diff --git a/core/simd/x86/sse.odin b/core/simd/x86/sse.odin
index e697d5f5e..eb1950ea3 100644
--- a/core/simd/x86/sse.odin
+++ b/core/simd/x86/sse.odin
@@ -417,6 +417,18 @@ _mm_stream_ps :: #force_inline proc "c" (addr: [^]f32, a: __m128) {
 	intrinsics.non_temporal_store((^__m128)(addr), a)
 }
 
+when ODIN_ARCH == .amd64 {
+	_mm_cvtss_si64 :: #force_inline proc "c"(a: __m128) -> i64 {
+		return cvtss2si64(a)
+	}
+	_mm_cvttss_si64 :: #force_inline proc "c"(a: __m128) -> i64 {
+		return cvttss2si64(a)
+	}
+	_mm_cvtsi64_ss :: #force_inline proc "c"(a: __m128, b: i64) -> __m128 {
+		return cvtsi642ss(a, b)
+	}
+}
+
 
 @(default_calling_convention="c")
 @(private)
@@ -493,4 +505,13 @@ foreign _ {
 	prefetch    :: proc(p: rawptr, #const rw, loc, ty: u32) ---
 	@(link_name="llvm.x86.sse.cmp.ss")
 	cmpss       :: proc(a, b: __m128, #const imm8: u8) -> __m128 ---
+
+
+	// amd64 only
+	@(link_name="llvm.x86.sse.cvtss2si64")
+	cvtss2si64  :: proc(a: __m128) -> i64 ---
+	@(link_name="llvm.x86.sse.cvttss2si64")
+	cvttss2si64 :: proc(a: __m128) -> i64 ---
+	@(link_name="llvm.x86.sse.cvtsi642ss")
+	cvtsi642ss  :: proc(a: __m128, b: i64) -> __m128 ---
 }
diff --git a/core/simd/x86/sse2.odin b/core/simd/x86/sse2.odin
index a47d2a09d..8be1815fa 100644
--- a/core/simd/x86/sse2.odin
+++ b/core/simd/x86/sse2.odin
@@ -780,6 +780,43 @@ _mm_unpacklo_pd :: #force_inline proc "c" (a, b: __m128d) -> __m128d {
 }
 
 
+when ODIN_ARCH == .amd64 {
+	_mm_cvtsd_si64 :: #force_inline proc "c" (a: __m128d) -> i64 {
+		return cvtsd2si64(a)
+	}
+	_mm_cvtsd_si64x :: #force_inline proc "c" (a: __m128d) -> i64 {
+		return _mm_cvtsd_si64(a)
+	}
+	_mm_cvttsd_si64 :: #force_inline proc "c" (a: __m128d) -> i64 {
+		return cvttsd2si64(a)
+	}
+	_mm_cvttsd_si64x :: #force_inline proc "c" (a: __m128d) -> i64 {
+		return _mm_cvttsd_si64(a)
+	}
+	_mm_stream_si64 :: #force_inline proc "c" (mem_addr: ^i64, a: i64) {
+		intrinsics.non_temporal_store(mem_addr, a)
+	}
+	_mm_cvtsi64_si128 :: #force_inline proc "c" (a: i64) -> __m128i {
+		return _mm_set_epi64x(0, a)
+	}
+	_mm_cvtsi64x_si128 :: #force_inline proc "c" (a: i64) -> __m128i {
+		return _mm_cvtsi64_si128(a)
+	}
+	_mm_cvtsi128_si64 :: #force_inline proc "c" (a: __m128i) -> i64 {
+		return simd.extract(transmute(i64x2)a, 0)
+	}
+	_mm_cvtsi128_si64x :: #force_inline proc "c" (a: __m128i) -> i64 {
+		return _mm_cvtsi128_si64(a)
+	}
+	_mm_cvtsi64_sd :: #force_inline proc "c" (a: __m128d, b: i64) -> __m128d {
+		return simd.replace(a, 0, f64(b))
+	}
+	_mm_cvtsi64x_sd :: #force_inline proc "c" (a: __m128d, b: i64) -> __m128d {
+		return _mm_cvtsi64_sd(a, b)
+	}
+}
+
+
 @(default_calling_convention="c")
 @(private)
 foreign _ {
@@ -923,4 +960,10 @@ foreign _ {
 	storeudq   :: proc(mem_addr: rawptr, a: __m128i) ---
 	@(link_name="llvm.x86.sse2.storeu.pd")
 	storeupd   :: proc(mem_addr: rawptr, a: __m128d) ---
+
+	// amd64 only
+	@(link_name="llvm.x86.sse2.cvtsd2si64")
+	cvtsd2si64  :: proc(a: __m128d) -> i64 ---
+	@(link_name="llvm.x86.sse2.cvttsd2si64")
+	cvttsd2si64 :: proc(a: __m128d) -> i64 ---
 }