diff --git a/library/stdarch/src/x86/sse42.rs b/library/stdarch/src/x86/sse42.rs
index be1d97edf9e6..b3ef2a8b21b3 100644
--- a/library/stdarch/src/x86/sse42.rs
+++ b/library/stdarch/src/x86/sse42.rs
@@ -18,6 +18,270 @@ pub const _SIDD_MASKED_NEGATIVE_POLARITY: i8 = 0b00110000;
 pub const _SIDD_LEAST_SIGNIFICANT: i8 = 0b00000000;
 pub const _SIDD_MOST_SIGNIFICANT: i8 = 0b01000000;
 
+macro_rules! constify_imm8 {
+    ($imm8:expr, $expand:ident) => {
+        #[allow(overflowing_literals)]
+        match $imm8 & 0b1111_1111 {
+            0 => $expand!(0),
+            1 => $expand!(1),
+            2 => $expand!(2),
+            3 => $expand!(3),
+            4 => $expand!(4),
+            5 => $expand!(5),
+            6 => $expand!(6),
+            7 => $expand!(7),
+            8 => $expand!(8),
+            9 => $expand!(9),
+            10 => $expand!(10),
+            11 => $expand!(11),
+            12 => $expand!(12),
+            13 => $expand!(13),
+            14 => $expand!(14),
+            15 => $expand!(15),
+            16 => $expand!(16),
+            17 => $expand!(17),
+            18 => $expand!(18),
+            19 => $expand!(19),
+            20 => $expand!(20),
+            21 => $expand!(21),
+            22 => $expand!(22),
+            23 => $expand!(23),
+            24 => $expand!(24),
+            25 => $expand!(25),
+            26 => $expand!(26),
+            27 => $expand!(27),
+            28 => $expand!(28),
+            29 => $expand!(29),
+            30 => $expand!(30),
+            31 => $expand!(31),
+            32 => $expand!(32),
+            33 => $expand!(33),
+            34 => $expand!(34),
+            35 => $expand!(35),
+            36 => $expand!(36),
+            37 => $expand!(37),
+            38 => $expand!(38),
+            39 => $expand!(39),
+            40 => $expand!(40),
+            41 => $expand!(41),
+            42 => $expand!(42),
+            43 => $expand!(43),
+            44 => $expand!(44),
+            45 => $expand!(45),
+            46 => $expand!(46),
+            47 => $expand!(47),
+            48 => $expand!(48),
+            49 => $expand!(49),
+            50 => $expand!(50),
+            51 => $expand!(51),
+            52 => $expand!(52),
+            53 => $expand!(53),
+            54 => $expand!(54),
+            55 => $expand!(55),
+            56 => $expand!(56),
+            57 => $expand!(57),
+            58 => $expand!(58),
+            59 => $expand!(59),
+            60 => $expand!(60),
+            61 => $expand!(61),
+            62 => $expand!(62),
+            63 => $expand!(63),
+            64 => $expand!(64),
+            65 => $expand!(65),
+            66 => $expand!(66),
+            67 => $expand!(67),
+            68 => $expand!(68),
+            69 => $expand!(69),
+            70 => $expand!(70),
+            71 => $expand!(71),
+            72 => $expand!(72),
+            73 => $expand!(73),
+            74 => $expand!(74),
+            75 => $expand!(75),
+            76 => $expand!(76),
+            77 => $expand!(77),
+            78 => $expand!(78),
+            79 => $expand!(79),
+            80 => $expand!(80),
+            81 => $expand!(81),
+            82 => $expand!(82),
+            83 => $expand!(83),
+            84 => $expand!(84),
+            85 => $expand!(85),
+            86 => $expand!(86),
+            87 => $expand!(87),
+            88 => $expand!(88),
+            89 => $expand!(89),
+            90 => $expand!(90),
+            91 => $expand!(91),
+            92 => $expand!(92),
+            93 => $expand!(93),
+            94 => $expand!(94),
+            95 => $expand!(95),
+            96 => $expand!(96),
+            97 => $expand!(97),
+            98 => $expand!(98),
+            99 => $expand!(99),
+            100 => $expand!(100),
+            101 => $expand!(101),
+            102 => $expand!(102),
+            103 => $expand!(103),
+            104 => $expand!(104),
+            105 => $expand!(105),
+            106 => $expand!(106),
+            107 => $expand!(107),
+            108 => $expand!(108),
+            109 => $expand!(109),
+            110 => $expand!(110),
+            111 => $expand!(111),
+            112 => $expand!(112),
+            113 => $expand!(113),
+            114 => $expand!(114),
+            115 => $expand!(115),
+            116 => $expand!(116),
+            117 => $expand!(117),
+            118 => $expand!(118),
+            119 => $expand!(119),
+            120 => $expand!(120),
+            121 => $expand!(121),
+            122 => $expand!(122),
+            123 => $expand!(123),
+            124 => $expand!(124),
+            125 => $expand!(125),
+            126 => $expand!(126),
+            127 => $expand!(127),
+            128 => $expand!(128),
+            129 => $expand!(129),
+            130 => $expand!(130),
+            131 => $expand!(131),
+            132 => $expand!(132),
+            133 => $expand!(133),
+            134 => $expand!(134),
+            135 => $expand!(135),
+            136 => $expand!(136),
+            137 => $expand!(137),
+            138 => $expand!(138),
+            139 => $expand!(139),
+            140 => $expand!(140),
+            141 => $expand!(141),
+            142 => $expand!(142),
+            143 => $expand!(143),
+            144 => $expand!(144),
+            145 => $expand!(145),
+            146 => $expand!(146),
+            147 => $expand!(147),
+            148 => $expand!(148),
+            149 => $expand!(149),
+            150 => $expand!(150),
+            151 => $expand!(151),
+            152 => $expand!(152),
+            153 => $expand!(153),
+            154 => $expand!(154),
+            155 => $expand!(155),
+            156 => $expand!(156),
+            157 => $expand!(157),
+            158 => $expand!(158),
+            159 => $expand!(159),
+            160 => $expand!(160),
+            161 => $expand!(161),
+            162 => $expand!(162),
+            163 => $expand!(163),
+            164 => $expand!(164),
+            165 => $expand!(165),
+            166 => $expand!(166),
+            167 => $expand!(167),
+            168 => $expand!(168),
+            169 => $expand!(169),
+            170 => $expand!(170),
+            171 => $expand!(171),
+            172 => $expand!(172),
+            173 => $expand!(173),
+            174 => $expand!(174),
+            175 => $expand!(175),
+            176 => $expand!(176),
+            177 => $expand!(177),
+            178 => $expand!(178),
+            179 => $expand!(179),
+            180 => $expand!(180),
+            181 => $expand!(181),
+            182 => $expand!(182),
+            183 => $expand!(183),
+            184 => $expand!(184),
+            185 => $expand!(185),
+            186 => $expand!(186),
+            187 => $expand!(187),
+            188 => $expand!(188),
+            189 => $expand!(189),
+            190 => $expand!(190),
+            191 => $expand!(191),
+            192 => $expand!(192),
+            193 => $expand!(193),
+            194 => $expand!(194),
+            195 => $expand!(195),
+            196 => $expand!(196),
+            197 => $expand!(197),
+            198 => $expand!(198),
+            199 => $expand!(199),
+            200 => $expand!(200),
+            201 => $expand!(201),
+            202 => $expand!(202),
+            203 => $expand!(203),
+            204 => $expand!(204),
+            205 => $expand!(205),
+            206 => $expand!(206),
+            207 => $expand!(207),
+            208 => $expand!(208),
+            209 => $expand!(209),
+            210 => $expand!(210),
+            211 => $expand!(211),
+            212 => $expand!(212),
+            213 => $expand!(213),
+            214 => $expand!(214),
+            215 => $expand!(215),
+            216 => $expand!(216),
+            217 => $expand!(217),
+            218 => $expand!(218),
+            219 => $expand!(219),
+            220 => $expand!(220),
+            221 => $expand!(221),
+            222 => $expand!(222),
+            223 => $expand!(223),
+            224 => $expand!(224),
+            225 => $expand!(225),
+            226 => $expand!(226),
+            227 => $expand!(227),
+            228 => $expand!(228),
+            229 => $expand!(229),
+            230 => $expand!(230),
+            231 => $expand!(231),
+            232 => $expand!(232),
+            233 => $expand!(233),
+            234 => $expand!(234),
+            235 => $expand!(235),
+            236 => $expand!(236),
+            237 => $expand!(237),
+            238 => $expand!(238),
+            239 => $expand!(239),
+            240 => $expand!(240),
+            241 => $expand!(241),
+            242 => $expand!(242),
+            243 => $expand!(243),
+            244 => $expand!(244),
+            245 => $expand!(245),
+            246 => $expand!(246),
+            247 => $expand!(247),
+            248 => $expand!(248),
+            249 => $expand!(249),
+            250 => $expand!(250),
+            251 => $expand!(251),
+            252 => $expand!(252),
+            253 => $expand!(253),
+            254 => $expand!(254),
+            _ => $expand!(255),
+        }
+    }
+}
+
 #[inline(always)]
 #[target_feature = "+sse4.2"]
 pub fn _mm_cmpestri(
@@ -27,7 +291,12 @@ pub fn _mm_cmpestri(
     lb: i32,
     imm8: i8,
 ) -> i32 {
-    unsafe { pcmpestri128(a, la, b, lb, imm8) }
+    macro_rules! call {
+        ($imm8:expr) => {
+            unsafe { pcmpestri128(a, la, b, lb, $imm8) }
+        }
+    }
+    constify_imm8!(imm8, call)
 }
 
 #[allow(improper_ctypes)]