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target/microblaze: Move setting of float rounding mode to reset

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Although the floating point rounding mode for Microblaze is always
nearest-even, we cannot set it just once in the CPU initfn.  This is
because env->fp_status is in the part of the CPU state struct that is
zeroed on reset.

Move the call to set_float_rounding_mode() into the reset fn.

(This had no guest-visible effects because it happens that the
float_round_nearest_even enum value is 0, so when the struct was
zeroed it didn't corrupt the setting.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241025141254.2141506-18-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2024-11-05 10:09:56 +00:00
parent 8403a5015c
commit c18a13edce
1 changed files with 2 additions and 3 deletions
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5
target/microblaze/cpu.c
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@ -201,6 +201,8 @@ static void mb_cpu_reset_hold(Object *obj, ResetType type)
env->pc = cpu->cfg.base_vectors; env->pc = cpu->cfg.base_vectors;
set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
#if defined(CONFIG_USER_ONLY) #if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */ /* start in user mode with interrupts enabled. */
mb_cpu_write_msr(env, MSR_EE | MSR_IE | MSR_VM | MSR_UM); mb_cpu_write_msr(env, MSR_EE | MSR_IE | MSR_VM | MSR_UM);
@ -311,15 +313,12 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
static void mb_cpu_initfn(Object *obj) static void mb_cpu_initfn(Object *obj)
{ {
MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj); MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
CPUMBState *env = &cpu->env;
gdb_register_coprocessor(CPU(cpu), mb_cpu_gdb_read_stack_protect, gdb_register_coprocessor(CPU(cpu), mb_cpu_gdb_read_stack_protect,
mb_cpu_gdb_write_stack_protect, mb_cpu_gdb_write_stack_protect,
gdb_find_static_feature("microblaze-stack-protect.xml"), gdb_find_static_feature("microblaze-stack-protect.xml"),
0); 0);
set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
/* Inbound IRQ and FIR lines */ /* Inbound IRQ and FIR lines */
qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2); qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2);