* [PATCH] x86: fold special-operand insn attributes into a single enum
@ 2022-11-10 13:45 Jan Beulich
2022-11-10 17:38 ` H.J. Lu
2022-11-14 15:58 ` H.J. Lu
0 siblings, 2 replies; 7+ messages in thread
From: Jan Beulich @ 2022-11-10 13:45 UTC (permalink / raw)
To: Binutils; +Cc: H.J. Lu
Attributes which aren't used together in any single insn template can be
converted from individual booleans to a single enum, as was done for a few
other attributes before. This is more space efficient. Collect together
all attributes which express special operand constraints (and which fit
the criteria for folding).
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -2071,7 +2071,7 @@ operand_size_match (const insn_template
{
if (i.types[j].bitfield.class != Reg
&& i.types[j].bitfield.class != RegSIMD
- && t->opcode_modifier.anysize)
+ && t->opcode_modifier.operandconstraint == ANY_SIZE)
continue;
if (t->operand_types[j].bitfield.class == Reg
@@ -4518,7 +4518,7 @@ load_insn_p (void)
{
/* Anysize insns: lea, invlpg, clflush, prefetch*, bndmk, bndcl, bndcu,
bndcn, bndstx, bndldx, clflushopt, clwb, cldemote. */
- if (i.tm.opcode_modifier.anysize)
+ if (i.tm.opcode_modifier.operandconstraint == ANY_SIZE)
return 0;
/* pop. */
@@ -5107,7 +5107,7 @@ md_assemble (char *line)
if (!process_operands ())
return;
}
- else if (!quiet_warnings && i.tm.opcode_modifier.ugh)
+ else if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
{
/* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
as_warn (_("translating to `%sp'"), i.tm.name);
@@ -6020,7 +6020,7 @@ check_VecOperands (const insn_template *
}
/* Check if default mask is allowed. */
- if (t->opcode_modifier.nodefmask
+ if (t->opcode_modifier.operandconstraint == NO_DEFAULT_MASK
&& (!i.mask.reg || i.mask.reg->reg_num == 0))
{
i.error = no_default_mask;
@@ -6102,7 +6102,7 @@ check_VecOperands (const insn_template *
/* For some special instructions require that destination must be distinct
from source registers. */
- if (t->opcode_modifier.distinctdest)
+ if (t->opcode_modifier.operandconstraint == DISTINCT_DEST)
{
unsigned int dest_reg = i.operands - 1;
@@ -7047,7 +7047,7 @@ process_suffix (void)
i.suffix = QWORD_MNEM_SUFFIX;
else if (i.reg_operands
&& (i.operands > 1 || i.types[0].bitfield.class == Reg)
- && !i.tm.opcode_modifier.addrprefixopreg)
+ && i.tm.opcode_modifier.operandconstraint != ADDR_PREFIX_OP_REG)
{
unsigned int numop = i.operands;
@@ -7414,7 +7414,7 @@ process_suffix (void)
break;
}
- if (i.tm.opcode_modifier.addrprefixopreg)
+ if (i.tm.opcode_modifier.operandconstraint == ADDR_PREFIX_OP_REG)
{
gas_assert (!i.suffix);
gas_assert (i.reg_operands);
@@ -7808,7 +7808,7 @@ process_operands (void)
}
}
}
- else if (i.tm.opcode_modifier.implicit1stxmm0)
+ else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_1ST_XMM0)
{
gas_assert ((MAX_OPERANDS - 1) > dupl
&& (i.tm.opcode_modifier.vexsources
@@ -7876,7 +7876,7 @@ process_operands (void)
i.reg_operands--;
i.tm.operands--;
}
- else if (i.tm.opcode_modifier.implicitquadgroup)
+ else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_QUAD_GROUP)
{
unsigned int regnum, first_reg_in_group, last_reg_in_group;
@@ -7893,7 +7893,7 @@ process_operands (void)
register_prefix, i.op[1].regs->reg_name, last_reg_in_group,
i.tm.name);
}
- else if (i.tm.opcode_modifier.regkludge)
+ else if (i.tm.opcode_modifier.operandconstraint == REG_KLUDGE)
{
/* The imul $imm, %reg instruction is converted into
imul $imm, %reg, %reg, and the clr %reg instruction
@@ -7963,7 +7963,7 @@ process_operands (void)
i.tm.base_opcode |= i.op[op].regs->reg_num;
if ((i.op[op].regs->reg_flags & RegRex) != 0)
i.rex |= REX_B;
- if (!quiet_warnings && i.tm.opcode_modifier.ugh)
+ if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
{
/* Warn about some common errors, but press on regardless.
The first case can be generated by gcc (<= 2.8.1). */
@@ -8190,7 +8190,7 @@ build_modrm_byte (void)
unsigned int vvvv;
/* Swap two source operands if needed. */
- if (i.tm.opcode_modifier.swapsources)
+ if (i.tm.opcode_modifier.operandconstraint == SWAP_SOURCES)
{
vvvv = source;
source = dest;
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -729,9 +729,8 @@ static bitfield opcode_modifiers[] =
BITFIELD (FloatR),
BITFIELD (Size),
BITFIELD (CheckRegSize),
- BITFIELD (DistinctDest),
+ BITFIELD (OperandConstraint),
BITFIELD (MnemonicSize),
- BITFIELD (Anysize),
BITFIELD (No_bSuf),
BITFIELD (No_wSuf),
BITFIELD (No_lSuf),
@@ -742,14 +741,10 @@ static bitfield opcode_modifiers[] =
BITFIELD (IsString),
BITFIELD (RegMem),
BITFIELD (BNDPrefixOk),
- BITFIELD (RegKludge),
- BITFIELD (Implicit1stXmm0),
BITFIELD (PrefixOk),
- BITFIELD (AddrPrefixOpReg),
BITFIELD (IsPrefix),
BITFIELD (ImmExt),
BITFIELD (NoRex64),
- BITFIELD (Ugh),
BITFIELD (Vex),
BITFIELD (VexVVVV),
BITFIELD (VexW),
@@ -764,9 +759,6 @@ static bitfield opcode_modifiers[] =
BITFIELD (StaticRounding),
BITFIELD (SAE),
BITFIELD (Disp8MemShift),
- BITFIELD (NoDefMask),
- BITFIELD (ImplicitQuadGroup),
- BITFIELD (SwapSources),
BITFIELD (Optimize),
BITFIELD (ATTMnemonic),
BITFIELD (ATTSyntax),
--- a/opcodes/i386-opc.h
+++ b/opcodes/i386-opc.h
@@ -495,17 +495,35 @@ enum
Size,
/* check register size. */
CheckRegSize,
+ /* any memory size */
+#define ANY_SIZE 1
+ /* fake an extra reg operand for clr, imul and special register
+ processing for some instructions. */
+#define REG_KLUDGE 2
+ /* deprecated fp insn, gets a warning */
+#define UGH 3
+ /* An implicit xmm0 as the first operand */
+#define IMPLICIT_1ST_XMM0 4
+ /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
+ It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
+ */
+#define IMPLICIT_QUAD_GROUP 5
+ /* Two source operands are swapped. */
+#define SWAP_SOURCES 6
+ /* Default mask isn't allowed. */
+#define NO_DEFAULT_MASK 7
+ /* Address prefix changes register operand */
+#define ADDR_PREFIX_OP_REG 8
/* Instrucion requires that destination must be distinct from source
registers. */
- DistinctDest,
+#define DISTINCT_DEST 9
+ OperandConstraint,
/* instruction ignores operand size prefix and in Intel mode ignores
mnemonic size suffix check. */
#define IGNORESIZE 1
/* default insn size depends on mode */
#define DEFAULTSIZE 2
MnemonicSize,
- /* any memory size */
- Anysize,
/* b suffix on instruction illegal */
No_bSuf,
/* w suffix on instruction illegal */
@@ -533,11 +551,6 @@ enum
RegMem,
/* quick test if branch instruction is MPX supported */
BNDPrefixOk,
- /* fake an extra reg operand for clr, imul and special register
- processing for some instructions. */
- RegKludge,
- /* An implicit xmm0 as the first operand */
- Implicit1stXmm0,
#define PrefixNone 0
#define PrefixRep 1
#define PrefixHLERelease 2 /* Okay with an XRELEASE (0xf3) prefix. */
@@ -548,16 +561,12 @@ enum
#define PrefixHLELock 5 /* Okay with a LOCK prefix. */
#define PrefixHLEAny 6 /* Okay with or without a LOCK prefix. */
PrefixOk,
- /* Address prefix changes register operand */
- AddrPrefixOpReg,
/* opcode is a prefix */
IsPrefix,
/* instruction has extension in 8 bit imm */
ImmExt,
/* instruction don't need Rex64 prefix. */
NoRex64,
- /* deprecated fp insn, gets a warning */
- Ugh,
/* insn has VEX prefix:
1: 128bit VEX prefix (or operand dependent).
2: 256bit VEX prefix.
@@ -700,17 +709,6 @@ enum
#define DISP8_SHIFT_VL 7
Disp8MemShift,
- /* Default mask isn't allowed. */
- NoDefMask,
-
- /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
- It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
- */
- ImplicitQuadGroup,
-
- /* Two source operands are swapped. */
- SwapSources,
-
/* Support encoding optimization. */
Optimize,
@@ -745,9 +743,8 @@ typedef struct i386_opcode_modifier
unsigned int floatr:1;
unsigned int size:2;
unsigned int checkregsize:1;
- unsigned int distinctdest:1;
+ unsigned int operandconstraint:4;
unsigned int mnemonicsize:2;
- unsigned int anysize:1;
unsigned int no_bsuf:1;
unsigned int no_wsuf:1;
unsigned int no_lsuf:1;
@@ -758,14 +755,10 @@ typedef struct i386_opcode_modifier
unsigned int isstring:2;
unsigned int regmem:1;
unsigned int bndprefixok:1;
- unsigned int regkludge:1;
- unsigned int implicit1stxmm0:1;
unsigned int prefixok:3;
- unsigned int addrprefixopreg:1;
unsigned int isprefix:1;
unsigned int immext:1;
unsigned int norex64:1;
- unsigned int ugh:1;
unsigned int vex:2;
unsigned int vexvvvv:2;
unsigned int vexw:2;
@@ -780,9 +773,6 @@ typedef struct i386_opcode_modifier
unsigned int staticrounding:1;
unsigned int sae:1;
unsigned int disp8memshift:3;
- unsigned int nodefmask:1;
- unsigned int implicitquadgroup:1;
- unsigned int swapsources:1;
unsigned int optimize:1;
unsigned int attmnemonic:1;
unsigned int attsyntax:1;
--- a/opcodes/i386-opc.tbl
+++ b/opcodes/i386-opc.tbl
@@ -75,6 +75,17 @@
#define Size32 Size=SIZE32
#define Size64 Size=SIZE64
+#define AddrPrefixOpReg OperandConstraint=ADDR_PREFIX_OP_REG | \
+ No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
+#define Anysize OperandConstraint=ANY_SIZE
+#define DistinctDest OperandConstraint=DISTINCT_DEST
+#define Implicit1stXmm0 OperandConstraint=IMPLICIT_1ST_XMM0
+#define ImplicitQuadGroup OperandConstraint=IMPLICIT_QUAD_GROUP
+#define NoDefMask OperandConstraint=NO_DEFAULT_MASK
+#define RegKludge OperandConstraint=REG_KLUDGE
+#define SwapSources OperandConstraint=SWAP_SOURCES
+#define Ugh OperandConstraint=UGH
+
#define IgnoreSize MnemonicSize=IGNORESIZE
#define DefaultSize MnemonicSize=DEFAULTSIZE
@@ -91,8 +102,6 @@
#define HLEPrefixRelease PrefixOk=PrefixHLERelease
#define NoTrackPrefixOk PrefixOk=PrefixNoTrack
-#define AddrPrefixOpReg AddrPrefixOpReg|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
-
#define Space0F OpcodeSpace=SPACE_0F
#define Space0F38 OpcodeSpace=SPACE_0F38
#define Space0F3A OpcodeSpace=SPACE_0F3A
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-10 13:45 [PATCH] x86: fold special-operand insn attributes into a single enum Jan Beulich
@ 2022-11-10 17:38 ` H.J. Lu
2022-11-11 8:00 ` Jan Beulich
2022-11-14 15:58 ` H.J. Lu
1 sibling, 1 reply; 7+ messages in thread
From: H.J. Lu @ 2022-11-10 17:38 UTC (permalink / raw)
To: Jan Beulich; +Cc: Binutils
On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com> wrote:
>
> Attributes which aren't used together in any single insn template can be
> converted from individual booleans to a single enum, as was done for a few
> other attributes before. This is more space efficient. Collect together
> all attributes which express special operand constraints (and which fit
> the criteria for folding).
These assumptions may not be all true for future new instructions.
> --- a/gas/config/tc-i386.c
> +++ b/gas/config/tc-i386.c
> @@ -2071,7 +2071,7 @@ operand_size_match (const insn_template
> {
> if (i.types[j].bitfield.class != Reg
> && i.types[j].bitfield.class != RegSIMD
> - && t->opcode_modifier.anysize)
> + && t->opcode_modifier.operandconstraint == ANY_SIZE)
> continue;
>
> if (t->operand_types[j].bitfield.class == Reg
> @@ -4518,7 +4518,7 @@ load_insn_p (void)
> {
> /* Anysize insns: lea, invlpg, clflush, prefetch*, bndmk, bndcl, bndcu,
> bndcn, bndstx, bndldx, clflushopt, clwb, cldemote. */
> - if (i.tm.opcode_modifier.anysize)
> + if (i.tm.opcode_modifier.operandconstraint == ANY_SIZE)
> return 0;
>
> /* pop. */
> @@ -5107,7 +5107,7 @@ md_assemble (char *line)
> if (!process_operands ())
> return;
> }
> - else if (!quiet_warnings && i.tm.opcode_modifier.ugh)
> + else if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
> {
> /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
> as_warn (_("translating to `%sp'"), i.tm.name);
> @@ -6020,7 +6020,7 @@ check_VecOperands (const insn_template *
> }
>
> /* Check if default mask is allowed. */
> - if (t->opcode_modifier.nodefmask
> + if (t->opcode_modifier.operandconstraint == NO_DEFAULT_MASK
> && (!i.mask.reg || i.mask.reg->reg_num == 0))
> {
> i.error = no_default_mask;
> @@ -6102,7 +6102,7 @@ check_VecOperands (const insn_template *
>
> /* For some special instructions require that destination must be distinct
> from source registers. */
> - if (t->opcode_modifier.distinctdest)
> + if (t->opcode_modifier.operandconstraint == DISTINCT_DEST)
> {
> unsigned int dest_reg = i.operands - 1;
>
> @@ -7047,7 +7047,7 @@ process_suffix (void)
> i.suffix = QWORD_MNEM_SUFFIX;
> else if (i.reg_operands
> && (i.operands > 1 || i.types[0].bitfield.class == Reg)
> - && !i.tm.opcode_modifier.addrprefixopreg)
> + && i.tm.opcode_modifier.operandconstraint != ADDR_PREFIX_OP_REG)
> {
> unsigned int numop = i.operands;
>
> @@ -7414,7 +7414,7 @@ process_suffix (void)
> break;
> }
>
> - if (i.tm.opcode_modifier.addrprefixopreg)
> + if (i.tm.opcode_modifier.operandconstraint == ADDR_PREFIX_OP_REG)
> {
> gas_assert (!i.suffix);
> gas_assert (i.reg_operands);
> @@ -7808,7 +7808,7 @@ process_operands (void)
> }
> }
> }
> - else if (i.tm.opcode_modifier.implicit1stxmm0)
> + else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_1ST_XMM0)
> {
> gas_assert ((MAX_OPERANDS - 1) > dupl
> && (i.tm.opcode_modifier.vexsources
> @@ -7876,7 +7876,7 @@ process_operands (void)
> i.reg_operands--;
> i.tm.operands--;
> }
> - else if (i.tm.opcode_modifier.implicitquadgroup)
> + else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_QUAD_GROUP)
> {
> unsigned int regnum, first_reg_in_group, last_reg_in_group;
>
> @@ -7893,7 +7893,7 @@ process_operands (void)
> register_prefix, i.op[1].regs->reg_name, last_reg_in_group,
> i.tm.name);
> }
> - else if (i.tm.opcode_modifier.regkludge)
> + else if (i.tm.opcode_modifier.operandconstraint == REG_KLUDGE)
> {
> /* The imul $imm, %reg instruction is converted into
> imul $imm, %reg, %reg, and the clr %reg instruction
> @@ -7963,7 +7963,7 @@ process_operands (void)
> i.tm.base_opcode |= i.op[op].regs->reg_num;
> if ((i.op[op].regs->reg_flags & RegRex) != 0)
> i.rex |= REX_B;
> - if (!quiet_warnings && i.tm.opcode_modifier.ugh)
> + if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
> {
> /* Warn about some common errors, but press on regardless.
> The first case can be generated by gcc (<= 2.8.1). */
> @@ -8190,7 +8190,7 @@ build_modrm_byte (void)
> unsigned int vvvv;
>
> /* Swap two source operands if needed. */
> - if (i.tm.opcode_modifier.swapsources)
> + if (i.tm.opcode_modifier.operandconstraint == SWAP_SOURCES)
> {
> vvvv = source;
> source = dest;
> --- a/opcodes/i386-gen.c
> +++ b/opcodes/i386-gen.c
> @@ -729,9 +729,8 @@ static bitfield opcode_modifiers[] =
> BITFIELD (FloatR),
> BITFIELD (Size),
> BITFIELD (CheckRegSize),
> - BITFIELD (DistinctDest),
> + BITFIELD (OperandConstraint),
> BITFIELD (MnemonicSize),
> - BITFIELD (Anysize),
> BITFIELD (No_bSuf),
> BITFIELD (No_wSuf),
> BITFIELD (No_lSuf),
> @@ -742,14 +741,10 @@ static bitfield opcode_modifiers[] =
> BITFIELD (IsString),
> BITFIELD (RegMem),
> BITFIELD (BNDPrefixOk),
> - BITFIELD (RegKludge),
> - BITFIELD (Implicit1stXmm0),
> BITFIELD (PrefixOk),
> - BITFIELD (AddrPrefixOpReg),
> BITFIELD (IsPrefix),
> BITFIELD (ImmExt),
> BITFIELD (NoRex64),
> - BITFIELD (Ugh),
> BITFIELD (Vex),
> BITFIELD (VexVVVV),
> BITFIELD (VexW),
> @@ -764,9 +759,6 @@ static bitfield opcode_modifiers[] =
> BITFIELD (StaticRounding),
> BITFIELD (SAE),
> BITFIELD (Disp8MemShift),
> - BITFIELD (NoDefMask),
> - BITFIELD (ImplicitQuadGroup),
> - BITFIELD (SwapSources),
> BITFIELD (Optimize),
> BITFIELD (ATTMnemonic),
> BITFIELD (ATTSyntax),
> --- a/opcodes/i386-opc.h
> +++ b/opcodes/i386-opc.h
> @@ -495,17 +495,35 @@ enum
> Size,
> /* check register size. */
> CheckRegSize,
> + /* any memory size */
> +#define ANY_SIZE 1
> + /* fake an extra reg operand for clr, imul and special register
> + processing for some instructions. */
> +#define REG_KLUDGE 2
> + /* deprecated fp insn, gets a warning */
> +#define UGH 3
> + /* An implicit xmm0 as the first operand */
> +#define IMPLICIT_1ST_XMM0 4
> + /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
> + It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
> + */
> +#define IMPLICIT_QUAD_GROUP 5
> + /* Two source operands are swapped. */
> +#define SWAP_SOURCES 6
> + /* Default mask isn't allowed. */
> +#define NO_DEFAULT_MASK 7
> + /* Address prefix changes register operand */
> +#define ADDR_PREFIX_OP_REG 8
> /* Instrucion requires that destination must be distinct from source
> registers. */
> - DistinctDest,
> +#define DISTINCT_DEST 9
> + OperandConstraint,
> /* instruction ignores operand size prefix and in Intel mode ignores
> mnemonic size suffix check. */
> #define IGNORESIZE 1
> /* default insn size depends on mode */
> #define DEFAULTSIZE 2
> MnemonicSize,
> - /* any memory size */
> - Anysize,
> /* b suffix on instruction illegal */
> No_bSuf,
> /* w suffix on instruction illegal */
> @@ -533,11 +551,6 @@ enum
> RegMem,
> /* quick test if branch instruction is MPX supported */
> BNDPrefixOk,
> - /* fake an extra reg operand for clr, imul and special register
> - processing for some instructions. */
> - RegKludge,
> - /* An implicit xmm0 as the first operand */
> - Implicit1stXmm0,
> #define PrefixNone 0
> #define PrefixRep 1
> #define PrefixHLERelease 2 /* Okay with an XRELEASE (0xf3) prefix. */
> @@ -548,16 +561,12 @@ enum
> #define PrefixHLELock 5 /* Okay with a LOCK prefix. */
> #define PrefixHLEAny 6 /* Okay with or without a LOCK prefix. */
> PrefixOk,
> - /* Address prefix changes register operand */
> - AddrPrefixOpReg,
> /* opcode is a prefix */
> IsPrefix,
> /* instruction has extension in 8 bit imm */
> ImmExt,
> /* instruction don't need Rex64 prefix. */
> NoRex64,
> - /* deprecated fp insn, gets a warning */
> - Ugh,
> /* insn has VEX prefix:
> 1: 128bit VEX prefix (or operand dependent).
> 2: 256bit VEX prefix.
> @@ -700,17 +709,6 @@ enum
> #define DISP8_SHIFT_VL 7
> Disp8MemShift,
>
> - /* Default mask isn't allowed. */
> - NoDefMask,
> -
> - /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
> - It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
> - */
> - ImplicitQuadGroup,
> -
> - /* Two source operands are swapped. */
> - SwapSources,
> -
> /* Support encoding optimization. */
> Optimize,
>
> @@ -745,9 +743,8 @@ typedef struct i386_opcode_modifier
> unsigned int floatr:1;
> unsigned int size:2;
> unsigned int checkregsize:1;
> - unsigned int distinctdest:1;
> + unsigned int operandconstraint:4;
> unsigned int mnemonicsize:2;
> - unsigned int anysize:1;
> unsigned int no_bsuf:1;
> unsigned int no_wsuf:1;
> unsigned int no_lsuf:1;
> @@ -758,14 +755,10 @@ typedef struct i386_opcode_modifier
> unsigned int isstring:2;
> unsigned int regmem:1;
> unsigned int bndprefixok:1;
> - unsigned int regkludge:1;
> - unsigned int implicit1stxmm0:1;
> unsigned int prefixok:3;
> - unsigned int addrprefixopreg:1;
> unsigned int isprefix:1;
> unsigned int immext:1;
> unsigned int norex64:1;
> - unsigned int ugh:1;
> unsigned int vex:2;
> unsigned int vexvvvv:2;
> unsigned int vexw:2;
> @@ -780,9 +773,6 @@ typedef struct i386_opcode_modifier
> unsigned int staticrounding:1;
> unsigned int sae:1;
> unsigned int disp8memshift:3;
> - unsigned int nodefmask:1;
> - unsigned int implicitquadgroup:1;
> - unsigned int swapsources:1;
> unsigned int optimize:1;
> unsigned int attmnemonic:1;
> unsigned int attsyntax:1;
> --- a/opcodes/i386-opc.tbl
> +++ b/opcodes/i386-opc.tbl
> @@ -75,6 +75,17 @@
> #define Size32 Size=SIZE32
> #define Size64 Size=SIZE64
>
> +#define AddrPrefixOpReg OperandConstraint=ADDR_PREFIX_OP_REG | \
> + No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
> +#define Anysize OperandConstraint=ANY_SIZE
> +#define DistinctDest OperandConstraint=DISTINCT_DEST
> +#define Implicit1stXmm0 OperandConstraint=IMPLICIT_1ST_XMM0
> +#define ImplicitQuadGroup OperandConstraint=IMPLICIT_QUAD_GROUP
> +#define NoDefMask OperandConstraint=NO_DEFAULT_MASK
> +#define RegKludge OperandConstraint=REG_KLUDGE
> +#define SwapSources OperandConstraint=SWAP_SOURCES
> +#define Ugh OperandConstraint=UGH
> +
> #define IgnoreSize MnemonicSize=IGNORESIZE
> #define DefaultSize MnemonicSize=DEFAULTSIZE
>
> @@ -91,8 +102,6 @@
> #define HLEPrefixRelease PrefixOk=PrefixHLERelease
> #define NoTrackPrefixOk PrefixOk=PrefixNoTrack
>
> -#define AddrPrefixOpReg AddrPrefixOpReg|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
> -
> #define Space0F OpcodeSpace=SPACE_0F
> #define Space0F38 OpcodeSpace=SPACE_0F38
> #define Space0F3A OpcodeSpace=SPACE_0F3A
--
H.J.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-10 17:38 ` H.J. Lu
@ 2022-11-11 8:00 ` Jan Beulich
2022-11-11 8:22 ` Jan Beulich
0 siblings, 1 reply; 7+ messages in thread
From: Jan Beulich @ 2022-11-11 8:00 UTC (permalink / raw)
To: H.J. Lu; +Cc: Binutils
On 10.11.2022 18:38, H.J. Lu wrote:
> On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com> wrote:
>>
>> Attributes which aren't used together in any single insn template can be
>> converted from individual booleans to a single enum, as was done for a few
>> other attributes before. This is more space efficient. Collect together
>> all attributes which express special operand constraints (and which fit
>> the criteria for folding).
>
> These assumptions may not be all true for future new instructions.
It seems pretty unlikely to me that any of these assumptions would break.
If one does, converting back to an individual bit is an easy option. I
think this minor risk is far outweighed by the benefits of the change. We
really have still some ways to go to reach reasonable data representation
within the generated opcode table (and of course also in the source table,
but that's an orthogonal direction of work, where I also have further
changes pending).
Jan
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-11 8:00 ` Jan Beulich
@ 2022-11-11 8:22 ` Jan Beulich
2022-11-11 19:48 ` H.J. Lu
0 siblings, 1 reply; 7+ messages in thread
From: Jan Beulich @ 2022-11-11 8:22 UTC (permalink / raw)
To: H.J. Lu; +Cc: Binutils
On 11.11.2022 09:00, Jan Beulich via Binutils wrote:
> On 10.11.2022 18:38, H.J. Lu wrote:
>> On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com> wrote:
>>>
>>> Attributes which aren't used together in any single insn template can be
>>> converted from individual booleans to a single enum, as was done for a few
>>> other attributes before. This is more space efficient. Collect together
>>> all attributes which express special operand constraints (and which fit
>>> the criteria for folding).
>>
>> These assumptions may not be all true for future new instructions.
>
> It seems pretty unlikely to me that any of these assumptions would break.
> If one does, converting back to an individual bit is an easy option. I
> think this minor risk is far outweighed by the benefits of the change. We
> really have still some ways to go to reach reasonable data representation
> within the generated opcode table (and of course also in the source table,
> but that's an orthogonal direction of work, where I also have further
> changes pending).
I should probably expand: For most of these I don't expect new uses to appear
at all. Note also that I left alone e.g. ImmExt, for having a bigger risk of
a new conflicting use appearing.
If you have concerns for a specific attribute, please voice it that way. I'm
certainly willing to re-consider for individual attributes (albeit as said
in the earlier reply, the way back for any individual one is easy); I'm not
going to accept a blanket "no".
Jan
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-11 8:22 ` Jan Beulich
@ 2022-11-11 19:48 ` H.J. Lu
2022-11-14 1:38 ` Jiang, Haochen
0 siblings, 1 reply; 7+ messages in thread
From: H.J. Lu @ 2022-11-11 19:48 UTC (permalink / raw)
To: Jan Beulich, Kong Lingling, Jiang, Haochen, Lili Cui; +Cc: Binutils
On Fri, Nov 11, 2022 at 12:22 AM Jan Beulich <jbeulich@suse.com> wrote:
>
> On 11.11.2022 09:00, Jan Beulich via Binutils wrote:
> > On 10.11.2022 18:38, H.J. Lu wrote:
> >> On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com> wrote:
> >>>
> >>> Attributes which aren't used together in any single insn template can be
> >>> converted from individual booleans to a single enum, as was done for a few
> >>> other attributes before. This is more space efficient. Collect together
> >>> all attributes which express special operand constraints (and which fit
> >>> the criteria for folding).
> >>
> >> These assumptions may not be all true for future new instructions.
> >
> > It seems pretty unlikely to me that any of these assumptions would break.
> > If one does, converting back to an individual bit is an easy option. I
> > think this minor risk is far outweighed by the benefits of the change. We
> > really have still some ways to go to reach reasonable data representation
> > within the generated opcode table (and of course also in the source table,
> > but that's an orthogonal direction of work, where I also have further
> > changes pending).
>
> I should probably expand: For most of these I don't expect new uses to appear
> at all. Note also that I left alone e.g. ImmExt, for having a bigger risk of
> a new conflicting use appearing.
>
> If you have concerns for a specific attribute, please voice it that way. I'm
> certainly willing to re-consider for individual attributes (albeit as said
> in the earlier reply, the way back for any individual one is easy); I'm not
> going to accept a blanket "no".
>
> Jan
Lingling, Lili, Haochen, do you have any comments?
Thanks.
--
H.J.
^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-11 19:48 ` H.J. Lu
@ 2022-11-14 1:38 ` Jiang, Haochen
0 siblings, 0 replies; 7+ messages in thread
From: Jiang, Haochen @ 2022-11-14 1:38 UTC (permalink / raw)
To: H.J. Lu, Beulich, Jan, Kong, Lingling, Cui, Lili; +Cc: Binutils
> -----Original Message-----
> From: H.J. Lu <hjl.tools@gmail.com>
> Sent: Saturday, November 12, 2022 3:49 AM
> To: Beulich, Jan <JBeulich@suse.com>; Kong, Lingling
> <lingling.kong@intel.com>; Jiang, Haochen <haochen.jiang@intel.com>; Cui,
> Lili <lili.cui@intel.com>
> Cc: Binutils <binutils@sourceware.org>
> Subject: Re: [PATCH] x86: fold special-operand insn attributes into a single
> enum
>
> On Fri, Nov 11, 2022 at 12:22 AM Jan Beulich <jbeulich@suse.com> wrote:
> >
> > On 11.11.2022 09:00, Jan Beulich via Binutils wrote:
> > > On 10.11.2022 18:38, H.J. Lu wrote:
> > >> On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com>
> wrote:
> > >>>
> > >>> Attributes which aren't used together in any single insn template
> > >>> can be converted from individual booleans to a single enum, as was
> > >>> done for a few other attributes before. This is more space
> > >>> efficient. Collect together all attributes which express special
> > >>> operand constraints (and which fit the criteria for folding).
> > >>
> > >> These assumptions may not be all true for future new instructions.
> > >
> > > It seems pretty unlikely to me that any of these assumptions would break.
> > > If one does, converting back to an individual bit is an easy option.
> > > I think this minor risk is far outweighed by the benefits of the
> > > change. We really have still some ways to go to reach reasonable
> > > data representation within the generated opcode table (and of course
> > > also in the source table, but that's an orthogonal direction of
> > > work, where I also have further changes pending).
> >
> > I should probably expand: For most of these I don't expect new uses to
> > appear at all. Note also that I left alone e.g. ImmExt, for having a
> > bigger risk of a new conflicting use appearing.
> >
> > If you have concerns for a specific attribute, please voice it that
> > way. I'm certainly willing to re-consider for individual attributes
> > (albeit as said in the earlier reply, the way back for any individual
> > one is easy); I'm not going to accept a blanket "no".
> >
> > Jan
>
> Lingling, Lili, Haochen, do you have any comments?
As far as I see, I go with Jan. If anything break in the future, we could convert
back to individual bits.
Another benefit is that if we have another special-operand insn attrbutes,
we could also add to this and do not need an extra bit since only 0-8 used.
Haochen
>
> Thanks.
>
> --
> H.J.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] x86: fold special-operand insn attributes into a single enum
2022-11-10 13:45 [PATCH] x86: fold special-operand insn attributes into a single enum Jan Beulich
2022-11-10 17:38 ` H.J. Lu
@ 2022-11-14 15:58 ` H.J. Lu
1 sibling, 0 replies; 7+ messages in thread
From: H.J. Lu @ 2022-11-14 15:58 UTC (permalink / raw)
To: Jan Beulich; +Cc: Binutils
On Thu, Nov 10, 2022 at 5:45 AM Jan Beulich <jbeulich@suse.com> wrote:
>
> Attributes which aren't used together in any single insn template can be
> converted from individual booleans to a single enum, as was done for a few
> other attributes before. This is more space efficient. Collect together
> all attributes which express special operand constraints (and which fit
> the criteria for folding).
>
> --- a/gas/config/tc-i386.c
> +++ b/gas/config/tc-i386.c
> @@ -2071,7 +2071,7 @@ operand_size_match (const insn_template
> {
> if (i.types[j].bitfield.class != Reg
> && i.types[j].bitfield.class != RegSIMD
> - && t->opcode_modifier.anysize)
> + && t->opcode_modifier.operandconstraint == ANY_SIZE)
> continue;
>
> if (t->operand_types[j].bitfield.class == Reg
> @@ -4518,7 +4518,7 @@ load_insn_p (void)
> {
> /* Anysize insns: lea, invlpg, clflush, prefetch*, bndmk, bndcl, bndcu,
> bndcn, bndstx, bndldx, clflushopt, clwb, cldemote. */
> - if (i.tm.opcode_modifier.anysize)
> + if (i.tm.opcode_modifier.operandconstraint == ANY_SIZE)
> return 0;
>
> /* pop. */
> @@ -5107,7 +5107,7 @@ md_assemble (char *line)
> if (!process_operands ())
> return;
> }
> - else if (!quiet_warnings && i.tm.opcode_modifier.ugh)
> + else if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
> {
> /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
> as_warn (_("translating to `%sp'"), i.tm.name);
> @@ -6020,7 +6020,7 @@ check_VecOperands (const insn_template *
> }
>
> /* Check if default mask is allowed. */
> - if (t->opcode_modifier.nodefmask
> + if (t->opcode_modifier.operandconstraint == NO_DEFAULT_MASK
> && (!i.mask.reg || i.mask.reg->reg_num == 0))
> {
> i.error = no_default_mask;
> @@ -6102,7 +6102,7 @@ check_VecOperands (const insn_template *
>
> /* For some special instructions require that destination must be distinct
> from source registers. */
> - if (t->opcode_modifier.distinctdest)
> + if (t->opcode_modifier.operandconstraint == DISTINCT_DEST)
> {
> unsigned int dest_reg = i.operands - 1;
>
> @@ -7047,7 +7047,7 @@ process_suffix (void)
> i.suffix = QWORD_MNEM_SUFFIX;
> else if (i.reg_operands
> && (i.operands > 1 || i.types[0].bitfield.class == Reg)
> - && !i.tm.opcode_modifier.addrprefixopreg)
> + && i.tm.opcode_modifier.operandconstraint != ADDR_PREFIX_OP_REG)
> {
> unsigned int numop = i.operands;
>
> @@ -7414,7 +7414,7 @@ process_suffix (void)
> break;
> }
>
> - if (i.tm.opcode_modifier.addrprefixopreg)
> + if (i.tm.opcode_modifier.operandconstraint == ADDR_PREFIX_OP_REG)
> {
> gas_assert (!i.suffix);
> gas_assert (i.reg_operands);
> @@ -7808,7 +7808,7 @@ process_operands (void)
> }
> }
> }
> - else if (i.tm.opcode_modifier.implicit1stxmm0)
> + else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_1ST_XMM0)
> {
> gas_assert ((MAX_OPERANDS - 1) > dupl
> && (i.tm.opcode_modifier.vexsources
> @@ -7876,7 +7876,7 @@ process_operands (void)
> i.reg_operands--;
> i.tm.operands--;
> }
> - else if (i.tm.opcode_modifier.implicitquadgroup)
> + else if (i.tm.opcode_modifier.operandconstraint == IMPLICIT_QUAD_GROUP)
> {
> unsigned int regnum, first_reg_in_group, last_reg_in_group;
>
> @@ -7893,7 +7893,7 @@ process_operands (void)
> register_prefix, i.op[1].regs->reg_name, last_reg_in_group,
> i.tm.name);
> }
> - else if (i.tm.opcode_modifier.regkludge)
> + else if (i.tm.opcode_modifier.operandconstraint == REG_KLUDGE)
> {
> /* The imul $imm, %reg instruction is converted into
> imul $imm, %reg, %reg, and the clr %reg instruction
> @@ -7963,7 +7963,7 @@ process_operands (void)
> i.tm.base_opcode |= i.op[op].regs->reg_num;
> if ((i.op[op].regs->reg_flags & RegRex) != 0)
> i.rex |= REX_B;
> - if (!quiet_warnings && i.tm.opcode_modifier.ugh)
> + if (!quiet_warnings && i.tm.opcode_modifier.operandconstraint == UGH)
> {
> /* Warn about some common errors, but press on regardless.
> The first case can be generated by gcc (<= 2.8.1). */
> @@ -8190,7 +8190,7 @@ build_modrm_byte (void)
> unsigned int vvvv;
>
> /* Swap two source operands if needed. */
> - if (i.tm.opcode_modifier.swapsources)
> + if (i.tm.opcode_modifier.operandconstraint == SWAP_SOURCES)
> {
> vvvv = source;
> source = dest;
> --- a/opcodes/i386-gen.c
> +++ b/opcodes/i386-gen.c
> @@ -729,9 +729,8 @@ static bitfield opcode_modifiers[] =
> BITFIELD (FloatR),
> BITFIELD (Size),
> BITFIELD (CheckRegSize),
> - BITFIELD (DistinctDest),
> + BITFIELD (OperandConstraint),
> BITFIELD (MnemonicSize),
> - BITFIELD (Anysize),
> BITFIELD (No_bSuf),
> BITFIELD (No_wSuf),
> BITFIELD (No_lSuf),
> @@ -742,14 +741,10 @@ static bitfield opcode_modifiers[] =
> BITFIELD (IsString),
> BITFIELD (RegMem),
> BITFIELD (BNDPrefixOk),
> - BITFIELD (RegKludge),
> - BITFIELD (Implicit1stXmm0),
> BITFIELD (PrefixOk),
> - BITFIELD (AddrPrefixOpReg),
> BITFIELD (IsPrefix),
> BITFIELD (ImmExt),
> BITFIELD (NoRex64),
> - BITFIELD (Ugh),
> BITFIELD (Vex),
> BITFIELD (VexVVVV),
> BITFIELD (VexW),
> @@ -764,9 +759,6 @@ static bitfield opcode_modifiers[] =
> BITFIELD (StaticRounding),
> BITFIELD (SAE),
> BITFIELD (Disp8MemShift),
> - BITFIELD (NoDefMask),
> - BITFIELD (ImplicitQuadGroup),
> - BITFIELD (SwapSources),
> BITFIELD (Optimize),
> BITFIELD (ATTMnemonic),
> BITFIELD (ATTSyntax),
> --- a/opcodes/i386-opc.h
> +++ b/opcodes/i386-opc.h
> @@ -495,17 +495,35 @@ enum
> Size,
> /* check register size. */
> CheckRegSize,
> + /* any memory size */
> +#define ANY_SIZE 1
> + /* fake an extra reg operand for clr, imul and special register
> + processing for some instructions. */
> +#define REG_KLUDGE 2
> + /* deprecated fp insn, gets a warning */
> +#define UGH 3
> + /* An implicit xmm0 as the first operand */
> +#define IMPLICIT_1ST_XMM0 4
> + /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
> + It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
> + */
> +#define IMPLICIT_QUAD_GROUP 5
> + /* Two source operands are swapped. */
> +#define SWAP_SOURCES 6
> + /* Default mask isn't allowed. */
> +#define NO_DEFAULT_MASK 7
> + /* Address prefix changes register operand */
> +#define ADDR_PREFIX_OP_REG 8
> /* Instrucion requires that destination must be distinct from source
> registers. */
> - DistinctDest,
> +#define DISTINCT_DEST 9
> + OperandConstraint,
> /* instruction ignores operand size prefix and in Intel mode ignores
> mnemonic size suffix check. */
> #define IGNORESIZE 1
> /* default insn size depends on mode */
> #define DEFAULTSIZE 2
> MnemonicSize,
> - /* any memory size */
> - Anysize,
> /* b suffix on instruction illegal */
> No_bSuf,
> /* w suffix on instruction illegal */
> @@ -533,11 +551,6 @@ enum
> RegMem,
> /* quick test if branch instruction is MPX supported */
> BNDPrefixOk,
> - /* fake an extra reg operand for clr, imul and special register
> - processing for some instructions. */
> - RegKludge,
> - /* An implicit xmm0 as the first operand */
> - Implicit1stXmm0,
> #define PrefixNone 0
> #define PrefixRep 1
> #define PrefixHLERelease 2 /* Okay with an XRELEASE (0xf3) prefix. */
> @@ -548,16 +561,12 @@ enum
> #define PrefixHLELock 5 /* Okay with a LOCK prefix. */
> #define PrefixHLEAny 6 /* Okay with or without a LOCK prefix. */
> PrefixOk,
> - /* Address prefix changes register operand */
> - AddrPrefixOpReg,
> /* opcode is a prefix */
> IsPrefix,
> /* instruction has extension in 8 bit imm */
> ImmExt,
> /* instruction don't need Rex64 prefix. */
> NoRex64,
> - /* deprecated fp insn, gets a warning */
> - Ugh,
> /* insn has VEX prefix:
> 1: 128bit VEX prefix (or operand dependent).
> 2: 256bit VEX prefix.
> @@ -700,17 +709,6 @@ enum
> #define DISP8_SHIFT_VL 7
> Disp8MemShift,
>
> - /* Default mask isn't allowed. */
> - NoDefMask,
> -
> - /* The second operand must be a vector register, {x,y,z}mmN, where N is a multiple of 4.
> - It implicitly denotes the register group of {x,y,z}mmN - {x,y,z}mm(N + 3).
> - */
> - ImplicitQuadGroup,
> -
> - /* Two source operands are swapped. */
> - SwapSources,
> -
> /* Support encoding optimization. */
> Optimize,
>
> @@ -745,9 +743,8 @@ typedef struct i386_opcode_modifier
> unsigned int floatr:1;
> unsigned int size:2;
> unsigned int checkregsize:1;
> - unsigned int distinctdest:1;
> + unsigned int operandconstraint:4;
> unsigned int mnemonicsize:2;
> - unsigned int anysize:1;
> unsigned int no_bsuf:1;
> unsigned int no_wsuf:1;
> unsigned int no_lsuf:1;
> @@ -758,14 +755,10 @@ typedef struct i386_opcode_modifier
> unsigned int isstring:2;
> unsigned int regmem:1;
> unsigned int bndprefixok:1;
> - unsigned int regkludge:1;
> - unsigned int implicit1stxmm0:1;
> unsigned int prefixok:3;
> - unsigned int addrprefixopreg:1;
> unsigned int isprefix:1;
> unsigned int immext:1;
> unsigned int norex64:1;
> - unsigned int ugh:1;
> unsigned int vex:2;
> unsigned int vexvvvv:2;
> unsigned int vexw:2;
> @@ -780,9 +773,6 @@ typedef struct i386_opcode_modifier
> unsigned int staticrounding:1;
> unsigned int sae:1;
> unsigned int disp8memshift:3;
> - unsigned int nodefmask:1;
> - unsigned int implicitquadgroup:1;
> - unsigned int swapsources:1;
> unsigned int optimize:1;
> unsigned int attmnemonic:1;
> unsigned int attsyntax:1;
> --- a/opcodes/i386-opc.tbl
> +++ b/opcodes/i386-opc.tbl
> @@ -75,6 +75,17 @@
> #define Size32 Size=SIZE32
> #define Size64 Size=SIZE64
>
> +#define AddrPrefixOpReg OperandConstraint=ADDR_PREFIX_OP_REG | \
> + No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
> +#define Anysize OperandConstraint=ANY_SIZE
> +#define DistinctDest OperandConstraint=DISTINCT_DEST
> +#define Implicit1stXmm0 OperandConstraint=IMPLICIT_1ST_XMM0
> +#define ImplicitQuadGroup OperandConstraint=IMPLICIT_QUAD_GROUP
> +#define NoDefMask OperandConstraint=NO_DEFAULT_MASK
> +#define RegKludge OperandConstraint=REG_KLUDGE
> +#define SwapSources OperandConstraint=SWAP_SOURCES
> +#define Ugh OperandConstraint=UGH
> +
> #define IgnoreSize MnemonicSize=IGNORESIZE
> #define DefaultSize MnemonicSize=DEFAULTSIZE
>
> @@ -91,8 +102,6 @@
> #define HLEPrefixRelease PrefixOk=PrefixHLERelease
> #define NoTrackPrefixOk PrefixOk=PrefixNoTrack
>
> -#define AddrPrefixOpReg AddrPrefixOpReg|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf
> -
> #define Space0F OpcodeSpace=SPACE_0F
> #define Space0F38 OpcodeSpace=SPACE_0F38
> #define Space0F3A OpcodeSpace=SPACE_0F3A
OK.
Thanks.
--
H.J.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-11-14 15:59 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2022-11-10 13:45 [PATCH] x86: fold special-operand insn attributes into a single enum Jan Beulich
2022-11-10 17:38 ` H.J. Lu
2022-11-11 8:00 ` Jan Beulich
2022-11-11 8:22 ` Jan Beulich
2022-11-11 19:48 ` H.J. Lu
2022-11-14 1:38 ` Jiang, Haochen
2022-11-14 15:58 ` H.J. Lu
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