[AArch64][GlobalISel] Add test cases for 128-bit fabs. (NFC)

Author: Him188

llvm/test/CodeGen/AArch64/fabs-fp128.ll

@@ -0,0 +1,58 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-SD
+; RUN: llc -mtriple=aarch64 -global-isel=1 -global-isel-abort=2 -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-GI
+
+; CHECK: warning: Instruction selection used fallback path for fabs_f128
+; CHECK-NEXT: warning: Instruction selection used fallback path for fabs_v1f128
+; CHECK-NEXT: warning: Instruction selection used fallback path for fabs_v2f128
+
+define fp128 @fabs_f128(fp128 %a) {
+; CHECK-LABEL: fabs_f128:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    str q0, [sp, #-16]!
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    ldrb w8, [sp, #15]
+; CHECK-NEXT:    and w8, w8, #0x7f
+; CHECK-NEXT:    strb w8, [sp, #15]
+; CHECK-NEXT:    ldr q0, [sp], #16
+; CHECK-NEXT:    ret
+entry:
+  %c = call fp128 @llvm.fabs.f128(fp128 %a)
+  ret fp128 %c
+}
+
+define <1 x fp128> @fabs_v1f128(<1 x fp128> %a) {
+; CHECK-LABEL: fabs_v1f128:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    str q0, [sp, #-16]!
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    ldrb w8, [sp, #15]
+; CHECK-NEXT:    and w8, w8, #0x7f
+; CHECK-NEXT:    strb w8, [sp, #15]
+; CHECK-NEXT:    ldr q0, [sp], #16
+; CHECK-NEXT:    ret
+entry:
+  %c = call <1 x fp128> @llvm.fabs.v1f128(<1 x fp128> %a)
+  ret <1 x fp128> %c
+}
+
+define <2 x fp128> @fabs_v2f128(<2 x fp128> %a) {
+; CHECK-LABEL: fabs_v2f128:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    stp q0, q1, [sp, #-32]!
+; CHECK-NEXT:    .cfi_def_cfa_offset 32
+; CHECK-NEXT:    ldrb w8, [sp, #15]
+; CHECK-NEXT:    and w8, w8, #0x7f
+; CHECK-NEXT:    strb w8, [sp, #15]
+; CHECK-NEXT:    ldrb w8, [sp, #31]
+; CHECK-NEXT:    and w8, w8, #0x7f
+; CHECK-NEXT:    strb w8, [sp, #31]
+; CHECK-NEXT:    ldp q0, q1, [sp], #32
+; CHECK-NEXT:    ret
+entry:
+  %c = call <2 x fp128> @llvm.fabs.v2f128(<2 x fp128> %a)
+  ret <2 x fp128> %c
+}
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; CHECK-GI: {{.*}}
+; CHECK-SD: {{.*}}