[llvm] 8e6a05d - [WebAssembly] Added vectorized version of fexp10 to the supported list (#150564)

[via llvm-commits]

Author: Jasmine Tang
Date: 2025-07-25T12:30:59-07:00
New Revision: 8e6a05d4712c3e134737d1584da90854a72bd84d

URL: https://github.com/llvm/llvm-project/commit/8e6a05d4712c3e134737d1584da90854a72bd84d
DIFF: https://github.com/llvm/llvm-project/commit/8e6a05d4712c3e134737d1584da90854a72bd84d.diff

LOG: [WebAssembly] Added vectorized version of fexp10 to the supported list (#150564)

Fixes https://github.com/llvm/llvm-project/issues/117200.

The default behavior in TargetLoweringBase is only scalar floats on fexp
are supported by default, not the vectorized version. This PR adds
`ISD::FEXP10` to the supported list.

Added: 
    llvm/test/CodeGen/WebAssembly/libcall_vectorized.ll

Modified: 
    llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index 11936a32937af..cd434f7a331e4 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -288,7 +288,7 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
 
     // Expand float operations supported for scalars but not SIMD
     for (auto Op : {ISD::FCOPYSIGN, ISD::FLOG, ISD::FLOG2, ISD::FLOG10,
-                    ISD::FEXP, ISD::FEXP2})
+                    ISD::FEXP, ISD::FEXP2, ISD::FEXP10})
       for (auto T : {MVT::v4f32, MVT::v2f64})
         setOperationAction(Op, T, Expand);
 

diff  --git a/llvm/test/CodeGen/WebAssembly/libcall_vectorized.ll b/llvm/test/CodeGen/WebAssembly/libcall_vectorized.ll
new file mode 100644
index 0000000000000..2d1056fb44938
--- /dev/null
+++ b/llvm/test/CodeGen/WebAssembly/libcall_vectorized.ll
@@ -0,0 +1,33 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+
+; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-keep-registers  -mattr=+simd128 | FileCheck %s
+
+target triple = "wasm32-unknown-unknown"
+
+declare <4 x float> @llvm.exp10.v4f32(<4 x float>)
+
+define <4 x float> @exp10_f32v4(<4 x float> %v) {
+; CHECK-LABEL: exp10_f32v4:
+; CHECK:         .functype exp10_f32v4 (v128) -> (v128)
+; CHECK-NEXT:  # %bb.0: # %entry
+; CHECK-NEXT:    local.get $push12=, 0
+; CHECK-NEXT:    f32x4.extract_lane $push0=, $pop12, 0
+; CHECK-NEXT:    call $push1=, exp10f, $pop0
+; CHECK-NEXT:    f32x4.splat $push2=, $pop1
+; CHECK-NEXT:    local.get $push13=, 0
+; CHECK-NEXT:    f32x4.extract_lane $push3=, $pop13, 1
+; CHECK-NEXT:    call $push4=, exp10f, $pop3
+; CHECK-NEXT:    f32x4.replace_lane $push5=, $pop2, 1, $pop4
+; CHECK-NEXT:    local.get $push14=, 0
+; CHECK-NEXT:    f32x4.extract_lane $push6=, $pop14, 2
+; CHECK-NEXT:    call $push7=, exp10f, $pop6
+; CHECK-NEXT:    f32x4.replace_lane $push8=, $pop5, 2, $pop7
+; CHECK-NEXT:    local.get $push15=, 0
+; CHECK-NEXT:    f32x4.extract_lane $push9=, $pop15, 3
+; CHECK-NEXT:    call $push10=, exp10f, $pop9
+; CHECK-NEXT:    f32x4.replace_lane $push11=, $pop8, 3, $pop10
+; CHECK-NEXT:    return $pop11
+entry:
+  %r = call <4 x float> @llvm.exp10.v4f32(<4 x float> %v)
+  ret <4 x float> %r
+}