github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 09:04:39 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: selftests: Dedup the gnarly constraints of the fastops tests (more macros!)

Browse Source 
Add a fastop() macro along with macros to define its required constraints,
and use the macros to dedup the innermost guts of the fastop testcases.

No functional change intended.

Link: https://lore.kernel.org/r/20250909202835.333554-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-09-09 13:28:34 -07:00
parent 9bf5da1ca4
commit fe08478b1d
1 changed files with 18 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
tools/testing/selftests/kvm/x86/fastops_test.c
View File

@ -8,14 +8,20 @@
* to set RFLAGS.CF based on whether or not the input is even or odd, so that
* instructions like ADC and SBB are deterministic.
*/
#define fastop(__insn) \
"bt $0, %[bt_val]\n\t" \
__insn "\n\t" \
"pushfq\n\t" \
"pop %[flags]\n\t"
#define flags_constraint(flags_val) [flags]"=r"(flags_val)
#define bt_constraint(__bt_val) [bt_val]"rm"((uint32_t)__bt_val)
#define guest_execute_fastop_1(FEP, insn, __val, __flags) \
({ \
__asm__ __volatile__("bt $0, %[ro_val]\n\t" \
FEP insn " %[val]\n\t" \
"pushfq\n\t" \
"pop %[flags]\n\t" \
: [val]"+r"(__val), [flags]"=r"(__flags) \
: [ro_val]"rm"((uint32_t)__val) \
__asm__ __volatile__(fastop(FEP insn " %[val]") \
: [val]"+r"(__val), flags_constraint(__flags) \
: bt_constraint(__val) \
: "cc", "memory"); \
})
@ -37,12 +43,9 @@
#define guest_execute_fastop_2(FEP, insn, __input, __output, __flags) \
({ \
__asm__ __volatile__("bt $0, %[ro_val]\n\t" \
FEP insn " %[input], %[output]\n\t" \
"pushfq\n\t" \
"pop %[flags]\n\t" \
: [output]"+r"(__output), [flags]"=r"(__flags) \
: [input]"r"(__input), [ro_val]"rm"((uint32_t)__output) \
__asm__ __volatile__(fastop(FEP insn " %[input], %[output]") \
: [output]"+r"(__output), flags_constraint(__flags) \
: [input]"r"(__input), bt_constraint(__output) \
: "cc", "memory"); \
})
@ -65,12 +68,9 @@
#define guest_execute_fastop_cl(FEP, insn, __shift, __output, __flags) \
({ \
__asm__ __volatile__("bt $0, %[ro_val]\n\t" \
FEP insn " %%cl, %[output]\n\t" \
"pushfq\n\t" \
"pop %[flags]\n\t" \
: [output]"+r"(__output), [flags]"=r"(__flags) \
: "c"(__shift), [ro_val]"rm"((uint32_t)__output) \
__asm__ __volatile__(fastop(FEP insn " %%cl, %[output]") \
: [output]"+r"(__output), flags_constraint(__flags) \
: "c"(__shift), bt_constraint(__output) \
: "cc", "memory"); \
})