From: Tom Musta Date: Mon, 31 Mar 2014 21:03:56 +0000 (-0500) Subject: target-ppc: Bug: VSX Convert to Integer Should Truncate X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0453099b7d20c9fc2946ed74f1d965ae4d173d19;p=qemu.git target-ppc: Bug: VSX Convert to Integer Should Truncate The various VSX Convert to Integer instructions should truncate the floating point number to an integer value, which is equivalent to a round-to-zero rounding mode. The existing VSX floating point to integer conversion helpers are erroneously using the rounding mode set int the PowerPC Floating Point Status and Control Register (FPSCR). This change corrects this defect by using the appropriate float*_to_*_round_to_zero() routines fro the softfloat library. Signed-off-by: Tom Musta Tested-by: Tom Musta Signed-off-by: Alexander Graf --- diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c index fd91239d37..691d5724ed 100644 --- a/target-ppc/fpu_helper.c +++ b/target-ppc/fpu_helper.c @@ -2568,7 +2568,8 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \ fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXCVI, 0); \ xt.tfld = rnan; \ } else { \ - xt.tfld = stp##_to_##ttp(xb.sfld, &env->fp_status); \ + xt.tfld = stp##_to_##ttp##_round_to_zero(xb.sfld, \ + &env->fp_status); \ if (env->fp_status.float_exception_flags & float_flag_invalid) { \ fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXCVI, 0); \ } \