xbfiz.ll
1.41 KB
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; RUN: llc -mtriple=arm64-apple-ios < %s | FileCheck %s
define i64 @sbfiz64(i64 %v) {
; CHECK-LABEL: sbfiz64:
; CHECK: sbfiz x0, x0, #1, #16
%shl = shl i64 %v, 48
%shr = ashr i64 %shl, 47
ret i64 %shr
}
define i32 @sbfiz32(i32 %v) {
; CHECK-LABEL: sbfiz32:
; CHECK: sbfiz w0, w0, #1, #14
%shl = shl i32 %v, 18
%shr = ashr i32 %shl, 17
ret i32 %shr
}
define i64 @ubfiz64(i64 %v) {
; CHECK-LABEL: ubfiz64:
; CHECK: ubfiz x0, x0, #36, #11
%shl = shl i64 %v, 53
%shr = lshr i64 %shl, 17
ret i64 %shr
}
define i32 @ubfiz32(i32 %v) {
; CHECK-LABEL: ubfiz32:
; CHECK: ubfiz w0, w0, #6, #24
%shl = shl i32 %v, 8
%shr = lshr i32 %shl, 2
ret i32 %shr
}
define i64 @ubfiz64and(i64 %v) {
; CHECK-LABEL: ubfiz64and:
; CHECK: ubfiz x0, x0, #36, #11
%shl = shl i64 %v, 36
%and = and i64 %shl, 140668768878592
ret i64 %and
}
define i32 @ubfiz32and(i32 %v) {
; CHECK-LABEL: ubfiz32and:
; CHECK: ubfiz w0, w0, #6, #24
%shl = shl i32 %v, 6
%and = and i32 %shl, 1073741760
ret i32 %and
}
; Check that we don't generate a ubfiz if the lsl has more than one
; use, since we'd just be replacing an and with a ubfiz.
define i32 @noubfiz32(i32 %v) {
; CHECK-LABEL: noubfiz32:
; CHECK: lsl w[[REG1:[0-9]+]], w0, #6
; CHECK: and w[[REG2:[0-9]+]], w[[REG1]], #0x3fffffc0
; CHECK: add w0, w[[REG1]], w[[REG2]]
; CHECK: ret
%shl = shl i32 %v, 6
%and = and i32 %shl, 1073741760
%add = add i32 %shl, %and
ret i32 %add
}