diff options
| author | Alistair Francis <alistair.francis@wdc.com> | 2019-07-30 16:35:24 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-09-17 08:42:42 -0700 |
| commit | b345b48078d79ebe154a50f75e66999605abcc70 (patch) | |
| tree | 4604c04876cfd3a404a43e6028ad04751dbb7a97 /target/riscv/cpu.h | |
| parent | f14d65e8992499a179ecdf1901137ce496a0a607 (diff) | |
target/riscv: Create function to test if FP is enabled
Let's create a function that tests if floating point support is
enabled. We can then protect all floating point operations based on if
they are enabled.
This patch so far doesn't change anything, it's just preparing for the
Hypervisor support for floating point operations.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Christophe de Dinechin <dinechin@redhat.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'target/riscv/cpu.h')
| -rw-r--r-- | target/riscv/cpu.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 18d91d0920..16efe8c860 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -255,6 +255,7 @@ void riscv_cpu_do_interrupt(CPUState *cpu); int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); +bool riscv_cpu_fp_enabled(CPURISCVState *env); int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, @@ -298,7 +299,10 @@ static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, #ifdef CONFIG_USER_ONLY *flags = TB_FLAGS_MSTATUS_FS; #else - *flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS); + *flags = cpu_mmu_index(env, 0); + if (riscv_cpu_fp_enabled(env)) { + *flags |= env->mstatus & MSTATUS_FS; + } #endif } |