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716 Commits

Author SHA1 Message Date
Alistair Francis 48eaeb56de target/riscv: Implement the stval/mtval illegal instruction 
The stval and mtval registers can optionally contain the faulting
instruction on an illegal instruction exception. This patch adds support
for setting the stval and mtval registers.

The RISC-V spec states that "The stval register can optionally also be
used to return the faulting instruction bits on an illegal instruction
exception...". In this case we are always writing the value on an
illegal instruction.

This doesn't match all CPUs (some CPUs won't write the data), but in
QEMU let's just populate the value on illegal instructions. This won't
break any guest software, but will provide more information to guests.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211220064916.107241-4-alistair.francis@opensource.wdc.com
 2022-01-08 15:46:10 +10:00
Alistair Francis 86d0c45739 target/riscv: Fixup setting GVA 
In preparation for adding support for the illegal instruction address
let's fixup the Hypervisor extension setting GVA logic and improve the
variable names.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211220064916.107241-3-alistair.francis@opensource.wdc.com
 2022-01-08 15:46:10 +10:00
Alistair Francis ea7b5d5af6 target/riscv: Set the opcode in DisasContext 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211220064916.107241-2-alistair.francis@opensource.wdc.com
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 457c360f9c target/riscv: actual functions to realize crs 128-bit insns 
The csrs are accessed through function pointers: we add 128-bit read
operations in the table for three csrs (writes fallback to the
64-bit version as the upper 64-bit information is handled elsewhere):
- misa, as mxl is needed for proper operation,
- mstatus and sstatus, to return sd
In addition, we also add read and write accesses to the machine and
supervisor scratch registers.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-19-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 7934fdeee7 target/riscv: modification of the trans_csrxx for 128-bit support 
As opposed to the gen_arith and gen_shift generation helpers, the csr insns
do not have a common prototype, so the choice to generate 32/64 or 128-bit
helper calls is done in the trans_csrxx functions.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-18-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 961738ffea target/riscv: helper functions to wrap calls to 128-bit csr insns 
Given the side effects they have, the csr instructions are realized as
helpers. We extend this existing infrastructure for 128-bit sized csr.
We return 128-bit values using the same approach as for div/rem.
Theses helpers all call a unique function that is currently a fallback
on the 64-bit version.
The trans_csrxx functions supporting 128-bit are yet to be implemented.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-17-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 2c64ab66c1 target/riscv: adding high part of some csrs 
Adding the high part of a very minimal set of csr.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-16-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot b3a5d1fbeb target/riscv: support for 128-bit M extension 
Mult are generated inline (using a cool trick pointed out by Richard), but
for div and rem, given the complexity of the implementation of these
instructions, we call helpers to produce their behavior. From an
implementation standpoint, the helpers return the low part of the results,
while the high part is temporarily stored in a dedicated field of cpu_env
that is used to update the architectural register in the generation wrapper.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-15-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 7fd40f8679 target/riscv: support for 128-bit arithmetic instructions 
Addition of 128-bit adds and subs in their various sizes,
"set if less than"s and branches.
Refactored the code to have a comparison function used for both stls and
branches.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-14-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 6bf4bbed20 target/riscv: support for 128-bit shift instructions 
Handling shifts for 32, 64 and 128 operation length for RV128, following the
general framework for handling various olens proposed by Richard.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-13-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 57c108b864 target/riscv: support for 128-bit U-type instructions 
Adding the 128-bit version of lui and auipc, and introducing to that end
a "set register with immediat" function to handle extension on 128 bits.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-12-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 568f247f69 target/riscv: support for 128-bit bitwise instructions 
The 128-bit bitwise instructions do not need any function prototype change
as the functions can be applied independently on the lower and upper part of
the registers.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-11-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot a2f827ff4f target/riscv: accessors to registers upper part and 128-bit load/store 
Get function to retrieve the 64 top bits of a register, stored in the gprh
field of the cpu state. Set function that writes the 128-bit value at once.
The access to the gprh field can not be protected at compile time to make
sure it is accessed only in the 128-bit version of the processor because we
have no way to indicate that the misa_mxl_max field is const.

The 128-bit ISA adds ldu, lq and sq. We provide support for these
instructions. Note that (a) we compute only 64-bit addresses to actually
access memory, cowardly utilizing the existing address translation mechanism
of QEMU, and (b) we assume for now little-endian memory accesses.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-10-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 76a361066f target/riscv: moving some insns close to similar insns 
lwu and ld are functionally close to the other loads, but were after the
stores in the source file.
Similarly, xor was away from or and and by two arithmetic functions, while
the immediate versions were nicely put together.
This patch moves the aforementioned loads after lhu, and xor above or,
where they more logically belong.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-9-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 332dab6878 target/riscv: setup everything for rv64 to support rv128 execution 
This patch adds the support of the '-cpu rv128' option to
qemu-system-riscv64 so that we can indicate that we want to run rv128
executables.
Still, there is no support for 128-bit insns at that stage so qemu fails
miserably (as expected) if launched with this option.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-8-frederic.petrot@univ-grenoble-alpes.fr
[ Changed by AF
 - Rename CPU to "x-rv128"
]
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 2b5470843a target/riscv: array for the 64 upper bits of 128-bit registers 
The upper 64-bit of the 128-bit registers have now a place inside
the cpu state structure, and are created as globals for future use.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-7-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot a1a3aac448 target/riscv: separation of bitwise logic and arithmetic helpers 
Introduction of a gen_logic function for bitwise logic to implement
instructions in which no propagation of information occurs between bits and
use of this function on the bitwise instructions.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-6-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot 344b4a82fc target/riscv: additional macros to check instruction support 
Given that the 128-bit version of the riscv spec adds new instructions, and
that some instructions that were previously only available in 64-bit mode
are now available for both 64-bit and 128-bit, we added new macros to check
for the processor mode during translation.
Although RV128 is a superset of RV64, we keep for now the RV64 only tests
for extensions other than RVI and RVM.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-5-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Frédéric Pétrot fc313c6434 exec/memop: Adding signedness to quad definitions 
Renaming defines for quad in their various forms so that their signedness is
now explicit.
Done using git grep as suggested by Philippe, with a bit of hand edition to
keep assignments aligned.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106210108.138226-2-frederic.petrot@univ-grenoble-alpes.fr
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:10 +10:00
Philipp Tomsich dfdb46a376 target/riscv: Fix position of 'experimental' comment 
When commit 0643c12e4b dropped the 'x-' prefix for Zb[abcs] and set
them to be enabled by default, the comment about experimental
extensions was kept in place above them.  This moves it down a few
lines to only cover experimental extensions.

References: 0643c12e4b ("target/riscv: Enable bitmanip Zb[abcs] instructions")

Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220106134020.1628889-1-philipp.tomsich@vrull.eu
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:09 +10:00
Frank Chang 79e6176ea0 target/riscv: rvv-1.0: Call the correct RVF/RVD check function for narrowing fp/int type-convert insns 
vfncvt.f.xu.w, vfncvt.f.x.w convert double-width integer to single-width
floating-point. Therefore, should use require_rvf() to check whether
RVF/RVD is enabled.

vfncvt.f.f.w, vfncvt.rod.f.f.w convert double-width floating-point to
single-width integer. Therefore, should use require_scale_rvf() to check
whether RVF/RVD is enabled.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220105022247.21131-4-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:09 +10:00
Frank Chang 91cade44cd target/riscv: rvv-1.0: Call the correct RVF/RVD check function for widening fp/int type-convert insns 
vfwcvt.xu.f.v, vfwcvt.x.f.v, vfwcvt.rtz.xu.f.v and vfwcvt.rtz.x.f.v
convert single-width floating-point to double-width integer.
Therefore, should use require_rvf() to check whether RVF/RVD is enabled.

vfwcvt.f.xu.v, vfwcvt.f.x.v convert single-width integer to double-width
floating-point, and vfwcvt.f.f.v convert double-width floating-point to
single-width floating-point. Therefore, should use require_scale_rvf() to
check whether RVF/RVD is enabled.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220105022247.21131-3-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:09 +10:00
Frank Chang 629ccdaa4e target/riscv: rvv-1.0: Call the correct RVF/RVD check function for widening fp insns 
Vector widening floating-point instructions should use
require_scale_rvf() instead of require_rvf() to check whether RVF/RVD is
enabled.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220105022247.21131-2-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:09 +10:00
Alistair Francis 07cb270a9a target/riscv: Enable the Hypervisor extension by default 
Let's enable the Hypervisor extension by default. This doesn't affect
named CPUs (such as lowrisc-ibex or sifive-u54) but does enable the
Hypervisor extensions by default for the virt machine.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20220105213937.1113508-7-alistair.francis@opensource.wdc.com>
 2022-01-08 15:46:09 +10:00
Alistair Francis 6ca7155a8c target/riscv: Mark the Hypervisor extension as non experimental 
The Hypervisor spec is now frozen, so remove the experimental tag.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20220105213937.1113508-6-alistair.francis@opensource.wdc.com>
 2022-01-08 15:46:09 +10:00
Nikita Shubin 0fbb5d2d3c target/riscv/pmp: fix no pmp illegal intrs 
As per the privilege specification, any access from S/U mode should fail
if no pmp region is configured and pmp is present, othwerwise access
should succeed.

Fixes: d102f19a20 (target/riscv/pmp: Raise exception if no PMP entry is configured)
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211214092659.15709-1-nikita.shubin@maquefel.me
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2022-01-08 15:46:09 +10:00
Vineet Gupta 0643c12e4b target/riscv: Enable bitmanip Zb[abcs] instructions 
The bitmanip extension has now been ratified [1] and upstream tooling
(gcc/binutils) support it too, so move them out of experimental and also
enable by default (for better test exposure/coverage)

[1] https://wiki.riscv.org/display/TECH/Recently+Ratified+Extensions

Signed-off-by: Vineet Gupta <vineetg@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211216051844.3921088-1-vineetg@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang cc13aa3614 target/riscv: rvv-1.0: Add ELEN checks for widening and narrowing instructions 
SEW has the limitation which cannot exceed ELEN.

Widening instructions have a destination group with EEW = 2*SEW
and narrowing instructions have a source operand with EEW = 2*SEW.
Both of the instructions have the limitation of: 2*SEW <= ELEN.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-78-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 45ca2ca6bd target/riscv: rvv-1.0: update opivv_vadc_check() comment 
Vector Integer Add-with-Carry / Subtract-with-Borrow Instructions is
moved to Section 11.4 in RVV v1.0 spec. Update the comment, no
functional changes.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-77-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 9c0d2559de target/riscv: rvv-1.0: rename vmandnot.mm and vmornot.mm to vmandn.mm and vmorn.mm 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-76-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 26086aea0d target/riscv: rvv-1.0: add vector unit-stride mask load/store insns 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-75-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 5c89e9c096 target/riscv: rvv-1.0: add evl parameter to vext_ldst_us() 
Add supports of Vector unit-stride mask load/store instructions
(vlm.v, vsm.v), which has:
    evl (effective vector length) = ceil(env->vl / 8).

The new instructions operate the same as unmasked byte loads and stores.
Add evl parameter to reuse vext_ldst_us().

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-74-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 34a2c2d81a target/riscv: rvv-1.0: add vsetivli instruction 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-73-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 6b5c8eb3e7 target/riscv: rvv-1.0: rename r2_zimm to r2_zimm11 
Rename r2_zimm to r2_zimm11 for the upcoming vsetivli instruction.
vsetivli has 10-bits of zimm but vsetvli has 11-bits of zimm.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-72-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 55c35407c3 target/riscv: rvv-1.0: floating-point reciprocal estimate instruction 
Implement the floating-point reciprocal estimate to 7 bits instruction.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-71-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang e848a1e563 target/riscv: rvv-1.0: floating-point reciprocal square-root estimate instruction 
Implement the floating-point reciprocal square-root estimate to 7 bits
instruction.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-70-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Hsiangkai Wang 719d3561b2 target/riscv: gdb: support vector registers for rv64 & rv32 
Signed-off-by: Hsiangkai Wang <kai.wang@sifive.com>
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-69-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang d6c4d3f2a6 target/riscv: rvv-1.0: trigger illegal instruction exception if frm is not valid 
If the frm field contains an invalid rounding mode (101-111),
attempting to execute any vector floating-point instruction, even
those that do not depend on the rounding mode, will raise an illegal
instruction exception.

Call gen_set_rm() with DYN rounding mode to check and trigger illegal
instruction exception if frm field contains invalid value at run-time
for vector floating-point instructions.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-68-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang f714361ed7 target/riscv: rvv-1.0: implement vstart CSR 
* Update and check vstart value for vector instructions.
* Add whole register move instruction helper functions as we have to
  call helper function for case where vstart is not zero.
* Remove probe_pages() calls in vector load/store instructions
  (except fault-only-first loads) to raise the memory access exception
  at the exact processed vector element.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-67-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 8a4b52575a target/riscv: rvv-1.0: relax RV_VLEN_MAX to 1024-bits 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-66-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang ff679b58e3 target/riscv: rvv-1.0: narrowing floating-point/integer type-convert 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-65-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 75804f7131 target/riscv: add "set round to odd" rounding mode helper function 
helper_set_rounding_mode() is responsible for SIGILL, and "round to odd"
should be an interface private to translation, so add a new independent
helper_set_rod_rounding_mode().

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-64-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 3ce4c09df7 target/riscv: rvv-1.0: widening floating-point/integer type-convert 
Add the following instructions:

* vfwcvt.rtz.xu.f.v
* vfwcvt.rtz.x.f.v

Also adjust GEN_OPFV_WIDEN_TRANS() to accept multiple floating-point
rounding modes.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-63-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 900da87ab9 target/riscv: rvv-1.0: floating-point/integer type-convert instructions 
Add the following instructions:

* vfcvt.rtz.xu.f.v
* vfcvt.rtz.x.f.v

Also adjust GEN_OPFV_TRANS() to accept multiple floating-point rounding
modes.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-62-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 986c895de1 target/riscv: introduce floating-point rounding mode enum 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-61-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 49c5611a97 target/riscv: rvv-1.0: floating-point min/max instructions 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-60-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang c3536f2f55 target/riscv: rvv-1.0: remove integer extract instruction 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-59-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang e29c5cefd8 target/riscv: rvv-1.0: remove vmford.vv and vmford.vf 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-58-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang a12c812d19 target/riscv: rvv-1.0: remove widening saturating scaled multiply-add 
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-57-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00
Frank Chang 74eb7834bc target/riscv: rvv-1.0: single-width scaling shift instructions 
log(SEW) truncate vssra.vi immediate value.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211210075704.23951-56-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 2021-12-20 14:53:31 +10:00