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| author | Peter Maydell <peter.maydell@linaro.org> | 2024-12-11 15:31:03 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2024-12-11 15:31:03 +0000 |
| commit | ca81533e94c81838fa05bb8ba7a8a6708e4dca99 (patch) | |
| tree | a37bced42fbe1a074c7747d163733f05198d7066 | |
| parent | b1969a5dd4ad72669d739ef6e8caaefb7c7f962c (diff) | |
| download | qemu-ca81533e94c81838fa05bb8ba7a8a6708e4dca99.zip qemu-ca81533e94c81838fa05bb8ba7a8a6708e4dca99.tar.gz qemu-ca81533e94c81838fa05bb8ba7a8a6708e4dca99.tar.bz2 | |
target/m68k: Init local float_status from env fp_status in gdb get/set reg
In cf_fpu_gdb_get_reg() and cf_fpu_gdb_set_reg() we do the conversion
from float64 to floatx80 using a scratch float_status, because we
don't want the conversion to affect the CPU's floating point exception
status. Currently we use a zero-initialized float_status. This will
get steadily more awkward as we add config knobs to float_status
that the target must initialize. Avoid having to add any of that
configuration here by instead initializing our local float_status
from the env->fp_status.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-32-peter.maydell@linaro.org
| -rw-r--r-- | target/m68k/helper.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/target/m68k/helper.c b/target/m68k/helper.c index 9bfc6ae..beefeb7 100644 --- a/target/m68k/helper.c +++ b/target/m68k/helper.c @@ -36,7 +36,8 @@ static int cf_fpu_gdb_get_reg(CPUState *cs, GByteArray *mem_buf, int n) CPUM68KState *env = &cpu->env; if (n < 8) { - float_status s = {}; + /* Use scratch float_status so any exceptions don't change CPU state */ + float_status s = env->fp_status; return gdb_get_reg64(mem_buf, floatx80_to_float64(env->fregs[n].d, &s)); } switch (n) { @@ -56,7 +57,8 @@ static int cf_fpu_gdb_set_reg(CPUState *cs, uint8_t *mem_buf, int n) CPUM68KState *env = &cpu->env; if (n < 8) { - float_status s = {}; + /* Use scratch float_status so any exceptions don't change CPU state */ + float_status s = env->fp_status; env->fregs[n].d = float64_to_floatx80(ldq_be_p(mem_buf), &s); return 8; } |