diff --git a/Makefile b/Makefile
index 8f1cba73d9..2b098b6726 100644
--- a/Makefile
+++ b/Makefile
@@ -421,15 +421,9 @@ endif
 ifeq ($(COMPILER),ido)
 $(BUILD_DIR)/src/boot/driverominit.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/boot/logutils.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/boot/sleep.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/boot/sprintf.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/boot/stackcheck.o: OPTFLAGS := -O2
 
-$(BUILD_DIR)/src/code/__osMalloc_n64.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/code/__osMalloc_gc.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/code_800FC620.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/code/fp_math.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/code/rand.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/gfxprint.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/jpegutils.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/jpegdecoder.o: OPTFLAGS := -O2
@@ -439,9 +433,7 @@ $(BUILD_DIR)/src/code/loadfragment2_gc.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/mtxuty-cvt.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/padsetup.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/padutils.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/code/printutils.o: OPTFLAGS := -O2
 $(BUILD_DIR)/src/code/relocation_gc.o: OPTFLAGS := -O2
-$(BUILD_DIR)/src/code/system_malloc.o: OPTFLAGS := -O2
 
 $(BUILD_DIR)/src/code/fault_n64.o: CFLAGS += -trapuv
 $(BUILD_DIR)/src/code/fault_gc.o: CFLAGS += -trapuv
@@ -464,6 +456,8 @@ else
 $(BUILD_DIR)/src/libc/%.o: OPTFLAGS := -O2
 endif
 
+$(BUILD_DIR)/src/libc64/%.o: OPTFLAGS := -O2
+
 $(BUILD_DIR)/src/audio/%.o: OPTFLAGS := -O2
 
 # Use signed chars instead of unsigned for this audio file (needed to match AudioDebug_ScrPrt)
diff --git a/include/functions.h b/include/functions.h
index 4bcd52766b..6e2dbe87e6 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -450,8 +450,6 @@ void func_80033C30(Vec3f* arg0, Vec3f* arg1, u8 alpha, PlayState* play);
 void Actor_RequestQuake(PlayState* play, s16 y, s16 duration);
 void Actor_RequestQuakeWithSpeed(PlayState* play, s16 y, s16 duration, s16 speed);
 void Actor_RequestQuakeAndRumble(Actor* actor, PlayState* play, s16 quakeY, s16 quakeDuration);
-f32 Rand_ZeroFloat(f32 f);
-f32 Rand_CenteredFloat(f32 f);
 void Actor_DrawDoorLock(PlayState* play, s32 frame, s32 type);
 void func_8003424C(PlayState* play, Vec3f* arg1);
 void Actor_SetColorFilter(Actor* actor, s16 colorFlag, s16 colorIntensityMax, s16 bufFlag, s16 duration);
diff --git a/include/libc64/qrand.h b/include/libc64/qrand.h
new file mode 100644
index 0000000000..cc66d4f43b
--- /dev/null
+++ b/include/libc64/qrand.h
@@ -0,0 +1,18 @@
+#ifndef LIBC64_QRAND_H
+#define LIBC64_QRAND_H
+
+#include "ultra64.h"
+
+u32 Rand_Next(void);
+void Rand_Seed(u32 seed);
+f32 Rand_ZeroOne(void);
+void Rand_Seed_Variable(u32* rndNum, u32 seed);
+u32 Rand_Next_Variable(u32* rndNum);
+f32 Rand_ZeroOne_Variable(u32* rndNum);
+
+#if !PLATFORM_N64
+f32 Rand_Centered(void);
+f32 Rand_Centered_Variable(u32* rndNum);
+#endif
+
+#endif
diff --git a/include/rand.h b/include/rand.h
index 0f4f4d9cd3..d6844f4b74 100644
--- a/include/rand.h
+++ b/include/rand.h
@@ -1,18 +1,9 @@
 #ifndef RAND_H
 #define RAND_H
 
-#include "ultra64.h"
+#include "libc64/qrand.h"
 
-u32 Rand_Next(void);
-void Rand_Seed(u32 seed);
-f32 Rand_ZeroOne(void);
-void Rand_Seed_Variable(u32* rndNum, u32 seed);
-u32 Rand_Next_Variable(u32* rndNum);
-f32 Rand_ZeroOne_Variable(u32* rndNum);
-
-#if !PLATFORM_N64
-f32 Rand_Centered(void);
-f32 Rand_Centered_Variable(u32* rndNum);
-#endif
+f32 Rand_ZeroFloat(f32 f);
+f32 Rand_CenteredFloat(f32 f);
 
 #endif
diff --git a/include/z64.h b/include/z64.h
index 9fbb9b6a94..a4871aa830 100644
--- a/include/z64.h
+++ b/include/z64.h
@@ -63,6 +63,7 @@
 #include "jpeg.h"
 #include "prerender.h"
 #include "rand.h"
+#include "libc64/qrand.h"
 #include "sys_math.h"
 #include "sys_math3d.h"
 #include "fp_math.h"
diff --git a/spec b/spec
index 13a77dec9a..ecb96a20d9 100644
--- a/spec
+++ b/spec
@@ -33,10 +33,10 @@ beginseg
     include "$(BUILD_DIR)/src/boot/stackcheck.o"
     include "$(BUILD_DIR)/src/boot/logutils.o"
 #if PLATFORM_N64
-    include "$(BUILD_DIR)/src/boot/sleep.o"
+    include "$(BUILD_DIR)/src/libc64/sleep.o"
 #endif
 #if OOT_DEBUG
-    include "$(BUILD_DIR)/src/boot/sprintf.o"
+    include "$(BUILD_DIR)/src/libc64/sprintf.o"
 #endif
     include "$(BUILD_DIR)/src/libultra/io/piacs.o"
     include "$(BUILD_DIR)/src/libultra/os/sendmesg.o"
@@ -614,21 +614,21 @@ beginseg
     include "$(BUILD_DIR)/src/code/padutils.o"
     include "$(BUILD_DIR)/src/code/padsetup.o"
 #endif
-    include "$(BUILD_DIR)/src/code/fp_math.o"
-    include "$(BUILD_DIR)/src/code/fp.o"
-    include "$(BUILD_DIR)/src/code/system_malloc.o"
-    include "$(BUILD_DIR)/src/code/rand.o"
+    include "$(BUILD_DIR)/src/libc64/math64.o"
+    include "$(BUILD_DIR)/src/libc64/fp.o"
+    include "$(BUILD_DIR)/src/libc64/malloc.o"
+    include "$(BUILD_DIR)/src/libc64/qrand.o"
 #if PLATFORM_N64
-    include "$(BUILD_DIR)/src/code/__osMalloc_n64.o"
+    include "$(BUILD_DIR)/src/libc64/__osMalloc_n64.o"
 #else
-    include "$(BUILD_DIR)/src/code/__osMalloc_gc.o"
+    include "$(BUILD_DIR)/src/libc64/__osMalloc_gc.o"
 #endif
 #if !OOT_DEBUG
-    include "$(BUILD_DIR)/src/boot/sprintf.o"
+    include "$(BUILD_DIR)/src/libc64/sprintf.o"
 #endif
-    include "$(BUILD_DIR)/src/code/printutils.o"
+    include "$(BUILD_DIR)/src/libc64/aprintf.o"
 #if !PLATFORM_N64
-    include "$(BUILD_DIR)/src/boot/sleep.o"
+    include "$(BUILD_DIR)/src/libc64/sleep.o"
 #endif
     include "$(BUILD_DIR)/src/code/jpegutils.o"
     include "$(BUILD_DIR)/src/code/jpegdecoder.o"
diff --git a/src/code/z_actor.c b/src/code/z_actor.c
index e45d96552e..8e1e39f78d 100644
--- a/src/code/z_actor.c
+++ b/src/code/z_actor.c
@@ -1,6 +1,7 @@
 #include "global.h"
 #include "fault.h"
 #include "quake.h"
+#include "rand.h"
 #include "terminal.h"
 
 #include "overlays/actors/ovl_Arms_Hook/z_arms_hook.h"
diff --git a/src/code/__osMalloc_gc.c b/src/libc64/__osMalloc_gc.c
similarity index 100%
rename from src/code/__osMalloc_gc.c
rename to src/libc64/__osMalloc_gc.c
diff --git a/src/code/__osMalloc_n64.c b/src/libc64/__osMalloc_n64.c
similarity index 100%
rename from src/code/__osMalloc_n64.c
rename to src/libc64/__osMalloc_n64.c
diff --git a/src/code/printutils.c b/src/libc64/aprintf.c
similarity index 100%
rename from src/code/printutils.c
rename to src/libc64/aprintf.c
diff --git a/src/code/fp.s b/src/libc64/fp.s
similarity index 100%
rename from src/code/fp.s
rename to src/libc64/fp.s
diff --git a/src/code/system_malloc.c b/src/libc64/malloc.c
similarity index 100%
rename from src/code/system_malloc.c
rename to src/libc64/malloc.c
diff --git a/src/code/fp_math.c b/src/libc64/math64.c
similarity index 100%
rename from src/code/fp_math.c
rename to src/libc64/math64.c
diff --git a/src/code/rand.c b/src/libc64/qrand.c
similarity index 99%
rename from src/code/rand.c
rename to src/libc64/qrand.c
index d6199b1890..69bfa11d72 100644
--- a/src/code/rand.c
+++ b/src/libc64/qrand.c
@@ -41,7 +41,7 @@
  *
  * @note Original name: qrand.c
  */
-#include "rand.h"
+#include "libc64/qrand.h"
 #include "z64math.h"
 
 #define RAND_MULTIPLIER 1664525
diff --git a/src/boot/sleep.c b/src/libc64/sleep.c
similarity index 100%
rename from src/boot/sleep.c
rename to src/libc64/sleep.c
diff --git a/src/boot/sprintf.c b/src/libc64/sprintf.c
similarity index 100%
rename from src/boot/sprintf.c
rename to src/libc64/sprintf.c
diff --git a/src/overlays/actors/ovl_Fishing/z_fishing.c b/src/overlays/actors/ovl_Fishing/z_fishing.c
index b60c3ee476..f862b6aec2 100644
--- a/src/overlays/actors/ovl_Fishing/z_fishing.c
+++ b/src/overlays/actors/ovl_Fishing/z_fishing.c
@@ -15,7 +15,7 @@
 #include "cic6105.h"
 #endif
 
-#pragma increment_block_number "gc-eu:141 gc-eu-mq:141 gc-jp:143 gc-jp-ce:143 gc-jp-mq:143 gc-us:143 gc-us-mq:143"
+#pragma increment_block_number "gc-eu:140 gc-eu-mq:140 gc-jp:142 gc-jp-ce:142 gc-jp-mq:142 gc-us:142 gc-us-mq:142"
 
 #define FLAGS ACTOR_FLAG_4
 
diff --git a/tools/disasm/ntsc-1.2/files_boot.csv b/tools/disasm/ntsc-1.2/files_boot.csv
index dcb6f0bf87..66aaa08b36 100644
--- a/tools/disasm/ntsc-1.2/files_boot.csv
+++ b/tools/disasm/ntsc-1.2/files_boot.csv
@@ -11,7 +11,7 @@ FD0,80001430,src/boot/z_locale
 1530,80001990,src/boot/mio0
 15E0,80001A40,src/boot/stackcheck
 17F0,80001C50,src/boot/logutils
-1910,80001D70,src/boot/sleep
+1910,80001D70,src/libc64/sleep
 1AB0,80001F10,src/libultra/io/piacs
 1B70,80001FD0,src/libultra/os/sendmesg
 1CC0,80002120,src/libultra/os/stopthread
diff --git a/tools/disasm/ntsc-1.2/files_code.csv b/tools/disasm/ntsc-1.2/files_code.csv
index dd1ac65e8b..6b8f61f0a2 100644
--- a/tools/disasm/ntsc-1.2/files_code.csv
+++ b/tools/disasm/ntsc-1.2/files_code.csv
@@ -128,13 +128,13 @@ BBA50,800CD130,src/code/loadfragment2_n64
 BBF00,800CD5E0,src/code/padutils
 BC110,800CD7F0,src/code/code_800FC620
 BC530,800CDC10,src/code/padsetup
-BC670,800CDD50,src/code/fp_math
-BCA20,800CE100,src/code/fp
-BCB80,800CE260,src/code/system_malloc
-BCDF0,800CE4D0,src/code/rand
-BCEF0,800CE5D0,src/code/__osMalloc_n64
-BD8A0,800CEF80,src/boot/sprintf
-BD970,800CF050,src/code/printutils
+BC670,800CDD50,src/libc64/math64
+BCA20,800CE100,src/libc64/fp
+BCB80,800CE260,src/libc64/malloc
+BCDF0,800CE4D0,src/libc64/qrand
+BCEF0,800CE5D0,src/libc64/__osMalloc_n64
+BD8A0,800CEF80,src/libc64/sprintf
+BD970,800CF050,src/libc64/aprintf
 BD9D0,800CF0B0,src/code/jpegutils
 BDEE0,800CF5C0,src/code/jpegdecoder
 BE4D0,800CFBB0,src/libultra/os/getintmask
@@ -291,9 +291,9 @@ F3330,80104A10,src/audio/session_config
 F3AD0,801051B0,src/code/gfxprint
 F4380,80105A60,src/code/loadfragment2_n64
 F4390,80105A70,src/code/code_800FC620
-F43A0,80105A80,src/code/rand
-F43B0,80105A90,src/code/__osMalloc_n64
-F43C0,80105AA0,src/boot/sprintf
+F43A0,80105A80,src/libc64/qrand
+F43B0,80105A90,src/libc64/__osMalloc_n64
+F43C0,80105AA0,src/libc64/sprintf
 F4400,80105AE0,src/libultra/gu/sins
 F4C00,801062E0,src/libultra/io/siacs
 F4C10,801062F0,src/libultra/io/controller
@@ -379,8 +379,8 @@ F9180,8010A860,src/audio/session_config
 F9190,8010A870,src/code/gfxprint
 F91D0,8010A8B0,src/code/rcp_utils
 F9320,8010AA00,src/code/loadfragment2_n64
-F94C0,8010ABA0,src/code/fp_math
-F94E0,8010ABC0,src/code/__osMalloc_n64
+F94C0,8010ABA0,src/libc64/math64
+F94E0,8010ABC0,src/libc64/__osMalloc_n64
 F9690,8010AD70,src/libultra/gu/sinf
 F96E0,8010ADC0,src/libultra/gu/perspective
 F96F0,8010ADD0,src/libultra/gu/lookathil
@@ -449,7 +449,7 @@ offset,vram,.bss
 1139C0,801250A0,src/audio/sequence
 114780,80125E60,src/audio/data
 114820,80125F00,src/audio/session_config
-11AC90,8012C370,src/code/system_malloc
+11AC90,8012C370,src/libc64/malloc
 11ACA0,8012C380,src/code/jpegdecoder
 11ACB0,8012C390,src/libultra/io/sptask
 11ACF0,8012C3D0,src/libultra/io/motor