diff options
Diffstat (limited to 'lib/Target/X86/README-X86-64.txt')
| -rw-r--r-- | lib/Target/X86/README-X86-64.txt | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/lib/Target/X86/README-X86-64.txt b/lib/Target/X86/README-X86-64.txt index bdff56d..59cecdf 100644 --- a/lib/Target/X86/README-X86-64.txt +++ b/lib/Target/X86/README-X86-64.txt @@ -249,15 +249,6 @@ _a: addq $8, %rsp ret -note the dead rsp adjustments. Also, there is surely a better/shorter way -to clear the top 32-bits of a 64-bit register than movl+andq. Testcase here: - -unsigned long long c(unsigned long long a) {return a&4294967295; } - -_c: - movl $4294967295, %ecx - movq %rdi, %rax - andq %rcx, %rax - ret +note the dead rsp adjustments. //===---------------------------------------------------------------------===// |