[clang] [llvm] [RISCV] Implement Clang Builtins for XCValu Extension in CV32E40P (PR #100684)

[Craig Topper via llvm-commits]

================
@@ -91,6 +91,116 @@ define i32 @exthz(i16 %a) {
   ret i32 %1
 }
 
+declare i32 @llvm.riscv.cv.alu.slet(i32, i32)
+
+define i32 @test.cv.alu.slet(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.slet:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.slet a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.slet(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.sletu(i32, i32)
+
+define i32 @test.cv.alu.sletu(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.sletu:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.sletu a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.sletu(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.min(i32, i32)
+
+define i32 @test.cv.alu.min(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.min:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.min a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.min(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.minu(i32, i32)
+
+define i32 @test.cv.alu.minu(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.minu:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.minu a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.minu(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.max(i32, i32)
+
+define i32 @test.cv.alu.max(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.max:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.max a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.max(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.maxu(i32, i32)
+
+define i32 @test.cv.alu.maxu(i32 %a, i32 %b) {
+; CHECK-LABEL: test.cv.alu.maxu:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.maxu a0, a0, a1
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.maxu(i32 %a, i32 %b)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.exths(i32)
+
+define i32 @test.cv.alu.exths(i32 %a) {
+; CHECK-LABEL: test.cv.alu.exths:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.exths a0, a0
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.exths(i32 %a)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.exthz(i32)
+
+define i32 @test.cv.alu.exthz(i32 %a) {
+; CHECK-LABEL: test.cv.alu.exthz:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.exthz a0, a0
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.exthz(i32 %a)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.extbs(i32)
+
+define i32 @test.cv.alu.extbs(i32 %a) {
+; CHECK-LABEL: test.cv.alu.extbs:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.extbs a0, a0
+; CHECK-NEXT:    ret
+  %1 = call i32 @llvm.riscv.cv.alu.extbs(i32 %a)
+  ret i32 %1
+}
+
+declare i32 @llvm.riscv.cv.alu.extbz(i32)
+
+define i32 @test.cv.alu.extbz(i32 %a) {
+; CHECK-LABEL: test.cv.alu.extbz:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cv.extbz a0, a0
----------------
topperc wrote:

What is the advantage of extbz over andi with 255?

https://github.com/llvm/llvm-project/pull/100684