diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2019-04-29 17:36:02 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-04-29 17:36:02 +0100 |
| commit | e33cf0f8d8c9998a7616684f9d6aa0d181b88803 (patch) | |
| tree | 0bc446ee91b8d04c84feb3b2ef6a916e5d5bbd62 /target/arm/translate.h | |
| parent | a356dacf647506bccdf8ecd23574246a8bf615ac (diff) | |
target/arm: Implement M-profile lazy FP state preservation
The M-profile architecture floating point system supports
lazy FP state preservation, where FP registers are not
pushed to the stack when an exception occurs but are instead
only saved if and when the first FP instruction in the exception
handler is executed. Implement this in QEMU, corresponding
to the check of LSPACT in the pseudocode ExecuteFPCheck().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190416125744.27770-24-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/translate.h')
| -rw-r--r-- | target/arm/translate.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target/arm/translate.h b/target/arm/translate.h index ed8ae2e7e3..c2348def0d 100644 --- a/target/arm/translate.h +++ b/target/arm/translate.h @@ -42,6 +42,7 @@ typedef struct DisasContext { bool v8m_stackcheck; /* true if we need to perform v8M stack limit checks */ bool v8m_fpccr_s_wrong; /* true if v8M FPCCR.S != v8m_secure */ bool v7m_new_fp_ctxt_needed; /* ASPEN set but no active FP context */ + bool v7m_lspact; /* FPCCR.LSPACT set */ /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI * so that top level loop can generate correct syndrome information. */ |