[clang] [llvm] [RISCV][P-ext] Support Packed Slide (PR #234629)

Hongyu Chen via cfe-commits cfe-commits at lists.llvm.org
Thu Oct 22 06:49:09 PDT 2026


https://github.com/XChy created https://github.com/llvm/llvm-project/pull/234629

This patch supports packed slide intrinsics using funnel shifts. 
On RV32, the 64-bit funnel shift expands into select instructions, so it involves branches.
I will try to merge these branches for better codegen in a follow-up.

>From 548fbc41a75bf558fd46f4e443978719c45ecece Mon Sep 17 00:00:00 2001
From: XChy <xxs_chy at outlook.com>
Date: Fri, 16 Oct 2026 17:26:48 +0800
Subject: [PATCH] [RISCV][P-ext] Support Packed Slide

---
 clang/lib/Headers/riscv_packed_simd.h         |  44 ++
 clang/test/CodeGen/RISCV/rvp-intrinsics.c     | 391 ++++++++++++++++++
 .../riscv_packed_simd.c                       | 132 ++++++
 llvm/test/CodeGen/RISCV/rvp-simd-32.ll        |  90 ++++
 llvm/test/CodeGen/RISCV/rvp-simd-64.ll        | 204 +++++++++
 5 files changed, 861 insertions(+)

diff --git a/clang/lib/Headers/riscv_packed_simd.h b/clang/lib/Headers/riscv_packed_simd.h
index c91cf66d0b31af..37cbecf286e1f4 100644
--- a/clang/lib/Headers/riscv_packed_simd.h
+++ b/clang/lib/Headers/riscv_packed_simd.h
@@ -179,6 +179,24 @@ typedef uint32_t uint32x2_t __attribute__((__vector_size__(8)));
     return __builtin_elementwise_fshr(__rs1, __rd, (ty)__shamt);               \
   }
 
+#define __packed_slideupx(name, ty, bits_ty, log2_elt_bits)                    \
+  static __inline__ ty __DEFAULT_FN_ATTRS __riscv_##name(ty __rd, ty __rs1,    \
+                                                         unsigned __rs2) {     \
+    bits_ty __bits = __builtin_elementwise_fshl(                               \
+        __builtin_bit_cast(bits_ty, __rd), __builtin_bit_cast(bits_ty, __rs1), \
+        (bits_ty)__rs2 << (log2_elt_bits));                                    \
+    return __builtin_bit_cast(ty, __bits);                                     \
+  }
+
+#define __packed_slidedownx(name, ty, bits_ty, log2_elt_bits)                  \
+  static __inline__ ty __DEFAULT_FN_ATTRS __riscv_##name(ty __rd, ty __rs1,    \
+                                                         unsigned __rs2) {     \
+    bits_ty __bits = __builtin_elementwise_fshr(                               \
+        __builtin_bit_cast(bits_ty, __rs1), __builtin_bit_cast(bits_ty, __rd), \
+        (bits_ty)__rs2 << (log2_elt_bits));                                    \
+    return __builtin_bit_cast(ty, __bits);                                     \
+  }
+
 #define __packed_widen_convert(name, rty, ty)                                  \
   static __inline__ rty __DEFAULT_FN_ATTRS __riscv_##name(ty __rs1) {          \
     return __builtin_convertvector(__rs1, rty);                                \
@@ -1446,6 +1464,30 @@ __packed_slide1(pslide1down_u16x4, uint16x4_t, uint16_t, 1, 2, 3, 4)
 __packed_slide1(pslide1down_i32x2, int32x2_t, int32_t, 1, 2)
 __packed_slide1(pslide1down_u32x2, uint32x2_t, uint32_t, 1, 2)
 
+/* Packed Slide (32-bit) */
+__packed_slideupx(pslideupx_i8x4, int8x4_t, uint32_t, 3)
+__packed_slideupx(pslideupx_u8x4, uint8x4_t, uint32_t, 3)
+__packed_slideupx(pslideupx_i16x2, int16x2_t, uint32_t, 4)
+__packed_slideupx(pslideupx_u16x2, uint16x2_t, uint32_t, 4)
+__packed_slidedownx(pslidedownx_i8x4, int8x4_t, uint32_t, 3)
+__packed_slidedownx(pslidedownx_u8x4, uint8x4_t, uint32_t, 3)
+__packed_slidedownx(pslidedownx_i16x2, int16x2_t, uint32_t, 4)
+__packed_slidedownx(pslidedownx_u16x2, uint16x2_t, uint32_t, 4)
+
+/* Packed Slide (64-bit) */
+__packed_slideupx(pslideupx_i8x8, int8x8_t, uint64_t, 3)
+__packed_slideupx(pslideupx_u8x8, uint8x8_t, uint64_t, 3)
+__packed_slideupx(pslideupx_i16x4, int16x4_t, uint64_t, 4)
+__packed_slideupx(pslideupx_u16x4, uint16x4_t, uint64_t, 4)
+__packed_slideupx(pslideupx_i32x2, int32x2_t, uint64_t, 5)
+__packed_slideupx(pslideupx_u32x2, uint32x2_t, uint64_t, 5)
+__packed_slidedownx(pslidedownx_i8x8, int8x8_t, uint64_t, 3)
+__packed_slidedownx(pslidedownx_u8x8, uint8x8_t, uint64_t, 3)
+__packed_slidedownx(pslidedownx_i16x4, int16x4_t, uint64_t, 4)
+__packed_slidedownx(pslidedownx_u16x4, uint16x4_t, uint64_t, 4)
+__packed_slidedownx(pslidedownx_i32x2, int32x2_t, uint64_t, 5)
+__packed_slidedownx(pslidedownx_u32x2, uint32x2_t, uint64_t, 5)
+
 /* Packed Subvector Extract */
 __packed_subvector_extract8(pget_i8x8_i8x4, int8x4_t, int8x8_t)
 __packed_subvector_extract8(pget_u8x8_u8x4, uint8x4_t, uint8x8_t)
@@ -1647,6 +1689,8 @@ __packed_reinterpret(u32x2_i32x2, int32x2_t, uint32x2_t)
 #undef __packed_cls
 #undef __packed_slx
 #undef __packed_srx
+#undef __packed_slideupx
+#undef __packed_slidedownx
 #undef __packed_widen_convert
 #undef __packed_widen_binary_op
 #undef __packed_widen_binary_acc_op
diff --git a/clang/test/CodeGen/RISCV/rvp-intrinsics.c b/clang/test/CodeGen/RISCV/rvp-intrinsics.c
index 2233e5835ea1e7..ef479a04af5dc2 100644
--- a/clang/test/CodeGen/RISCV/rvp-intrinsics.c
+++ b/clang/test/CodeGen/RISCV/rvp-intrinsics.c
@@ -10224,3 +10224,394 @@ int64_t test_pm2wsuba_x_i64(int64_t rd, int16x2_t rs1, int16x2_t rs2) {
 int64_t test_pm2waddasu_i64(int64_t rd, int16x2_t rs1, uint16x2_t rs2) {
   return __riscv_pm2waddasu_i64(rd, rs1, rs2);
 }
+
+/* Packed Slide (32-bit) */
+
+// RV32-LABEL: define dso_local i32 @test_pslideupx_i8x4(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslideupx_i8x4(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+int8x4_t test_pslideupx_i8x4(int8x4_t rd, int8x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i8x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslideupx_u8x4(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslideupx_u8x4(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+uint8x4_t test_pslideupx_u8x4(uint8x4_t rd, uint8x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u8x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslideupx_i16x2(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslideupx_i16x2(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+int16x2_t test_pslideupx_i16x2(int16x2_t rd, int16x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i16x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslideupx_u16x2(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslideupx_u16x2(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshl.i32(i32 [[RD_COERCE]], i32 [[RS1_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+uint16x2_t test_pslideupx_u16x2(uint16x2_t rd, uint16x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u16x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslidedownx_i8x4(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslidedownx_i8x4(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+int8x4_t test_pslidedownx_i8x4(int8x4_t rd, int8x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i8x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslidedownx_u8x4(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslidedownx_u8x4(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+uint8x4_t test_pslidedownx_u8x4(uint8x4_t rd, uint8x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u8x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslidedownx_i16x2(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslidedownx_i16x2(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+int16x2_t test_pslidedownx_i16x2(int16x2_t rd, int16x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i16x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i32 @test_pslidedownx_u16x2(
+// RV32-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV32-NEXT:    ret i32 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i32 @test_pslidedownx_u16x2(
+// RV64-SAME: i32 noundef [[RD_COERCE:%.*]], i32 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[SHL_I:%.*]] = shl i32 [[RS2]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i32 @llvm.fshr.i32(i32 [[RS1_COERCE]], i32 [[RD_COERCE]], i32 [[SHL_I]])
+// RV64-NEXT:    ret i32 [[TMP0]]
+//
+uint16x2_t test_pslidedownx_u16x2(uint16x2_t rd, uint16x2_t rs1,
+                                  unsigned rs2) {
+  return __riscv_pslidedownx_u16x2(rd, rs1, rs2);
+}
+
+/* Packed Slide (64-bit) */
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_i8x8(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_i8x8(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int8x8_t test_pslideupx_i8x8(int8x8_t rd, int8x8_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i8x8(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_u8x8(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_u8x8(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint8x8_t test_pslideupx_u8x8(uint8x8_t rd, uint8x8_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u8x8(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_i16x4(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_i16x4(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int16x4_t test_pslideupx_i16x4(int16x4_t rd, int16x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i16x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_u16x4(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_u16x4(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint16x4_t test_pslideupx_u16x4(uint16x4_t rd, uint16x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u16x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_i32x2(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_i32x2(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int32x2_t test_pslideupx_i32x2(int32x2_t rd, int32x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i32x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslideupx_u32x2(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslideupx_u32x2(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshl.i64(i64 [[RD_COERCE]], i64 [[RS1_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint32x2_t test_pslideupx_u32x2(uint32x2_t rd, uint32x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u32x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_i8x8(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_i8x8(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int8x8_t test_pslidedownx_i8x8(int8x8_t rd, int8x8_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i8x8(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_u8x8(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_u8x8(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 3
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint8x8_t test_pslidedownx_u8x8(uint8x8_t rd, uint8x8_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u8x8(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_i16x4(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_i16x4(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int16x4_t test_pslidedownx_i16x4(int16x4_t rd, int16x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i16x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_u16x4(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_u16x4(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 4
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint16x4_t test_pslidedownx_u16x4(uint16x4_t rd, uint16x4_t rs1,
+                                  unsigned rs2) {
+  return __riscv_pslidedownx_u16x4(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_i32x2(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_i32x2(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+int32x2_t test_pslidedownx_i32x2(int32x2_t rd, int32x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i32x2(rd, rs1, rs2);
+}
+
+// RV32-LABEL: define dso_local i64 @test_pslidedownx_u32x2(
+// RV32-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef [[RS2:%.*]]) #[[ATTR0]] {
+// RV32-NEXT:  [[ENTRY:.*:]]
+// RV32-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV32-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV32-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV32-NEXT:    ret i64 [[TMP0]]
+//
+// RV64-LABEL: define dso_local i64 @test_pslidedownx_u32x2(
+// RV64-SAME: i64 noundef [[RD_COERCE:%.*]], i64 noundef [[RS1_COERCE:%.*]], i32 noundef signext [[RS2:%.*]]) #[[ATTR0]] {
+// RV64-NEXT:  [[ENTRY:.*:]]
+// RV64-NEXT:    [[CONV_I:%.*]] = zext i32 [[RS2]] to i64
+// RV64-NEXT:    [[SHL_I:%.*]] = shl nuw nsw i64 [[CONV_I]], 5
+// RV64-NEXT:    [[TMP0:%.*]] = call i64 @llvm.fshr.i64(i64 [[RS1_COERCE]], i64 [[RD_COERCE]], i64 [[SHL_I]])
+// RV64-NEXT:    ret i64 [[TMP0]]
+//
+uint32x2_t test_pslidedownx_u32x2(uint32x2_t rd, uint32x2_t rs1,
+                                  unsigned rs2) {
+  return __riscv_pslidedownx_u32x2(rd, rs1, rs2);
+}
diff --git a/cross-project-tests/intrinsic-header-tests/riscv_packed_simd.c b/cross-project-tests/intrinsic-header-tests/riscv_packed_simd.c
index 526ba7bd3c630f..35474265ef3e60 100644
--- a/cross-project-tests/intrinsic-header-tests/riscv_packed_simd.c
+++ b/cross-project-tests/intrinsic-header-tests/riscv_packed_simd.c
@@ -6063,3 +6063,135 @@ int32x2_t test_pslide1down_i32x2(int32x2_t rd, int32_t rs1) {
 uint32x2_t test_pslide1down_u32x2(uint32x2_t rd, uint32_t rs1) {
   return __riscv_pslide1down_u32x2(rd, rs1);
 }
+
+/* Packed Slide (32-bit) */
+
+// CHECK-LABEL: test_pslideupx_i8x4:
+// CHECK:         slx
+int8x4_t test_pslideupx_i8x4(int8x4_t rd, int8x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i8x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_u8x4:
+// CHECK:         slx
+uint8x4_t test_pslideupx_u8x4(uint8x4_t rd, uint8x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u8x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_i16x2:
+// CHECK:         slx
+int16x2_t test_pslideupx_i16x2(int16x2_t rd, int16x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i16x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_u16x2:
+// CHECK:         slx
+uint16x2_t test_pslideupx_u16x2(uint16x2_t rd, uint16x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u16x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_i8x4:
+// RV32:         srx
+// RV64:         pack
+// RV64:         srl
+int8x4_t test_pslidedownx_i8x4(int8x4_t rd, int8x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i8x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_u8x4:
+// RV32:         srx
+// RV64:         pack
+// RV64:         srl
+uint8x4_t test_pslidedownx_u8x4(uint8x4_t rd, uint8x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u8x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_i16x2:
+// RV32:         srx
+// RV64:         pack
+// RV64:         srl
+int16x2_t test_pslidedownx_i16x2(int16x2_t rd, int16x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i16x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_u16x2:
+// RV32:         srx
+// RV64:         pack
+// RV64:         srl
+uint16x2_t test_pslidedownx_u16x2(uint16x2_t rd, uint16x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u16x2(rd, rs1, rs2);
+}
+
+/* Packed Slide (64-bit) */
+
+// CHECK-LABEL: test_pslideupx_i8x8:
+// CHECK:         slx
+int8x8_t test_pslideupx_i8x8(int8x8_t rd, int8x8_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i8x8(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_u8x8:
+// CHECK:         slx
+uint8x8_t test_pslideupx_u8x8(uint8x8_t rd, uint8x8_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u8x8(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_i16x4:
+// CHECK:         slx
+int16x4_t test_pslideupx_i16x4(int16x4_t rd, int16x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i16x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_u16x4:
+// CHECK:         slx
+uint16x4_t test_pslideupx_u16x4(uint16x4_t rd, uint16x4_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u16x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_i32x2:
+// RV64:         slx
+int32x2_t test_pslideupx_i32x2(int32x2_t rd, int32x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_i32x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslideupx_u32x2:
+// RV64:         slx
+uint32x2_t test_pslideupx_u32x2(uint32x2_t rd, uint32x2_t rs1, unsigned rs2) {
+  return __riscv_pslideupx_u32x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_i8x8:
+// CHECK:         srx
+int8x8_t test_pslidedownx_i8x8(int8x8_t rd, int8x8_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i8x8(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_u8x8:
+// CHECK:         srx
+uint8x8_t test_pslidedownx_u8x8(uint8x8_t rd, uint8x8_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u8x8(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_i16x4:
+// CHECK:         srx
+int16x4_t test_pslidedownx_i16x4(int16x4_t rd, int16x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i16x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_u16x4:
+// CHECK:         srx
+uint16x4_t test_pslidedownx_u16x4(uint16x4_t rd, uint16x4_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u16x4(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_i32x2:
+// RV64:         srx
+int32x2_t test_pslidedownx_i32x2(int32x2_t rd, int32x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_i32x2(rd, rs1, rs2);
+}
+
+// CHECK-LABEL: test_pslidedownx_u32x2:
+// RV64:         srx
+uint32x2_t test_pslidedownx_u32x2(uint32x2_t rd, uint32x2_t rs1, unsigned rs2) {
+  return __riscv_pslidedownx_u32x2(rd, rs1, rs2);
+}
diff --git a/llvm/test/CodeGen/RISCV/rvp-simd-32.ll b/llvm/test/CodeGen/RISCV/rvp-simd-32.ll
index 4c9279872cdcff..202d0959b424a9 100644
--- a/llvm/test/CodeGen/RISCV/rvp-simd-32.ll
+++ b/llvm/test/CodeGen/RISCV/rvp-simd-32.ll
@@ -4150,3 +4150,93 @@ define <2 x i16> @test_pslide1down_v2i16(<2 x i16> %rd, i16 %rs1) {
   %res = shufflevector <2 x i16> %rd, <2 x i16> %scalar, <2 x i32> <i32 1, i32 2>
   ret <2 x i16> %res
 }
+
+define <4 x i8> @test_pslideupx_v4i8(<4 x i8> %rd, <4 x i8> %rs1, i32 %rs2) {
+; RV32-LABEL: test_pslideupx_v4i8:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a2, a2, 3
+; RV32-NEXT:    slx a0, a1, a2
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslideupx_v4i8:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 3
+; RV64-NEXT:    slli a1, a1, 32
+; RV64-NEXT:    andi a2, a2, 24
+; RV64-NEXT:    slx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <4 x i8> %rd to i32
+  %rs1.bits = bitcast <4 x i8> %rs1 to i32
+  %shamt = shl i32 %rs2, 3
+  %res.bits = call i32 @llvm.fshl.i32(i32 %rd.bits, i32 %rs1.bits, i32 %shamt)
+  %res = bitcast i32 %res.bits to <4 x i8>
+  ret <4 x i8> %res
+}
+
+define <4 x i8> @test_pslidedownx_v4i8(<4 x i8> %rd, <4 x i8> %rs1, i32 %rs2) {
+; RV32-LABEL: test_pslidedownx_v4i8:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a2, a2, 3
+; RV32-NEXT:    srx a0, a1, a2
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslidedownx_v4i8:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 3
+; RV64-NEXT:    slli a0, a0, 32
+; RV64-NEXT:    ori a2, a2, 32
+; RV64-NEXT:    srx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <4 x i8> %rd to i32
+  %rs1.bits = bitcast <4 x i8> %rs1 to i32
+  %shamt = shl i32 %rs2, 3
+  %res.bits = call i32 @llvm.fshr.i32(i32 %rs1.bits, i32 %rd.bits, i32 %shamt)
+  %res = bitcast i32 %res.bits to <4 x i8>
+  ret <4 x i8> %res
+}
+
+define <2 x i16> @test_pslideupx_v2i16(<2 x i16> %rd, <2 x i16> %rs1,
+                                       i32 %rs2) {
+; RV32-LABEL: test_pslideupx_v2i16:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a2, a2, 4
+; RV32-NEXT:    slx a0, a1, a2
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslideupx_v2i16:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 4
+; RV64-NEXT:    slli a1, a1, 32
+; RV64-NEXT:    andi a2, a2, 16
+; RV64-NEXT:    slx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <2 x i16> %rd to i32
+  %rs1.bits = bitcast <2 x i16> %rs1 to i32
+  %shamt = shl i32 %rs2, 4
+  %res.bits = call i32 @llvm.fshl.i32(i32 %rd.bits, i32 %rs1.bits, i32 %shamt)
+  %res = bitcast i32 %res.bits to <2 x i16>
+  ret <2 x i16> %res
+}
+
+define <2 x i16> @test_pslidedownx_v2i16(<2 x i16> %rd, <2 x i16> %rs1,
+                                         i32 %rs2) {
+; RV32-LABEL: test_pslidedownx_v2i16:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a2, a2, 4
+; RV32-NEXT:    srx a0, a1, a2
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslidedownx_v2i16:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 4
+; RV64-NEXT:    slli a0, a0, 32
+; RV64-NEXT:    ori a2, a2, 32
+; RV64-NEXT:    srx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <2 x i16> %rd to i32
+  %rs1.bits = bitcast <2 x i16> %rs1 to i32
+  %shamt = shl i32 %rs2, 4
+  %res.bits = call i32 @llvm.fshr.i32(i32 %rs1.bits, i32 %rd.bits, i32 %shamt)
+  %res = bitcast i32 %res.bits to <2 x i16>
+  ret <2 x i16> %res
+}
diff --git a/llvm/test/CodeGen/RISCV/rvp-simd-64.ll b/llvm/test/CodeGen/RISCV/rvp-simd-64.ll
index e79a69131e7b89..8d26dffca25474 100644
--- a/llvm/test/CodeGen/RISCV/rvp-simd-64.ll
+++ b/llvm/test/CodeGen/RISCV/rvp-simd-64.ll
@@ -9037,3 +9037,207 @@ define <2 x i32> @test_pslide1down_v2i32(<2 x i32> %rd, i32 %rs1) {
   %res = shufflevector <2 x i32> %rd, <2 x i32> %scalar, <2 x i32> <i32 1, i32 2>
   ret <2 x i32> %res
 }
+
+define <8 x i8> @test_pslideupx_v8i8(<8 x i8> %rd, <8 x i8> %rs1, i32 %rs2) {
+; RV32-LABEL: test_pslideupx_v8i8:
+; RV32:       # %bb.0:
+; RV32-NEXT:    mv a5, a0
+; RV32-NEXT:    slli a0, a4, 29
+; RV32-NEXT:    srli a6, a0, 31
+; RV32-NEXT:    slli a4, a4, 3
+; RV32-NEXT:    bnez a6, .LBB513_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a0, a5
+; RV32-NEXT:    mv a5, a1
+; RV32-NEXT:    slx a5, a0, a4
+; RV32-NEXT:    beqz a6, .LBB513_3
+; RV32-NEXT:    j .LBB513_4
+; RV32-NEXT:  .LBB513_2:
+; RV32-NEXT:    mv a0, a3
+; RV32-NEXT:    slx a5, a3, a4
+; RV32-NEXT:    bnez a6, .LBB513_4
+; RV32-NEXT:  .LBB513_3:
+; RV32-NEXT:    mv a2, a3
+; RV32-NEXT:  .LBB513_4:
+; RV32-NEXT:    slx a0, a2, a4
+; RV32-NEXT:    mv a1, a5
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslideupx_v8i8:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 3
+; RV64-NEXT:    slx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <8 x i8> %rd to i64
+  %rs1.bits = bitcast <8 x i8> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 3
+  %res.bits = call i64 @llvm.fshl.i64(i64 %rd.bits, i64 %rs1.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <8 x i8>
+  ret <8 x i8> %res
+}
+
+define <8 x i8> @test_pslidedownx_v8i8(<8 x i8> %rd, <8 x i8> %rs1,
+                                       i32 %rs2) {
+; RV32-LABEL: test_pslidedownx_v8i8:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a5, a4, 3
+; RV32-NEXT:    andi a6, a5, 32
+; RV32-NEXT:    bnez a6, .LBB514_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a3, a2
+; RV32-NEXT:    mv a2, a1
+; RV32-NEXT:  .LBB514_2:
+; RV32-NEXT:    mv a4, a2
+; RV32-NEXT:    srx a4, a3, a5
+; RV32-NEXT:    beqz a6, .LBB514_4
+; RV32-NEXT:  # %bb.3:
+; RV32-NEXT:    mv a0, a1
+; RV32-NEXT:  .LBB514_4:
+; RV32-NEXT:    srx a0, a2, a5
+; RV32-NEXT:    mv a1, a4
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslidedownx_v8i8:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 3
+; RV64-NEXT:    srx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <8 x i8> %rd to i64
+  %rs1.bits = bitcast <8 x i8> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 3
+  %res.bits = call i64 @llvm.fshr.i64(i64 %rs1.bits, i64 %rd.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <8 x i8>
+  ret <8 x i8> %res
+}
+
+define <4 x i16> @test_pslideupx_v4i16(<4 x i16> %rd, <4 x i16> %rs1,
+                                       i32 %rs2) {
+; RV32-LABEL: test_pslideupx_v4i16:
+; RV32:       # %bb.0:
+; RV32-NEXT:    mv a5, a0
+; RV32-NEXT:    slli a0, a4, 30
+; RV32-NEXT:    srli a6, a0, 31
+; RV32-NEXT:    slli a4, a4, 4
+; RV32-NEXT:    bnez a6, .LBB515_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a0, a5
+; RV32-NEXT:    mv a5, a1
+; RV32-NEXT:    slx a5, a0, a4
+; RV32-NEXT:    beqz a6, .LBB515_3
+; RV32-NEXT:    j .LBB515_4
+; RV32-NEXT:  .LBB515_2:
+; RV32-NEXT:    mv a0, a3
+; RV32-NEXT:    slx a5, a3, a4
+; RV32-NEXT:    bnez a6, .LBB515_4
+; RV32-NEXT:  .LBB515_3:
+; RV32-NEXT:    mv a2, a3
+; RV32-NEXT:  .LBB515_4:
+; RV32-NEXT:    slx a0, a2, a4
+; RV32-NEXT:    mv a1, a5
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslideupx_v4i16:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 4
+; RV64-NEXT:    slx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <4 x i16> %rd to i64
+  %rs1.bits = bitcast <4 x i16> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 4
+  %res.bits = call i64 @llvm.fshl.i64(i64 %rd.bits, i64 %rs1.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <4 x i16>
+  ret <4 x i16> %res
+}
+
+define <4 x i16> @test_pslidedownx_v4i16(<4 x i16> %rd, <4 x i16> %rs1,
+                                         i32 %rs2) {
+; RV32-LABEL: test_pslidedownx_v4i16:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a5, a4, 4
+; RV32-NEXT:    andi a6, a5, 32
+; RV32-NEXT:    bnez a6, .LBB516_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a3, a2
+; RV32-NEXT:    mv a2, a1
+; RV32-NEXT:  .LBB516_2:
+; RV32-NEXT:    mv a4, a2
+; RV32-NEXT:    srx a4, a3, a5
+; RV32-NEXT:    beqz a6, .LBB516_4
+; RV32-NEXT:  # %bb.3:
+; RV32-NEXT:    mv a0, a1
+; RV32-NEXT:  .LBB516_4:
+; RV32-NEXT:    srx a0, a2, a5
+; RV32-NEXT:    mv a1, a4
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslidedownx_v4i16:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 4
+; RV64-NEXT:    srx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <4 x i16> %rd to i64
+  %rs1.bits = bitcast <4 x i16> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 4
+  %res.bits = call i64 @llvm.fshr.i64(i64 %rs1.bits, i64 %rd.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <4 x i16>
+  ret <4 x i16> %res
+}
+
+define <2 x i32> @test_pslideupx_v2i32(<2 x i32> %rd, <2 x i32> %rs1,
+                                       i32 %rs2) {
+; RV32-LABEL: test_pslideupx_v2i32:
+; RV32:       # %bb.0:
+; RV32-NEXT:    andi a4, a4, 1
+; RV32-NEXT:    beqz a4, .LBB517_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a1, a0
+; RV32-NEXT:    mv a0, a3
+; RV32-NEXT:  .LBB517_2:
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslideupx_v2i32:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 5
+; RV64-NEXT:    slx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <2 x i32> %rd to i64
+  %rs1.bits = bitcast <2 x i32> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 5
+  %res.bits = call i64 @llvm.fshl.i64(i64 %rd.bits, i64 %rs1.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <2 x i32>
+  ret <2 x i32> %res
+}
+
+define <2 x i32> @test_pslidedownx_v2i32(<2 x i32> %rd, <2 x i32> %rs1,
+                                         i32 %rs2) {
+; RV32-LABEL: test_pslidedownx_v2i32:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a4, a4, 31
+; RV32-NEXT:    srli a4, a4, 26
+; RV32-NEXT:    bnez a4, .LBB518_2
+; RV32-NEXT:  # %bb.1:
+; RV32-NEXT:    mv a2, a1
+; RV32-NEXT:    mv a1, a0
+; RV32-NEXT:  .LBB518_2:
+; RV32-NEXT:    mv a0, a1
+; RV32-NEXT:    mv a1, a2
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: test_pslidedownx_v2i32:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a2, a2, 5
+; RV64-NEXT:    srx a0, a1, a2
+; RV64-NEXT:    ret
+  %rd.bits = bitcast <2 x i32> %rd to i64
+  %rs1.bits = bitcast <2 x i32> %rs1 to i64
+  %rs2.ext = zext i32 %rs2 to i64
+  %shamt = shl i64 %rs2.ext, 5
+  %res.bits = call i64 @llvm.fshr.i64(i64 %rs1.bits, i64 %rd.bits, i64 %shamt)
+  %res = bitcast i64 %res.bits to <2 x i32>
+  ret <2 x i32> %res
+}



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