mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 10:42:39 +01:00
150 lines
3.5 KiB
LLVM
150 lines
3.5 KiB
LLVM
; Test 32-bit arithmetic shifts right.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; Check the low end of the SRAG range.
|
|
define i64 @f1(i64 %a) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: srag %r2, %r2, 1
|
|
; CHECK: br %r14
|
|
%shift = ashr i64 %a, 1
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check the high end of the defined SRAG range.
|
|
define i64 @f2(i64 %a) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: srag %r2, %r2, 63
|
|
; CHECK: br %r14
|
|
%shift = ashr i64 %a, 63
|
|
ret i64 %shift
|
|
}
|
|
|
|
; We don't generate shifts by out-of-range values.
|
|
define i64 @f3(i64 %a) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK-NOT: srag
|
|
; CHECK: br %r14
|
|
%shift = ashr i64 %a, 64
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check variable shifts.
|
|
define i64 @f4(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: srag %r2, %r2, 0(%r3)
|
|
; CHECK: br %r14
|
|
%shift = ashr i64 %a, %amt
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check shift amounts that have a constant term.
|
|
define i64 @f5(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: srag %r2, %r2, 10(%r3)
|
|
; CHECK: br %r14
|
|
%add = add i64 %amt, 10
|
|
%shift = ashr i64 %a, %add
|
|
ret i64 %shift
|
|
}
|
|
|
|
; ...and again with a sign-extended 32-bit shift amount.
|
|
define i64 @f6(i64 %a, i32 %amt) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: srag %r2, %r2, 10(%r3)
|
|
; CHECK: br %r14
|
|
%add = add i32 %amt, 10
|
|
%addext = sext i32 %add to i64
|
|
%shift = ashr i64 %a, %addext
|
|
ret i64 %shift
|
|
}
|
|
|
|
; ...and now with a zero-extended 32-bit shift amount.
|
|
define i64 @f7(i64 %a, i32 %amt) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: srag %r2, %r2, 10(%r3)
|
|
; CHECK: br %r14
|
|
%add = add i32 %amt, 10
|
|
%addext = zext i32 %add to i64
|
|
%shift = ashr i64 %a, %addext
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check shift amounts that have the largest in-range constant term. We could
|
|
; mask the amount instead.
|
|
define i64 @f8(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: srag %r2, %r2, 524287(%r3)
|
|
; CHECK: br %r14
|
|
%add = add i64 %amt, 524287
|
|
%shift = ashr i64 %a, %add
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check the next value up, which without masking must use a separate
|
|
; addition.
|
|
define i64 @f9(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: a{{g?}}fi %r3, 524288
|
|
; CHECK: srag %r2, %r2, 0(%r3)
|
|
; CHECK: br %r14
|
|
%add = add i64 %amt, 524288
|
|
%shift = ashr i64 %a, %add
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check cases where 1 is subtracted from the shift amount.
|
|
define i64 @f10(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f10:
|
|
; CHECK: srag %r2, %r2, -1(%r3)
|
|
; CHECK: br %r14
|
|
%sub = sub i64 %amt, 1
|
|
%shift = ashr i64 %a, %sub
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check the lowest value that can be subtracted from the shift amount.
|
|
; Again, we could mask the shift amount instead.
|
|
define i64 @f11(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f11:
|
|
; CHECK: srag %r2, %r2, -524288(%r3)
|
|
; CHECK: br %r14
|
|
%sub = sub i64 %amt, 524288
|
|
%shift = ashr i64 %a, %sub
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check the next value down, which without masking must use a separate
|
|
; addition.
|
|
define i64 @f12(i64 %a, i64 %amt) {
|
|
; CHECK-LABEL: f12:
|
|
; CHECK: a{{g?}}fi %r3, -524289
|
|
; CHECK: srag %r2, %r2, 0(%r3)
|
|
; CHECK: br %r14
|
|
%sub = sub i64 %amt, 524289
|
|
%shift = ashr i64 %a, %sub
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check that we don't try to generate "indexed" shifts.
|
|
define i64 @f13(i64 %a, i64 %b, i64 %c) {
|
|
; CHECK-LABEL: f13:
|
|
; CHECK: a{{g?}}r {{%r3, %r4|%r4, %r3}}
|
|
; CHECK: srag %r2, %r2, 0({{%r[34]}})
|
|
; CHECK: br %r14
|
|
%add = add i64 %b, %c
|
|
%shift = ashr i64 %a, %add
|
|
ret i64 %shift
|
|
}
|
|
|
|
; Check that the shift amount uses an address register. It cannot be in %r0.
|
|
define i64 @f14(i64 %a, i64 *%ptr) {
|
|
; CHECK-LABEL: f14:
|
|
; CHECK: l %r1, 4(%r3)
|
|
; CHECK: srag %r2, %r2, 0(%r1)
|
|
; CHECK: br %r14
|
|
%amt = load i64, i64 *%ptr
|
|
%shift = ashr i64 %a, %amt
|
|
ret i64 %shift
|
|
}
|