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Diffstat (limited to 'gas/config/tc-riscv.c')
-rw-r--r--gas/config/tc-riscv.c197
1 files changed, 93 insertions, 104 deletions
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index d011864..77c92cf 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -61,9 +61,10 @@ struct riscv_cl_insn
static const char default_arch[] = DEFAULT_ARCH;
-unsigned xlen = 0; /* width of an x-register */
+static unsigned xlen = 0; /* width of an x-register */
+static unsigned abi_xlen = 0; /* width of a pointer in the ABI */
-#define LOAD_ADDRESS_INSN (xlen == 64 ? "ld" : "lw")
+#define LOAD_ADDRESS_INSN (abi_xlen == 64 ? "ld" : "lw")
#define ADD32_INSN (xlen == 64 ? "addiw" : "addi")
static unsigned elf_flags = 0;
@@ -129,56 +130,49 @@ riscv_add_subset (const char *subset)
riscv_subsets = s;
}
-/* Set which ISA and extensions are available. Formally, ISA strings must
- begin with RV32 or RV64, but we allow the prefix to be omitted.
+/* Set which ISA and extensions are available. */
- FIXME: Version numbers are not supported yet. */
static void
-riscv_set_arch (const char *p)
+riscv_set_arch (const char *s)
{
- const char *all_subsets = "IMAFDC";
+ const char *all_subsets = "imafdc";
const char *extension = NULL;
- int rvc = 0;
- int i;
+ const char *p = s;
- if (strncasecmp (p, "RV32", 4) == 0)
+ if (strncmp (p, "rv32", 4) == 0)
{
xlen = 32;
p += 4;
}
- else if (strncasecmp (p, "RV64", 4) == 0)
+ else if (strncmp (p, "rv64", 4) == 0)
{
xlen = 64;
p += 4;
}
- else if (strncasecmp (p, "RV", 2) == 0)
- p += 2;
+ else
+ as_fatal ("-march=%s: ISA string must begin with rv32 or rv64", s);
- switch (TOUPPER(*p))
+ switch (*p)
{
- case 'I':
+ case 'i':
break;
- case 'G':
+ case 'g':
p++;
- /* Fall through. */
-
- case '\0':
- for (i = 0; all_subsets[i] != '\0'; i++)
+ for ( ; *all_subsets != 'c'; all_subsets++)
{
- const char subset[] = {all_subsets[i], '\0'};
+ const char subset[] = {*all_subsets, '\0'};
riscv_add_subset (subset);
}
break;
default:
- as_fatal ("`I' must be the first ISA subset name specified (got %c)",
- *p);
+ as_fatal ("-march=%s: first ISA subset must be `i' or `g'", s);
}
while (*p)
{
- if (TOUPPER(*p) == 'X')
+ if (*p == 'x')
{
char *subset = xstrdup (p), *q = subset;
@@ -187,8 +181,8 @@ riscv_set_arch (const char *p)
*q = '\0';
if (extension)
- as_fatal ("only one eXtension is supported (found %s and %s)",
- extension, subset);
+ as_fatal ("-march=%s: only one non-standard extension is supported"
+ " (found `%s' and `%s')", s, extension, subset);
extension = subset;
riscv_add_subset (subset);
p += strlen (subset);
@@ -200,24 +194,11 @@ riscv_set_arch (const char *p)
{
const char subset[] = {*p, 0};
riscv_add_subset (subset);
- if (TOUPPER(*p) == 'C')
- rvc = 1;
all_subsets++;
p++;
}
else
- as_fatal ("unsupported ISA subset %c", *p);
- }
-
- if (rvc)
- {
- /* Override -m[no-]rvc setting if C was explicitly listed. */
- riscv_set_rvc (TRUE);
- }
- else
- {
- /* Add RVC anyway. -m[no-]rvc toggles its availability. */
- riscv_add_subset ("C");
+ as_fatal ("-march=%s: unsupported ISA subset `%c'", s, *p);
}
}
@@ -604,8 +585,9 @@ void
md_begin (void)
{
int i = 0;
+ unsigned long mach = xlen == 64 ? bfd_mach_riscv64 : bfd_mach_riscv32;
- if (! bfd_set_arch_mach (stdoutput, bfd_arch_riscv, 0))
+ if (! bfd_set_arch_mach (stdoutput, bfd_arch_riscv, mach))
as_warn (_("Could not set architecture and machine"));
op_hash = hash_new ();
@@ -1717,72 +1699,46 @@ const char *md_shortopts = "O::g::G:";
enum options
{
- OPTION_M32 = OPTION_MD_BASE,
- OPTION_M64,
- OPTION_MARCH,
+ OPTION_MARCH = OPTION_MD_BASE,
OPTION_PIC,
OPTION_NO_PIC,
- OPTION_MSOFT_FLOAT,
- OPTION_MHARD_FLOAT,
- OPTION_MRVC,
- OPTION_MNO_RVC,
+ OPTION_MABI,
OPTION_END_OF_ENUM
};
struct option md_longopts[] =
{
- {"m32", no_argument, NULL, OPTION_M32},
- {"m64", no_argument, NULL, OPTION_M64},
{"march", required_argument, NULL, OPTION_MARCH},
{"fPIC", no_argument, NULL, OPTION_PIC},
{"fpic", no_argument, NULL, OPTION_PIC},
{"fno-pic", no_argument, NULL, OPTION_NO_PIC},
- {"mrvc", no_argument, NULL, OPTION_MRVC},
- {"mno-rvc", no_argument, NULL, OPTION_MNO_RVC},
- {"msoft-float", no_argument, NULL, OPTION_MSOFT_FLOAT},
- {"mhard-float", no_argument, NULL, OPTION_MHARD_FLOAT},
+ {"mabi", required_argument, NULL, OPTION_MABI},
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);
-enum float_mode
-{
- FLOAT_MODE_DEFAULT,
- FLOAT_MODE_SOFT,
- FLOAT_MODE_HARD
+enum float_abi {
+ FLOAT_ABI_DEFAULT = -1,
+ FLOAT_ABI_SOFT,
+ FLOAT_ABI_SINGLE,
+ FLOAT_ABI_DOUBLE,
+ FLOAT_ABI_QUAD
};
-static enum float_mode float_mode = FLOAT_MODE_DEFAULT;
+static enum float_abi float_abi = FLOAT_ABI_DEFAULT;
+
+static void
+riscv_set_abi (unsigned new_xlen, enum float_abi new_float_abi)
+{
+ abi_xlen = new_xlen;
+ float_abi = new_float_abi;
+}
int
md_parse_option (int c, const char *arg)
{
switch (c)
{
- case OPTION_MRVC:
- riscv_set_rvc (TRUE);
- break;
-
- case OPTION_MNO_RVC:
- riscv_set_rvc (FALSE);
- break;
-
- case OPTION_MSOFT_FLOAT:
- float_mode = FLOAT_MODE_SOFT;
- break;
-
- case OPTION_MHARD_FLOAT:
- float_mode = FLOAT_MODE_HARD;
- break;
-
- case OPTION_M32:
- xlen = 32;
- break;
-
- case OPTION_M64:
- xlen = 64;
- break;
-
case OPTION_MARCH:
riscv_set_arch (arg);
break;
@@ -1795,6 +1751,27 @@ md_parse_option (int c, const char *arg)
riscv_opts.pic = TRUE;
break;
+ case OPTION_MABI:
+ if (strcmp (arg, "ilp32") == 0)
+ riscv_set_abi (32, FLOAT_ABI_SOFT);
+ else if (strcmp (arg, "ilp32f") == 0)
+ riscv_set_abi (32, FLOAT_ABI_SINGLE);
+ else if (strcmp (arg, "ilp32d") == 0)
+ riscv_set_abi (32, FLOAT_ABI_DOUBLE);
+ else if (strcmp (arg, "ilp32q") == 0)
+ riscv_set_abi (32, FLOAT_ABI_QUAD);
+ else if (strcmp (arg, "lp64") == 0)
+ riscv_set_abi (64, FLOAT_ABI_SOFT);
+ else if (strcmp (arg, "lp64f") == 0)
+ riscv_set_abi (64, FLOAT_ABI_SINGLE);
+ else if (strcmp (arg, "lp64d") == 0)
+ riscv_set_abi (64, FLOAT_ABI_DOUBLE);
+ else if (strcmp (arg, "lp64q") == 0)
+ riscv_set_abi (64, FLOAT_ABI_QUAD);
+ else
+ return 0;
+ break;
+
default:
return 0;
}
@@ -1805,9 +1782,6 @@ md_parse_option (int c, const char *arg)
void
riscv_after_parse_args (void)
{
- if (riscv_subsets == NULL)
- riscv_set_arch ("RVIMAFD");
-
if (xlen == 0)
{
if (strcmp (default_arch, "riscv32") == 0)
@@ -1817,6 +1791,38 @@ riscv_after_parse_args (void)
else
as_bad ("unknown default architecture `%s'", default_arch);
}
+
+ if (riscv_subsets == NULL)
+ riscv_set_arch (xlen == 64 ? "rv64g" : "rv32g");
+
+ /* Add the RVC extension, regardless of -march, to support .option rvc. */
+ if (riscv_subset_supports ("c"))
+ riscv_set_rvc (TRUE);
+ else
+ riscv_add_subset ("c");
+
+ /* Infer ABI from ISA if not specified on command line. */
+ if (abi_xlen == 0)
+ abi_xlen = xlen;
+ else if (abi_xlen > xlen)
+ as_bad ("can't have %d-bit ABI on %d-bit ISA", abi_xlen, xlen);
+ else if (abi_xlen < xlen)
+ as_bad ("%d-bit ABI not yet supported on %d-bit ISA", abi_xlen, xlen);
+
+ if (float_abi == FLOAT_ABI_DEFAULT)
+ {
+ struct riscv_subset *subset;
+
+ /* Assume soft-float unless D extension is present. */
+ float_abi = FLOAT_ABI_SOFT;
+
+ for (subset = riscv_subsets; subset != NULL; subset = subset->next)
+ if (strcasecmp (subset->name, "D") == 0)
+ float_abi = FLOAT_ABI_DOUBLE;
+ }
+
+ /* Insert float_abi into the EF_RISCV_FLOAT_ABI field of elf_flags. */
+ elf_flags |= float_abi * (EF_RISCV_FLOAT_ABI & ~(EF_RISCV_FLOAT_ABI << 1));
}
long
@@ -2449,24 +2455,7 @@ tc_riscv_regname_to_dw2regnum (char *regname)
void
riscv_elf_final_processing (void)
{
- enum float_mode elf_float_mode = float_mode;
-
elf_elfheader (stdoutput)->e_flags |= elf_flags;
-
- if (elf_float_mode == FLOAT_MODE_DEFAULT)
- {
- struct riscv_subset *subset;
-
- /* Assume soft-float unless D extension is present. */
- elf_float_mode = FLOAT_MODE_SOFT;
-
- for (subset = riscv_subsets; subset != NULL; subset = subset->next)
- if (strcasecmp (subset->name, "D") == 0)
- elf_float_mode = FLOAT_MODE_HARD;
- }
-
- if (elf_float_mode == FLOAT_MODE_SOFT)
- elf_elfheader (stdoutput)->e_flags |= EF_RISCV_SOFT_FLOAT;
}
/* Parse the .sleb128 and .uleb128 pseudos. Only allow constant expressions,
generated by cgit v1.1 at 2024-07-11 03:28:49 +0000