const int NXPR = 32;
const int NFPR = 32;
+#define X_RA 1
+#define X_SP 2
+
#define FP_RD_NE 0
#define FP_RD_0 1
#define FP_RD_DN 2
((x) & 0x1f) < 0x1f ? 4 : \
((x) & 0x3f) < 0x3f ? 6 : \
8)
+#define MAX_INSN_LENGTH 8
+#define PC_ALIGN 2
typedef uint64_t insn_bits_t;
class insn_t
uint64_t rs3() { return x(27, 5); }
uint64_t rm() { return x(12, 3); }
uint64_t csr() { return x(20, 12); }
+
+ int64_t rvc_imm() { return x(2, 5) + (xs(12, 1) << 5); }
+ int64_t rvc_zimm() { return x(2, 5) + (x(12, 1) << 5); }
+ int64_t rvc_addi4spn_imm() { return (x(6, 1) << 2) + (x(5, 1) << 3) + (x(11, 2) << 4) + (x(7, 4) << 6); }
+ int64_t rvc_addi16sp_imm() { return (x(6, 1) << 4) + (x(5, 1) << 5) + (x(2, 3) << 6) + (xs(12, 1) << 9); }
+ int64_t rvc_lwsp_imm() { return (x(4, 3) << 2) + (x(12, 1) << 5) + (x(2, 2) << 6); }
+ int64_t rvc_ldsp_imm() { return (x(5, 2) << 3) + (x(12, 1) << 5) + (x(2, 3) << 6); }
+ int64_t rvc_swsp_imm() { return (x(9, 4) << 2) + (x(7, 2) << 6); }
+ int64_t rvc_sdsp_imm() { return (x(10, 3) << 3) + (x(7, 3) << 6); }
+ int64_t rvc_lw_imm() { return (x(6, 1) << 2) + (x(10, 3) << 3) + (x(5, 1) << 6); }
+ int64_t rvc_lb_imm() { return (x(12, 1) + (x(5, 2) << 1) + (x(10, 2) << 3)); }
+ int64_t rvc_ld_imm() { return (x(10, 3) << 3) + (x(5, 2) << 6); }
+ int64_t rvc_j_imm() { return (x(3, 4) << 1) + (x(2, 1) << 5) + (xs(7, 6) << 6); }
+ int64_t rvc_b_imm() { return (x(3, 4) << 1) + (x(2, 1) << 5) + (xs(10, 3) << 6); }
+ int64_t rvc_simm3() { return x(10, 3); }
+ uint64_t rvc_rd() { return rd(); }
+ uint64_t rvc_rs1() { return rd(); }
+ uint64_t rvc_rs2() { return x(2, 5); }
+ uint64_t rvc_rs1s() { return 8 + x(7, 3); }
+ uint64_t rvc_rs2s() { return 8 + x(2, 3); }
private:
insn_bits_t b;
uint64_t x(int lo, int len) { return (b >> lo) & ((insn_bits_t(1) << len)-1); }
// helpful macros, etc
#define MMU (*p->get_mmu())
#define STATE (*p->get_state())
-#define RS1 STATE.XPR[insn.rs1()]
-#define RS2 STATE.XPR[insn.rs2()]
-#define WRITE_RD(value) STATE.XPR.write(insn.rd(), value)
-
-#ifdef RISCV_ENABLE_COMMITLOG
- #undef WRITE_RD
- #define WRITE_RD(value) ({ \
- reg_t wdata = value; /* value is a func with side-effects */ \
- STATE.log_reg_write = (commit_log_reg_t){insn.rd() << 1, wdata}; \
- STATE.XPR.write(insn.rd(), wdata); \
- })
+#define READ_REG(reg) STATE.XPR[reg]
+#define RS1 READ_REG(insn.rs1())
+#define RS2 READ_REG(insn.rs2())
+#define WRITE_RD(value) WRITE_REG(insn.rd(), value)
+
+#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_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
#define FRS1 STATE.FPR[insn.rs1()]
#define FRS2 STATE.FPR[insn.rs2()]
#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())
#define get_field(reg, mask) (((reg) & (decltype(reg))(mask)) / ((mask) & ~((mask) << 1)))
#define set_field(reg, mask, val) (((reg) & ~(decltype(reg))(mask)) | (((decltype(reg))(val) * ((mask) & ~((mask) << 1))) & (decltype(reg))(mask)))
-#define require_privilege(p) if (get_field(STATE.mstatus, MSTATUS_PRV) < (p)) throw trap_illegal_instruction()
-#define require_rv64 if(unlikely(xlen != 64)) throw trap_illegal_instruction()
-#define require_rv32 if(unlikely(xlen != 32)) throw trap_illegal_instruction()
-#define require_fp if (unlikely((STATE.mstatus & MSTATUS_FS) == 0)) throw trap_illegal_instruction()
-#define require_accelerator if (unlikely((STATE.mstatus & MSTATUS_XS) == 0)) throw trap_illegal_instruction()
+#define require(x) if (unlikely(!(x))) throw trap_illegal_instruction()
+#define require_privilege(p) require(get_field(STATE.mstatus, MSTATUS_PRV) >= (p))
+#define require_rv64 require(xlen == 64)
+#define require_rv32 require(xlen == 32)
+#define require_extension(s) require(p->supports_extension(s))
+#define require_fp require((STATE.mstatus & MSTATUS_FS) != 0)
+#define require_accelerator require((STATE.mstatus & MSTATUS_XS) != 0)
-#define cmp_trunc(reg) (reg_t(reg) << (64-xlen))
#define set_fp_exceptions ({ STATE.fflags |= softfloat_exceptionFlags; \
softfloat_exceptionFlags = 0; })
#define zext_xlen(x) (((reg_t)(x) << (64-xlen)) >> (64-xlen))
#define set_pc(x) \
- do { if ((x) & 3 /* For now... */) \
+ do { if (unlikely(((x) & 2)) && !p->supports_extension('C')) \
throw trap_instruction_address_misaligned(x); \
npc = sext_xlen(x); \
} while(0)
+#define PC_SERIALIZE 3 /* sentinel value indicating simulator pipeline flush */
+
#define validate_csr(which, write) ({ \
+ if (!STATE.serialized) return PC_SERIALIZE; \
+ STATE.serialized = false; \
unsigned my_priv = get_field(STATE.mstatus, MSTATUS_PRV); \
unsigned csr_priv = get_field((which), 0x300); \
unsigned csr_read_only = get_field((which), 0xC00) == 3; \
projects / riscv-isa-sim.git / blobdiff