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[SystemZ] Add integer absolute (load positive)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188670 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford 2013-08-19 12:48:54 +00:00
parent 80f54784da
commit b0d40a22e5
5 changed files with 168 additions and 1 deletions
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12
lib/Target/SystemZ/SystemZInstrInfo.td
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@ -534,9 +534,19 @@ let neverHasSideEffects = 1, isAsCheapAsAMove = 1, isMoveImm = 1,
}
//===----------------------------------------------------------------------===//
// Negation
// Absolute and Negation
//===----------------------------------------------------------------------===//
let Defs = [CC] in {
let CCValues = 0xF, CompareZeroCCMask = 0x8 in {
def LPR : UnaryRR <"lp", 0x10, z_iabs32, GR32, GR32>;
def LPGR : UnaryRRE<"lpg", 0xB900, z_iabs64, GR64, GR64>;
}
let CCValues = 0xE, CompareZeroCCMask = 0xE in
def LPGFR : UnaryRRE<"lpgf", 0xB910, null_frag, GR64, GR32>;
}
defm : SXU<z_iabs64, LPGFR>;
let Defs = [CC] in {
let CCValues = 0xF, CompareZeroCCMask = 0x8 in {
def LCR : UnaryRR <"lc", 0x13, ineg, GR32, GR32>;

8
lib/Target/SystemZ/SystemZOperators.td
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@ -240,6 +240,14 @@ def or_as_revinserti8 : PatFrag<(ops node:$src1, node:$src2),
APInt::getLowBitsSet(BitWidth, 8));
}]>;
// Integer absolute, matching the canonical form generated by DAGCombiner.
def z_iabs32 : PatFrag<(ops node:$src),
(xor (add node:$src, (sra node:$src, (i32 31))),
(sra node:$src, (i32 31)))>;
def z_iabs64 : PatFrag<(ops node:$src),
(xor (add node:$src, (sra node:$src, (i32 63))),
(sra node:$src, (i32 63)))>;
// Fused multiply-add and multiply-subtract, but with the order of the
// operands matching SystemZ's MA and MS instructions.
def z_fma : PatFrag<(ops node:$src1, node:$src2, node:$src3),

83
test/CodeGen/SystemZ/int-abs-01.ll Normal file
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@ -0,0 +1,83 @@
; Test integer absolute.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Test i32->i32 absolute using slt.
define i32 @f1(i32 %val) {
; CHECK-LABEL: f1:
; CHECK: lpr %r2, %r2
; CHECK: br %r14
%cmp = icmp slt i32 %val, 0
%neg = sub i32 0, %val
%res = select i1 %cmp, i32 %neg, i32 %val
ret i32 %res
}
; Test i32->i32 absolute using sle.
define i32 @f2(i32 %val) {
; CHECK-LABEL: f2:
; CHECK: lpr %r2, %r2
; CHECK: br %r14
%cmp = icmp sle i32 %val, 0
%neg = sub i32 0, %val
%res = select i1 %cmp, i32 %neg, i32 %val
ret i32 %res
}
; Test i32->i32 absolute using sgt.
define i32 @f3(i32 %val) {
; CHECK-LABEL: f3:
; CHECK: lpr %r2, %r2
; CHECK: br %r14
%cmp = icmp sgt i32 %val, 0
%neg = sub i32 0, %val
%res = select i1 %cmp, i32 %val, i32 %neg
ret i32 %res
}
; Test i32->i32 absolute using sge.
define i32 @f4(i32 %val) {
; CHECK-LABEL: f4:
; CHECK: lpr %r2, %r2
; CHECK: br %r14
%cmp = icmp sge i32 %val, 0
%neg = sub i32 0, %val
%res = select i1 %cmp, i32 %val, i32 %neg
ret i32 %res
}
; Test i32->i64 absolute.
define i64 @f5(i32 %val) {
; CHECK-LABEL: f5:
; CHECK: lpgfr %r2, %r2
; CHECK: br %r14
%ext = sext i32 %val to i64
%cmp = icmp slt i64 %ext, 0
%neg = sub i64 0, %ext
%res = select i1 %cmp, i64 %neg, i64 %ext
ret i64 %res
}
; Test i32->i64 absolute that uses an "in-register" form of sign extension.
define i64 @f6(i64 %val) {
; CHECK-LABEL: f6:
; CHECK: lpgfr %r2, %r2
; CHECK: br %r14
%trunc = trunc i64 %val to i32
%ext = sext i32 %trunc to i64
%cmp = icmp slt i64 %ext, 0
%neg = sub i64 0, %ext
%res = select i1 %cmp, i64 %neg, i64 %ext
ret i64 %res
}
; Test i64 absolute.
define i64 @f7(i64 %val) {
; CHECK-LABEL: f7:
; CHECK: lpgr %r2, %r2
; CHECK: br %r14
%cmp = icmp slt i64 %val, 0
%neg = sub i64 0, %val
%res = select i1 %cmp, i64 %neg, i64 %val
ret i64 %res
}

36
test/MC/Disassembler/SystemZ/insns.txt
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@ -3535,6 +3535,42 @@
# CHECK: lpebr %f15, %f9
0xb3 0x00 0x00 0xf9
# CHECK: lpgfr %r0, %r0
0xb9 0x10 0x00 0x00
# CHECK: lpgfr %r0, %r15
0xb9 0x10 0x00 0x0f
# CHECK: lpgfr %r15, %r0
0xb9 0x10 0x00 0xf0
# CHECK: lpgfr %r7, %r8
0xb9 0x10 0x00 0x78
# CHECK: lpgr %r0, %r0
0xb9 0x00 0x00 0x00
# CHECK: lpgr %r0, %r15
0xb9 0x00 0x00 0x0f
# CHECK: lpgr %r15, %r0
0xb9 0x00 0x00 0xf0
# CHECK: lpgr %r7, %r8
0xb9 0x00 0x00 0x78
# CHECK: lpr %r0, %r0
0x10 0x00
# CHECK: lpr %r0, %r15
0x10 0x0f
# CHECK: lpr %r15, %r0
0x10 0xf0
# CHECK: lpr %r7, %r8
0x10 0x78
# CHECK: lpxbr %f0, %f8
0xb3 0x40 0x00 0x08

30
test/MC/SystemZ/insn-good.s
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@ -4757,6 +4757,36 @@
lpebr %f15,%f0
lpebr %f15,%f9
#CHECK: lpgfr %r0, %r0 # encoding: [0xb9,0x10,0x00,0x00]
#CHECK: lpgfr %r0, %r15 # encoding: [0xb9,0x10,0x00,0x0f]
#CHECK: lpgfr %r15, %r0 # encoding: [0xb9,0x10,0x00,0xf0]
#CHECK: lpgfr %r7, %r8 # encoding: [0xb9,0x10,0x00,0x78]
lpgfr %r0,%r0
lpgfr %r0,%r15
lpgfr %r15,%r0
lpgfr %r7,%r8
#CHECK: lpgr %r0, %r0 # encoding: [0xb9,0x00,0x00,0x00]
#CHECK: lpgr %r0, %r15 # encoding: [0xb9,0x00,0x00,0x0f]
#CHECK: lpgr %r15, %r0 # encoding: [0xb9,0x00,0x00,0xf0]
#CHECK: lpgr %r7, %r8 # encoding: [0xb9,0x00,0x00,0x78]
lpgr %r0,%r0
lpgr %r0,%r15
lpgr %r15,%r0
lpgr %r7,%r8
#CHECK: lpr %r0, %r0 # encoding: [0x10,0x00]
#CHECK: lpr %r0, %r15 # encoding: [0x10,0x0f]
#CHECK: lpr %r15, %r0 # encoding: [0x10,0xf0]
#CHECK: lpr %r7, %r8 # encoding: [0x10,0x78]
lpr %r0,%r0
lpr %r0,%r15
lpr %r15,%r0
lpr %r7,%r8
#CHECK: lpxbr %f0, %f8 # encoding: [0xb3,0x40,0x00,0x08]
#CHECK: lpxbr %f0, %f13 # encoding: [0xb3,0x40,0x00,0x0d]
#CHECK: lpxbr %f13, %f0 # encoding: [0xb3,0x40,0x00,0xd0]