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unicorn/qemu/target/arm
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Peter Maydell d350644817 target/arm: AArch32 VCVT fixed-point to float is always round-to-nearest 
For AArch32, unlike the VCVT of integer to float, which honours the
rounding mode specified by the FPSCR, VCVT of fixed-point to float is
always round-to-nearest. (AArch64 fixed-point-to-float conversions
always honour the FPCR rounding mode.)

Implement this by providing _round_to_nearest versions of the
relevant helpers which set the rounding mode temporarily when making
the call to the underlying softfloat function.

We only need to change the VFP VCVT instructions, because the
standard- FPSCR value used by the Neon VCVT is always set to
round-to-nearest, so we don't need to do the extra work of saving
and restoring the rounding mode.

Backports commit 61db12d9f9eb36761edba4d9a414cd8dd34c512b
2021-03-01 20:04:31 -05:00
..
a32-uncond.decode target/arm: Convert Unallocated memory hint 2019-11-28 02:47:41 -05:00
a32.decode target/arm: Convert A32 coprocessor insns to decodetree 2021-02-26 10:57:00 -05:00
arm-powerctl.c arm/arm-powerctl: set NSACR.{CP11, CP10} bits in arm_set_cpu_on() 2020-01-07 18:10:29 -05:00
arm-powerctl.h ARM: Factor out ARM on/off PSCI control functions 2018-03-01 23:31:47 -05:00
arm_ldst.h Fix Thumb-1 BE32 execution and disassembly. 2018-03-02 00:20:11 -05:00
cpu-param.h target/arm: Don't use a TLB for ARMMMUIdx_Stage2 2020-05-07 08:40:06 -04:00
cpu-qom.h arm: Fix typo in AARCH64_CPU_GET_CLASS definition 2021-03-01 18:03:29 -05:00
cpu.c target/arm: Move id_pfr0, id_pfr1 into ARMISARegisters 2021-03-01 19:15:10 -05:00
cpu.h target/arm: Make isar_feature_aa32_fp16_arith() handle M-profile 2021-03-01 19:17:23 -05:00
cpu64.c target/arm: Make '-cpu max' have a 48-bit PA 2021-03-01 19:50:28 -05:00
crypto_helper.c target/arm: Split helper_crypto_sm3tt 2020-06-14 23:24:21 -04:00
debug_helper.c target/arm: Stop assuming DBGDIDR always exists 2020-03-21 18:26:24 -04:00
helper-a64.c target/arm: Remove local definitions of float constants 2021-02-27 16:47:10 -05:00
helper-a64.h target/arm: Add helper_mte_check_zva 2021-02-25 17:17:54 -05:00
helper-sve.h target/arm: Merge helper_sve_clr_* and helper_sve_movz_* 2021-02-26 14:23:06 -05:00
helper.c target/arm: Move id_pfr0, id_pfr1 into ARMISARegisters 2021-03-01 19:15:10 -05:00
helper.h target/arm: AArch32 VCVT fixed-point to float is always round-to-nearest 2021-03-01 20:04:31 -05:00
internals.h target/arm: Always pass cacheattr to get_phys_addr 2021-02-25 22:46:00 -05:00
iwmmxt_helper.c target/arm: Untabify iwmmxt_helper.c 2018-08-25 04:33:44 -04:00
kvm-consts.h arm: better stub version for MISMATCH_CHECK 2018-03-02 00:13:45 -05:00
m-nocp.decode target/arm: Do M-profile NOCP checks early and via decodetree 2021-02-26 11:17:23 -05:00
m_helper.c target/arm: Always pass cacheattr to get_phys_addr 2021-02-25 22:46:00 -05:00
Makefile.objs target/arm: Do M-profile NOCP checks early and via decodetree 2021-02-26 11:17:23 -05:00
mte_helper.c target/arm: Fill in the WnR syndrome bit in mte_check_fail 2021-02-26 12:26:15 -05:00
neon-dp.decode target/arm: Convert Neon VCVT fp size field to MO_* in decode 2021-03-01 18:20:11 -05:00
neon-ls.decode target/arm: Convert Neon 'load/store single structure' to decodetree 2020-05-07 09:32:17 -04:00
neon-shared.decode target/arm: Convert VCMLA, VCADD size field to MO_* in decode 2021-03-01 18:23:34 -05:00
neon_helper.c target/arm: Convert Neon VADD, VSUB, VABD 3-reg-same insns to decodetree 2020-05-15 23:26:51 -04:00
op_addsub.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
op_helper.c target/arm: Implement LDG, STG, ST2G instructions 2021-02-25 15:08:44 -05:00
pauth_helper.c target/arm: Fix AddPAC error indication 2021-02-25 23:44:28 -05:00
psci.c fix WFI/WFE length in syndrome register 2018-03-05 11:21:51 -05:00
sve.decode target/arm: Tidy SVE tszimm shift formats 2021-02-26 14:35:53 -05:00
sve_helper.c target/arm: Merge helper_sve_clr_* and helper_sve_movz_* 2021-02-26 14:23:06 -05:00
t16.decode target/arm: Convert T16, long branches 2019-11-28 02:53:54 -05:00
t32.decode target/arm: Convert T32 coprocessor insns to decodetree 2021-02-26 11:19:35 -05:00
tlb_helper.c target/arm: Cache the Tagged bit for a page in MemTxAttrs 2021-02-25 22:48:04 -05:00
translate-a64.c target/arm/translate-a64:Remove redundant statement in disas_simd_two_reg_misc_fp16() 2021-02-27 16:45:25 -05:00
translate-a64.h target/arm: Replace A64 get_fpstatus_ptr() with generic fpstatus_ptr() 2021-02-26 11:46:51 -05:00
translate-neon.inc.c target/arm: Convert VCMLA, VCADD size field to MO_* in decode 2021-03-01 18:23:34 -05:00
translate-sve.c target/arm: Fix SVE splice 2021-03-01 19:20:44 -05:00
translate-vfp.inc.c target/arm: AArch32 VCVT fixed-point to float is always round-to-nearest 2021-03-01 20:04:31 -05:00
translate.c target/arm: Fix SMLAD incorrect setting of Q bit 2021-03-01 19:58:39 -05:00
translate.h target/arm: Rearrange {sve,fp}_check_access assert 2021-02-26 13:56:27 -05:00
unicorn.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
unicorn_aarch64.c unicorn_aarch64: Use aa64_vfp_qreg instead of aa32_vfp_dreg 2018-09-03 07:47:40 +01:00
unicorn_arm.c arm/translate: Do not tracecode when in an IT block 2021-02-07 19:14:32 +00:00
vec_helper.c target/arm/vec_helper: Add gvec fp indexed multiply-and-add operations 2021-03-01 17:52:31 -05:00
vec_internal.h arm: Add missing file vec_internal.h 2020-06-20 00:12:09 +01:00
vfp-uncond.decode target/arm: Implement new VFP fp16 insn VMOVX 2021-03-01 16:24:50 -05:00
vfp.decode target/arm: Implement VFP fp16 VMOV between gp and halfprec registers 2021-03-01 16:26:34 -05:00
vfp_helper.c target/arm: AArch32 VCVT fixed-point to float is always round-to-nearest 2021-03-01 20:04:31 -05:00