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Set fpscr back to a known state after running generated code (64-bit mode).

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git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5615
This commit is contained in:
Julian Seward
2006-02-06 05:31:37 +00:00
parent 017ed68f63
commit eeb7eaa4e1
1 changed files with 9 additions and 13 deletions
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22
coregrind/m_dispatch/dispatch-ppc64-linux.S
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@@ -432,19 +432,15 @@ VG_(run_innerloop__dispatch_profiled):
/* We're leaving. Check that nobody messed with
VSCR or FPSCR. */
/* This check avoidance may be removable if stfiwx is
implemented. */
# if 0 //!defined(ENABLE_INNER)
/* Check FPSCR & 0xFF == 0 (lowest 8bits are controls) */
mffs 4 /* fpscr -> fpr */
li 5,144 /* => 96(parent_sp) */
stfiwx 4,5,1 /* fpr to stack */
lwzx 6,5,1 /* load to gpr */
andi. 6,6,0xFF /* mask wanted bits */
cmplwi 6,0x0 /* cmp with zero */
bne .invariant_violation /* branch if not zero */
# endif
/* Set fpscr back to a known state, since vex-generated code
may have messed with fpscr[rm]. */
li 5,0
addi 1,1,-16
stw 5,0(1)
lfs 3,0(1)
addi 1,1,16
mtfsf 0xFF,3 /* fpscr = f3 */
/* Using r11 - value used again further on, so don't trash! */
ld 11,.tocent__vgPlain_machine_ppc64_has_VMX@toc(2)
ld 11,0(11)