svn commit: r350181 - head/sys/powerpc/booke

[Justin Hibbits]

Author: jhibbits
Date: Sat Jul 20 18:22:01 2019
New Revision: 350181
URL: https://svnweb.freebsd.org/changeset/base/350181

Log:
  powerpc/SPE: Enable SPV bit for EFSCFD instruction emulation
  
  EFSCFD (floating point single convert from double) emulation requires saving
  the high word of the register, which uses SPE instructions.  Enable the SPE
  to avoid an SPV Unavailable exception.
  
  MFC after:	1 week

Modified:
  head/sys/powerpc/booke/spe.c

Modified: head/sys/powerpc/booke/spe.c
==============================================================================
--- head/sys/powerpc/booke/spe.c	Sat Jul 20 17:42:46 2019	(r350180)
+++ head/sys/powerpc/booke/spe.c	Sat Jul 20 18:22:01 2019	(r350181)
@@ -572,6 +572,7 @@ spe_handle_fpdata(struct trapframe *frame)
 			frame->fixreg[rd] = frame->fixreg[ra] ^ (1U << 31);
 			break;
 		case EFSCFD:
+			mtmsr(msr | PSL_VEC);
 			spe_explode(&fpemu, &fpemu.fe_f3, DOUBLE,
 			    spe_save_reg_high(rb), frame->fixreg[rb]);
 			result = &fpemu.fe_f3;