lib: put SSE intrinsics behind an ifdef

lib/graphics.c

@@ -14,8 +14,10 @@
 
 #include <sys/ioctl.h>
 
+#ifndef NO_SSE
 #include <xmmintrin.h>
 #include <emmintrin.h>
+#endif
 
 #include <kernel/video.h>
 
@@ -517,6 +519,7 @@ _cleanup_sprite:
 	free(bufferb);
 }
 
+#ifndef NO_SSE
 static __m128i mask00ff;
 static __m128i mask0080;
 static __m128i mask0101;
@@ -526,6 +529,7 @@ __attribute__((constructor)) static void _masks(void) {
 	mask0080 = _mm_set1_epi16(0x0080);
 	mask0101 = _mm_set1_epi16(0x0101);
 }
+#endif
 
 __attribute__((__force_align_arg_pointer__))
 void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y) {
@@ -547,7 +551,7 @@ void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y) {
 		/* Alpha embedded is the most important step. */
 		for (uint16_t _y = 0; _y < sprite->height; ++_y) {
 			if (!_is_in_clip(ctx, y + _y)) continue;
-#if 0
+#ifdef NO_SSE
 			for (uint16_t _x = 0; _x < sprite->width; ++_x) {
 				if (x + _x < _left || x + _x > _right || y + _y < _top || y + _y > _bottom)
 					continue;

lib/jpeg.c

@@ -38,8 +38,10 @@
 
 #include <toaru/graphics.h>
 
+#ifndef NO_SSE
 #include <xmmintrin.h>
 #include <emmintrin.h>
+#endif
 
 #if 0
 #include <toaru/trace.h>
@@ -226,6 +228,13 @@ static float cosines[8][8] = {
 static float premul[8][8][8][8]= {{{{0}}}};
 
 static void add_idc(struct idct * self, int n, int m, int coeff) {
+#ifdef NO_SSE
+	for (int y = 0; y < 8; ++y) {
+		for (int x = 0; x < 8; ++x) {
+			self->base[xy_to_lin(x, y)] += premul[n][m][y][x] * coeff;
+		}
+	}
+#else
 	__m128 c = _mm_set_ps(coeff,coeff,coeff,coeff);
 	for (int y = 0; y < 8; ++y) {
 		__m128 a, b;
@@ -245,6 +254,7 @@ static void add_idc(struct idct * self, int n, int m, int coeff) {
 		a = _mm_add_ps(a,b);
 		_mm_store_ps(&self->base[xy_to_lin(4,y)], a);
 	}
+#endif
 }
 
 static void add_zigzag(struct idct * self, int zi, int coeff) {