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x86: record register use for SIMD insns without respective explicit operands

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VZERO{ALL,UPPER} modify YMM registers despite having no operands.

While {,V}{LD,ST}MXCSR don't modify XMM registers, MXCSR and XMMn
collectively form underlying machine state.
This commit is contained in:
Jan Beulich
2021-02-16 11:32:18 +01:00
parent cbe6869656
commit 014d61ea14
9 changed files with 60 additions and 0 deletions
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12
gas/ChangeLog
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@ -1,3 +1,15 @@
2021-02-16 Jan Beulich <jbeulich@suse.com>
* config/tc-i386.c (output_insn): Handle ldmxcsr, stmxcsr,
vldmxcsr, vstmxcsr, vzeroall, and vzeroupper.
* testsuite/gas/i386/property-ldmxcsr.s,
testsuite/gas/i386/property-ldmxcsr.d,
testsuite/gas/i386/property-vldmxcsr.s,
testsuite/gas/i386/property-vldmxcsr.d,
testsuite/gas/i386/property-vzeroall.s,
testsuite/gas/i386/property-vzeroall.d: New.
* testsuite/gas/i386/i386.exp: Run new tests.
2021-02-16 Jan Beulich <jbeulich@suse.com> 2021-02-16 Jan Beulich <jbeulich@suse.com>
* testsuite/gas/i386/i386.exp: Move bitness-independent property * testsuite/gas/i386/i386.exp: Move bitness-independent property

12
gas/config/tc-i386.c
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@ -9208,10 +9208,12 @@ output_insn (void)
|| i.tm.cpu_flags.bitfield.cpu687 || i.tm.cpu_flags.bitfield.cpu687
|| i.tm.cpu_flags.bitfield.cpufisttp) || i.tm.cpu_flags.bitfield.cpufisttp)
x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_X87; x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_X87;
if ((i.xstate & xstate_mmx) if ((i.xstate & xstate_mmx)
|| i.tm.base_opcode == 0xf77 /* emms */ || i.tm.base_opcode == 0xf77 /* emms */
|| i.tm.base_opcode == 0xf0e /* femms */) || i.tm.base_opcode == 0xf0e /* femms */)
x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_MMX; x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_MMX;
if (i.index_reg) if (i.index_reg)
{ {
if (i.index_reg->reg_type.bitfield.zmmword) if (i.index_reg->reg_type.bitfield.zmmword)
@ -9221,10 +9223,20 @@ output_insn (void)
else if (i.index_reg->reg_type.bitfield.xmmword) else if (i.index_reg->reg_type.bitfield.xmmword)
i.xstate |= xstate_xmm; i.xstate |= xstate_xmm;
} }
/* vzeroall / vzeroupper */
if (i.tm.base_opcode == 0x77 && i.tm.cpu_flags.bitfield.cpuavx)
i.xstate |= xstate_ymm;
if ((i.xstate & xstate_xmm) if ((i.xstate & xstate_xmm)
/* ldmxcsr / stmxcsr */
|| (i.tm.base_opcode == 0xfae && i.tm.cpu_flags.bitfield.cpusse)
/* vldmxcsr / vstmxcsr */
|| (i.tm.base_opcode == 0xae && i.tm.cpu_flags.bitfield.cpuavx)
|| i.tm.cpu_flags.bitfield.cpuwidekl || i.tm.cpu_flags.bitfield.cpuwidekl
|| i.tm.cpu_flags.bitfield.cpukl) || i.tm.cpu_flags.bitfield.cpukl)
x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_XMM; x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_XMM;
if ((i.xstate & xstate_ymm) == xstate_ymm) if ((i.xstate & xstate_ymm) == xstate_ymm)
x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_YMM; x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_YMM;
if ((i.xstate & xstate_zmm) == xstate_zmm) if ((i.xstate & xstate_zmm) == xstate_zmm)

3
gas/testsuite/gas/i386/i386.exp
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@ -725,6 +725,9 @@ if {[is_elf_format] || [istarget "*-*-vxworks*"]} then {
run_dump_test "property-11" run_dump_test "property-11"
run_dump_test "property-12" run_dump_test "property-12"
run_dump_test "property-13" run_dump_test "property-13"
run_dump_test "property-ldmxcsr"
run_dump_test "property-vldmxcsr"
run_dump_test "property-vzeroall"
if {![istarget "*-*-dragonfly*"] if {![istarget "*-*-dragonfly*"]
&& ![istarget "*-*-gnu*"] && ![istarget "*-*-gnu*"]

9
gas/testsuite/gas/i386/property-ldmxcsr.d Normal file
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@ -0,0 +1,9 @@
#name: i386 property ldmxcsr
#as: -mx86-used-note=yes --generate-missing-build-notes=no
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
Properties: x86 ISA used: x86-64-baseline
x86 feature used: x86, XMM

2
gas/testsuite/gas/i386/property-ldmxcsr.s Normal file
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@ -0,0 +1,2 @@
.text
ldmxcsr (%eax)

9
gas/testsuite/gas/i386/property-vldmxcsr.d Normal file
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@ -0,0 +1,9 @@
#name: i386 property vldmxcsr
#as: -mx86-used-note=yes --generate-missing-build-notes=no
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
Properties: x86 ISA used: x86-64-baseline, x86-64-v3
x86 feature used: x86, XMM

2
gas/testsuite/gas/i386/property-vldmxcsr.s Normal file
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@ -0,0 +1,2 @@
.text
vldmxcsr (%eax)

9
gas/testsuite/gas/i386/property-vzeroall.d Normal file
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@ -0,0 +1,9 @@
#name: i386 property vzeroall
#as: -mx86-used-note=yes --generate-missing-build-notes=no
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
Properties: x86 ISA used: x86-64-baseline, x86-64-v3
x86 feature used: x86, XMM, YMM

2
gas/testsuite/gas/i386/property-vzeroall.s Normal file
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@ -0,0 +1,2 @@
.text
vzeroall