#include "config.h"
-#ifdef RISCV_ENABLE_64BIT
-# define support_64bit 1
-#else
-# define support_64bit 0
-#endif
-
-#ifdef RISCV_ENABLE_FPU
-# define support_fp 1
-#else
-# define support_fp 0
-#endif
-
-
typedef int int128_t __attribute__((mode(TI)));
typedef unsigned int uint128_t __attribute__((mode(TI)));
typedef uint64_t freg_t;
const int OPCODE_BITS = 7;
-const int JTYPE_OPCODE_BITS = 5;
-const int GPR_BITS = 8*sizeof(reg_t);
-const int GPRID_BITS = 5;
-const int NGPR = 1 << GPRID_BITS;
+const int XPRID_BITS = 5;
+const int NXPR = 1 << XPRID_BITS;
const int FPR_BITS = 64;
const int FPRID_BITS = 5;
const int NFPR = 1 << FPRID_BITS;
const int IMM_BITS = 12;
-const int TARGET_BITS = 27;
-const int SHAMT_BITS = 6;
+const int IMMLO_BITS = 7;
+const int TARGET_BITS = 25;
const int FUNCT_BITS = 3;
const int FUNCTR_BITS = 7;
-const int FFUNCT_BITS = 5;
+const int FFUNCT_BITS = 2;
+const int RM_BITS = 3;
const int BIGIMM_BITS = 20;
const int BRANCH_ALIGN_BITS = 1;
const int JUMP_ALIGN_BITS = 1;
#define SR_ET 0x0000000000000001ULL
-#define SR_PS 0x0000000000000004ULL
-#define SR_S 0x0000000000000008ULL
-#define SR_EF 0x0000000000000010ULL
-#define SR_UX 0x0000000000000020ULL
-#define SR_SX 0x0000000000000040ULL
+#define SR_EF 0x0000000000000002ULL
+#define SR_EV 0x0000000000000004ULL
+#define SR_EC 0x0000000000000008ULL
+#define SR_PS 0x0000000000000010ULL
+#define SR_S 0x0000000000000020ULL
+#define SR_UX 0x0000000000000040ULL
+#define SR_SX 0x0000000000000080ULL
#define SR_IM 0x000000000000FF00ULL
-#define SR_ZERO ~(SR_ET | SR_PS | SR_S | SR_EF | SR_UX | SR_SX | SR_IM)
+#define SR_VM 0x0000000000010000ULL
+#define SR_ZERO ~(SR_ET|SR_EF|SR_EV|SR_EC|SR_PS|SR_S|SR_UX|SR_SX|SR_IM|SR_VM)
#define SR_IM_SHIFT 8
+#define IPI_IRQ 5
#define TIMER_IRQ 7
+#define CAUSE_EXCCODE 0x000000FF
+#define CAUSE_IP 0x0000FF00
+#define CAUSE_EXCCODE_SHIFT 0
+#define CAUSE_IP_SHIFT 8
+
#define FP_RD_NE 0
#define FP_RD_0 1
#define FP_RD_DN 2
#define FP_RD_UP 3
+#define FP_RD_NMM 4
+
#define FSR_RD_SHIFT 5
-#define FSR_RD (0x3 << FSR_RD_SHIFT)
+#define FSR_RD (0x7 << FSR_RD_SHIFT)
#define FPEXC_NX 0x01
#define FPEXC_UF 0x02
#define FPEXC_OF 0x04
-#define FPEXC_DZ 0x02
+#define FPEXC_DZ 0x08
#define FPEXC_NV 0x10
#define FSR_AEXC_SHIFT 0
// note: bit fields are in little-endian order
struct itype_t
{
- signed imm12 : IMM_BITS;
+ unsigned opcode : OPCODE_BITS;
unsigned funct : FUNCT_BITS;
- unsigned rs1 : GPRID_BITS;
- unsigned rdi : GPRID_BITS;
+ signed imm12 : IMM_BITS;
+ unsigned rs1 : XPRID_BITS;
+ unsigned rd : XPRID_BITS;
+};
+
+struct btype_t
+{
unsigned opcode : OPCODE_BITS;
+ unsigned funct : FUNCT_BITS;
+ unsigned immlo : IMMLO_BITS;
+ unsigned rs2 : XPRID_BITS;
+ unsigned rs1 : XPRID_BITS;
+ signed immhi : IMM_BITS-IMMLO_BITS;
};
struct jtype_t
{
- unsigned target : TARGET_BITS;
- unsigned jump_opcode : JTYPE_OPCODE_BITS;
+ unsigned jump_opcode : OPCODE_BITS;
+ signed target : TARGET_BITS;
};
struct rtype_t
{
- unsigned rdr : GPRID_BITS;
- unsigned functr : FUNCTR_BITS;
- unsigned funct : FUNCT_BITS;
- unsigned rs1 : GPRID_BITS;
- unsigned rs2 : GPRID_BITS;
unsigned opcode : OPCODE_BITS;
+ unsigned funct : FUNCT_BITS;
+ unsigned functr : FUNCTR_BITS;
+ unsigned rs2 : XPRID_BITS;
+ unsigned rs1 : XPRID_BITS;
+ unsigned rd : XPRID_BITS;
};
-struct btype_t
+struct ltype_t
{
- unsigned bigimm : BIGIMM_BITS;
- unsigned rdi : GPRID_BITS;
unsigned opcode : OPCODE_BITS;
+ unsigned bigimm : BIGIMM_BITS;
+ unsigned rd : XPRID_BITS;
};
struct ftype_t
{
- unsigned rdr : FPRID_BITS;
- unsigned rs3 : FPRID_BITS;
+ unsigned opcode : OPCODE_BITS;
unsigned ffunct : FFUNCT_BITS;
- unsigned rs1 : FPRID_BITS;
+ unsigned rm : RM_BITS;
+ unsigned rs3 : FPRID_BITS;
unsigned rs2 : FPRID_BITS;
- unsigned opcode : OPCODE_BITS;
+ unsigned rs1 : FPRID_BITS;
+ unsigned rd : FPRID_BITS;
};
union insn_t
jtype_t jtype;
rtype_t rtype;
btype_t btype;
+ ltype_t ltype;
ftype_t ftype;
uint32_t bits;
};
-#if 0
#include <stdio.h>
-class trace_writeback
+class do_writeback
{
public:
- trace_writeback(reg_t* _rf, int _rd) : rf(_rf), rd(_rd) {}
+ do_writeback(reg_t* _rf, int _rd) : rf(_rf), rd(_rd) {}
- reg_t operator = (reg_t rhs)
+ const do_writeback& operator = (reg_t rhs)
{
+#if 0
printf("R[%x] <= %llx\n",rd,(long long)rhs);
+#endif
rf[rd] = rhs;
- return rhs;
+ rf[0] = 0;
+ return *this;
}
+ operator reg_t() { return rf[rd]; }
+
private:
reg_t* rf;
int rd;
};
-#define do_writeback(rf,rd) trace_writeback(rf,rd)
-#else
-#define do_writeback(rf,rd) rf[rd]
-#endif
+#define throw_illegal_instruction \
+ ({ if (utmode) throw trap_vector_illegal_instruction; \
+ else throw trap_illegal_instruction; })
// helpful macros, etc
-#define RS1 R[insn.rtype.rs1]
-#define RS2 R[insn.rtype.rs2]
-#define RDR do_writeback(R,insn.rtype.rdr)
-#define RDI do_writeback(R,insn.itype.rdi)
-#define FRS1 FR[insn.ftype.rs1]
-#define FRS2 FR[insn.ftype.rs2]
-#define FRS3 FR[insn.ftype.rs3]
-#define FRDR FR[insn.ftype.rdr]
-#define FRDI FR[insn.itype.rdi]
-#define BIGIMM insn.btype.bigimm
+#define RS1 XPR[insn.rtype.rs1]
+#define RS2 XPR[insn.rtype.rs2]
+#define RD do_writeback(XPR,insn.rtype.rd)
+#define RA do_writeback(XPR,1)
+#define FRS1 FPR[insn.ftype.rs1]
+#define FRS2 FPR[insn.ftype.rs2]
+#define FRS3 FPR[insn.ftype.rs3]
+#define FRD FPR[insn.ftype.rd]
+#define BIGIMM insn.ltype.bigimm
#define SIMM insn.itype.imm12
+#define BIMM ((signed)insn.btype.immlo | (insn.btype.immhi << IMMLO_BITS))
#define SHAMT (insn.itype.imm12 & 0x3F)
#define SHAMTW (insn.itype.imm12 & 0x1F)
#define TARGET insn.jtype.target
-#define BRANCH_TARGET (npc + (SIMM << BRANCH_ALIGN_BITS))
-#define JUMP_TARGET ((npc & ~((1<<(TARGET_BITS+JUMP_ALIGN_BITS))-1)) + (TARGET << JUMP_ALIGN_BITS))
+#define BRANCH_TARGET (pc + (BIMM << BRANCH_ALIGN_BITS))
+#define JUMP_TARGET (pc + (TARGET << JUMP_ALIGN_BITS))
+#define RM ({ int rm = insn.ftype.rm; \
+ if(rm == 7) rm = (fsr & FSR_RD) >> FSR_RD_SHIFT; \
+ if(rm > 4) throw_illegal_instruction; \
+ rm; })
-#define require_supervisor if(!(sr & SR_S)) throw trap_privileged_instruction
-#define require64 if(gprlen != 64) throw trap_illegal_instruction
-#define require_fp if(!(sr & SR_EF)) throw trap_fp_disabled
-#define cmp_trunc(reg) (reg_t(reg) << (64-gprlen))
+#define require_supervisor if(unlikely(!(sr & SR_S))) throw trap_privileged_instruction
+#define xpr64 (xprlen == 64)
+#define require_xpr64 if(unlikely(!xpr64)) throw_illegal_instruction
+#define require_xpr32 if(unlikely(xpr64)) throw_illegal_instruction
+#define require_fp if(unlikely(!(sr & SR_EF))) throw trap_fp_disabled
+#define require_vector \
+ ({ if(!(sr & SR_EV)) throw trap_vector_disabled; \
+ else if (!utmode && (vecbanks_count < 3)) throw trap_vector_bank; \
+ })
+#define cmp_trunc(reg) (reg_t(reg) << (64-xprlen))
#define set_fp_exceptions ({ set_fsr(fsr | \
(softfloat_exceptionFlags << FSR_AEXC_SHIFT)); \
softfloat_exceptionFlags = 0; })
-static inline sreg_t sext32(int32_t arg)
+#define sext32(x) ((sreg_t)(int32_t)(x))
+#define zext32(x) ((reg_t)(uint32_t)(x))
+#define sext_xprlen(x) ((sreg_t(x) << (64-xprlen)) >> (64-xprlen))
+#define zext_xprlen(x) ((reg_t(x) << (64-xprlen)) >> (64-xprlen))
+
+#ifndef RISCV_ENABLE_RVC
+# define set_pc(x) \
+ do { if((x) & (sizeof(insn_t)-1)) \
+ { badvaddr = (x); throw trap_instruction_address_misaligned; } \
+ npc = (x); \
+ } while(0)
+#else
+# define set_pc(x) \
+ do { if((x) & ((sr & SR_EC) ? 1 : 3)) \
+ { badvaddr = (x); throw trap_instruction_address_misaligned; } \
+ npc = (x); \
+ } while(0)
+#endif
+
+// RVC stuff
+
+#define INSN_IS_RVC(x) (((x) & 0x3) < 0x3)
+#define insn_length(x) (INSN_IS_RVC(x) ? 2 : 4)
+#define require_rvc if(!(sr & SR_EC)) throw_illegal_instruction
+
+#define CRD_REGNUM ((insn.bits >> 5) & 0x1f)
+#define CRD do_writeback(XPR, CRD_REGNUM)
+#define CRS1 XPR[(insn.bits >> 10) & 0x1f]
+#define CRS2 XPR[(insn.bits >> 5) & 0x1f]
+#define CIMM6 ((int32_t)((insn.bits >> 10) & 0x3f) << 26 >> 26)
+#define CIMM5U ((insn.bits >> 5) & 0x1f)
+#define CIMM5 ((int32_t)CIMM5U << 27 >> 27)
+#define CIMM10 ((int32_t)((insn.bits >> 5) & 0x3ff) << 22 >> 22)
+#define CBRANCH_TARGET (pc + (CIMM5 << BRANCH_ALIGN_BITS))
+#define CJUMP_TARGET (pc + (CIMM10 << JUMP_ALIGN_BITS))
+
+static const int rvc_rs1_regmap[8] = { 20, 21, 2, 3, 4, 5, 6, 7 };
+#define rvc_rd_regmap rvc_rs1_regmap
+#define rvc_rs2b_regmap rvc_rs1_regmap
+static const int rvc_rs2_regmap[8] = { 20, 21, 2, 3, 4, 5, 6, 0 };
+#define CRDS XPR[rvc_rd_regmap[(insn.bits >> 13) & 0x7]]
+#define FCRDS FPR[rvc_rd_regmap[(insn.bits >> 13) & 0x7]]
+#define CRS1S XPR[rvc_rs1_regmap[(insn.bits >> 10) & 0x7]]
+#define CRS2S XPR[rvc_rs2_regmap[(insn.bits >> 13) & 0x7]]
+#define CRS2BS XPR[rvc_rs2b_regmap[(insn.bits >> 5) & 0x7]]
+#define FCRS2S FPR[rvc_rs2_regmap[(insn.bits >> 13) & 0x7]]
+
+// vector stuff
+#define VL vl
+
+#define UT_RS1(idx) uts[idx]->XPR[insn.rtype.rs1]
+#define UT_RS2(idx) uts[idx]->XPR[insn.rtype.rs2]
+#define UT_RD(idx) do_writeback(uts[idx]->XPR,insn.rtype.rd)
+#define UT_RA(idx) do_writeback(uts[idx]->XPR,1)
+#define UT_FRS1(idx) uts[idx]->FPR[insn.ftype.rs1]
+#define UT_FRS2(idx) uts[idx]->FPR[insn.ftype.rs2]
+#define UT_FRS3(idx) uts[idx]->FPR[insn.ftype.rs3]
+#define UT_FRD(idx) uts[idx]->FPR[insn.ftype.rd]
+#define UT_RM(idx) ((insn.ftype.rm != 7) ? insn.ftype.rm : \
+ ((uts[idx]->fsr & FSR_RD) >> FSR_RD_SHIFT))
+
+#define UT_LOOP_START for (int i=0;i<VL; i++) {
+#define UT_LOOP_END }
+#define UT_LOOP_RS1 UT_RS1(i)
+#define UT_LOOP_RS2 UT_RS2(i)
+#define UT_LOOP_RD UT_RD(i)
+#define UT_LOOP_RA UT_RA(i)
+#define UT_LOOP_FRS1 UT_FRS1(i)
+#define UT_LOOP_FRS2 UT_FRS2(i)
+#define UT_LOOP_FRS3 UT_FRS3(i)
+#define UT_LOOP_FRD UT_FRD(i)
+#define UT_LOOP_RM UT_RM(i)
+
+#define VEC_LOAD(dst, func, inc) \
+ reg_t addr = RS1; \
+ UT_LOOP_START \
+ UT_LOOP_##dst = mmu.func(addr); \
+ addr += inc; \
+ UT_LOOP_END
+
+#define VEC_STORE(src, func, inc) \
+ reg_t addr = RS1; \
+ UT_LOOP_START \
+ mmu.func(addr, UT_LOOP_##src); \
+ addr += inc; \
+ UT_LOOP_END
+
+enum vt_command_t
{
- return arg;
-}
+ vt_command_stop,
+};
#endif
projects / riscv-isa-sim.git / blobdiff