qemu/target/ppc/translate
Paul A. Clarke 31eb7dddac ppc: Add support for 'mffsl' instruction
ISA 3.0B added a set of Floating-Point Status and Control Register (FPSCR)
instructions: mffsce, mffscdrn, mffscdrni, mffscrn, mffscrni, mffsl.
This patch adds support for 'mffsl'.

'mffsl' is identical to 'mffs', except it only returns mode, status, and enable
bits from the FPSCR.

On CPUs without support for 'mffsl' (below ISA 3.0), the 'mffsl' instruction
will execute identically to 'mffs'.

Note: I renamed FPSCR_RN to FPSCR_RN0 so I could create an FPSCR_RN mask which
is both bits of the FPSCR rounding mode, as defined in the ISA.

I also fixed a typo in the definition of FPSCR_FR.

Signed-off-by: Paul A. Clarke <pc@us.ibm.com>

v4:
- nit: added some braces to resolve a checkpatch complaint.

v3:
- Changed tcg_gen_and_i64 to tcg_gen_andi_i64, eliminating the need for a
  temporary, per review from Richard Henderson.

v2:
- I found that I copied too much of the 'mffs' implementation.
  The 'Rc' condition code bits are not needed for 'mffsl'.  Removed.
- I now free the (renamed) 'tmask' temporary.
- I now bail early for older ISA to the original 'mffs' implementation.

Message-Id: <1565982203-11048-1-git-send-email-pc@us.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2019-08-21 17:17:39 +10:00
..
dfp-impl.inc.c target/ppc: move FP and VMX registers into aligned vsr register array 2019-01-09 09:28:14 +11:00
dfp-ops.inc.c
fp-impl.inc.c ppc: Add support for 'mffsl' instruction 2019-08-21 17:17:39 +10:00
fp-ops.inc.c ppc: Add support for 'mffsl' instruction 2019-08-21 17:17:39 +10:00
spe-impl.inc.c target/ppc: Use tcg_gen_abs_i32 2019-05-13 22:52:08 +00:00
spe-ops.inc.c
vmx-impl.inc.c target/ppc: Optimize emulation of vclzw instruction 2019-08-21 17:17:11 +10:00
vmx-ops.inc.c Changes requirement for "vsubsbs" instruction 2018-12-21 09:29:12 +11:00
vsx-impl.inc.c target/ppc: improve VSX_FMADD with new GEN_VSX_HELPER_VSX_MADD macro 2019-07-02 09:43:58 +10:00
vsx-ops.inc.c target/ppc: improve VSX_FMADD with new GEN_VSX_HELPER_VSX_MADD macro 2019-07-02 09:43:58 +10:00