tinycc/riscv64-gen.c

#ifdef TARGET_DEFS_ONLY

// Number of registers available to allocator:
#define NB_REGS 16 // x10-x17 aka a0-a7, f10-f17 aka fa0-fa7

#define TREG_R(x) (x) // x = 0..7
#define TREG_F(x) (x + 10) // x = 0..7

// Register classes sorted from more general to more precise:
#define RC_INT (1 << 0)
#define RC_FLOAT (1 << 1)
#define RC_R(x) (1 << (2 + (x))) // x = 0..7
#define RC_F(x) (1 << (10 + (x))) // x = 0..7

#define RC_IRET (RC_R(0)) // int return register class
#define RC_FRET (RC_F(0)) // float return register class

#define REG_IRET (TREG_R(0)) // int return register number
#define REG_FRET (TREG_F(0)) // float return register number

#define PTR_SIZE 8

#define LDOUBLE_SIZE 16
#define LDOUBLE_ALIGN 16

#define MAX_ALIGN 16

#define CHAR_IS_UNSIGNED

#else
#include "tcc.h"

ST_DATA const int reg_classes[NB_REGS] = {
  RC_INT | RC_R(0),
  RC_INT | RC_R(1),
  RC_INT | RC_R(2),
  RC_INT | RC_R(3),
  RC_INT | RC_R(4),
  RC_INT | RC_R(5),
  RC_INT | RC_R(6),
  RC_INT | RC_R(7),
  RC_FLOAT | RC_F(0),
  RC_FLOAT | RC_F(1),
  RC_FLOAT | RC_F(2),
  RC_FLOAT | RC_F(3),
  RC_FLOAT | RC_F(4),
  RC_FLOAT | RC_F(5),
  RC_FLOAT | RC_F(6),
  RC_FLOAT | RC_F(7)
};

// Patch all branches in list pointed to by t to branch to a:
ST_FUNC void gsym_addr(int t_, int a_)
{
    uint32_t t = t_;
    uint32_t a = a_;
    tcc_error("implement me");
    while (t) {
        unsigned char *ptr = cur_text_section->data + t;
        uint32_t next = read32le(ptr);
        if (a - t + 0x8000000 >= 0x10000000)
            tcc_error("branch out of range");
        write32le(ptr, (a - t == 4 ? 0xd503201f : // nop
                        0x14000000 | ((a - t) >> 2 & 0x3ffffff))); // b
        t = next;
    }
}

ST_FUNC void load(int r, SValue *sv)
{
    tcc_error("implement me");
}

ST_FUNC void store(int r, SValue *sv)
{
    tcc_error("implement me");
}

ST_FUNC void gfunc_call(int nb_args)
{
    tcc_error("implement me");
}
ST_FUNC void gfunc_prolog(CType *func_type)
{
    tcc_error("implement me");
}
ST_FUNC void gen_va_start(void)
{
    tcc_error("implement me");
}
ST_FUNC void gen_va_arg(CType *t)
{
    tcc_error("implement me");
}
ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret,
                       int *align, int *regsize)
{
    tcc_error("implement me");
}
ST_FUNC void gfunc_return(CType *func_type)
{
    tcc_error("implement me");
}
ST_FUNC void gfunc_epilog(void)
{
    tcc_error("implement me");
}
ST_FUNC void gen_fill_nops(int bytes)
{
    tcc_error("implement me");
    if ((bytes & 3))
      tcc_error("alignment of code section not multiple of 4");
}

// Generate forward branch to label:
ST_FUNC int gjmp(int t)
{
    tcc_error("implement me");
}

// Generate branch to known address:
ST_FUNC void gjmp_addr(int a)
{
    tcc_error("implement me");
}

ST_FUNC int gjmp_cond(int op, int t)
{
    tcc_error("implement me");
}

ST_FUNC int gjmp_append(int n, int t)
{
    tcc_error("implement me");
}

ST_FUNC int gtst(int inv, int t)
{
    tcc_error("implement me");
}
ST_FUNC void gen_opi(int op)
{
    tcc_error("implement me");
}

ST_FUNC void gen_opl(int op)
{
    tcc_error("implement me");
}

ST_FUNC void gen_opf(int op)
{
    tcc_error("implement me");
}
ST_FUNC void gen_cvt_sxtw(void)
{
    tcc_error("implement me");
}

ST_FUNC void gen_cvt_itof(int t)
{
    tcc_error("implement me");
}

ST_FUNC void gen_cvt_ftoi(int t)
{
    tcc_error("implement me");
}

ST_FUNC void gen_cvt_ftof(int t)
{
    tcc_error("implement me");
}

ST_FUNC void ggoto(void)
{
    tcc_error("implement me");
}
ST_FUNC void gen_vla_sp_save(int addr)
{
    tcc_error("implement me");
}

ST_FUNC void gen_vla_sp_restore(int addr)
{
    tcc_error("implement me");
}

ST_FUNC void gen_vla_alloc(CType *type, int align)
{
    tcc_error("implement me");
}
#endif