From 70dae0d069c45250bbefd9424089383a8ac239de Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sat, 8 Feb 2020 12:58:05 +0000 Subject: target/arm: Remove CPSR_RESERVED The only remaining use was in op_helper.c. Use PSTATE_SS directly, and move the commentary so that it is more obvious what is going on. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell Message-id: 20200208125816.14954-10-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/op_helper.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'target/arm/op_helper.c') diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c index acf1815ea3..af3020b78f 100644 --- a/target/arm/op_helper.c +++ b/target/arm/op_helper.c @@ -387,7 +387,14 @@ void HELPER(exception_bkpt_insn)(CPUARMState *env, uint32_t syndrome) uint32_t HELPER(cpsr_read)(CPUARMState *env) { - return cpsr_read(env) & ~(CPSR_EXEC | CPSR_RESERVED); + /* + * We store the ARMv8 PSTATE.SS bit in env->uncached_cpsr. + * This is convenient for populating SPSR_ELx, but must be + * hidden from aarch32 mode, where it is not visible. + * + * TODO: ARMv8.4-DIT -- need to move SS somewhere else. + */ + return cpsr_read(env) & ~(CPSR_EXEC | PSTATE_SS); } void HELPER(cpsr_write)(CPUARMState *env, uint32_t val, uint32_t mask) -- cgit v1.2.3