https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67443
--- Comment #6 from wmi at google dot com ---
(In reply to Dominik Vogt from comment #3)
> I think the Rtl in comment 1 ist correct. Note that "i" is stored at
> 0x00000000.xx000000 and "j" is stored at 0x00000000.000000xx. That is the
> reason for the rather confusing mask in insn 9. Your test program compiles
> and runs fine for me.
I am not familiar with s390 assembly. please correct me if I am wrong:
This is the assembly generated for my testcase:
.globl _Z3fooP1A
.type _Z3fooP1A, @function
_Z3fooP1A:
.LFB0:
larl %r5,.L3
mvi 0(%r2),3 // move 0x00000000.00000003 to 0(%r2)
l %r1,.L4-.L3(%r5) // load 0xff000000 to %r1
n %r1,0(%r2) // %r1 = %r1 & 0(%r2) =
0x00000000.00000000
oill %r1,5 // %r1 = %r1 | 5 = 0x00000000.00000005
st %r1,0(%r2) // store 0x00000000.00000005 to 0(%r2)
br %r14
.section .rodata
.align 8
.L3:
.L4:
.long -16777216
.align 2
.previous
According to the asm sequence above, the result of a should be:
0x00000000.00000005, but the correct result should be 0x00000000.03000005,
right?
