISE End
 #define MATCH_ECALL 0x73
 #define MASK_ECALL  0xffffffff
 #define MATCH_EBREAK 0x100073
@@ -2276,6 +2332,8 @@
 #define CSR_MARCHID 0xf12
 #define CSR_MIMPID 0xf13
 #define CSR_MHARTID 0xf14
+#define CSR_MENTROPY 0xf15
+#define CSR_MNOISE 0x7a9
 #define CSR_HTIMEDELTAH 0x615
 #define CSR_CYCLEH 0xc80
 #define CSR_TIMEH 0xc81
@@ -2683,6 +2741,33 @@ DECLARE_INSN(packw, MATCH_PACKW, MASK_PACKW)
 DECLARE_INSN(packuw, MATCH_PACKUW, MASK_PACKUW)
 DECLARE_INSN(bfpw, MATCH_BFPW, MASK_BFPW)
 DECLARE_INSN(xperm_w, MATCH_XPERM_W, MASK_XPERM_W)
+DECLARE_INSN(sm4ed, MATCH_SM4ED, MASK_SM4ED)
+DECLARE_INSN(sm4ks, MATCH_SM4KS, MASK_SM4KS)
+DECLARE_INSN(aes64ks1i, MATCH_AES64KS1I, MASK_AES64KS1I)
+DECLARE_INSN(aes64ks2, MATCH_AES64KS2, MASK_AES64KS2)
+DECLARE_INSN(aes64im, MATCH_AES64IM, MASK_AES64IM)
+DECLARE_INSN(aesesm, MATCH_AESESM, MASK_AESESM)
+DECLARE_INSN(aeses, MATCH_AESES, MASK_AESES)
+DECLARE_INSN(aesdsm, MATCH_AESDSM, MASK_AESDSM)
+DECLARE_INSN(aesds, MATCH_AESDS, MASK_AESDS)
+DECLARE_INSN(sha256sig0, MATCH_SHA256SIG0, MASK_SHA256SIG0)
+DECLARE_INSN(sha256sig1, MATCH_SHA256SIG1, MASK_SHA256SIG1)
+DECLARE_INSN(sha256sum0, MATCH_SHA256SUM0, MASK_SHA256SUM0)
+DECLARE_INSN(sha256sum1, MATCH_SHA256SUM1, MASK_SHA256SUM1)
+DECLARE_INSN(sm3p0, MATCH_SM3P0, MASK_SM3P0)
+DECLARE_INSN(sm3p1, MATCH_SM3P1, MASK_SM3P1)
+DECLARE_INSN(sha512sig0l, MATCH_SHA512SIG0L, MASK_SHA512SIG0L)
+DECLARE_INSN(sha512sig0h, MATCH_SHA512SIG0H, MASK_SHA512SIG0H)
+DECLARE_INSN(sha512sig1l, MATCH_SHA512SIG1L, MASK_SHA512SIG1L)
+DECLARE_INSN(sha512sig1h, MATCH_SHA512SIG1H, MASK_SHA512SIG1H)
+DECLARE_INSN(sha512sum0r, MATCH_SHA512SUM0R, MASK_SHA512SUM0R)
+DECLARE_INSN(sha512sum1r, MATCH_SHA512SUM1R, MASK_SHA512SUM1R)
+DECLARE_INSN(sha512sig0, MATCH_SHA512SIG0, MASK_SHA512SIG0)
+DECLARE_INSN(sha512sig1, MATCH_SHA512SIG1, MASK_SHA512SIG1)
+DECLARE_INSN(sha512sum0, MATCH_SHA512SUM0, MASK_SHA512SUM0)
+DECLARE_INSN(sha512sum1, MATCH_SHA512SUM1, MASK_SHA512SUM1)
+DECLARE_INSN(pollentropy, MATCH_POLLENTROPY, MASK_POLLENTROPY)
+DECLARE_INSN(getnoise, MATCH_GETNOISE, MASK_GETNOISE)
 DECLARE_INSN(ecall, MATCH_ECALL, MASK_ECALL)
 DECLARE_INSN(ebreak, MATCH_EBREAK, MASK_EBREAK)
 DECLARE_INSN(uret, MATCH_URET, MASK_URET)
@@ -3464,6 +3549,8 @@ DECLARE_CSR(mvendorid, CSR_MVENDORID)
 DECLARE_CSR(marchid, CSR_MARCHID)
 DECLARE_CSR(mimpid, CSR_MIMPID)
 DECLARE_CSR(mhartid, CSR_MHARTID)
+DECLARE_CSR(mentropy, CSR_MENTROPY)
+DECLARE_CSR(mnoise, CSR_MNOISE)
 DECLARE_CSR(htimedeltah, CSR_HTIMEDELTAH)
 DECLARE_CSR(cycleh, CSR_CYCLEH)
 DECLARE_CSR(timeh, CSR_TIMEH)