sse4.1 instructions (rust-lang#98)

* sse4.1: _mm_blendv_ps and _mm_blendv_pd

* sse4.1: _mm_blend_ps and _mm_blend_pd

- HACK warning: messing with the constify macros
- Selecting only one buffer gets optimized away and tests need to take this into account

* sse4.1: _mm_blend_epi16

* sse4.1: _mm_extract_ps

* sse4.1: _mm_extract_epi8

* see4.1: _mm_extract_epi32

* sse4.1: _mm_extract_epi64

* sse4.1: _mm_insert_ps

* sse4.1: _mm_insert_epi8

* sse4.1: _mm_insert_epi32 and _mm_insert_epi64

* Formmating

* sse4.1: _mm_max_epi8, _mm_max_epu16, _mm_max_epi32 and _mm_max_epu32

* Fix wrong compiler flag

- avx -> sse4.1

* Fix intrinsics that only work with x86-64

* sse4.1: use appropriate types

* Revert '_mm_extract_ps' to return i32

* sse4.1: Use the v128 types for consistency

* Try fix for windows

* Try "vectorcall" calling convention

* Revert "Try "vectorcall" calling convention"

This reverts commit 12936e9976bc6b0e4e538d82f55f0ee2d87a7f25.

* Revert "Try fix for windows"

This reverts commit 9c473808d334acedd46060b32ceea116662bf6a3.

* Change tests for windows

* Remove useless Windows test

Author: p32blo

src/x86/macros.rs

@@ -301,3 +301,41 @@ macro_rules! constify_imm6 {
         }
     }
 }
+
+macro_rules! constify_imm4 {
+    ($imm8:expr, $expand:ident) => {
+        #[allow(overflowing_literals)]
+        match $imm8 & 0b1111 {
+            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),
+            _ => $expand!(15),
+        }
+    }
+}
+
+macro_rules! constify_imm2 {
+    ($imm8:expr, $expand:ident) => {
+        #[allow(overflowing_literals)]
+        match $imm8 & 0b11 {
+            0 => $expand!(0),
+            1 => $expand!(1),
+            2 => $expand!(2),
+            _ => $expand!(3),
+        }
+    }
+}
+
+