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authoraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-03-10 00:09:28 +0000
committeraurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>2008-03-10 00:09:28 +0000
commit5567025f5352b7177f7040f40c200c6a66aa1cd2 (patch)
tree2ea66a4b71ce89f955980529585459dcbbc1a4ff /target-ppc/op_helper.c
parent0badc1ee0e6ab8622b2f9b4ebc3c5ab96f0b58d0 (diff)
downloadhqemu-5567025f5352b7177f7040f40c200c6a66aa1cd2.zip
hqemu-5567025f5352b7177f7040f40c200c6a66aa1cd2.tar.gz
mtfsf: fix FPSCR_VX and FPSCR_FEX computation
The patch below fixes the computation of FPSCR_VX and FPSCR_FEX when using the mtfsf instruction. As stated in the PowerPC manual the mtfsf instruction can't alter those bit, and thus it should always be computed. Acked by Jocelyn Mayer. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4034 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-ppc/op_helper.c')
-rw-r--r--target-ppc/op_helper.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 1ea1695..38467c4 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -888,12 +888,16 @@ void do_store_fpscr (uint32_t mask)
/* Update VX and FEX */
if (fpscr_ix != 0)
env->fpscr |= 1 << FPSCR_VX;
+ else
+ env->fpscr &= ~(1 << FPSCR_VX);
if ((fpscr_ex & fpscr_eex) != 0) {
env->fpscr |= 1 << FPSCR_FEX;
env->exception_index = POWERPC_EXCP_PROGRAM;
/* XXX: we should compute it properly */
env->error_code = POWERPC_EXCP_FP;
}
+ else
+ env->fpscr &= ~(1 << FPSCR_FEX);
fpscr_set_rounding_mode();
}
#undef WORD0
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