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tinyriscv-openocd
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Expose FPRs as single and double for F and D. (#465) 

If a hart support both F and D, then expose the FPRs as a union of float
and double. Fixes #336.

Change-Id: I3d4503bbf9281d6380c51259388cd01d399b94d6
regcache
Tim Newsome 2020-04-10 13:32:12 -07:00 committed by GitHub
parent cbb15587dc
commit 464407cfd2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 1 deletions
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18
src/target/riscv/riscv.c
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@ -3528,6 +3528,19 @@ int riscv_init_registers(struct target *target)
/* These types are built into gdb. */ /* These types are built into gdb. */
static struct reg_data_type type_ieee_single = { .type = REG_TYPE_IEEE_SINGLE, .id = "ieee_single" }; static struct reg_data_type type_ieee_single = { .type = REG_TYPE_IEEE_SINGLE, .id = "ieee_single" };
static struct reg_data_type type_ieee_double = { .type = REG_TYPE_IEEE_DOUBLE, .id = "ieee_double" }; static struct reg_data_type type_ieee_double = { .type = REG_TYPE_IEEE_DOUBLE, .id = "ieee_double" };
static struct reg_data_type_union_field single_double_fields[] = {
{"float", &type_ieee_single, single_double_fields + 1},
{"double", &type_ieee_double, NULL},
};
static struct reg_data_type_union single_double_union = {
.fields = single_double_fields
};
static struct reg_data_type type_ieee_single_double = {
.type = REG_TYPE_ARCH_DEFINED,
.id = "FPU_FD",
.type_class = REG_TYPE_CLASS_UNION,
.reg_type_union = &single_double_union
};
static struct reg_data_type type_uint8 = { .type = REG_TYPE_UINT8, .id = "uint8" }; static struct reg_data_type type_uint8 = { .type = REG_TYPE_UINT8, .id = "uint8" };
static struct reg_data_type type_uint16 = { .type = REG_TYPE_UINT16, .id = "uint16" }; static struct reg_data_type type_uint16 = { .type = REG_TYPE_UINT16, .id = "uint16" };
static struct reg_data_type type_uint32 = { .type = REG_TYPE_UINT32, .id = "uint32" }; static struct reg_data_type type_uint32 = { .type = REG_TYPE_UINT32, .id = "uint32" };
@ -3770,8 +3783,11 @@ int riscv_init_registers(struct target *target)
} else if (number >= GDB_REGNO_FPR0 && number <= GDB_REGNO_FPR31) { } else if (number >= GDB_REGNO_FPR0 && number <= GDB_REGNO_FPR31) {
r->caller_save = true; r->caller_save = true;
if (riscv_supports_extension(target, hartid, 'D')) { if (riscv_supports_extension(target, hartid, 'D')) {
r->reg_data_type = &type_ieee_double;
r->size = 64; r->size = 64;
if (riscv_supports_extension(target, hartid, 'F'))
r->reg_data_type = &type_ieee_single_double;
else
r->reg_data_type = &type_ieee_double;
} else if (riscv_supports_extension(target, hartid, 'F')) { } else if (riscv_supports_extension(target, hartid, 'F')) {
r->reg_data_type = &type_ieee_single; r->reg_data_type = &type_ieee_single;
r->size = 32; r->size = 32;