133 lines
3.7 KiB
LLVM
133 lines
3.7 KiB
LLVM
; Test 8-bit atomic subtractions.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT1
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT2
|
|
|
|
; Check subtraction of a variable.
|
|
; - CHECK is for the main loop.
|
|
; - CHECK-SHIFT1 makes sure that the negated shift count used by the second
|
|
; RLL is set up correctly. The negation is independent of the NILL and L
|
|
; tested in CHECK.
|
|
; - CHECK-SHIFT2 makes sure that %b is shifted into the high part of the word
|
|
; before being used. This shift is independent of the other loop prologue
|
|
; instructions.
|
|
define i8 @f1(i8 *%src, i8 %b) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
|
|
; CHECK-DAG: sll %r2, 3
|
|
; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
|
; CHECK: [[LABEL:\.[^:]*]]:
|
|
; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2)
|
|
; CHECK: sr [[ROT]], %r3
|
|
; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}})
|
|
; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
|
; CHECK: jl [[LABEL]]
|
|
; CHECK: rll %r2, [[OLD]], 8(%r2)
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f1:
|
|
; CHECK-SHIFT1: sll %r2, 3
|
|
; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2
|
|
; CHECK-SHIFT1: rll
|
|
; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]])
|
|
; CHECK-SHIFT1: rll
|
|
; CHECK-SHIFT1: br %r14
|
|
;
|
|
; CHECK-SHIFT2-LABEL: f1:
|
|
; CHECK-SHIFT2: sll %r3, 24
|
|
; CHECK-SHIFT2: rll
|
|
; CHECK-SHIFT2: sr {{%r[0-9]+}}, %r3
|
|
; CHECK-SHIFT2: rll
|
|
; CHECK-SHIFT2: rll
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 %b seq_cst
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check the minimum signed value. We add 0x80000000 to the rotated word.
|
|
define i8 @f2(i8 *%src) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
|
|
; CHECK-DAG: sll %r2, 3
|
|
; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
|
|
; CHECK: [[LABEL:\.[^:]*]]:
|
|
; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2)
|
|
; CHECK: afi [[ROT]], -2147483648
|
|
; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]])
|
|
; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]])
|
|
; CHECK: jl [[LABEL]]
|
|
; CHECK: rll %r2, [[OLD]], 8(%r2)
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f2:
|
|
; CHECK-SHIFT1: sll %r2, 3
|
|
; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2
|
|
; CHECK-SHIFT1: rll
|
|
; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]])
|
|
; CHECK-SHIFT1: rll
|
|
; CHECK-SHIFT1: br %r14
|
|
;
|
|
; CHECK-SHIFT2-LABEL: f2:
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 -128 seq_cst
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check subtraction of -1. We add 0x01000000 to the rotated word.
|
|
define i8 @f3(i8 *%src) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: afi [[ROT]], 16777216
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f3:
|
|
; CHECK-SHIFT1: br %r14
|
|
; CHECK-SHIFT2-LABEL: f3:
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 -1 seq_cst
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check subtraction of -1. We add 0xff000000 to the rotated word.
|
|
define i8 @f4(i8 *%src) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: afi [[ROT]], -16777216
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f4:
|
|
; CHECK-SHIFT1: br %r14
|
|
; CHECK-SHIFT2-LABEL: f4:
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 1 seq_cst
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check the maximum signed value. We add 0x81000000 to the rotated word.
|
|
define i8 @f5(i8 *%src) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: afi [[ROT]], -2130706432
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f5:
|
|
; CHECK-SHIFT1: br %r14
|
|
; CHECK-SHIFT2-LABEL: f5:
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 127 seq_cst
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check subtraction of a large unsigned value. We add 0x02000000 to the
|
|
; rotated word.
|
|
define i8 @f6(i8 *%src) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: afi [[ROT]], 33554432
|
|
; CHECK: br %r14
|
|
;
|
|
; CHECK-SHIFT1-LABEL: f6:
|
|
; CHECK-SHIFT1: br %r14
|
|
; CHECK-SHIFT2-LABEL: f6:
|
|
; CHECK-SHIFT2: br %r14
|
|
%res = atomicrmw sub i8 *%src, i8 254 seq_cst
|
|
ret i8 %res
|
|
}
|