diff options
| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-05-20 13:27:58 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-05-20 13:27:58 +0000 |
| commit | 3a5b360dac4ce1900e1cb19b7ad870086936869c (patch) | |
| tree | 5ad839cda6d78ab709b2416ba4b0da7e5c4d5cbd /target-mips/op_helper.c | |
| parent | 5f30d62c261e0808e3135a3c75beb761f4d2a1c9 (diff) | |
Catch more MIPS FPU cornercases, fix addr.ps and mulr.ps instructions.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2841 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-mips/op_helper.c')
| -rw-r--r-- | target-mips/op_helper.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c index 9a0ffee9a..9092ffc39 100644 --- a/target-mips/op_helper.c +++ b/target-mips/op_helper.c @@ -975,13 +975,25 @@ FLOAT_OP(name, d) \ { \ set_float_exception_flags(0, &env->fp_status); \ FDT2 = float64_ ## name (FDT0, FDT1, &env->fp_status); \ - update_fcr31(); \ + update_fcr31(); \ + if (GET_FP_CAUSE(env->fcr31) & FP_INVALID) \ + FDT2 = 0x7ff7ffffffffffffULL; \ + else if (GET_FP_CAUSE(env->fcr31) & FP_UNDERFLOW) { \ + if ((env->fcr31 & 0x3) == 0) \ + FDT2 &= 0x8000000000000000ULL; \ + } \ } \ FLOAT_OP(name, s) \ { \ set_float_exception_flags(0, &env->fp_status); \ FST2 = float32_ ## name (FST0, FST1, &env->fp_status); \ - update_fcr31(); \ + update_fcr31(); \ + if (GET_FP_CAUSE(env->fcr31) & FP_INVALID) \ + FST2 = 0x7fbfffff; \ + else if (GET_FP_CAUSE(env->fcr31) & FP_UNDERFLOW) { \ + if ((env->fcr31 & 0x3) == 0) \ + FST2 &= 0x80000000ULL; \ + } \ } \ FLOAT_OP(name, ps) \ { \ @@ -989,6 +1001,15 @@ FLOAT_OP(name, ps) \ FST2 = float32_ ## name (FST0, FST1, &env->fp_status); \ FSTH2 = float32_ ## name (FSTH0, FSTH1, &env->fp_status); \ update_fcr31(); \ + if (GET_FP_CAUSE(env->fcr31) & FP_INVALID) { \ + FST2 = 0x7fbfffff; \ + FSTH2 = 0x7fbfffff; \ + } else if (GET_FP_CAUSE(env->fcr31) & FP_UNDERFLOW) { \ + if ((env->fcr31 & 0x3) == 0) { \ + FST2 &= 0x80000000ULL; \ + FSTH2 &= 0x80000000ULL; \ + } \ + } \ } FLOAT_BINOP(add) FLOAT_BINOP(sub) |