[binutils-gdb] x86: correct VCVT{,U}SI2SD
Jan Beulich
jbeulich@sourceware.org
Fri May 24 09:51:32 GMT 2024
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=acd86c81f04405719471410302fe7f8e407d539c
commit acd86c81f04405719471410302fe7f8e407d539c
Author: Jan Beulich <jbeulich@suse.com>
Date: Fri May 24 11:50:38 2024 +0200
x86: correct VCVT{,U}SI2SD
Properly reject inappropriate suffixes (No_lSuf / No_qSuf mistakenly
omitted by cf665fee1d6c ["x86: re-work AVX512 embedded rounding / SAE"]),
to avoid emitting bad or arbitrarily guessed instructions. Interestingly
check_{long,qword}_suffix() don't help here, which perhaps is another
indication that the way they work right now isn't quite appropriate.
Sadly correcting just the templates breaks operand ambiguity detection,
since so far that worked from a single template permitting more than one
suffix. Here we have ambiguity though which can now be noticed only when
taking all (matching) templates together. Therefore we need to determine
further matching templates (see code comments for constraints), to then
accumulate permitted suffixes across all of them.
Diff:
---
gas/config/tc-i386.c | 52 ++++++++++++++++++++++++---
gas/testsuite/gas/i386/x86-64-inval-avx512f.l | 6 ++++
gas/testsuite/gas/i386/x86-64-inval-avx512f.s | 3 ++
opcodes/i386-opc.tbl | 16 ++++-----
opcodes/i386-tbl.h | 16 ++++-----
5 files changed, 72 insertions(+), 21 deletions(-)
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index a84e99977dc..1e580b9f6db 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -172,7 +172,7 @@ static void optimize_imm (void);
static bool optimize_disp (const insn_template *t);
static const insn_template *match_template (char);
static int check_string (void);
-static int process_suffix (void);
+static int process_suffix (const insn_template *);
static int check_byte_reg (void);
static int check_long_reg (void);
static int check_qword_reg (void);
@@ -6949,7 +6949,7 @@ md_assemble (char *line)
if (use_unaligned_vector_move)
encode_with_unaligned_vector_move ();
- if (!process_suffix ())
+ if (!process_suffix (t))
return;
/* Check if IP-relative addressing requirements can be satisfied. */
@@ -8361,12 +8361,16 @@ check_VecOperands (const insn_template *t)
if (operand_type_check (i.types[op], disp)
&& i.op[op].disps->X_op == O_constant)
{
+ /* Make sure to leave i.types[op].bitfield.disp8 alone upon
+ secondary invocations of match_template(). */
if (fits_in_disp8 (i.op[op].disps->X_add_number))
{
- i.types[op].bitfield.disp8 = 1;
+ if (!i.tm.mnem_off)
+ i.types[op].bitfield.disp8 = 1;
return 0;
}
- i.types[op].bitfield.disp8 = 0;
+ if (!i.tm.mnem_off)
+ i.types[op].bitfield.disp8 = 0;
}
}
@@ -9184,6 +9188,11 @@ match_template (char mnem_suffix)
return NULL;
}
+ /* Don't emit diagnostics or install the template when one was already
+ installed, i.e. when called from process_suffix(). */
+ if (i.tm.mnem_off)
+ return t;
+
if (!quiet_warnings)
{
if (!intel_syntax
@@ -9290,7 +9299,7 @@ check_string (void)
}
static int
-process_suffix (void)
+process_suffix (const insn_template *t)
{
bool is_movx = false;
@@ -9465,6 +9474,39 @@ process_suffix (void)
if (flag_code == CODE_64BIT && !i.tm.opcode_modifier.no_qsuf)
suffixes |= 1 << 5;
+ /* Operand size may be ambiguous only across multiple templates. Avoid
+ the extra effort though if we already know that multiple suffixes /
+ operand sizes are allowed. Also limit this to non-SIMD operand sizes
+ (i.e. ones expressable via suffixes) for now.
+ There's one special case though that needs excluding: Insns taking
+ Disp<N> operands also match templates permitting BaseIndex. JMP in
+ particular would thus wrongly trigger the check further down. Cover
+ JUMP_DWORD insns here as well, just in case. */
+ if (i.tm.opcode_modifier.jump != JUMP
+ && i.tm.opcode_modifier.jump != JUMP_DWORD)
+ while (!(suffixes & (suffixes - 1)))
+ {
+ /* Sadly check_VecOperands(), running ahead of install_template(),
+ may update i.memshift. Save and restore the value here. */
+ unsigned int memshift = i.memshift;
+
+ current_templates.start = t + 1;
+ t = match_template (0);
+ i.memshift = memshift;
+ if (t == NULL)
+ break;
+ if (!t->opcode_modifier.no_bsuf)
+ suffixes |= 1 << 0;
+ if (!t->opcode_modifier.no_wsuf)
+ suffixes |= 1 << 1;
+ if (!t->opcode_modifier.no_lsuf)
+ suffixes |= 1 << 2;
+ if (!t->opcode_modifier.no_ssuf)
+ suffixes |= 1 << 4;
+ if (flag_code == CODE_64BIT && !t->opcode_modifier.no_qsuf)
+ suffixes |= 1 << 5;
+ }
+
/* For [XYZ]MMWORD operands inspect operand sizes. While generally
also suitable for AT&T syntax mode, it was requested that this be
restricted to just Intel syntax. */
diff --git a/gas/testsuite/gas/i386/x86-64-inval-avx512f.l b/gas/testsuite/gas/i386/x86-64-inval-avx512f.l
index 634683f43ca..8eb8b7edb5b 100644
--- a/gas/testsuite/gas/i386/x86-64-inval-avx512f.l
+++ b/gas/testsuite/gas/i386/x86-64-inval-avx512f.l
@@ -41,6 +41,8 @@
.*:58: Error: .*
.*:61: Error: .*unsupported broadcast for `vdpbf16ps'
.*:62: Error: .*unsupported broadcast for `vcvtne2ps2bf16'
+.*:64: Error: .* `vcvtusi2sd'
+.*:65: Error: .* `vcvtusi2sd'
GAS LISTING .*
@@ -107,3 +109,7 @@ GAS LISTING .*
[ ]*60[ ]+\.att_syntax prefix
[ ]*61[ ]+vdpbf16ps 8\(%rax\)\{1to8\}, %zmm2, %zmm2
[ ]*62[ ]+vcvtne2ps2bf16 8\(%rax\)\{1to8\}, %zmm2, %zmm2
+[ ]*63[ ]*
+[ ]*64[ ]+vcvtusi2sdq %eax, %xmm0, %xmm0
+[ ]*65[ ]+vcvtusi2sdl %rax, \{rn-sae\}, %xmm0, %xmm0
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-inval-avx512f.s b/gas/testsuite/gas/i386/x86-64-inval-avx512f.s
index 934e9061cfd..731f2ca8c2f 100644
--- a/gas/testsuite/gas/i386/x86-64-inval-avx512f.s
+++ b/gas/testsuite/gas/i386/x86-64-inval-avx512f.s
@@ -60,3 +60,6 @@ _start:
.att_syntax prefix
vdpbf16ps 8(%rax){1to8}, %zmm2, %zmm2
vcvtne2ps2bf16 8(%rax){1to8}, %zmm2, %zmm2
+
+ vcvtusi2sdq %eax, %xmm0, %xmm0
+ vcvtusi2sdl %rax, {rn-sae}, %xmm0, %xmm0
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl
index faaa92c8d11..b2c50752bd5 100644
--- a/opcodes/i386-opc.tbl
+++ b/opcodes/i386-opc.tbl
@@ -2372,14 +2372,14 @@ vcvts<sdh>2usi, 0x<sdh:spfx>79, <sdh:cpu>, Modrm|EVexLIG|<sdh:spc1>|Disp8MemShif
vcvtsd2ss, 0xF25A, AVX512F, Modrm|EVexLIG|Masking|Space0F|Src1VVVV|VexW1|Disp8MemShift=3|NoSuf|StaticRounding|SAE, { RegXMM|Qword|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|ATTSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|ATTSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_sSuf|IntelSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|IntelSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|ATTSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|ATTSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_sSuf|IntelSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
-vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|IntelSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_qSuf|No_sSuf|ATTSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_lSuf|No_sSuf|StaticRounding|SAE|ATTSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_qSuf|No_sSuf|IntelSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtsi2sd, 0xF22A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_lSuf|No_sSuf|StaticRounding|SAE|IntelSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_qSuf|No_sSuf|ATTSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_lSuf|No_sSuf|StaticRounding|SAE|ATTSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_qSuf|No_sSuf|IntelSyntax, { Reg32|Unspecified|BaseIndex, RegXMM, RegXMM }
+vcvtusi2sd, 0xF27B, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_lSuf|No_sSuf|StaticRounding|SAE|IntelSyntax, { Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
vcvtsi2ss, 0xF32A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|ATTSyntax, { Reg32|Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
vcvtsi2ss, 0xF32A, AVX512F, Modrm|EVexLIG|Space0F|Src1VVVV|Disp8ShiftVL|No_bSuf|No_wSuf|No_sSuf|StaticRounding|SAE|IntelSyntax, { Reg32|Reg64|Unspecified|BaseIndex, RegXMM, RegXMM }
diff --git a/opcodes/i386-tbl.h b/opcodes/i386-tbl.h
index 76cdfd90519..e9a5d69a18f 100644
--- a/opcodes/i386-tbl.h
+++ b/opcodes/i386-tbl.h
@@ -22785,7 +22785,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtsi2sd, 0x2a, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 0, 0, 7, 0, 2, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -22797,7 +22797,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtsi2sd, 0x2a, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 1, 1, 7, 0, 2, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -22809,7 +22809,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtsi2sd, 0x2a, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 0, 0, 7, 0, 1, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -22821,7 +22821,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtsi2sd, 0x2a, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 1, 1, 7, 0, 1, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -34883,7 +34883,7 @@ static const insn_template i386_optab[] =
{ { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0,
0, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtusi2sd, 0x7b, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 0, 0, 7, 0, 2, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -34895,7 +34895,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtusi2sd, 0x7b, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 1, 1, 7, 0, 2, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -34907,7 +34907,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtusi2sd, 0x7b, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 0, 0, 7, 0, 1, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
@@ -34919,7 +34919,7 @@ static const insn_template i386_optab[] =
{ { 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0 } } } },
{ MN_vcvtusi2sd, 0x7b, 3, SPACE_0F, None,
- { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
+ { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 3, 0, 0, 4, 0, 0, 1, 1, 7, 0, 1, 0, 0, 0,
0, 0 },
{ { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 } },
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