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simd-128: The input lanes of integer-to-integer narrowing ops should be interpreted as signed (#2850)

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https://github.com/WebAssembly/spec/blob/main/proposals/simd/SIMD.md#integer-to-integer-narrowing
This commit is contained in:
liutao
2024-01-03 09:51:58 +08:00
committed by GitHub
parent c43e4505da
commit 75a2b98eb4
1 changed files with 8 additions and 4 deletions
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12
core/iwasm/compilation/simd/simd_conversions.c
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@ -158,11 +158,15 @@ simd_integer_narrow_common(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
return false; return false;
} }
/* sat */ /* Refer to:
* https://github.com/WebAssembly/spec/blob/main/proposals/simd/SIMD.md#integer-to-integer-narrowing
* Regardless of the whether the operation is signed or unsigned, the input
* lanes are interpreted as signed integers.
*/
if (!(vec1 = simd_saturate(comp_ctx, func_ctx, e_sat_i16x8, vec1, min, max, if (!(vec1 = simd_saturate(comp_ctx, func_ctx, e_sat_i16x8, vec1, min, max,
is_signed)) true))
|| !(vec2 = simd_saturate(comp_ctx, func_ctx, e_sat_i16x8, vec2, min, || !(vec2 = simd_saturate(comp_ctx, func_ctx, e_sat_i16x8, vec2, min,
max, is_signed))) { max, true))) {
return false; return false;
} }
@ -740,4 +744,4 @@ aot_compile_simd_i64x2_extmul_i32x4(AOTCompContext *comp_ctx,
{ {
return simd_integer_extmul(comp_ctx, func_ctx, lower_half, is_signed, return simd_integer_extmul(comp_ctx, func_ctx, lower_half, is_signed,
e_i64x2_extmul_i32x4); e_i64x2_extmul_i32x4);
} }