diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2019-04-29 17:36:01 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-04-29 17:36:01 +0100 |
| commit | 6000531e19964756673a5f4b694a649ef883605a (patch) | |
| tree | 8b5d4913ba1a8f1b7dd30a669b89940e196b0de6 /target/arm/translate.h | |
| parent | 6d60c67a1a03be32c3342aff6604cdc5095088d1 (diff) | |
target/arm: Activate M-profile floating point context when FPCCR.ASPEN is set
The M-profile FPCCR.ASPEN bit indicates that automatic floating-point
context preservation is enabled. Before executing any floating-point
instruction, if FPCCR.ASPEN is set and the CONTROL FPCA/SFPA bits
indicate that there is no active floating point context then we
must create a new context (by initializing FPSCR and setting
FPCA/SFPA to indicate that the context is now active). In the
pseudocode this is handled by ExecuteFPCheck().
Implement this with a new TB flag which tracks whether we
need to create a new FP context.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190416125744.27770-20-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 93abff645a..ed8ae2e7e3 100644 --- a/target/arm/translate.h +++ b/target/arm/translate.h @@ -41,6 +41,7 @@ typedef struct DisasContext { bool v8m_secure; /* true if v8M and we're in Secure mode */ 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 */ /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI * so that top level loop can generate correct syndrome information. */ |