Add the table of FP formats

[omasanori]

Fix #2906

[github-actions]

Normative Rule Changes Detected

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Normative Tag Change Report

riscv-spec Specification

================================================================================
Tag Changes Report
================================================================================

Reference file: ref/riscv-spec-norm-tags.json
Current file: build/riscv-spec-norm-tags.json
Added 2 tags:
  * "norm:pma_amo_ziccamoc_req": "The ext:ziccamoc[] extension requires AMOCASQ-level
support to main memory regions with both the coh..."
  * "norm:pma_mag_zama16b_req": "The Zama16b extension requires MAG16 support to main
memory regions."

Modified 36 tags:
  * "norm:Zca_align16":
      Reference: "The C extension allows 16-bit instructions to be freely
intermixed with 32-bit instructions, with th..."
      Current:   "The ext:zca[] extension allows 16-bit instructions to be freely
intermixed with 32-bit instructions,..."
  * "norm:Zca_hints":
      Reference: "A portion of the RVC encoding space is reserved for microarchitectural
HINTs. Like the HINTs in the ..."
      Current:   "A portion of the ext:zca[] encoding space is reserved for microarchitectural
HINTs. Like the HINTs i..."
  * "norm:Zca_no_misaligned":
      Reference: "With the addition of the C
extension, no instructions can raise instruction-address-misaligned
excep..."
      Current:   "With the addition of the ext:zca[]
extension, no instructions can raise instruction-address-misalign..."
  * "norm:Zca_offsets_mul2":
      Reference: "As with base RVI instructions, the offsets of all RVC
control transfer instructions are in multiples..."
      Current:   "As with base RVI instructions, the offsets of all ext:zca[]
control transfer instructions are in mul..."
  * "norm:Zcmop_instr_write":
      Reference: "Unlike the MOPs defined in the Zimop extension, the C.MOP.n instructions
are defined to not write an..."
      Current:   "Unlike the MOPs defined in the extlink:zimop[] extension, the C.MOP.n instructions
are defined to no..."
  * "norm:Zcmop_op":
      Reference: "This section defines the "Zcmop" extension, which defines eight 16-bit MOP
instructions named C.MOP...."
      Current:   "This section defines the ext:zcmop[] extension, which defines eight 16-bit MOP
instructions named C...."
  * "norm:Zilsd_sd_x0":
      Reference: "If using x0 as src of SD or C.SDSP, the entire 64-bit operand is zero — i.e., register x1 is not acc..."
      Current:   "If using x0 as src of SD, the entire 64-bit operand is zero — i.e., register x1 is not accessed."
  * "norm:Zimop_mop-r_op":
      Reference: "The Zimop extension defines 32 MOP instructions named MOP.R.n, where
n is an integer between 0 and 3..."
      Current:   "The ext:zimop[] extension defines 32 MOP instructions named MOP.R.n, where
n is an integer between 0..."
  * "norm:Zimop_mop-rr_op":
      Reference: "The Zimop extension additionally defines 8 MOP instructions named
MOP.RR.n, where n is an integer be..."
      Current:   "The ext:zimop[] extension additionally defines 8 MOP instructions named
MOP.RR.n, where n is an inte..."
  * "norm:c-addiw_op":
      Reference: "C.ADDIW is an RV64C-only instruction that performs the same
computation but produces a 32-bit result..."
      Current:   "C.ADDIW is an XLEN=64-only instruction that performs the same
computation but produces a 32-bit resu..."
  * "norm:c-addw_op":
      Reference: "C.ADDW is an RV64C-only instruction that adds the values in
registers rd′ and rs2′, then
sign-extend..."
      Current:   "C.ADDW is an XLEN=64-only instruction that adds the values in
registers rd′ and rs2′, then
sign-exte..."
  * "norm:c-flwsp_op":
      Reference: "C.FLWSP is an RV32FC-only instruction that loads a single-precision
floating-point value from memory..."
      Current:   "C.FLWSP is an RV32FC-only instruction that loads a single-precision
floating-point value from memory..."
  * "norm:c-jal_op":
      Reference: "C.JAL is an RV32C-only instruction that performs the same operation as
C.J, but additionally writes ..."
      Current:   "C.JAL is an XLEN=32-only instruction that performs the same operation as
C.J, but additionally write..."
  * "norm:c-ld_op":
      Reference: "C.LD is an RV64C-only instruction that loads a 64-bit value from
memory into register rd′. It comput..."
      Current:   "C.LD is an XLEN=64-only instruction that loads a 64-bit value from
memory into register rd′. It comp..."
  * "norm:c-ldsp_op":
      Reference: "C.LDSP is an RV64C-only instruction that loads a 64-bit value
from memory into register rd. It compu..."
      Current:   "C.LDSP is an XLEN=64-only instruction that loads a 64-bit value
from memory into register rd. It com..."
  * "norm:c-sd_op":
      Reference: "C.SD is an RV64C-only instruction that stores a 64-bit value in
register rs2′ to memory. It computes..."
      Current:   "C.SD is an XLEN=64-only instruction that stores a 64-bit value in
register rs2′ to memory. It comput..."
  * "norm:c-sdsp_op":
      Reference: "C.SDSP is an RV64C-only instruction that stores a 64-bit value in
register rs2 to memory. It compute..."
      Current:   "C.SDSP is an XLEN=64-only instruction that stores a 64-bit value in
register rs2 to memory. It compu..."
  * "norm:c-slli_shamt5":
      Reference: "For RV32C, shamt[5] must be zero; the code points with shamt[5]=1
are designated for custom extensio..."
      Current:   "For XLEN=32, shamt[5] must be zero; the code points with shamt[5]=1
are designated for custom extens..."
  * "norm:c-srli_shamt5":
      Reference: "For RV32C, shamt[5] must be zero; the code points with shamt[5]=1
are designated for custom extensio..."
      Current:   "For XLEN=32, shamt[5] must be zero; the code points with shamt[5]=1
are designated for custom extens..."
  * "norm:c-subw_op":
      Reference: "C.SUBW is an RV64C-only instruction that subtracts the value in
register rs2′ from the value in regi..."
      Current:   "C.SUBW is an XLEN=64-only instruction that subtracts the value in
register rs2′ from the value in re..."
  * "norm:f_depends_zicsr":
      Reference: "The F extension depends
on the "Zicsr" extension for control and status register access."
      Current:   "The ext:f[] extension depends on the
ext:zicsr[] extension."
  * "norm:f_ieee_compliance":
      Reference: "computational instructions
compliant with the <<ieee754-2008, IEEE 754-2008 arithmetic standar..."
      Current:   "computational instructions
compliant with the IEEE 754-2008 arithmetic standard's binary32 format an..."
  * "norm:fence_i_op":
      Reference: "A FENCE.I instruction orders all explicit memory accesses that precede the FENCE.I in program order ..."
      Current:   "A insn:fence.i[] instruction orders all explicit memory accesses that precede the insn:fence.i[] in ..."
  * "norm:fence_i_rsv":
      Reference: "The unused fields in the FENCE.I instruction, funct12, rs1, and rd, are reserved for finer-grain fen..."
      Current:   "The unused fields in the insn:fence.i[] instruction, funct12, rs1, and rd, are reserved for finer-gr..."
  * "norm:imm_always_sex":
      Reference: "Except for the 5-bit immediates used in CSR instructions (<<csrinsts>>),
immediates are ..."
      Current:   "Except for the 5-bit immediates used in <<ext:zicsr,CSR instructions>>,
immediates are a..."
  * "norm:jvt_op":
      Reference: "If <<Zcmt>> is implemented then jvt must also be implemented, but can contain a read-onl..."
      Current:   "If ext:zcmt[] is implemented then jvt must also be implemented, but can contain a read-only value. I..."
  * "norm:misa_c_set_line":
      Reference: "MISA.C is set if the following extensions are selected:"
      Current:   "csr:misa[c] must be clear if any of the following holds:"
  * "norm:misa_c_set_list":
      Reference: "Zca and not F
Zca, Zcf and F (but not D) is specified (RV32 only)
Zca, Zcf and Zcd if D is specified..."
      Current:   "ext:zca[] is not implemented
MXLEN=32, ext:f[] is implemented, and ext:zcf[] is not implemented
ext:..."
  * "norm:misa_extensions_enc_tbl":
      Reference: "Bit|Character|Description
===
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25|A
..."
      Current:   "Bit|Character|Description
===
0|A|Atomic extension¶1|B|B extension¶2|C|Compressed extension¶3|D|Doub..."
  * "norm:mnstatus_mnpv_op":
      Reference: "It also holds a one-bit
field, MNPV, which on entry to the RNMI trap handler holds the virtualizatio..."
      Current:   "If the H extension is also
implemented, mnstatus also holds a one-bit
field, MNPV, which on entry to..."
  * "norm:mstatus_mdt_clr_mnret":
      Reference: "The MNRET instruction, provided by the Smrnmi extension, sets the MDT bit to 0 if the new privilege ..."
      Current:   "When the Smdbltrp extension is implemented, the MNRET instruction, provided by the Smrnmi extension,..."
  * "norm:mstatus_mdt_clr_mret_sret":
      Reference: "The MRET and SRET instructions, when executed in M-mode, set the MDT bit to 0."
      Current:   "The MDT bit is set to 0."
  * "norm:priv_combs_tbl":
      Reference: "Number of levels|Supported Modes|Intended Usage
===
1
2
3|M
M, U
M, S, U|Simple embedded systems
Sec..."
      Current:   "Number of levels|Supported Modes|Intended Usage
===
1|M|Simple embedded systems¶2|M, U|Secure embedd..."
  * "norm:priv_levels_tbl":
      Reference: "Level|Encoding|Name|Abbreviation
===
0
1
2
3|00
01
10
11|User/Application
Supervisor
Reserved
Machin..."
      Current:   "Level|Encoding|Name|Abbreviation
===
0|00|User/Application|U¶1|01|Supervisor|S¶2|10|Reserved| ¶..."
  * "norm:sstatus_sdt_clr_mnret":
      Reference: "If it is U, VS, or VU, then sstatus.SDT is also set to 0."
      Current:   "If the Ssdbltrp extension is also implemented, and the new privilege mode is U, VS, or VU, then ssta..."
  * "norm:sstatus_sdt_clr_mret_sret":
      Reference: "If the new privilege mode is U, VS, or VU, then sstatus.SDT is also set to 0."
      Current:   "If the Ssdbltrp extension is also implemented, and the new privilege mode is U, VS, or VU, then ssta..."

================================================================================
Summary: 38 total changes
  Added:    2
  Deleted:  0
  Modified: 36
================================================================================

---

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• When this PR is merged, a GitHub issue will be automatically created with the NormRules label for CSC tracking
• If these changes are unintentional, please update the PR before merging

How to update reference files (if needed):

make update-ref
git add ref/*.json
git commit -m "Update normative tag reference files"

Note: New tags (additions) are automatically added to the reference files when PRs are merged to main. Only modifications and deletions require manual review.

This comment was automatically generated by the normative tag check workflow.

[omasanori]

Just a reminder.