From: Andrew Waterman <waterman@cs.berkeley.edu>
Date: Fri, 4 Sep 2015 20:39:42 +0000 (-0700)
Subject: Move towards RVC v1.8
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=784e9891af88db221b57bdffbea74d1c6bf99971;p=riscv-isa-sim.git

Move towards RVC v1.8
---

diff --git a/riscv/decode.h b/riscv/decode.h
index 91ad73e..16e57d7 100644
--- a/riscv/decode.h
+++ b/riscv/decode.h
@@ -89,7 +89,6 @@ public:
   uint64_t rvc_rd() { return rd(); }
   uint64_t rvc_rs1() { return rd(); }
   uint64_t rvc_rs2() { return x(2, 5); }
-  uint64_t rvc_rds() { return 8 + x(10, 3); }
   uint64_t rvc_rs1s() { return 8 + x(7, 3); }
   uint64_t rvc_rs2s() { return 8 + x(2, 3); }
 private:
@@ -122,26 +121,33 @@ private:
 #define READ_REG(reg) STATE.XPR[reg]
 #define RS1 READ_REG(insn.rs1())
 #define RS2 READ_REG(insn.rs2())
-#define WRITE_REG(reg, value) STATE.XPR.write(reg, value)
 #define WRITE_RD(value) WRITE_REG(insn.rd(), value)
 
-#ifdef RISCV_ENABLE_COMMITLOG
-  #undef WRITE_REG
-  #define WRITE_REG(reg, value) ({ \
-        reg_t wdata = (value); /* value is a func with side-effects */ \
-        STATE.log_reg_write = (commit_log_reg_t){(reg) << 1, wdata}; \
-        STATE.XPR.write(reg, wdata); \
-      })
+#ifndef RISCV_ENABLE_COMMITLOG
+# define WRITE_REG(reg, value) STATE.XPR.write(reg, value)
+# define WRITE_FREG(reg, value) DO_WRITE_FREG(reg, value)
+#else
+# define WRITE_REG(reg, value) ({ \
+    reg_t wdata = (value); /* value may have side effects */ \
+    STATE.log_reg_write = (commit_log_reg_t){(reg) << 1, wdata}; \
+    STATE.XPR.write(reg, wdata); \
+  })
+# define WRITE_FREG(reg, value) ({ \
+    freg_t wdata = (value); /* value may have side effects */ \
+    STATE.log_reg_write = (commit_log_reg_t){((reg) << 1) | 1, wdata}; \
+    DO_WRITE_FREG(reg, wdata); \
+  })
 #endif
 
 // RVC macros
-#define WRITE_RVC_RDS(value) WRITE_REG(insn.rvc_rds(), value)
-#define WRITE_RVC_RS1S(value) WRITE_REG(insn.rvc_rs1s(), value)
 #define WRITE_RVC_RS2S(value) WRITE_REG(insn.rvc_rs2s(), value)
+#define WRITE_RVC_FRS2S(value) WRITE_FREG(insn.rvc_rs2s(), value)
 #define RVC_RS1 READ_REG(insn.rvc_rs1())
 #define RVC_RS2 READ_REG(insn.rvc_rs2())
 #define RVC_RS1S READ_REG(insn.rvc_rs1s())
 #define RVC_RS2S READ_REG(insn.rvc_rs2s())
+#define RVC_FRS2 STATE.FPR[insn.rvc_rs2()]
+#define RVC_FRS2S STATE.FPR[insn.rvc_rs2s()]
 #define RVC_SP READ_REG(X_SP)
 
 // FPU macros
@@ -150,17 +156,8 @@ private:
 #define FRS3 STATE.FPR[insn.rs3()]
 #define dirty_fp_state (STATE.mstatus |= MSTATUS_FS | (xlen == 64 ? MSTATUS64_SD : MSTATUS32_SD))
 #define dirty_ext_state (STATE.mstatus |= MSTATUS_XS | (xlen == 64 ? MSTATUS64_SD : MSTATUS32_SD))
-#define do_write_frd(value) (STATE.FPR.write(insn.rd(), value), dirty_fp_state)
- 
-#ifndef RISCV_ENABLE_COMMITLOG
-# define WRITE_FRD(value) do_write_frd(value)
-#else
-# define WRITE_FRD(value) ({ \
-        freg_t wdata = (value); /* value may have side effects */ \
-        STATE.log_reg_write = (commit_log_reg_t){(insn.rd() << 1) | 1, wdata}; \
-        do_write_frd(wdata); \
-      })
-#endif
+#define DO_WRITE_FREG(reg, value) (STATE.FPR.write(reg, value), dirty_fp_state)
+#define WRITE_FRD(value) WRITE_FREG(insn.rd(), value)
  
 #define SHAMT (insn.i_imm() & 0x3F)
 #define BRANCH_TARGET (pc + insn.sb_imm())
diff --git a/riscv/encoding.h b/riscv/encoding.h
index d4f08fc..039ffdf 100644
--- a/riscv/encoding.h
+++ b/riscv/encoding.h
@@ -223,30 +223,38 @@
 #define MASK_BNE  0x707f
 #define MATCH_C_ADD 0x1000
 #define MASK_C_ADD  0xf003
-#define MATCH_C_ADD3 0xa000
-#define MASK_C_ADD3  0xe063
 #define MATCH_C_ADDI 0xc002
 #define MASK_C_ADDI  0xe003
-#define MATCH_C_ADDI4SPN 0xa001
+#define MATCH_C_ADDI4SPN 0x8000
 #define MASK_C_ADDI4SPN  0xe003
 #define MATCH_C_ADDIW 0xe002
 #define MASK_C_ADDIW  0xe003
-#define MATCH_C_ADDW 0x9000
+#define MATCH_C_ADDW 0x8001
 #define MASK_C_ADDW  0xf003
-#define MATCH_C_AND3 0xa060
-#define MASK_C_AND3  0xe063
 #define MATCH_C_BEQZ 0x4002
 #define MASK_C_BEQZ  0xe003
 #define MATCH_C_BNEZ 0x6002
 #define MASK_C_BNEZ  0xe003
+#define MATCH_C_FLD 0xa000
+#define MASK_C_FLD  0xe003
+#define MATCH_C_FLDSP 0xa001
+#define MASK_C_FLDSP  0xe003
+#define MATCH_C_FLW 0xe000
+#define MASK_C_FLW  0xe003
+#define MATCH_C_FLWSP 0xe001
+#define MASK_C_FLWSP  0xe003
+#define MATCH_C_FSD 0x2000
+#define MASK_C_FSD  0xe003
+#define MATCH_C_FSDSP 0x2001
+#define MASK_C_FSDSP  0xe003
+#define MATCH_C_FSW 0x6000
+#define MASK_C_FSW  0xe003
+#define MATCH_C_FSWSP 0x6001
+#define MASK_C_FSWSP  0xe003
 #define MATCH_C_J 0x2
 #define MASK_C_J  0xe003
 #define MATCH_C_JAL 0x2002
 #define MASK_C_JAL  0xe003
-#define MATCH_C_LD 0xe000
-#define MASK_C_LD  0xe003
-#define MATCH_C_LDSP 0xe001
-#define MASK_C_LDSP  0xe003
 #define MATCH_C_LI 0x8002
 #define MASK_C_LI  0xe003
 #define MATCH_C_LUI 0xa002
@@ -257,24 +265,8 @@
 #define MASK_C_LWSP  0xe003
 #define MATCH_C_MV 0x0
 #define MASK_C_MV  0xf003
-#define MATCH_C_OR3 0xa040
-#define MASK_C_OR3  0xe063
-#define MATCH_C_SD 0x6000
-#define MASK_C_SD  0xe003
-#define MATCH_C_SDSP 0x6001
-#define MASK_C_SDSP  0xe003
 #define MATCH_C_SLLI 0x1
 #define MASK_C_SLLI  0xe003
-#define MATCH_C_SLLIW 0x8001
-#define MASK_C_SLLIW  0xe003
-#define MATCH_C_SRAI 0x2000
-#define MASK_C_SRAI  0xe003
-#define MATCH_C_SRLI 0x2001
-#define MASK_C_SRLI  0xe003
-#define MATCH_C_SUB 0x8000
-#define MASK_C_SUB  0xf003
-#define MATCH_C_SUB3 0xa020
-#define MASK_C_SUB3  0xe063
 #define MATCH_C_SW 0x4000
 #define MASK_C_SW  0xe003
 #define MATCH_C_SWSP 0x4001
@@ -653,32 +645,28 @@ DECLARE_INSN(blt, MATCH_BLT, MASK_BLT)
 DECLARE_INSN(bltu, MATCH_BLTU, MASK_BLTU)
 DECLARE_INSN(bne, MATCH_BNE, MASK_BNE)
 DECLARE_INSN(c_add, MATCH_C_ADD, MASK_C_ADD)
-DECLARE_INSN(c_add3, MATCH_C_ADD3, MASK_C_ADD3)
 DECLARE_INSN(c_addi, MATCH_C_ADDI, MASK_C_ADDI)
 DECLARE_INSN(c_addi4spn, MATCH_C_ADDI4SPN, MASK_C_ADDI4SPN)
 DECLARE_INSN(c_addiw, MATCH_C_ADDIW, MASK_C_ADDIW)
 DECLARE_INSN(c_addw, MATCH_C_ADDW, MASK_C_ADDW)
-DECLARE_INSN(c_and3, MATCH_C_AND3, MASK_C_AND3)
 DECLARE_INSN(c_beqz, MATCH_C_BEQZ, MASK_C_BEQZ)
 DECLARE_INSN(c_bnez, MATCH_C_BNEZ, MASK_C_BNEZ)
+DECLARE_INSN(c_fld, MATCH_C_FLD, MASK_C_FLD)
+DECLARE_INSN(c_fldsp, MATCH_C_FLDSP, MASK_C_FLDSP)
+DECLARE_INSN(c_flw, MATCH_C_FLW, MASK_C_FLW)
+DECLARE_INSN(c_flwsp, MATCH_C_FLWSP, MASK_C_FLWSP)
+DECLARE_INSN(c_fsd, MATCH_C_FSD, MASK_C_FSD)
+DECLARE_INSN(c_fsdsp, MATCH_C_FSDSP, MASK_C_FSDSP)
+DECLARE_INSN(c_fsw, MATCH_C_FSW, MASK_C_FSW)
+DECLARE_INSN(c_fswsp, MATCH_C_FSWSP, MASK_C_FSWSP)
 DECLARE_INSN(c_j, MATCH_C_J, MASK_C_J)
 DECLARE_INSN(c_jal, MATCH_C_JAL, MASK_C_JAL)
-DECLARE_INSN(c_ld, MATCH_C_LD, MASK_C_LD)
-DECLARE_INSN(c_ldsp, MATCH_C_LDSP, MASK_C_LDSP)
 DECLARE_INSN(c_li, MATCH_C_LI, MASK_C_LI)
 DECLARE_INSN(c_lui, MATCH_C_LUI, MASK_C_LUI)
 DECLARE_INSN(c_lw, MATCH_C_LW, MASK_C_LW)
 DECLARE_INSN(c_lwsp, MATCH_C_LWSP, MASK_C_LWSP)
 DECLARE_INSN(c_mv, MATCH_C_MV, MASK_C_MV)
-DECLARE_INSN(c_or3, MATCH_C_OR3, MASK_C_OR3)
-DECLARE_INSN(c_sd, MATCH_C_SD, MASK_C_SD)
-DECLARE_INSN(c_sdsp, MATCH_C_SDSP, MASK_C_SDSP)
 DECLARE_INSN(c_slli, MATCH_C_SLLI, MASK_C_SLLI)
-DECLARE_INSN(c_slliw, MATCH_C_SLLIW, MASK_C_SLLIW)
-DECLARE_INSN(c_srai, MATCH_C_SRAI, MASK_C_SRAI)
-DECLARE_INSN(c_srli, MATCH_C_SRLI, MASK_C_SRLI)
-DECLARE_INSN(c_sub, MATCH_C_SUB, MASK_C_SUB)
-DECLARE_INSN(c_sub3, MATCH_C_SUB3, MASK_C_SUB3)
 DECLARE_INSN(c_sw, MATCH_C_SW, MASK_C_SW)
 DECLARE_INSN(c_swsp, MATCH_C_SWSP, MASK_C_SWSP)
 DECLARE_INSN(csrrc, MATCH_CSRRC, MASK_CSRRC)
diff --git a/riscv/insns/c_add.h b/riscv/insns/c_add.h
index 64bc5f7..c13385e 100644
--- a/riscv/insns/c_add.h
+++ b/riscv/insns/c_add.h
@@ -1,7 +1,12 @@
 require_extension('C');
-require(insn.rvc_rs2() != 0);
-if (insn.rvc_rd() == 0) { // c.ebreak
-  throw trap_breakpoint();
+if (insn.rvc_rs2() == 0) {
+  if (insn.rvc_rs1() == 0) { // c.ebreak
+    throw trap_breakpoint();
+  } else { // c.jalr
+    reg_t tmp = npc;
+    set_pc(RVC_RS1 & ~reg_t(1));
+    WRITE_REG(X_RA, tmp);
+  }
 } else {
   WRITE_RD(sext_xlen(RVC_RS1 + RVC_RS2));
 }
diff --git a/riscv/insns/c_add3.h b/riscv/insns/c_add3.h
deleted file mode 100644
index fabf6dd..0000000
--- a/riscv/insns/c_add3.h
+++ /dev/null
@@ -1,2 +0,0 @@
-require_extension('C');
-WRITE_RVC_RDS(sext_xlen(RVC_RS1S + RVC_RS2S));
diff --git a/riscv/insns/c_addi.h b/riscv/insns/c_addi.h
index cea2a18..eb98344 100644
--- a/riscv/insns/c_addi.h
+++ b/riscv/insns/c_addi.h
@@ -1,7 +1,2 @@
 require_extension('C');
-if (insn.rvc_rd() == 0) { // c.addi16sp
-  WRITE_REG(X_SP, sext_xlen(RVC_SP + insn.rvc_addi16sp_imm()));
-} else {
-  require(insn.rvc_imm() != 0);
-  WRITE_RD(sext_xlen(RVC_RS1 + insn.rvc_imm()));
-}
+WRITE_RD(sext_xlen(RVC_RS1 + insn.rvc_imm()));
diff --git a/riscv/insns/c_addiw.h b/riscv/insns/c_addiw.h
index ae4980e..fe87872 100644
--- a/riscv/insns/c_addiw.h
+++ b/riscv/insns/c_addiw.h
@@ -1,7 +1,2 @@
 require_extension('C');
-if (xlen == 32) {
-  WRITE_RD(RVC_RS1 & insn.rvc_imm()); // c.andi
-} else {
-  require(insn.rvc_rd() != 0);
-  WRITE_RD(sext32(RVC_RS1 + insn.rvc_imm()));
-}
+WRITE_RD(sext32(RVC_RS1 + insn.rvc_imm()));
diff --git a/riscv/insns/c_addw.h b/riscv/insns/c_addw.h
index 36559b7..fef554d 100644
--- a/riscv/insns/c_addw.h
+++ b/riscv/insns/c_addw.h
@@ -1,4 +1,3 @@
 require_extension('C');
 require_rv64;
-require(insn.rvc_rd() != 0 && insn.rvc_rs2() != 0);
 WRITE_RD(sext32(RVC_RS1 + RVC_RS2));
diff --git a/riscv/insns/c_and3.h b/riscv/insns/c_and3.h
deleted file mode 100644
index 5543950..0000000
--- a/riscv/insns/c_and3.h
+++ /dev/null
@@ -1,2 +0,0 @@
-require_extension('C');
-WRITE_RVC_RDS(RVC_RS1S & RVC_RS2S);
diff --git a/riscv/insns/c_fld.h b/riscv/insns/c_fld.h
new file mode 100644
index 0000000..10d14f8
--- /dev/null
+++ b/riscv/insns/c_fld.h
@@ -0,0 +1,4 @@
+require_extension('C');
+require_extension('D');
+require_fp;
+WRITE_RVC_FRS2S(MMU.load_int64(RVC_RS1S + insn.rvc_ld_imm()));
diff --git a/riscv/insns/c_fldsp.h b/riscv/insns/c_fldsp.h
new file mode 100644
index 0000000..8b1e19f
--- /dev/null
+++ b/riscv/insns/c_fldsp.h
@@ -0,0 +1,4 @@
+require_extension('C');
+require_extension('D');
+require_fp;
+WRITE_FRD(MMU.load_int64(RVC_SP + insn.rvc_ldsp_imm()));
diff --git a/riscv/insns/c_flw.h b/riscv/insns/c_flw.h
new file mode 100644
index 0000000..ad737aa
--- /dev/null
+++ b/riscv/insns/c_flw.h
@@ -0,0 +1,8 @@
+require_extension('C');
+if (xlen == 32) {
+  require_extension('F');
+  require_fp;
+  WRITE_RVC_FRS2S(MMU.load_int32(RVC_RS1S + insn.rvc_lw_imm()));
+} else {
+  WRITE_RVC_RS2S(MMU.load_int64(RVC_RS1S + insn.rvc_ld_imm()));
+}
diff --git a/riscv/insns/c_flwsp.h b/riscv/insns/c_flwsp.h
new file mode 100644
index 0000000..2d2dd5c
--- /dev/null
+++ b/riscv/insns/c_flwsp.h
@@ -0,0 +1,9 @@
+require_extension('C');
+if (xlen == 32) {
+  require_extension('F');
+  require_fp;
+  WRITE_FRD(MMU.load_int32(RVC_SP + insn.rvc_lwsp_imm()));
+} else {
+  require(insn.rvc_rd() != 0);
+  WRITE_RD(MMU.load_int64(RVC_SP + insn.rvc_ldsp_imm()));
+}
diff --git a/riscv/insns/c_fsd.h b/riscv/insns/c_fsd.h
new file mode 100644
index 0000000..84f1a7f
--- /dev/null
+++ b/riscv/insns/c_fsd.h
@@ -0,0 +1,4 @@
+require_extension('C');
+require_extension('D');
+require_fp;
+MMU.store_uint64(RVC_RS1S + insn.rvc_ld_imm(), RVC_FRS2S);
diff --git a/riscv/insns/c_fsdsp.h b/riscv/insns/c_fsdsp.h
new file mode 100644
index 0000000..5c5c680
--- /dev/null
+++ b/riscv/insns/c_fsdsp.h
@@ -0,0 +1,4 @@
+require_extension('C');
+require_extension('D');
+require_fp;
+MMU.store_uint64(RVC_SP + insn.rvc_sdsp_imm(), RVC_FRS2);
diff --git a/riscv/insns/c_fsw.h b/riscv/insns/c_fsw.h
new file mode 100644
index 0000000..4089e3d
--- /dev/null
+++ b/riscv/insns/c_fsw.h
@@ -0,0 +1,8 @@
+require_extension('C');
+if (xlen == 32) {
+  require_extension('F');
+  require_fp;
+  MMU.store_uint32(RVC_RS1S + insn.rvc_lw_imm(), RVC_FRS2S);
+} else {
+  MMU.store_uint64(RVC_RS1S + insn.rvc_ld_imm(), RVC_RS2S);
+}
diff --git a/riscv/insns/c_fswsp.h b/riscv/insns/c_fswsp.h
new file mode 100644
index 0000000..8e2fedc
--- /dev/null
+++ b/riscv/insns/c_fswsp.h
@@ -0,0 +1,8 @@
+require_extension('C');
+if (xlen == 32) {
+  require_extension('F');
+  require_fp;
+  MMU.store_uint32(RVC_SP + insn.rvc_swsp_imm(), RVC_FRS2);
+} else {
+  MMU.store_uint64(RVC_SP + insn.rvc_sdsp_imm(), RVC_RS2);
+}
diff --git a/riscv/insns/c_ld.h b/riscv/insns/c_ld.h
deleted file mode 100644
index 876badd..0000000
--- a/riscv/insns/c_ld.h
+++ /dev/null
@@ -1,3 +0,0 @@
-require_extension('C');
-require_rv64;
-WRITE_RVC_RS2S(MMU.load_int64(RVC_RS1S + insn.rvc_ld_imm()));
diff --git a/riscv/insns/c_ldsp.h b/riscv/insns/c_ldsp.h
deleted file mode 100644
index aa98f33..0000000
--- a/riscv/insns/c_ldsp.h
+++ /dev/null
@@ -1,8 +0,0 @@
-require_extension('C');
-if (xlen == 32) {
-  if (sreg_t(RVC_RS1S) >= 0) // c.bgez
-    set_pc(pc + insn.rvc_b_imm());
-} else {
-  require(insn.rvc_rd() != 0);
-  WRITE_RD(MMU.load_int64(RVC_SP + insn.rvc_ldsp_imm()));
-}
diff --git a/riscv/insns/c_li.h b/riscv/insns/c_li.h
index 52e99c9..844686d 100644
--- a/riscv/insns/c_li.h
+++ b/riscv/insns/c_li.h
@@ -1,7 +1,3 @@
 require_extension('C');
 require(insn.rvc_rd() != 0);
-if (insn.rvc_imm() == 0) { // c.jr
-  set_pc(RVC_RS1 & ~reg_t(1));
-} else {
-  WRITE_RD(insn.rvc_imm());
-}
+WRITE_RD(insn.rvc_imm());
diff --git a/riscv/insns/c_lui.h b/riscv/insns/c_lui.h
index 040d7ec..cb76c61 100644
--- a/riscv/insns/c_lui.h
+++ b/riscv/insns/c_lui.h
@@ -1,9 +1,6 @@
 require_extension('C');
-require(insn.rvc_rd() != 0);
-if (insn.rvc_imm() == 0) { // c.jalr
-  reg_t tmp = npc;
-  set_pc(RVC_RS1 & ~reg_t(1));
-  WRITE_REG(X_RA, tmp);
+if (insn.rvc_rd() == 0) { // c.addi16sp
+  WRITE_REG(X_SP, sext_xlen(RVC_SP + insn.rvc_addi16sp_imm()));
 } else {
   WRITE_RD(insn.rvc_imm() << 12);
 }
diff --git a/riscv/insns/c_mv.h b/riscv/insns/c_mv.h
index df5cea6..4a23063 100644
--- a/riscv/insns/c_mv.h
+++ b/riscv/insns/c_mv.h
@@ -1,3 +1,7 @@
 require_extension('C');
-require(insn.rvc_rd() != 0);
-WRITE_RD(RVC_RS2);
+if (insn.rvc_rs2() == 0) {
+  require(insn.rvc_rd() != 0);
+  set_pc(RVC_RS1 & ~reg_t(1));
+} else {
+  WRITE_RD(RVC_RS2);
+}
diff --git a/riscv/insns/c_or3.h b/riscv/insns/c_or3.h
deleted file mode 100644
index 8596223..0000000
--- a/riscv/insns/c_or3.h
+++ /dev/null
@@ -1,2 +0,0 @@
-require_extension('C');
-WRITE_RVC_RDS(RVC_RS1S | RVC_RS2S);
diff --git a/riscv/insns/c_sd.h b/riscv/insns/c_sd.h
deleted file mode 100644
index 4551ced..0000000
--- a/riscv/insns/c_sd.h
+++ /dev/null
@@ -1,38 +0,0 @@
-require_extension('C');
-if (xlen == 32) {
-  int32_t res;
-  switch ((insn.bits() >> 10) & 7) {
-    case 0:
-      switch ((insn.bits() >> 5) & 3) {
-        case 0: res = RVC_RS1S ^ RVC_RS2S; // c.xor
-        case 1: res = int32_t(RVC_RS1S) >> (RVC_RS2S & 0x1f); // c.sra
-        default: require(0);
-      }
-      WRITE_RVC_RS1S(res);
-      break;
-
-    case 1:
-      switch ((insn.bits() >> 5) & 3) {
-        case 0: res = RVC_RS1S << (RVC_RS2S & 0x1f); // c.sll
-        case 1: res = uint32_t(RVC_RS1S) >> (RVC_RS2S & 0x1f); // c.srl
-        case 2: res = int32_t(RVC_RS1S) < int32_t(RVC_RS2S); // c.slt
-        case 3: res = uint32_t(RVC_RS1S) < uint32_t(RVC_RS2S); // c.sltu
-      }
-      WRITE_RVC_RS1S(res);
-      break;
-
-    case 3:
-      switch ((insn.bits() >> 5) & 3) {
-        case 0: res = RVC_RS1S << (RVC_RS2S & 0x1f); // c.sllr
-        case 1: res = uint32_t(RVC_RS1S) >> (RVC_RS2S & 0x1f); // c.srlr
-        case 2: res = int32_t(RVC_RS1S) < int32_t(RVC_RS2S); // c.sltr
-        case 3: res = uint32_t(RVC_RS1S) < uint32_t(RVC_RS2S); // c.sltur
-      }
-      WRITE_RVC_RS2S(res);
-      break;
-
-    default: require(0);
-  }
-} else {
-  MMU.store_uint64(RVC_RS1S + insn.rvc_ld_imm(), RVC_RS2S);
-}
diff --git a/riscv/insns/c_sdsp.h b/riscv/insns/c_sdsp.h
deleted file mode 100644
index db504ec..0000000
--- a/riscv/insns/c_sdsp.h
+++ /dev/null
@@ -1,7 +0,0 @@
-require_extension('C');
-if (xlen == 32) {
-  if (sreg_t(RVC_RS1S) < 0) // c.bltz
-    set_pc(pc + insn.rvc_b_imm());
-} else {
-  MMU.store_uint64(RVC_SP + insn.rvc_sdsp_imm(), RVC_RS2);
-}
diff --git a/riscv/insns/c_slliw.h b/riscv/insns/c_slliw.h
deleted file mode 100644
index 643bf74..0000000
--- a/riscv/insns/c_slliw.h
+++ /dev/null
@@ -1,13 +0,0 @@
-require_extension('C');
-if (xlen == 32) {
-  switch ((insn.bits() >> 5) & 3) {
-    case 0: WRITE_RVC_RS2S(sext_xlen(RVC_RS1S + insn.rvc_simm3())); // c.addin
-    case 1: WRITE_RVC_RS2S(sext_xlen(RVC_RS1S ^ insn.rvc_simm3())); // c.xorin
-    case 2: WRITE_RVC_RS2S(sext_xlen(RVC_RS1S | insn.rvc_simm3())); // c.orin
-    case 3: WRITE_RVC_RS2S(sext_xlen(RVC_RS1S & insn.rvc_simm3())); // c.andin
-  }
-} else {
-  require(insn.rvc_rd() != 0);
-  require(insn.rvc_imm() < 32);
-  WRITE_RD(sext32(RVC_RS1 << insn.rvc_imm()));
-}
diff --git a/riscv/insns/c_srai.h b/riscv/insns/c_srai.h
deleted file mode 100644
index 87d7b59..0000000
--- a/riscv/insns/c_srai.h
+++ /dev/null
@@ -1,3 +0,0 @@
-require_extension('C');
-require(insn.rvc_imm() < xlen);
-WRITE_RD(sext_xlen(sext_xlen(RVC_RS1) >> insn.rvc_imm()));
diff --git a/riscv/insns/c_srli.h b/riscv/insns/c_srli.h
deleted file mode 100644
index bf29f5f..0000000
--- a/riscv/insns/c_srli.h
+++ /dev/null
@@ -1,3 +0,0 @@
-require_extension('C');
-require(insn.rvc_imm() < xlen);
-WRITE_RD(sext_xlen(zext_xlen(RVC_RS1) >> insn.rvc_imm()));
diff --git a/riscv/insns/c_sub.h b/riscv/insns/c_sub.h
deleted file mode 100644
index 993fdd3..0000000
--- a/riscv/insns/c_sub.h
+++ /dev/null
@@ -1,3 +0,0 @@
-require_extension('C');
-require(insn.rvc_rd() != 0 && insn.rvc_rs2() != 0);
-WRITE_RD(sext_xlen(RVC_RS1 - RVC_RS2));
diff --git a/riscv/insns/c_sub3.h b/riscv/insns/c_sub3.h
deleted file mode 100644
index 50ed2c9..0000000
--- a/riscv/insns/c_sub3.h
+++ /dev/null
@@ -1,2 +0,0 @@
-require_extension('C');
-WRITE_RVC_RDS(sext_xlen(RVC_RS1S - RVC_RS2S));
diff --git a/spike_main/disasm.cc b/spike_main/disasm.cc
index e6336d0..e32bad5 100644
--- a/spike_main/disasm.cc
+++ b/spike_main/disasm.cc
@@ -144,12 +144,6 @@ struct : public arg_t {
   }
 } rvc_rs2s;
 
-struct : public arg_t {
-  std::string to_string(insn_t insn) const {
-    return xpr_name[insn.rvc_rds()];
-  }
-} rvc_rds;
-
 struct : public arg_t {
   std::string to_string(insn_t insn) const {
     return xpr_name[X_SP];
@@ -514,13 +508,13 @@ disassembler_t::disassembler_t()
   DISASM_INSN("add", c_add, 0, {&xrd, &xrd, &rvc_rs1});
   DISASM_INSN("addw", c_addw, 0, {&xrd, &xrd, &rvc_rs1});
   DISASM_INSN("lw", c_lwsp, 0, {&xrd, &rvc_lwsp_address});
-  DISASM_INSN("ld", c_ldsp, 0, {&xrd, &rvc_ldsp_address});
+  DISASM_INSN("flw", c_flwsp, 0, {&xrd, &rvc_lwsp_address});
   DISASM_INSN("sw", c_swsp, 0, {&rvc_rs2, &rvc_swsp_address});
-  DISASM_INSN("sd", c_sdsp, 0, {&rvc_rs2, &rvc_sdsp_address});
+  DISASM_INSN("fsw", c_fswsp, 0, {&rvc_rs2, &rvc_swsp_address});
   DISASM_INSN("lw", c_lw, 0, {&rvc_rs2s, &rvc_lw_address});
-  DISASM_INSN("ld", c_ld, 0, {&rvc_rs2s, &rvc_ld_address});
+  DISASM_INSN("flw", c_flw, 0, {&rvc_rs2s, &rvc_lw_address});
   DISASM_INSN("sw", c_sw, 0, {&rvc_rs2s, &rvc_lw_address});
-  DISASM_INSN("sd", c_sd, 0, {&rvc_rs2s, &rvc_ld_address});
+  DISASM_INSN("fsw", c_fsw, 0, {&rvc_rs2s, &rvc_lw_address});
   DISASM_INSN("beqz", c_beqz, 0, {&rvc_rs1s, &rvc_branch_target});
   DISASM_INSN("bnez", c_bnez, 0, {&rvc_rs1s, &rvc_branch_target});
   DISASM_INSN("j", c_j, 0, {&rvc_jump_target});