[llvm] [X86][FP16] Add tests for inttofp without VLX, NFC (PR #142954)

[Phoebe Wang via llvm-commits]

https://github.com/phoebewang created https://github.com/llvm/llvm-project/pull/142954

None

>From 4b7073bbc90962869019cfe2f831d94c258514bb Mon Sep 17 00:00:00 2001
From: "Wang, Phoebe" <phoebe.wang at intel.com>
Date: Thu, 5 Jun 2025 20:11:45 +0800
Subject: [PATCH] [X86][FP16] Add tests for inttofp without VLX, NFC

---
 llvm/test/CodeGen/X86/avx512fp16-cvt-novl.ll | 118 +++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/avx512fp16-cvt-novl.ll

diff --git a/llvm/test/CodeGen/X86/avx512fp16-cvt-novl.ll b/llvm/test/CodeGen/X86/avx512fp16-cvt-novl.ll
new file mode 100644
index 0000000000000..38c833ee89bc0
--- /dev/null
+++ b/llvm/test/CodeGen/X86/avx512fp16-cvt-novl.ll
@@ -0,0 +1,118 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc < %s -mtriple=x86_64 -mattr=+avx512fp16 | FileCheck %s
+
+define <2 x half> @vector_sint64ToHalf(<2 x i64> %int64) {
+; CHECK-LABEL: vector_sint64ToHalf:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $xmm0 killed $xmm0 def $zmm0
+; CHECK-NEXT:    vcvtqq2ph %zmm0, %xmm0
+; CHECK-NEXT:    vzeroupper
+; CHECK-NEXT:    retq
+    %fp16 = sitofp <2 x i64> %int64 to <2 x half>
+    ret <2 x half> %fp16
+}
+
+define <4 x half> @vector_sint32ToHalf(<4 x i32> %int32) {
+; CHECK-LABEL: vector_sint32ToHalf:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vextractps $3, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm1, %xmm1
+; CHECK-NEXT:    vextractps $2, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm2, %xmm2
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[1],xmm1[1],xmm2[2],xmm1[2],xmm2[3],xmm1[3]
+; CHECK-NEXT:    vextractps $1, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm2
+; CHECK-NEXT:    vmovd %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm0
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3]
+; CHECK-NEXT:    vinsertps {{.*#+}} xmm0 = xmm0[0],xmm1[0],zero,zero
+; CHECK-NEXT:    retq
+    %fp16 = sitofp <4 x i32> %int32 to <4 x half>
+    ret <4 x half> %fp16
+}
+
+define <8 x half> @vector_sint16ToHalf(<8 x i16> %int16) {
+; CHECK-LABEL: vector_sint16ToHalf:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vpextrw $7, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm1, %xmm1
+; CHECK-NEXT:    vpextrw $6, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm2, %xmm2
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[1],xmm1[1],xmm2[2],xmm1[2],xmm2[3],xmm1[3]
+; CHECK-NEXT:    vpextrw $5, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm2
+; CHECK-NEXT:    vpextrw $4, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm3
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm2 = xmm3[0],xmm2[0],xmm3[1],xmm2[1],xmm3[2],xmm2[2],xmm3[3],xmm2[3]
+; CHECK-NEXT:    vpunpckldq {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[1],xmm1[1]
+; CHECK-NEXT:    vpextrw $3, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm2
+; CHECK-NEXT:    vpextrw $2, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm3
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm2 = xmm3[0],xmm2[0],xmm3[1],xmm2[1],xmm3[2],xmm2[2],xmm3[3],xmm2[3]
+; CHECK-NEXT:    vpextrw $1, %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm3
+; CHECK-NEXT:    vmovw %xmm0, %eax
+; CHECK-NEXT:    cwtl
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm0
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm0 = xmm0[0],xmm3[0],xmm0[1],xmm3[1],xmm0[2],xmm3[2],xmm0[3],xmm3[3]
+; CHECK-NEXT:    vpunpckldq {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
+; CHECK-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; CHECK-NEXT:    retq
+    %fp16 = sitofp <8 x i16> %int16 to <8 x half>
+    ret <8 x half> %fp16
+}
+
+define <2 x half> @vector_uint64ToHalf(<2 x i64> %int64) {
+; CHECK-LABEL: vector_uint64ToHalf:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $xmm0 killed $xmm0 def $zmm0
+; CHECK-NEXT:    vcvtuqq2ph %zmm0, %xmm0
+; CHECK-NEXT:    vzeroupper
+; CHECK-NEXT:    retq
+    %fp16 = uitofp <2 x i64> %int64 to <2 x half>
+    ret <2 x half> %fp16
+}
+
+; define <4 x half> @vector_uint32ToHalf(<4 x i32> %int32) {
+;     %fp16 = uitofp <4 x i32> %int32 to <4 x half>
+;     ret <4 x half> %fp16
+; }
+
+define <8 x half> @vector_uint16ToHalf(<8 x i16> %int16) {
+; CHECK-LABEL: vector_uint16ToHalf:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vpextrw $7, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm1, %xmm1
+; CHECK-NEXT:    vpextrw $6, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm2, %xmm2
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[1],xmm1[1],xmm2[2],xmm1[2],xmm2[3],xmm1[3]
+; CHECK-NEXT:    vpextrw $5, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm2
+; CHECK-NEXT:    vpextrw $4, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm3, %xmm3
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm2 = xmm3[0],xmm2[0],xmm3[1],xmm2[1],xmm3[2],xmm2[2],xmm3[3],xmm2[3]
+; CHECK-NEXT:    vpunpckldq {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[1],xmm1[1]
+; CHECK-NEXT:    vpextrw $3, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm2
+; CHECK-NEXT:    vpextrw $2, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm3
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm2 = xmm3[0],xmm2[0],xmm3[1],xmm2[1],xmm3[2],xmm2[2],xmm3[3],xmm2[3]
+; CHECK-NEXT:    vpextrw $1, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm3
+; CHECK-NEXT:    vpextrw $0, %xmm0, %eax
+; CHECK-NEXT:    vcvtsi2sh %eax, %xmm4, %xmm0
+; CHECK-NEXT:    vpunpcklwd {{.*#+}} xmm0 = xmm0[0],xmm3[0],xmm0[1],xmm3[1],xmm0[2],xmm3[2],xmm0[3],xmm3[3]
+; CHECK-NEXT:    vpunpckldq {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
+; CHECK-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; CHECK-NEXT:    retq
+    %fp16 = uitofp <8 x i16> %int16 to <8 x half>
+    ret <8 x half> %fp16
+}