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target/microblaze: Split out MSR[C] to its own variable

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Having the MSR[C] bit separate will improve arithmetic that operates
on the carry bit.  Having mb_cpu_read_msr() populate MSR[CC] will
prevent the carry copy not matching the carry bit.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-18 11:58:23 -07:00
parent 480d29a8fa
commit 1074c0fb91
6 changed files with 82 additions and 96 deletions
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4
target/microblaze/cpu.c
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@ -121,9 +121,9 @@ static void mb_cpu_reset(DeviceState *dev)
#if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */
env->msr = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
mb_cpu_write_msr(env, MSR_EE | MSR_IE | MSR_VM | MSR_UM);
#else
env->msr = 0;
mb_cpu_write_msr(env, 0);
mmu_init(&env->mmu);
env->mmu.c_mmu = 3;
env->mmu.c_mmu_tlb_access = 3;