[llvm] ARM: Add fp128 ldexp tests (PR #166619)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-arm

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>

This is segregated from the existing ldexp test because
this only works on linux. Without the ldexp call available on
windows, there isn't a fallback legalization path.

---
Full diff: https://github.com/llvm/llvm-project/pull/166619.diff


1 Files Affected:

- (added) llvm/test/CodeGen/ARM/ldexp-fp128.ll (+66) 


``````````diff
diff --git a/llvm/test/CodeGen/ARM/ldexp-fp128.ll b/llvm/test/CodeGen/ARM/ldexp-fp128.ll
new file mode 100644
index 0000000000000..93fcd39e824fb
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/ldexp-fp128.ll
@@ -0,0 +1,66 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc -mtriple=armv7-unknown-linux < %s | FileCheck -check-prefix=LINUX %s
+
+define fp128 @testExpl(fp128 %val, i32 %a) {
+; LINUX-LABEL: testExpl:
+; LINUX:       @ %bb.0:
+; LINUX-NEXT:    push {r11, lr}
+; LINUX-NEXT:    sub sp, sp, #8
+; LINUX-NEXT:    ldr r12, [sp, #16]
+; LINUX-NEXT:    str r12, [sp]
+; LINUX-NEXT:    bl ldexpl
+; LINUX-NEXT:    add sp, sp, #8
+; LINUX-NEXT:    pop {r11, pc}
+  %call = tail call fp128 @ldexpl(fp128 %val, i32 %a)
+  ret fp128 %call
+}
+
+declare fp128 @ldexpl(fp128, i32) memory(none)
+
+define fp128 @test_ldexp_f128_i32(fp128 %val, i32 %a) {
+; LINUX-LABEL: test_ldexp_f128_i32:
+; LINUX:       @ %bb.0:
+; LINUX-NEXT:    push {r11, lr}
+; LINUX-NEXT:    sub sp, sp, #8
+; LINUX-NEXT:    ldr r12, [sp, #16]
+; LINUX-NEXT:    str r12, [sp]
+; LINUX-NEXT:    bl ldexpl
+; LINUX-NEXT:    add sp, sp, #8
+; LINUX-NEXT:    pop {r11, pc}
+  %call = tail call fp128 @llvm.ldexp.f128.i32(fp128 %val, i32 %a)
+  ret fp128 %call
+}
+
+define <2 x fp128> @test_ldexp_v2f128_v2i32(<2 x fp128> %val, <2 x i32> %a) {
+; LINUX-LABEL: test_ldexp_v2f128_v2i32:
+; LINUX:       @ %bb.0:
+; LINUX-NEXT:    push {r4, r5, r6, lr}
+; LINUX-NEXT:    vpush {d8}
+; LINUX-NEXT:    sub sp, sp, #8
+; LINUX-NEXT:    mov r5, r3
+; LINUX-NEXT:    add r3, sp, #40
+; LINUX-NEXT:    mov r6, r2
+; LINUX-NEXT:    mov r4, r0
+; LINUX-NEXT:    ldm r3, {r0, r1, r2, r3}
+; LINUX-NEXT:    vldr d8, [sp, #56]
+; LINUX-NEXT:    vst1.32 {d8[1]}, [sp:32]
+; LINUX-NEXT:    bl ldexpl
+; LINUX-NEXT:    ldr r12, [sp, #32]
+; LINUX-NEXT:    vst1.32 {d8[0]}, [sp:32]
+; LINUX-NEXT:    ldr lr, [sp, #36]
+; LINUX-NEXT:    str r0, [r4, #16]
+; LINUX-NEXT:    mov r0, r6
+; LINUX-NEXT:    str r1, [r4, #20]
+; LINUX-NEXT:    mov r1, r5
+; LINUX-NEXT:    str r2, [r4, #24]
+; LINUX-NEXT:    mov r2, r12
+; LINUX-NEXT:    str r3, [r4, #28]
+; LINUX-NEXT:    mov r3, lr
+; LINUX-NEXT:    bl ldexpl
+; LINUX-NEXT:    stm r4, {r0, r1, r2, r3}
+; LINUX-NEXT:    add sp, sp, #8
+; LINUX-NEXT:    vpop {d8}
+; LINUX-NEXT:    pop {r4, r5, r6, pc}
+  %call = tail call <2 x fp128> @llvm.ldexp.v2f128.v2i32(<2 x fp128> %val, <2 x i32> %a)
+  ret <2 x fp128> %call
+}

``````````

</details>


https://github.com/llvm/llvm-project/pull/166619