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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
..
a32-uncond.decode target/arm: Convert Unallocated memory hint 2019-09-05 13:23:03 +01:00
a32.decode target/arm: Convert A32 coprocessor insns to decodetree 2020-08-24 10:02:07 +01:00
arch_dump.c target/arm: Add isar_feature_aa32_vfp_simd 2020-02-28 16:14:57 +00:00
arm_ldst.h target/arm: fetch code with translator_ld 2019-10-28 15:12:38 +00:00
arm-powerctl.c arm/arm-powerctl: rebuild hflags after setting CP15 bits in arm_set_cpu_on() 2019-12-20 14:03:00 +00:00
arm-powerctl.h target/arm/arm-powerctl: Add new arm_set_cpu_on_and_reset() 2019-02-28 11:03:04 +00:00
arm-semi.c target/arm/arm-semi: Don't let the guest close stdin/stdout/stderr 2020-01-30 16:02:01 +00:00
cpu64.c target/arm: Make '-cpu max' have a 48-bit PA 2020-10-08 21:40:01 +01:00
cpu_tcg.c target/arm: Add ID register values for Cortex-M0 2020-10-01 15:31:00 +01:00
cpu-param.h target/arm: Don't use a TLB for ARMMMUIdx_Stage2 2020-05-04 10:32:46 +01:00
cpu-qom.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cpu.c target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension 2020-10-20 16:12:01 +01:00
cpu.h target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension 2020-10-20 16:12:01 +01:00
crypto_helper.c target/arm: Split helper_crypto_sm3tt 2020-06-05 17:23:09 +01:00
debug_helper.c target/arm: Stop assuming DBGDIDR always exists 2020-02-21 16:07:01 +00:00
gdbstub64.c gdbstub: extend GByteArray to read register helpers 2020-03-17 17:38:38 +00:00
gdbstub.c target/arm: Use correct GDB XML for M-profile cores 2020-05-14 15:03:08 +01:00
helper-a64.c target/arm: Remove local definitions of float constants 2020-09-01 11:19:32 +01:00
helper-a64.h target/arm: Add helper_mte_check_zva 2020-06-26 14:31:12 +01:00
helper-sve.h target/arm: Merge helper_sve_clr_* and helper_sve_movz_* 2020-08-28 10:02:48 +01:00
helper.c target/arm: Ignore HCR_EL2.ATA when {E2H,TGE} != 11 2020-10-20 16:12:00 +01:00
helper.h target/arm: AArch32 VCVT fixed-point to float is always round-to-nearest 2020-10-20 16:12:00 +01:00
idau.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
internals.h target/arm: Ignore HCR_EL2.ATA when {E2H,TGE} != 11 2020-10-20 16:12:00 +01:00
iwmmxt_helper.c target/arm: Untabify iwmmxt_helper.c 2018-08-24 13:17:48 +01:00
kvm64.c hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
kvm_arm.h hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
kvm-consts.h target/arm: Remove no-longer-reachable 32-bit KVM code 2020-09-14 14:23:19 +01:00
kvm-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
kvm.c hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
m_helper.c target/arm: Always pass cacheattr to get_phys_addr 2020-06-26 14:31:12 +01:00
m-nocp.decode target/arm: Implement v8.1M NOCP handling 2020-10-20 16:12:01 +01:00
machine.c target/arm: Add isar_feature_aa64_fp_simd, isar_feature_aa32_vfp 2020-02-28 16:14:57 +00:00
meson.build target/arm: Remove KVM support for 32-bit Arm hosts 2020-09-14 14:23:19 +01:00
monitor.c hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
mte_helper.c target/arm: Fix reported EL for mte_check_fail 2020-10-20 16:12:00 +01:00
neon_helper.c target/arm: Convert Neon VADD, VSUB, VABD 3-reg-same insns to decodetree 2020-05-14 15:03:09 +01:00
neon-dp.decode target/arm: Convert Neon VCVT fp size field to MO_* in decode 2020-09-14 14:23:19 +01:00
neon-ls.decode target/arm: Convert Neon 'load/store single structure' to decodetree 2020-05-04 12:57:56 +01:00
neon-shared.decode target/arm: Convert VCMLA, VCADD size field to MO_* in decode 2020-09-14 14:23:19 +01:00
op_addsub.h Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
op_helper.c target/arm: Implement LDG, STG, ST2G instructions 2020-06-26 14:31:12 +01:00
pauth_helper.c target/arm: Fix AddPAC error indication 2020-08-03 17:55:03 +01:00
psci.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
sve_helper.c target/arm: Merge helper_sve_clr_* and helper_sve_movz_* 2020-08-28 10:02:48 +01:00
sve.decode target/arm: Tidy SVE tszimm shift formats 2020-08-28 10:02:49 +01:00
t16.decode target/arm: Convert T16, long branches 2019-09-05 13:23:04 +01:00
t32.decode target/arm: Implement v8.1M low-overhead-loop instructions 2020-10-20 16:12:01 +01:00
tlb_helper.c target/arm: Cache the Tagged bit for a page in MemTxAttrs 2020-06-26 14:31:12 +01:00
trace-events trace-events: Shorten file names in comments 2019-03-22 16:18:07 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
translate-a64.c target/arm/translate-a64:Remove redundant statement in disas_simd_two_reg_misc_fp16() 2020-09-01 11:57:39 +02:00
translate-a64.h target/arm: Replace A64 get_fpstatus_ptr() with generic fpstatus_ptr() 2020-08-24 10:15:11 +01:00
translate-neon.c.inc target/arm: Convert VCMLA, VCADD size field to MO_* in decode 2020-09-14 14:23:19 +01:00
translate-sve.c target/arm: Fix SVE splice 2020-10-01 15:31:00 +01:00
translate-vfp.c.inc target/arm: Implement v8.1M NOCP handling 2020-10-20 16:12:01 +01:00
translate.c target/arm: Implement v8.1M low-overhead-loop instructions 2020-10-20 16:12:01 +01:00
translate.h target/arm: Rearrange {sve,fp}_check_access assert 2020-08-28 10:02:47 +01:00
vec_helper.c target/arm/vec_helper: Add gvec fp indexed multiply-and-add operations 2020-09-01 11:45:32 +01:00
vec_internal.h target/arm: Convert aes and sm4 to gvec helpers 2020-06-05 17:23:09 +01:00
vfp_helper.c target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension 2020-10-20 16:12:01 +01:00
vfp-uncond.decode target/arm: Implement new VFP fp16 insn VMOVX 2020-09-01 11:19:32 +01:00
vfp.decode target/arm: Implement VFP fp16 VMOV between gp and halfprec registers 2020-09-01 11:19:32 +01:00