qemu/target
Peter Maydell 8128c8e8cc target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension
If the M-profile low-overhead-branch extension is implemented, FPSCR
bits [18:16] are a new field LTPSIZE.  If MVE is not implemented
(currently always true for us) then this field always reads as 4 and
ignores writes.

These bits used to be the vector-length field for the old
short-vector extension, so we need to take care that they are not
misinterpreted as setting vec_len. We do this with a rearrangement
of the vfp_set_fpscr() code that deals with vec_len, vec_stride
and also the QC bit; this obviates the need for the M-profile
only masking step that we used to have at the start of the function.

We provide a new field in CPUState for LTPSIZE, even though this
will always be 4, in preparation for MVE, so we don't have to
come back later and split it out of the vfp.xregs[FPSCR] value.
(This state struct field will be saved and restored as part of
the FPSCR value via the vmstate_fpscr in machine.c.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201019151301.2046-11-peter.maydell@linaro.org
2020-10-20 16:12:01 +01:00
..
alpha cpu-timers, icount: new modules 2020-10-05 16:41:22 +02:00
arm target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension 2020-10-20 16:12:01 +01:00
avr qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cris qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
hppa qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
i386 * Drop ninjatool and just require ninja (Paolo) 2020-10-17 20:52:55 +01:00
lm32 qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
m68k qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
microblaze qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
mips target/mips: Increase number of TLB entries on the 34Kf core (16 -> 64) 2020-10-17 13:59:40 +02:00
moxie qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
nios2 qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
openrisc qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
ppc ppc: Fix return value in cpu_post_load() error path 2020-10-09 10:15:06 +11:00
riscv icount: rename functions to be consistent with the module name 2020-10-05 16:41:22 +02:00
rx qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
s390x disas: Enable capstone disassembly for s390x 2020-10-03 04:25:14 -05:00
sh4 qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
sparc target/sparc/int32_helper: Remove duplicated 'Tag Overflow' entry 2020-10-13 13:33:46 +02:00
tilegx qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
tricore qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
unicore32 qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
xtensa qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
meson.build meson: target 2020-08-21 06:30:35 -04:00