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d31e2ce68d
qemu/target/arm
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Peter Maydell d31e2ce68d target/arm: Allow M-profile CPUs with FP16 to set FPSCR.FP16 
M-profile CPUs with half-precision floating point support should
be able to write to FPSCR.FZ16, but an M-profile specific masking
of the value at the top of vfp_set_fpscr() currently prevents that.
This is not yet an active bug because we have no M-profile
FP16 CPUs, but needs to be fixed before we can add any.

The bits that the masking is effectively preventing from being
set are the A-profile only short-vector Len and Stride fields,
plus the Neon QC bit. Rearrange the order of the function so
that those fields are handled earlier and only under a suitable
guard; this allows us to drop the M-profile specific masking,
making FZ16 writeable.

This change also makes the QC bit correctly RAZ/WI for older
no-Neon A-profile cores.

This refactoring also paves the way for the low-overhead-branch
LTPSIZE field, which uses some of the bits that are used for
A-profile Stride and Len.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201019151301.2046-10-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: Fix has_vfp/has_neon ID reg squashing for M-profile 2020-10-20 16:12:01 +01:00
cpu.h target/arm: Implement v8.1M branch-future insns (as NOPs) 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
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: Allow M-profile CPUs with FP16 to set FPSCR.FP16 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