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target/arm: Reduce tests vs M-profile in cpu_get_tb_cpu_state 

Hoist the computation of some TBFLAG_A32 bits that only apply to
M-profile under a single test for ARM_FEATURE_M.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20191023150057.25731-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2019-10-23 11:00:39 -04:00 committed by Peter Maydell
parent 6e33ced563
commit 9550d1bd88
1 changed files with 23 additions and 26 deletions
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49
target/arm/helper.c
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@ -11194,6 +11194,29 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
if (arm_feature(env, ARM_FEATURE_M)) {
flags = rebuild_hflags_m32(env, fp_el, mmu_idx);
if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
FIELD_EX32(env->v7m.fpccr[M_REG_S], V7M_FPCCR, S)
!= env->v7m.secure) {
flags = FIELD_DP32(flags, TBFLAG_A32, FPCCR_S_WRONG, 1);
}
if ((env->v7m.fpccr[env->v7m.secure] & R_V7M_FPCCR_ASPEN_MASK) &&
(!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_FPCA_MASK) ||
(env->v7m.secure &&
!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_SFPA_MASK)))) {
/*
* ASPEN is set, but FPCA/SFPA indicate that there is no
* active FP context; we must create a new FP context before
* executing any FP insn.
*/
flags = FIELD_DP32(flags, TBFLAG_A32, NEW_FP_CTXT_NEEDED, 1);
}
bool is_secure = env->v7m.fpccr[M_REG_S] & R_V7M_FPCCR_S_MASK;
if (env->v7m.fpccr[is_secure] & R_V7M_FPCCR_LSPACT_MASK) {
flags = FIELD_DP32(flags, TBFLAG_A32, LSPACT, 1);
}
} else {
flags = rebuild_hflags_common_32(env, fp_el, mmu_idx, 0);
}
@ -11233,32 +11256,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
}
}
if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
FIELD_EX32(env->v7m.fpccr[M_REG_S], V7M_FPCCR, S) != env->v7m.secure) {
flags = FIELD_DP32(flags, TBFLAG_A32, FPCCR_S_WRONG, 1);
}
if (arm_feature(env, ARM_FEATURE_M) &&
(env->v7m.fpccr[env->v7m.secure] & R_V7M_FPCCR_ASPEN_MASK) &&
(!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_FPCA_MASK) ||
(env->v7m.secure &&
!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_SFPA_MASK)))) {
/*
* ASPEN is set, but FPCA/SFPA indicate that there is no active
* FP context; we must create a new FP context before executing
* any FP insn.
*/
flags = FIELD_DP32(flags, TBFLAG_A32, NEW_FP_CTXT_NEEDED, 1);
}
if (arm_feature(env, ARM_FEATURE_M)) {
bool is_secure = env->v7m.fpccr[M_REG_S] & R_V7M_FPCCR_S_MASK;
if (env->v7m.fpccr[is_secure] & R_V7M_FPCCR_LSPACT_MASK) {
flags = FIELD_DP32(flags, TBFLAG_A32, LSPACT, 1);
}
}
if (!arm_feature(env, ARM_FEATURE_M)) {
int target_el = arm_debug_target_el(env);