diff options
| -rw-r--r-- | Changelog | 1 | ||||
| -rw-r--r-- | arm-gen.c | 131 | ||||
| -rw-r--r-- | libtcc.c | 23 | ||||
| -rw-r--r-- | tcc-doc.texi | 3 | ||||
| -rw-r--r-- | tcc.c | 2 | ||||
| -rw-r--r-- | tcc.h | 21 | ||||
| -rw-r--r-- | tccelf.c | 2 |
7 files changed, 113 insertions, 70 deletions
@@ -18,6 +18,7 @@ Features: - improved variable length array support (James Lyon) - add the possibility to use noname functions by ordinal (YX Hao) - add a install-strip target to install tcc (Thomas Preud'homme) +- add runtime selection of float ABI on ARM (Thomas Preud'homme) Platforms: - support Debian GNU/kfreeBSD 64bit userspace (Thomas Preud'homme) @@ -141,6 +141,13 @@ enum { #define ELF_START_ADDR 0x00008000 #define ELF_PAGE_SIZE 0x1000 +enum float_abi { + ARM_SOFTFP_FLOAT, + ARM_HARD_FLOAT, +}; + +enum float_abi float_abi; + /******************************************************/ #else /* ! TARGET_DEFS_ONLY */ /******************************************************/ @@ -169,7 +176,7 @@ static int leaffunc; #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP) static CType float_type, double_type, func_float_type, func_double_type; -ST_FUNC void arm_init_types(void) +ST_FUNC void arm_init(struct TCCState *s) { float_type.t = VT_FLOAT; double_type.t = VT_DOUBLE; @@ -177,12 +184,14 @@ ST_FUNC void arm_init_types(void) func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD); func_double_type.t = VT_FUNC; func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD); + + float_abi = s->float_abi; } #else #define func_float_type func_old_type #define func_double_type func_old_type #define func_ldouble_type func_old_type -ST_FUNC void arm_init_types(void) {} +ST_FUNC void arm_init(void) {} #endif static int two2mask(int a,int b) { @@ -195,6 +204,16 @@ static int regmask(int r) { /******************************************************/ +#ifdef TCC_ARM_EABI +char *default_elfinterp(struct TCCState *s) +{ + if (s->float_abi == ARM_HARD_FLOAT) + return "/lib/ld-linux-armhf.so.3"; + else + return "/lib/ld-linux.so.3"; +} +#endif + void o(uint32_t i) { /* this is a good place to start adding big-endian support*/ @@ -841,22 +860,19 @@ ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret, int *ret_align) { #ifdef TCC_ARM_EABI int size, align; size = type_size(vt, &align); -#ifdef TCC_ARM_HARDFLOAT - if (!variadic && (is_float(vt->t) || is_hgen_float_aggr(vt))) { + if (float_abi == ARM_HARD_FLOAT && !variadic && + (is_float(vt->t) || is_hgen_float_aggr(vt))) { *ret_align = 8; ret->ref = NULL; ret->t = VT_DOUBLE; return (size + 7) >> 3; - } else -#endif - if (size > 4) { - return 0; - } else { + } else if (size <= 4) { *ret_align = 4; ret->ref = NULL; ret->t = VT_INT; return 1; - } + } else + return 0; #else return 0; #endif @@ -1171,9 +1187,11 @@ void gfunc_call(int nb_args) int todo; struct plan plan; -#ifdef TCC_ARM_HARDFLOAT - variadic = (vtop[-nb_args].type.ref->c == FUNC_ELLIPSIS); - corefloat = variadic || floats_in_core_regs(&vtop[-nb_args]); +#ifdef TCC_ARM_EABI + if (float_abi == ARM_HARD_FLOAT) { + variadic = (vtop[-nb_args].type.ref->c == FUNC_ELLIPSIS); + corefloat = variadic || floats_in_core_regs(&vtop[-nb_args]); + } #endif /* cannot let cpu flags if other instruction are generated. Also avoid leaving VT_JMP anywhere except on the top of the stack because it would complicate @@ -1199,9 +1217,9 @@ void gfunc_call(int nb_args) gcall_or_jmp(0); if (args_size) gadd_sp(args_size); /* pop all parameters passed on the stack */ -#ifdef TCC_ARM_EABI -#ifdef TCC_ARM_VFP - if(corefloat && is_float(vtop->type.ref->type.t)) { +#if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP) + if(float_abi == ARM_SOFTFP_FLOAT && corefloat && + is_float(vtop->type.ref->type.t)) { if((vtop->type.ref->type.t & VT_BTYPE) == VT_FLOAT) { o(0xEE000A10); /*vmov s0, r0 */ } else { @@ -1210,7 +1228,6 @@ void gfunc_call(int nb_args) } } #endif -#endif vtop -= nb_args + 1; /* Pop all params and fct address from value stack */ leaffunc = 0; /* we are calling a function, so we aren't in a leaf function */ } @@ -1220,9 +1237,8 @@ void gfunc_prolog(CType *func_type) { Sym *sym,*sym2; int n, nf, size, align, struct_ret = 0; -#ifdef TCC_ARM_HARDFLOAT + int addr, pn, sn; /* pn=core, sn=stack */ struct avail_regs avregs = AVAIL_REGS_INITIALIZER; -#endif CType ret_type; sym = func_type->ref; @@ -1237,11 +1253,11 @@ void gfunc_prolog(CType *func_type) struct_ret = 1; func_vc = 12; /* Offset from fp of the place to store the result */ } - for(sym2=sym->next;sym2 && (n<4 || nf<16);sym2=sym2->next) { + for(sym2 = sym->next; sym2 && (n < 4 || nf < 16); sym2 = sym2->next) { size = type_size(&sym2->type, &align); -#ifdef TCC_ARM_HARDFLOAT - if (!func_var && (is_float(sym2->type.t) - || is_hgen_float_aggr(&sym2->type))) { +#ifdef TCC_ARM_EABI + if (float_abi == ARM_HARD_FLOAT && !func_var && + (is_float(sym2->type.t) || is_hgen_float_aggr(&sym2->type))) { int tmpnf = assign_vfpreg(&avregs, align, size); tmpnf += (size + 3) / 4; nf = (tmpnf > nf) ? tmpnf : nf; @@ -1270,50 +1286,49 @@ void gfunc_prolog(CType *func_type) o(0xE92D5800); /* save fp, ip, lr */ o(0xE1A0B00D); /* mov fp, sp */ func_sub_sp_offset = ind; - o(0xE1A00000); /* nop, leave space for stack adjustment in epilogue */ - { - int addr, pn = struct_ret, sn = 0; /* pn=core, sn=stack */ + o(0xE1A00000); /* nop, leave space for stack adjustment in epilog */ -#ifdef TCC_ARM_HARDFLOAT +#ifdef TCC_ARM_EABI + if (float_abi == ARM_HARD_FLOAT) { func_vc += nf * 4; avregs = AVAIL_REGS_INITIALIZER; + } #endif - while ((sym = sym->next)) { - CType *type; - type = &sym->type; - size = type_size(type, &align); - size = (size + 3) >> 2; - align = (align + 3) & ~3; -#ifdef TCC_ARM_HARDFLOAT - if (!func_var && (is_float(sym->type.t) - || is_hgen_float_aggr(&sym->type))) { - int fpn = assign_vfpreg(&avregs, align, size << 2); - if (fpn >= 0) { - addr = fpn * 4; - } else - goto from_stack; - } else + pn = struct_ret, sn = 0; + while ((sym = sym->next)) { + CType *type; + type = &sym->type; + size = type_size(type, &align); + size = (size + 3) >> 2; + align = (align + 3) & ~3; +#ifdef TCC_ARM_EABI + if (float_abi == ARM_HARD_FLOAT && !func_var && (is_float(sym->type.t) + || is_hgen_float_aggr(&sym->type))) { + int fpn = assign_vfpreg(&avregs, align, size << 2); + if (fpn >= 0) + addr = fpn * 4; + else + goto from_stack; + } else #endif - if (pn < 4) { + if (pn < 4) { #ifdef TCC_ARM_EABI pn = (pn + (align-1)/4) & -(align/4); #endif - addr = (nf + pn) * 4; - pn += size; - if (!sn && pn > 4) - sn = (pn - 4); - } else { -#ifdef TCC_ARM_HARDFLOAT + addr = (nf + pn) * 4; + pn += size; + if (!sn && pn > 4) + sn = (pn - 4); + } else { from_stack: -#endif #ifdef TCC_ARM_EABI sn = (sn + (align-1)/4) & -(align/4); #endif - addr = (n + nf + sn) * 4; - sn += size; - } - sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | lvalue_type(type->t), addr+12); + addr = (n + nf + sn) * 4; + sn += size; } + sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | lvalue_type(type->t), + addr + 12); } last_itod_magic=0; leaffunc = 1; @@ -1327,12 +1342,8 @@ void gfunc_epilog(void) int diff; /* Copy float return value to core register if base standard is used and float computation is made with VFP */ -#ifdef TCC_ARM_EABI - if ( -#ifdef TCC_ARM_HARDFLOAT - func_var && -#endif - is_float(func_vt.t)) { +#if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP) + if ((float_abi == ARM_SOFTFP_FLOAT || func_var) && is_float(func_vt.t)) { if((func_vt.t & VT_BTYPE) == VT_FLOAT) o(0xEE100A10); /* fmrs r0, s0 */ else { @@ -757,7 +757,7 @@ static int tcc_compile(TCCState *s1) func_old_type.t = VT_FUNC; func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD); #ifdef TCC_TARGET_ARM - arm_init_types(); + arm_init(s1); #endif #if 0 @@ -945,9 +945,12 @@ LIBTCCAPI TCCState *tcc_new(void) tcc_define_symbol(s, "__ARMEL__", NULL); #if defined(TCC_ARM_EABI) tcc_define_symbol(s, "__ARM_EABI__", NULL); +#endif #if defined(TCC_ARM_HARDFLOAT) + s->float_abi = ARM_HARD_FLOAT; tcc_define_symbol(s, "__ARM_PCS_VFP", NULL); -#endif +#else + s->float_abi = ARM_SOFTFP_FLOAT; #endif #endif @@ -1628,6 +1631,7 @@ enum { TCC_OPTION_b, TCC_OPTION_g, TCC_OPTION_c, + TCC_OPTION_float_abi, TCC_OPTION_static, TCC_OPTION_shared, TCC_OPTION_soname, @@ -1680,6 +1684,9 @@ static const TCCOption tcc_options[] = { #endif { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP }, { "c", TCC_OPTION_c, 0 }, +#ifdef TCC_TARGET_ARM + { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG }, +#endif { "static", TCC_OPTION_static, 0 }, { "shared", TCC_OPTION_shared, 0 }, { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG }, @@ -1817,6 +1824,18 @@ PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv) case TCC_OPTION_c: s->output_type = TCC_OUTPUT_OBJ; break; +#ifdef TCC_TARGET_ARM + case TCC_OPTION_float_abi: + /* tcc doesn't support soft float yet */ + if (!strcmp(optarg, "softfp")) { + s->float_abi = ARM_SOFTFP_FLOAT; + tcc_undefine_symbol(s, "__ARM_PCS_VFP"); + } else if (!strcmp(optarg, "hard")) + s->float_abi = ARM_HARD_FLOAT; + else + tcc_error("unsupported float abi '%s'", optarg); + break; +#endif case TCC_OPTION_static: s->static_link = 1; break; diff --git a/tcc-doc.texi b/tcc-doc.texi index 540b4b6..e8832f6 100644 --- a/tcc-doc.texi +++ b/tcc-doc.texi @@ -176,6 +176,9 @@ In a script, it gives the following header: #!/usr/local/bin/tcc -run -L/usr/X11R6/lib -lX11 @end example +@item -mfloat-abi (ARM only) +Select the float ABI. Possible values: @code{softfp} and @code{hard} + @item -dumpversion Print only the compiler version and nothing else. @@ -224,7 +224,7 @@ static void display_info(TCCState *s, int what) print_paths("crt", s->crt_paths, s->nb_crt_paths); print_paths("libraries", s->library_paths, s->nb_library_paths); print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths); - printf("elfinterp:\n %s\n", CONFIG_TCC_ELFINTERP); + printf("elfinterp:\n %s\n", DEFAULT_ELFINTERP(s)); break; } } @@ -221,21 +221,24 @@ # endif # elif defined __GNU__ # define CONFIG_TCC_ELFINTERP "/lib/ld.so" -# elif defined TCC_ARM_HARDFLOAT -# define CONFIG_TCC_ELFINTERP "/lib/ld-linux-armhf.so.3" -# elif defined TCC_ARM_EABI -# define CONFIG_TCC_ELFINTERP "/lib/ld-linux.so.3" # elif defined(TCC_TARGET_X86_64) # define CONFIG_TCC_ELFINTERP "/lib64/ld-linux-x86-64.so.2" # elif defined(TCC_UCLIBC) # define CONFIG_TCC_ELFINTERP "/lib/ld-uClibc.so.0" # elif defined(TCC_TARGET_PE) # define CONFIG_TCC_ELFINTERP "-" -# else +# elif !defined(TCC_ARM_EABI) # define CONFIG_TCC_ELFINTERP "/lib/ld-linux.so.2" # endif #endif +/* var elf_interp dans *-gen.c */ +#ifdef CONFIG_TCC_ELFINTERP +# define DEFAULT_ELFINTERP(s) CONFIG_TCC_ELFINTERP +#else +# define DEFAULT_ELFINTERP(s) default_elfinterp(s) +#endif + /* library to use with CONFIG_USE_LIBGCC instead of libtcc1.a */ #define TCC_LIBGCC USE_MUADIR(CONFIG_SYSROOT "/" CONFIG_LDDIR) "/libgcc_s.so.1" @@ -561,6 +564,9 @@ struct TCCState { /* compile with built-in memory and bounds checker */ int do_bounds_check; #endif +#ifdef TCC_TARGET_ARM + enum float_abi float_abi; /* float ABI of the generated code*/ +#endif addr_t text_addr; /* address of text section */ int has_text_addr; @@ -1329,7 +1335,10 @@ ST_FUNC void gen_opl(int op); /* ------------ arm-gen.c ------------ */ #ifdef TCC_TARGET_ARM -ST_FUNC void arm_init_types(void); +#ifdef TCC_ARM_EABI +ST_FUNC char *default_elfinterp(struct TCCState *s); +#endif +ST_FUNC void arm_init(struct TCCState *s); ST_FUNC uint32_t encbranch(int pos, int addr, int fail); ST_FUNC void gen_cvt_itof1(int t); #endif @@ -1592,7 +1592,7 @@ static int elf_output_file(TCCState *s1, const char *filename) /* allow override the dynamic loader */ const char *elfint = getenv("LD_SO"); if (elfint == NULL) - elfint = CONFIG_TCC_ELFINTERP; + elfint = DEFAULT_ELFINTERP(s1); /* add interpreter section only if executable */ interp = new_section(s1, ".interp", SHT_PROGBITS, SHF_ALLOC); interp->sh_addralign = 1; |