pulley: Implement iadd_pairwise (bytecodealliance#9912)

* pulley: Implement iadd_pairwise

* access by index

Co-authored-by: Xuanwo <[email protected]>

---------

Co-authored-by: Xuanwo <[email protected]>

Author: eagr

cranelift/codegen/src/isa/pulley_shared/lower.isle

@@ -215,7 +215,6 @@
   (if-let neg_u32 (u32_try_from_u64 neg_u64))
   neg_u32)
 
-
 (rule 1 (lower (has_type $I8X16 (iadd a b))) (pulley_vaddi8x16 a b))
 (rule 1 (lower (has_type $I16X8 (iadd a b))) (pulley_vaddi16x8 a b))
 (rule 1 (lower (has_type $I32X4 (iadd a b))) (pulley_vaddi32x4 a b))
@@ -226,6 +225,11 @@
 (rule 1 (lower (has_type $I16X8 (sadd_sat a b))) (pulley_vaddi16x8_sat a b))
 (rule 1 (lower (has_type $I16X8 (uadd_sat a b))) (pulley_vaddu16x8_sat a b))
 
+;;;; Rules for `iadd_pairwise` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(rule (lower (has_type $I16X8 (iadd_pairwise a b))) (pulley_vaddpairwisei16x8_s a b))
+(rule (lower (has_type $I32X4 (iadd_pairwise a b))) (pulley_vaddpairwisei32x4_s a b))
+
 ;;;; Rules for `isub` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 (rule 0 (lower (has_type (ty_int (fits_in_32 _)) (isub a b))) (pulley_xsub32 a b))

crates/wast-util/src/lib.rs

@@ -405,20 +405,15 @@ impl WastTest {
                 "misc_testsuite/simd/issue_3327_bnot_lowering.wast",
                 "misc_testsuite/simd/v128-select.wast",
                 "spec_testsuite/proposals/relaxed-simd/i32x4_relaxed_trunc.wast",
-                "spec_testsuite/proposals/relaxed-simd/relaxed_dot_product.wast",
                 "spec_testsuite/proposals/relaxed-simd/relaxed_madd_nmadd.wast",
                 "spec_testsuite/proposals/memory64/relaxed_madd_nmadd.wast",
-                "spec_testsuite/proposals/memory64/relaxed_dot_product.wast",
                 "spec_testsuite/proposals/memory64/i32x4_relaxed_trunc.wast",
                 "spec_testsuite/simd_f32x4_arith.wast",
                 "spec_testsuite/simd_f32x4_cmp.wast",
                 "spec_testsuite/simd_f32x4_pmin_pmax.wast",
                 "spec_testsuite/simd_f64x2_arith.wast",
                 "spec_testsuite/simd_f64x2_cmp.wast",
                 "spec_testsuite/simd_f64x2_pmin_pmax.wast",
-                "spec_testsuite/simd_i16x8_extadd_pairwise_i8x16.wast",
-                "spec_testsuite/simd_i32x4_dot_i16x8.wast",
-                "spec_testsuite/simd_i32x4_extadd_pairwise_i16x8.wast",
                 "spec_testsuite/simd_i32x4_trunc_sat_f32x4.wast",
                 "spec_testsuite/simd_i32x4_trunc_sat_f64x2.wast",
                 "spec_testsuite/simd_load.wast",

pulley/src/interp.rs

@@ -3339,6 +3339,31 @@ impl ExtendedOpVisitor for Interpreter<'_> {
         ControlFlow::Continue(())
     }
 
+    fn vaddpairwisei16x8_s(&mut self, operands: BinaryOperands<VReg>) -> ControlFlow<Done> {
+        let a = self.state[operands.src1].get_i16x8();
+        let b = self.state[operands.src2].get_i16x8();
+        let mut result = [0i16; 8];
+        let half = result.len() / 2;
+        for i in 0..half {
+            result[i] = a[2 * i].wrapping_add(a[2 * i + 1]);
+            result[i + half] = b[2 * i].wrapping_add(b[2 * i + 1]);
+        }
+        self.state[operands.dst].set_i16x8(result);
+        ControlFlow::Continue(())
+    }
+
+    fn vaddpairwisei32x4_s(&mut self, operands: BinaryOperands<VReg>) -> ControlFlow<Done> {
+        let a = self.state[operands.src1].get_i32x4();
+        let b = self.state[operands.src2].get_i32x4();
+        let mut result = [0i32; 4];
+        result[0] = a[0].wrapping_add(a[1]);
+        result[1] = a[2].wrapping_add(a[3]);
+        result[2] = b[0].wrapping_add(b[1]);
+        result[3] = b[2].wrapping_add(b[3]);
+        self.state[operands.dst].set_i32x4(result);
+        ControlFlow::Continue(())
+    }
+
     fn vshli8x16(&mut self, operands: BinaryOperands<VReg, VReg, XReg>) -> ControlFlow<Done> {
         let a = self.state[operands.src1].get_i8x16();
         let b = self.state[operands.src2].get_u32();

pulley/src/lib.rs

@@ -908,6 +908,11 @@ macro_rules! for_each_extended_op {
             /// `dst = satruating_add(src1, src2)`
             vaddu16x8_sat = VAddU16x8Sat { operands: BinaryOperands<VReg> };
 
+            /// `dst = [src1[0] + src1[1], ..., src2[6] + src2[7]]`
+            vaddpairwisei16x8_s = VAddpairwiseI16x8S { operands: BinaryOperands<VReg> };
+            /// `dst = [src1[0] + src1[1], ..., src2[2] + src2[3]]`
+            vaddpairwisei32x4_s = VAddpairwiseI32x4S { operands: BinaryOperands<VReg> };
+
             /// `dst = src1 << src2`
             vshli8x16 = VShlI8x16 { operands: BinaryOperands<VReg, VReg, XReg> };
             /// `dst = src1 << src2`