diff --git a/extmod/moductypes.c b/extmod/moductypes.c
index cdbf49ad40..e12b05f962 100644
--- a/extmod/moductypes.c
+++ b/extmod/moductypes.c
@@ -362,7 +362,7 @@ STATIC mp_obj_t get_aligned(uint val_type, void *p, mp_int_t index) {
         case FLOAT32:
             return mp_obj_new_float_from_f(((float *)p)[index]);
         case FLOAT64:
-            return mp_obj_new_float(((double *)p)[index]);
+            return mp_obj_new_float_from_d(((double *)p)[index]);
         #endif
         default:
             assert(0);
diff --git a/lib/libm/asinfacosf.c b/lib/libm/asinfacosf.c
index 07ecad3f3f..22dbb3d228 100644
--- a/lib/libm/asinfacosf.c
+++ b/lib/libm/asinfacosf.c
@@ -23,15 +23,15 @@
 
 // dpgeorge: pio2 was double in original implementation of asinf
 static const float
-pio2_hi = 1.5707962513e+00, /* 0x3fc90fda */
-pio2_lo = 7.5497894159e-08; /* 0x33a22168 */
+pio2_hi = 1.5707962513e+00f, /* 0x3fc90fda */
+pio2_lo = 7.5497894159e-08f; /* 0x33a22168 */
 
 static const float
 /* coefficients for R(x^2) */
-pS0 =  1.6666586697e-01,
-pS1 = -4.2743422091e-02,
-pS2 = -8.6563630030e-03,
-qS1 = -7.0662963390e-01;
+pS0 =  1.6666586697e-01f,
+pS1 = -4.2743422091e-02f,
+pS2 = -8.6563630030e-03f,
+qS1 = -7.0662963390e-01f;
 
 static float R(float z)
 {
diff --git a/lib/libm/atan2f.c b/lib/libm/atan2f.c
index 03d000c9e1..dcbaf821b5 100644
--- a/lib/libm/atan2f.c
+++ b/lib/libm/atan2f.c
@@ -22,8 +22,8 @@
 #include "libm.h"
 
 static const float
-pi     = 3.1415927410e+00, /* 0x40490fdb */
-pi_lo  = -8.7422776573e-08; /* 0xb3bbbd2e */
+pi     = 3.1415927410e+00f, /* 0x40490fdb */
+pi_lo  = -8.7422776573e-08f; /* 0xb3bbbd2e */
 
 float atan2f(float y, float x)
 {
diff --git a/lib/libm/atanf.c b/lib/libm/atanf.c
index 053fc1b6d6..40bc363c29 100644
--- a/lib/libm/atanf.c
+++ b/lib/libm/atanf.c
@@ -23,25 +23,25 @@
 #include "libm.h"
 
 static const float atanhi[] = {
-  4.6364760399e-01, /* atan(0.5)hi 0x3eed6338 */
-  7.8539812565e-01, /* atan(1.0)hi 0x3f490fda */
-  9.8279368877e-01, /* atan(1.5)hi 0x3f7b985e */
-  1.5707962513e+00, /* atan(inf)hi 0x3fc90fda */
+  4.6364760399e-01f, /* atan(0.5)hi 0x3eed6338 */
+  7.8539812565e-01f, /* atan(1.0)hi 0x3f490fda */
+  9.8279368877e-01f, /* atan(1.5)hi 0x3f7b985e */
+  1.5707962513e+00f, /* atan(inf)hi 0x3fc90fda */
 };
 
 static const float atanlo[] = {
-  5.0121582440e-09, /* atan(0.5)lo 0x31ac3769 */
-  3.7748947079e-08, /* atan(1.0)lo 0x33222168 */
-  3.4473217170e-08, /* atan(1.5)lo 0x33140fb4 */
-  7.5497894159e-08, /* atan(inf)lo 0x33a22168 */
+  5.0121582440e-09f, /* atan(0.5)lo 0x31ac3769 */
+  3.7748947079e-08f, /* atan(1.0)lo 0x33222168 */
+  3.4473217170e-08f, /* atan(1.5)lo 0x33140fb4 */
+  7.5497894159e-08f, /* atan(inf)lo 0x33a22168 */
 };
 
 static const float aT[] = {
-  3.3333328366e-01,
- -1.9999158382e-01,
-  1.4253635705e-01,
- -1.0648017377e-01,
-  6.1687607318e-02,
+  3.3333328366e-01f,
+ -1.9999158382e-01f,
+  1.4253635705e-01f,
+ -1.0648017377e-01f,
+  6.1687607318e-02f,
 };
 
 float atanf(float x)
diff --git a/lib/libm/ef_rem_pio2.c b/lib/libm/ef_rem_pio2.c
index ca55243fb4..8111ca197f 100644
--- a/lib/libm/ef_rem_pio2.c
+++ b/lib/libm/ef_rem_pio2.c
@@ -93,16 +93,16 @@ static const float
 #else
 static float 
 #endif
-zero =  0.0000000000e+00, /* 0x00000000 */
-half =  5.0000000000e-01, /* 0x3f000000 */
-two8 =  2.5600000000e+02, /* 0x43800000 */
-invpio2 =  6.3661980629e-01, /* 0x3f22f984 */
-pio2_1  =  1.5707855225e+00, /* 0x3fc90f80 */
-pio2_1t =  1.0804334124e-05, /* 0x37354443 */
-pio2_2  =  1.0804273188e-05, /* 0x37354400 */
-pio2_2t =  6.0770999344e-11, /* 0x2e85a308 */
-pio2_3  =  6.0770943833e-11, /* 0x2e85a300 */
-pio2_3t =  6.1232342629e-17; /* 0x248d3132 */
+zero =  0.0000000000e+00f, /* 0x00000000 */
+half =  5.0000000000e-01f, /* 0x3f000000 */
+two8 =  2.5600000000e+02f, /* 0x43800000 */
+invpio2 =  6.3661980629e-01f, /* 0x3f22f984 */
+pio2_1  =  1.5707855225e+00f, /* 0x3fc90f80 */
+pio2_1t =  1.0804334124e-05f, /* 0x37354443 */
+pio2_2  =  1.0804273188e-05f, /* 0x37354400 */
+pio2_2t =  6.0770999344e-11f, /* 0x2e85a308 */
+pio2_3  =  6.0770943833e-11f, /* 0x2e85a300 */
+pio2_3t =  6.1232342629e-17f; /* 0x248d3132 */
 
 #ifdef __STDC__
 	__int32_t __ieee754_rem_pio2f(float x, float *y)
diff --git a/lib/libm/ef_sqrt.c b/lib/libm/ef_sqrt.c
index 87484d0bf0..7f46ef6387 100644
--- a/lib/libm/ef_sqrt.c
+++ b/lib/libm/ef_sqrt.c
@@ -25,9 +25,9 @@
 #include "fdlibm.h"
 
 #ifdef __STDC__
-static	const float	one	= 1.0, tiny=1.0e-30;
+static	const float	one	= 1.0f, tiny=1.0e-30f;
 #else
-static	float	one	= 1.0, tiny=1.0e-30;
+static	float	one	= 1.0f, tiny=1.0e-30f;
 #endif
 
 // sqrtf is exactly __ieee754_sqrtf when _IEEE_LIBM defined
diff --git a/lib/libm/erf_lgamma.c b/lib/libm/erf_lgamma.c
index 877816a0c2..1a33f47035 100644
--- a/lib/libm/erf_lgamma.c
+++ b/lib/libm/erf_lgamma.c
@@ -32,77 +32,77 @@ static const float
 #else
 static float 
 #endif
-two23=  8.3886080000e+06, /* 0x4b000000 */
-half=  5.0000000000e-01, /* 0x3f000000 */
-one =  1.0000000000e+00, /* 0x3f800000 */
-pi  =  3.1415927410e+00, /* 0x40490fdb */
-a0  =  7.7215664089e-02, /* 0x3d9e233f */
-a1  =  3.2246702909e-01, /* 0x3ea51a66 */
-a2  =  6.7352302372e-02, /* 0x3d89f001 */
-a3  =  2.0580807701e-02, /* 0x3ca89915 */
-a4  =  7.3855509982e-03, /* 0x3bf2027e */
-a5  =  2.8905137442e-03, /* 0x3b3d6ec6 */
-a6  =  1.1927076848e-03, /* 0x3a9c54a1 */
-a7  =  5.1006977446e-04, /* 0x3a05b634 */
-a8  =  2.2086278477e-04, /* 0x39679767 */
-a9  =  1.0801156895e-04, /* 0x38e28445 */
-a10 =  2.5214456400e-05, /* 0x37d383a2 */
-a11 =  4.4864096708e-05, /* 0x383c2c75 */
-tc  =  1.4616321325e+00, /* 0x3fbb16c3 */
-tf  = -1.2148628384e-01, /* 0xbdf8cdcd */
+two23=  8.3886080000e+06f, /* 0x4b000000 */
+half=  5.0000000000e-01f, /* 0x3f000000 */
+one =  1.0000000000e+00f, /* 0x3f800000 */
+pi  =  3.1415927410e+00f, /* 0x40490fdb */
+a0  =  7.7215664089e-02f, /* 0x3d9e233f */
+a1  =  3.2246702909e-01f, /* 0x3ea51a66 */
+a2  =  6.7352302372e-02f, /* 0x3d89f001 */
+a3  =  2.0580807701e-02f, /* 0x3ca89915 */
+a4  =  7.3855509982e-03f, /* 0x3bf2027e */
+a5  =  2.8905137442e-03f, /* 0x3b3d6ec6 */
+a6  =  1.1927076848e-03f, /* 0x3a9c54a1 */
+a7  =  5.1006977446e-04f, /* 0x3a05b634 */
+a8  =  2.2086278477e-04f, /* 0x39679767 */
+a9  =  1.0801156895e-04f, /* 0x38e28445 */
+a10 =  2.5214456400e-05f, /* 0x37d383a2 */
+a11 =  4.4864096708e-05f, /* 0x383c2c75 */
+tc  =  1.4616321325e+00f, /* 0x3fbb16c3 */
+tf  = -1.2148628384e-01f, /* 0xbdf8cdcd */
 /* tt = -(tail of tf) */
-tt  =  6.6971006518e-09, /* 0x31e61c52 */
-t0  =  4.8383611441e-01, /* 0x3ef7b95e */
-t1  = -1.4758771658e-01, /* 0xbe17213c */
-t2  =  6.4624942839e-02, /* 0x3d845a15 */
-t3  = -3.2788541168e-02, /* 0xbd064d47 */
-t4  =  1.7970675603e-02, /* 0x3c93373d */
-t5  = -1.0314224288e-02, /* 0xbc28fcfe */
-t6  =  6.1005386524e-03, /* 0x3bc7e707 */
-t7  = -3.6845202558e-03, /* 0xbb7177fe */
-t8  =  2.2596477065e-03, /* 0x3b141699 */
-t9  = -1.4034647029e-03, /* 0xbab7f476 */
-t10 =  8.8108185446e-04, /* 0x3a66f867 */
-t11 = -5.3859531181e-04, /* 0xba0d3085 */
-t12 =  3.1563205994e-04, /* 0x39a57b6b */
-t13 = -3.1275415677e-04, /* 0xb9a3f927 */
-t14 =  3.3552918467e-04, /* 0x39afe9f7 */
-u0  = -7.7215664089e-02, /* 0xbd9e233f */
-u1  =  6.3282704353e-01, /* 0x3f2200f4 */
-u2  =  1.4549225569e+00, /* 0x3fba3ae7 */
-u3  =  9.7771751881e-01, /* 0x3f7a4bb2 */
-u4  =  2.2896373272e-01, /* 0x3e6a7578 */
-u5  =  1.3381091878e-02, /* 0x3c5b3c5e */
-v1  =  2.4559779167e+00, /* 0x401d2ebe */
-v2  =  2.1284897327e+00, /* 0x4008392d */
-v3  =  7.6928514242e-01, /* 0x3f44efdf */
-v4  =  1.0422264785e-01, /* 0x3dd572af */
-v5  =  3.2170924824e-03, /* 0x3b52d5db */
-s0  = -7.7215664089e-02, /* 0xbd9e233f */
-s1  =  2.1498242021e-01, /* 0x3e5c245a */
-s2  =  3.2577878237e-01, /* 0x3ea6cc7a */
-s3  =  1.4635047317e-01, /* 0x3e15dce6 */
-s4  =  2.6642270386e-02, /* 0x3cda40e4 */
-s5  =  1.8402845599e-03, /* 0x3af135b4 */
-s6  =  3.1947532989e-05, /* 0x3805ff67 */
-r1  =  1.3920053244e+00, /* 0x3fb22d3b */
-r2  =  7.2193557024e-01, /* 0x3f38d0c5 */
-r3  =  1.7193385959e-01, /* 0x3e300f6e */
-r4  =  1.8645919859e-02, /* 0x3c98bf54 */
-r5  =  7.7794247773e-04, /* 0x3a4beed6 */
-r6  =  7.3266842264e-06, /* 0x36f5d7bd */
-w0  =  4.1893854737e-01, /* 0x3ed67f1d */
-w1  =  8.3333335817e-02, /* 0x3daaaaab */
-w2  = -2.7777778450e-03, /* 0xbb360b61 */
-w3  =  7.9365057172e-04, /* 0x3a500cfd */
-w4  = -5.9518753551e-04, /* 0xba1c065c */
-w5  =  8.3633989561e-04, /* 0x3a5b3dd2 */
-w6  = -1.6309292987e-03; /* 0xbad5c4e8 */
+tt  =  6.6971006518e-09f, /* 0x31e61c52 */
+t0  =  4.8383611441e-01f, /* 0x3ef7b95e */
+t1  = -1.4758771658e-01f, /* 0xbe17213c */
+t2  =  6.4624942839e-02f, /* 0x3d845a15 */
+t3  = -3.2788541168e-02f, /* 0xbd064d47 */
+t4  =  1.7970675603e-02f, /* 0x3c93373d */
+t5  = -1.0314224288e-02f, /* 0xbc28fcfe */
+t6  =  6.1005386524e-03f, /* 0x3bc7e707 */
+t7  = -3.6845202558e-03f, /* 0xbb7177fe */
+t8  =  2.2596477065e-03f, /* 0x3b141699 */
+t9  = -1.4034647029e-03f, /* 0xbab7f476 */
+t10 =  8.8108185446e-04f, /* 0x3a66f867 */
+t11 = -5.3859531181e-04f, /* 0xba0d3085 */
+t12 =  3.1563205994e-04f, /* 0x39a57b6b */
+t13 = -3.1275415677e-04f, /* 0xb9a3f927 */
+t14 =  3.3552918467e-04f, /* 0x39afe9f7 */
+u0  = -7.7215664089e-02f, /* 0xbd9e233f */
+u1  =  6.3282704353e-01f, /* 0x3f2200f4 */
+u2  =  1.4549225569e+00f, /* 0x3fba3ae7 */
+u3  =  9.7771751881e-01f, /* 0x3f7a4bb2 */
+u4  =  2.2896373272e-01f, /* 0x3e6a7578 */
+u5  =  1.3381091878e-02f, /* 0x3c5b3c5e */
+v1  =  2.4559779167e+00f, /* 0x401d2ebe */
+v2  =  2.1284897327e+00f, /* 0x4008392d */
+v3  =  7.6928514242e-01f, /* 0x3f44efdf */
+v4  =  1.0422264785e-01f, /* 0x3dd572af */
+v5  =  3.2170924824e-03f, /* 0x3b52d5db */
+s0  = -7.7215664089e-02f, /* 0xbd9e233f */
+s1  =  2.1498242021e-01f, /* 0x3e5c245a */
+s2  =  3.2577878237e-01f, /* 0x3ea6cc7a */
+s3  =  1.4635047317e-01f, /* 0x3e15dce6 */
+s4  =  2.6642270386e-02f, /* 0x3cda40e4 */
+s5  =  1.8402845599e-03f, /* 0x3af135b4 */
+s6  =  3.1947532989e-05f, /* 0x3805ff67 */
+r1  =  1.3920053244e+00f, /* 0x3fb22d3b */
+r2  =  7.2193557024e-01f, /* 0x3f38d0c5 */
+r3  =  1.7193385959e-01f, /* 0x3e300f6e */
+r4  =  1.8645919859e-02f, /* 0x3c98bf54 */
+r5  =  7.7794247773e-04f, /* 0x3a4beed6 */
+r6  =  7.3266842264e-06f, /* 0x36f5d7bd */
+w0  =  4.1893854737e-01f, /* 0x3ed67f1d */
+w1  =  8.3333335817e-02f, /* 0x3daaaaab */
+w2  = -2.7777778450e-03f, /* 0xbb360b61 */
+w3  =  7.9365057172e-04f, /* 0x3a500cfd */
+w4  = -5.9518753551e-04f, /* 0xba1c065c */
+w5  =  8.3633989561e-04f, /* 0x3a5b3dd2 */
+w6  = -1.6309292987e-03f; /* 0xbad5c4e8 */
 
 #ifdef __STDC__
-static const float zero=  0.0000000000e+00;
+static const float zero=  0.0000000000e+00f;
 #else
-static float zero=  0.0000000000e+00;
+static float zero=  0.0000000000e+00f;
 #endif
 
 #ifdef __STDC__
diff --git a/lib/libm/kf_cos.c b/lib/libm/kf_cos.c
index 691f9842fd..58ffc65861 100644
--- a/lib/libm/kf_cos.c
+++ b/lib/libm/kf_cos.c
@@ -29,13 +29,13 @@ static const float
 #else
 static float 
 #endif
-one =  1.0000000000e+00, /* 0x3f800000 */
-C1  =  4.1666667908e-02, /* 0x3d2aaaab */
-C2  = -1.3888889225e-03, /* 0xbab60b61 */
-C3  =  2.4801587642e-05, /* 0x37d00d01 */
-C4  = -2.7557314297e-07, /* 0xb493f27c */
-C5  =  2.0875723372e-09, /* 0x310f74f6 */
-C6  = -1.1359647598e-11; /* 0xad47d74e */
+one =  1.0000000000e+00f, /* 0x3f800000 */
+C1  =  4.1666667908e-02f, /* 0x3d2aaaab */
+C2  = -1.3888889225e-03f, /* 0xbab60b61 */
+C3  =  2.4801587642e-05f, /* 0x37d00d01 */
+C4  = -2.7557314297e-07f, /* 0xb493f27c */
+C5  =  2.0875723372e-09f, /* 0x310f74f6 */
+C6  = -1.1359647598e-11f; /* 0xad47d74e */
 
 #ifdef __STDC__
 	float __kernel_cosf(float x, float y)
diff --git a/lib/libm/kf_rem_pio2.c b/lib/libm/kf_rem_pio2.c
index c7e9479571..6bd4d287e6 100644
--- a/lib/libm/kf_rem_pio2.c
+++ b/lib/libm/kf_rem_pio2.c
@@ -38,17 +38,17 @@ static const float PIo2[] = {
 #else
 static float PIo2[] = {
 #endif
-  1.5703125000e+00, /* 0x3fc90000 */
-  4.5776367188e-04, /* 0x39f00000 */
-  2.5987625122e-05, /* 0x37da0000 */
-  7.5437128544e-08, /* 0x33a20000 */
-  6.0026650317e-11, /* 0x2e840000 */
-  7.3896444519e-13, /* 0x2b500000 */
-  5.3845816694e-15, /* 0x27c20000 */
-  5.6378512969e-18, /* 0x22d00000 */
-  8.3009228831e-20, /* 0x1fc40000 */
-  3.2756352257e-22, /* 0x1bc60000 */
-  6.3331015649e-25, /* 0x17440000 */
+  1.5703125000e+00f, /* 0x3fc90000 */
+  4.5776367188e-04f, /* 0x39f00000 */
+  2.5987625122e-05f, /* 0x37da0000 */
+  7.5437128544e-08f, /* 0x33a20000 */
+  6.0026650317e-11f, /* 0x2e840000 */
+  7.3896444519e-13f, /* 0x2b500000 */
+  5.3845816694e-15f, /* 0x27c20000 */
+  5.6378512969e-18f, /* 0x22d00000 */
+  8.3009228831e-20f, /* 0x1fc40000 */
+  3.2756352257e-22f, /* 0x1bc60000 */
+  6.3331015649e-25f, /* 0x17440000 */
 };
 
 #ifdef __STDC__
@@ -56,10 +56,10 @@ static const float
 #else
 static float			
 #endif
-zero   = 0.0,
-one    = 1.0,
-two8   =  2.5600000000e+02, /* 0x43800000 */
-twon8  =  3.9062500000e-03; /* 0x3b800000 */
+zero   = 0.0f,
+one    = 1.0f,
+two8   =  2.5600000000e+02f, /* 0x43800000 */
+twon8  =  3.9062500000e-03f; /* 0x3b800000 */
 
 #ifdef __STDC__
 	int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const __int32_t *ipio2) 
diff --git a/lib/libm/kf_sin.c b/lib/libm/kf_sin.c
index 07ea993446..5fb86fbe82 100644
--- a/lib/libm/kf_sin.c
+++ b/lib/libm/kf_sin.c
@@ -29,13 +29,13 @@ static const float
 #else
 static float 
 #endif
-half =  5.0000000000e-01,/* 0x3f000000 */
-S1  = -1.6666667163e-01, /* 0xbe2aaaab */
-S2  =  8.3333337680e-03, /* 0x3c088889 */
-S3  = -1.9841270114e-04, /* 0xb9500d01 */
-S4  =  2.7557314297e-06, /* 0x3638ef1b */
-S5  = -2.5050759689e-08, /* 0xb2d72f34 */
-S6  =  1.5896910177e-10; /* 0x2f2ec9d3 */
+half =  5.0000000000e-01f,/* 0x3f000000 */
+S1  = -1.6666667163e-01f, /* 0xbe2aaaab */
+S2  =  8.3333337680e-03f, /* 0x3c088889 */
+S3  = -1.9841270114e-04f, /* 0xb9500d01 */
+S4  =  2.7557314297e-06f, /* 0x3638ef1b */
+S5  = -2.5050759689e-08f, /* 0xb2d72f34 */
+S6  =  1.5896910177e-10f; /* 0x2f2ec9d3 */
 
 #ifdef __STDC__
 	float __kernel_sinf(float x, float y, int iy)
diff --git a/lib/libm/kf_tan.c b/lib/libm/kf_tan.c
index 6da9bd8171..a9c8993394 100644
--- a/lib/libm/kf_tan.c
+++ b/lib/libm/kf_tan.c
@@ -28,23 +28,23 @@ static const float
 #else
 static float 
 #endif
-one   =  1.0000000000e+00, /* 0x3f800000 */
-pio4  =  7.8539812565e-01, /* 0x3f490fda */
-pio4lo=  3.7748947079e-08, /* 0x33222168 */
+one   =  1.0000000000e+00f, /* 0x3f800000 */
+pio4  =  7.8539812565e-01f, /* 0x3f490fda */
+pio4lo=  3.7748947079e-08f, /* 0x33222168 */
 T[] =  {
-  3.3333334327e-01, /* 0x3eaaaaab */
-  1.3333334029e-01, /* 0x3e088889 */
-  5.3968254477e-02, /* 0x3d5d0dd1 */
-  2.1869488060e-02, /* 0x3cb327a4 */
-  8.8632395491e-03, /* 0x3c11371f */
-  3.5920790397e-03, /* 0x3b6b6916 */
-  1.4562094584e-03, /* 0x3abede48 */
-  5.8804126456e-04, /* 0x3a1a26c8 */
-  2.4646313977e-04, /* 0x398137b9 */
-  7.8179444245e-05, /* 0x38a3f445 */
-  7.1407252108e-05, /* 0x3895c07a */
- -1.8558637748e-05, /* 0xb79bae5f */
-  2.5907305826e-05, /* 0x37d95384 */
+  3.3333334327e-01f, /* 0x3eaaaaab */
+  1.3333334029e-01f, /* 0x3e088889 */
+  5.3968254477e-02f, /* 0x3d5d0dd1 */
+  2.1869488060e-02f, /* 0x3cb327a4 */
+  8.8632395491e-03f, /* 0x3c11371f */
+  3.5920790397e-03f, /* 0x3b6b6916 */
+  1.4562094584e-03f, /* 0x3abede48 */
+  5.8804126456e-04f, /* 0x3a1a26c8 */
+  2.4646313977e-04f, /* 0x398137b9 */
+  7.8179444245e-05f, /* 0x38a3f445 */
+  7.1407252108e-05f, /* 0x3895c07a */
+ -1.8558637748e-05f, /* 0xb79bae5f */
+  2.5907305826e-05f, /* 0x37d95384 */
 };
 
 #ifdef __STDC__
diff --git a/lib/libm/log1pf.c b/lib/libm/log1pf.c
index 0d32b0a2fe..9585f5b801 100644
--- a/lib/libm/log1pf.c
+++ b/lib/libm/log1pf.c
@@ -19,13 +19,13 @@
 #include "libm.h"
 
 static const float
-ln2_hi = 6.9313812256e-01, /* 0x3f317180 */
-ln2_lo = 9.0580006145e-06, /* 0x3717f7d1 */
+ln2_hi = 6.9313812256e-01f, /* 0x3f317180 */
+ln2_lo = 9.0580006145e-06f, /* 0x3717f7d1 */
 /* |(log(1+s)-log(1-s))/s - Lg(s)| < 2**-34.24 (~[-4.95e-11, 4.97e-11]). */
-Lg1 = 0xaaaaaa.0p-24, /* 0.66666662693 */
-Lg2 = 0xccce13.0p-25, /* 0.40000972152 */
-Lg3 = 0x91e9ee.0p-25, /* 0.28498786688 */
-Lg4 = 0xf89e26.0p-26; /* 0.24279078841 */
+Lg1 = 0xaaaaaa.0p-24f, /* 0.66666662693 */
+Lg2 = 0xccce13.0p-25f, /* 0.40000972152 */
+Lg3 = 0x91e9ee.0p-25f, /* 0.28498786688 */
+Lg4 = 0xf89e26.0p-26f; /* 0.24279078841 */
 
 float log1pf(float x)
 {
diff --git a/lib/libm/math.c b/lib/libm/math.c
index c23b9f8d36..2c52edd1be 100644
--- a/lib/libm/math.c
+++ b/lib/libm/math.c
@@ -53,7 +53,7 @@ float copysignf(float x, float y) {
 }
 #endif
 
-static const float _M_LN10 = 2.30258509299404; // 0x40135d8e
+static const float _M_LN10 = 2.30258509299404f; // 0x40135d8e
 float log10f(float x) { return logf(x) / (float)_M_LN10; }
 
 float tanhf(float x) {
@@ -139,34 +139,34 @@ float scalbnf(float x, int n)
  */
 
 static const float
-bp[]   = {1.0, 1.5,},
-dp_h[] = { 0.0, 5.84960938e-01,}, /* 0x3f15c000 */
-dp_l[] = { 0.0, 1.56322085e-06,}, /* 0x35d1cfdc */
-two24  =  16777216.0,  /* 0x4b800000 */
-huge   =  1.0e30,
-tiny   =  1.0e-30,
+bp[]   = {1.0f, 1.5f,},
+dp_h[] = { 0.0f, 5.84960938e-01f,}, /* 0x3f15c000 */
+dp_l[] = { 0.0f, 1.56322085e-06f,}, /* 0x35d1cfdc */
+two24  =  16777216.0f,  /* 0x4b800000 */
+huge   =  1.0e30f,
+tiny   =  1.0e-30f,
 /* poly coefs for (3/2)*(log(x)-2s-2/3*s**3 */
-L1 =  6.0000002384e-01, /* 0x3f19999a */
-L2 =  4.2857143283e-01, /* 0x3edb6db7 */
-L3 =  3.3333334327e-01, /* 0x3eaaaaab */
-L4 =  2.7272811532e-01, /* 0x3e8ba305 */
-L5 =  2.3066075146e-01, /* 0x3e6c3255 */
-L6 =  2.0697501302e-01, /* 0x3e53f142 */
-P1 =  1.6666667163e-01, /* 0x3e2aaaab */
-P2 = -2.7777778450e-03, /* 0xbb360b61 */
-P3 =  6.6137559770e-05, /* 0x388ab355 */
-P4 = -1.6533901999e-06, /* 0xb5ddea0e */
-P5 =  4.1381369442e-08, /* 0x3331bb4c */
-lg2     =  6.9314718246e-01, /* 0x3f317218 */
-lg2_h   =  6.93145752e-01,   /* 0x3f317200 */
-lg2_l   =  1.42860654e-06,   /* 0x35bfbe8c */
-ovt     =  4.2995665694e-08, /* -(128-log2(ovfl+.5ulp)) */
-cp      =  9.6179670095e-01, /* 0x3f76384f =2/(3ln2) */
-cp_h    =  9.6191406250e-01, /* 0x3f764000 =12b cp */
-cp_l    = -1.1736857402e-04, /* 0xb8f623c6 =tail of cp_h */
-ivln2   =  1.4426950216e+00, /* 0x3fb8aa3b =1/ln2 */
-ivln2_h =  1.4426879883e+00, /* 0x3fb8aa00 =16b 1/ln2*/
-ivln2_l =  7.0526075433e-06; /* 0x36eca570 =1/ln2 tail*/
+L1 =  6.0000002384e-01f, /* 0x3f19999a */
+L2 =  4.2857143283e-01f, /* 0x3edb6db7 */
+L3 =  3.3333334327e-01f, /* 0x3eaaaaab */
+L4 =  2.7272811532e-01f, /* 0x3e8ba305 */
+L5 =  2.3066075146e-01f, /* 0x3e6c3255 */
+L6 =  2.0697501302e-01f, /* 0x3e53f142 */
+P1 =  1.6666667163e-01f, /* 0x3e2aaaab */
+P2 = -2.7777778450e-03f, /* 0xbb360b61 */
+P3 =  6.6137559770e-05f, /* 0x388ab355 */
+P4 = -1.6533901999e-06f, /* 0xb5ddea0e */
+P5 =  4.1381369442e-08f, /* 0x3331bb4c */
+lg2     =  6.9314718246e-01f, /* 0x3f317218 */
+lg2_h   =  6.93145752e-01f,   /* 0x3f317200 */
+lg2_l   =  1.42860654e-06f,   /* 0x35bfbe8c */
+ovt     =  4.2995665694e-08f, /* -(128-log2(ovfl+.5ulp)) */
+cp      =  9.6179670095e-01f, /* 0x3f76384f =2/(3ln2) */
+cp_h    =  9.6191406250e-01f, /* 0x3f764000 =12b cp */
+cp_l    = -1.1736857402e-04f, /* 0xb8f623c6 =tail of cp_h */
+ivln2   =  1.4426950216e+00f, /* 0x3fb8aa3b =1/ln2 */
+ivln2_h =  1.4426879883e+00f, /* 0x3fb8aa00 =16b 1/ln2*/
+ivln2_l =  7.0526075433e-06f; /* 0x36eca570 =1/ln2 tail*/
 
 float powf(float x, float y)
 {
@@ -403,7 +403,7 @@ float powf(float x, float y)
  */
 
 static const float
-half[2] = {0.5,-0.5},
+half[2] = {0.5f,-0.5f},
 ln2hi   = 6.9314575195e-1f,  /* 0x3f317200 */
 ln2lo   = 1.4286067653e-6f,  /* 0x35bfbe8e */
 invln2  = 1.4426950216e+0f,  /* 0x3fb8aa3b */
@@ -489,17 +489,17 @@ float expf(float x)
  */
 
 static const float
-o_threshold = 8.8721679688e+01, /* 0x42b17180 */
-ln2_hi      = 6.9313812256e-01, /* 0x3f317180 */
-ln2_lo      = 9.0580006145e-06, /* 0x3717f7d1 */
+o_threshold = 8.8721679688e+01f, /* 0x42b17180 */
+ln2_hi      = 6.9313812256e-01f, /* 0x3f317180 */
+ln2_lo      = 9.0580006145e-06f, /* 0x3717f7d1 */
 //invln2      = 1.4426950216e+00, /* 0x3fb8aa3b */
 /*
  * Domain [-0.34568, 0.34568], range ~[-6.694e-10, 6.696e-10]:
  * |6 / x * (1 + 2 * (1 / (exp(x) - 1) - 1 / x)) - q(x)| < 2**-30.04
  * Scaled coefficients: Qn_here = 2**n * Qn_for_q (see s_expm1.c):
  */
-Q1 = -3.3333212137e-2, /* -0x888868.0p-28 */
-Q2 =  1.5807170421e-3; /*  0xcf3010.0p-33 */
+Q1 = -3.3333212137e-2f, /* -0x888868.0p-28 */
+Q2 =  1.5807170421e-3f; /*  0xcf3010.0p-33 */
 
 float expm1f(float x)
 {
diff --git a/lib/libm/sf_erf.c b/lib/libm/sf_erf.c
index 3f0172c6e9..85af35afd7 100644
--- a/lib/libm/sf_erf.c
+++ b/lib/libm/sf_erf.c
@@ -35,79 +35,79 @@ static const float
 #else
 static float
 #endif
-tiny	    = 1e-30,
-half=  5.0000000000e-01, /* 0x3F000000 */
-one =  1.0000000000e+00, /* 0x3F800000 */
-two =  2.0000000000e+00, /* 0x40000000 */
+tiny	    = 1e-30f,
+half=  5.0000000000e-01f, /* 0x3F000000 */
+one =  1.0000000000e+00f, /* 0x3F800000 */
+two =  2.0000000000e+00f, /* 0x40000000 */
 	/* c = (subfloat)0.84506291151 */
-erx =  8.4506291151e-01, /* 0x3f58560b */
+erx =  8.4506291151e-01f, /* 0x3f58560b */
 /*
  * Coefficients for approximation to  erf on [0,0.84375]
  */
-efx =  1.2837916613e-01, /* 0x3e0375d4 */
-efx8=  1.0270333290e+00, /* 0x3f8375d4 */
-pp0  =  1.2837916613e-01, /* 0x3e0375d4 */
-pp1  = -3.2504209876e-01, /* 0xbea66beb */
-pp2  = -2.8481749818e-02, /* 0xbce9528f */
-pp3  = -5.7702702470e-03, /* 0xbbbd1489 */
-pp4  = -2.3763017452e-05, /* 0xb7c756b1 */
-qq1  =  3.9791721106e-01, /* 0x3ecbbbce */
-qq2  =  6.5022252500e-02, /* 0x3d852a63 */
-qq3  =  5.0813062117e-03, /* 0x3ba68116 */
-qq4  =  1.3249473704e-04, /* 0x390aee49 */
-qq5  = -3.9602282413e-06, /* 0xb684e21a */
+efx =  1.2837916613e-01f, /* 0x3e0375d4 */
+efx8=  1.0270333290e+00f, /* 0x3f8375d4 */
+pp0  =  1.2837916613e-01f, /* 0x3e0375d4 */
+pp1  = -3.2504209876e-01f, /* 0xbea66beb */
+pp2  = -2.8481749818e-02f, /* 0xbce9528f */
+pp3  = -5.7702702470e-03f, /* 0xbbbd1489 */
+pp4  = -2.3763017452e-05f, /* 0xb7c756b1 */
+qq1  =  3.9791721106e-01f, /* 0x3ecbbbce */
+qq2  =  6.5022252500e-02f, /* 0x3d852a63 */
+qq3  =  5.0813062117e-03f, /* 0x3ba68116 */
+qq4  =  1.3249473704e-04f, /* 0x390aee49 */
+qq5  = -3.9602282413e-06f, /* 0xb684e21a */
 /*
  * Coefficients for approximation to  erf  in [0.84375,1.25] 
  */
-pa0  = -2.3621185683e-03, /* 0xbb1acdc6 */
-pa1  =  4.1485610604e-01, /* 0x3ed46805 */
-pa2  = -3.7220788002e-01, /* 0xbebe9208 */
-pa3  =  3.1834661961e-01, /* 0x3ea2fe54 */
-pa4  = -1.1089469492e-01, /* 0xbde31cc2 */
-pa5  =  3.5478305072e-02, /* 0x3d1151b3 */
-pa6  = -2.1663755178e-03, /* 0xbb0df9c0 */
-qa1  =  1.0642088205e-01, /* 0x3dd9f331 */
-qa2  =  5.4039794207e-01, /* 0x3f0a5785 */
-qa3  =  7.1828655899e-02, /* 0x3d931ae7 */
-qa4  =  1.2617121637e-01, /* 0x3e013307 */
-qa5  =  1.3637083583e-02, /* 0x3c5f6e13 */
-qa6  =  1.1984500103e-02, /* 0x3c445aa3 */
+pa0  = -2.3621185683e-03f, /* 0xbb1acdc6 */
+pa1  =  4.1485610604e-01f, /* 0x3ed46805 */
+pa2  = -3.7220788002e-01f, /* 0xbebe9208 */
+pa3  =  3.1834661961e-01f, /* 0x3ea2fe54 */
+pa4  = -1.1089469492e-01f, /* 0xbde31cc2 */
+pa5  =  3.5478305072e-02f, /* 0x3d1151b3 */
+pa6  = -2.1663755178e-03f, /* 0xbb0df9c0 */
+qa1  =  1.0642088205e-01f, /* 0x3dd9f331 */
+qa2  =  5.4039794207e-01f, /* 0x3f0a5785 */
+qa3  =  7.1828655899e-02f, /* 0x3d931ae7 */
+qa4  =  1.2617121637e-01f, /* 0x3e013307 */
+qa5  =  1.3637083583e-02f, /* 0x3c5f6e13 */
+qa6  =  1.1984500103e-02f, /* 0x3c445aa3 */
 /*
  * Coefficients for approximation to  erfc in [1.25,1/0.35]
  */
-ra0  = -9.8649440333e-03, /* 0xbc21a093 */
-ra1  = -6.9385856390e-01, /* 0xbf31a0b7 */
-ra2  = -1.0558626175e+01, /* 0xc128f022 */
-ra3  = -6.2375331879e+01, /* 0xc2798057 */
-ra4  = -1.6239666748e+02, /* 0xc322658c */
-ra5  = -1.8460508728e+02, /* 0xc3389ae7 */
-ra6  = -8.1287437439e+01, /* 0xc2a2932b */
-ra7  = -9.8143291473e+00, /* 0xc11d077e */
-sa1  =  1.9651271820e+01, /* 0x419d35ce */
-sa2  =  1.3765776062e+02, /* 0x4309a863 */
-sa3  =  4.3456588745e+02, /* 0x43d9486f */
-sa4  =  6.4538726807e+02, /* 0x442158c9 */
-sa5  =  4.2900814819e+02, /* 0x43d6810b */
-sa6  =  1.0863500214e+02, /* 0x42d9451f */
-sa7  =  6.5702495575e+00, /* 0x40d23f7c */
-sa8  = -6.0424413532e-02, /* 0xbd777f97 */
+ra0  = -9.8649440333e-03f, /* 0xbc21a093 */
+ra1  = -6.9385856390e-01f, /* 0xbf31a0b7 */
+ra2  = -1.0558626175e+01f, /* 0xc128f022 */
+ra3  = -6.2375331879e+01f, /* 0xc2798057 */
+ra4  = -1.6239666748e+02f, /* 0xc322658c */
+ra5  = -1.8460508728e+02f, /* 0xc3389ae7 */
+ra6  = -8.1287437439e+01f, /* 0xc2a2932b */
+ra7  = -9.8143291473e+00f, /* 0xc11d077e */
+sa1  =  1.9651271820e+01f, /* 0x419d35ce */
+sa2  =  1.3765776062e+02f, /* 0x4309a863 */
+sa3  =  4.3456588745e+02f, /* 0x43d9486f */
+sa4  =  6.4538726807e+02f, /* 0x442158c9 */
+sa5  =  4.2900814819e+02f, /* 0x43d6810b */
+sa6  =  1.0863500214e+02f, /* 0x42d9451f */
+sa7  =  6.5702495575e+00f, /* 0x40d23f7c */
+sa8  = -6.0424413532e-02f, /* 0xbd777f97 */
 /*
  * Coefficients for approximation to  erfc in [1/.35,28]
  */
-rb0  = -9.8649431020e-03, /* 0xbc21a092 */
-rb1  = -7.9928326607e-01, /* 0xbf4c9dd4 */
-rb2  = -1.7757955551e+01, /* 0xc18e104b */
-rb3  = -1.6063638306e+02, /* 0xc320a2ea */
-rb4  = -6.3756646729e+02, /* 0xc41f6441 */
-rb5  = -1.0250950928e+03, /* 0xc480230b */
-rb6  = -4.8351919556e+02, /* 0xc3f1c275 */
-sb1  =  3.0338060379e+01, /* 0x41f2b459 */
-sb2  =  3.2579251099e+02, /* 0x43a2e571 */
-sb3  =  1.5367296143e+03, /* 0x44c01759 */
-sb4  =  3.1998581543e+03, /* 0x4547fdbb */
-sb5  =  2.5530502930e+03, /* 0x451f90ce */
-sb6  =  4.7452853394e+02, /* 0x43ed43a7 */
-sb7  = -2.2440952301e+01; /* 0xc1b38712 */
+rb0  = -9.8649431020e-03f, /* 0xbc21a092 */
+rb1  = -7.9928326607e-01f, /* 0xbf4c9dd4 */
+rb2  = -1.7757955551e+01f, /* 0xc18e104b */
+rb3  = -1.6063638306e+02f, /* 0xc320a2ea */
+rb4  = -6.3756646729e+02f, /* 0xc41f6441 */
+rb5  = -1.0250950928e+03f, /* 0xc480230b */
+rb6  = -4.8351919556e+02f, /* 0xc3f1c275 */
+sb1  =  3.0338060379e+01f, /* 0x41f2b459 */
+sb2  =  3.2579251099e+02f, /* 0x43a2e571 */
+sb3  =  1.5367296143e+03f, /* 0x44c01759 */
+sb4  =  3.1998581543e+03f, /* 0x4547fdbb */
+sb5  =  2.5530502930e+03f, /* 0x451f90ce */
+sb6  =  4.7452853394e+02f, /* 0x43ed43a7 */
+sb7  = -2.2440952301e+01f; /* 0xc1b38712 */
 
 #ifdef __STDC__
 	float erff(float x) 
diff --git a/lib/libm/sf_frexp.c b/lib/libm/sf_frexp.c
index df50fb7737..378f21fb2f 100644
--- a/lib/libm/sf_frexp.c
+++ b/lib/libm/sf_frexp.c
@@ -29,7 +29,7 @@ static const float
 #else
 static float
 #endif
-two25 =  3.3554432000e+07; /* 0x4c000000 */
+two25 =  3.3554432000e+07f; /* 0x4c000000 */
 
 #ifdef __STDC__
 	float frexpf(float x, int *eptr)
diff --git a/lib/libm/sf_modf.c b/lib/libm/sf_modf.c
index 410db2a373..7c1b81399d 100644
--- a/lib/libm/sf_modf.c
+++ b/lib/libm/sf_modf.c
@@ -25,9 +25,9 @@
 #include "fdlibm.h"
 
 #ifdef __STDC__
-static const float one = 1.0;
+static const float one = 1.0f;
 #else
-static float one = 1.0;
+static float one = 1.0f;
 #endif
 
 #ifdef __STDC__
diff --git a/ports/stm32/adc.c b/ports/stm32/adc.c
index 1ecd06bca3..937b6470bc 100644
--- a/ports/stm32/adc.c
+++ b/ports/stm32/adc.c
@@ -763,7 +763,7 @@ STATIC volatile float adc_refcor = 1.0f;
 
 float adc_read_core_temp_float(ADC_HandleTypeDef *adcHandle) {
     int32_t raw_value = adc_config_and_read_ref(adcHandle, ADC_CHANNEL_TEMPSENSOR);
-    float core_temp_avg_slope = (*ADC_CAL2 - *ADC_CAL1) / 80.0;
+    float core_temp_avg_slope = (*ADC_CAL2 - *ADC_CAL1) / 80.0f;
     return (((float)raw_value * adc_refcor - *ADC_CAL1) / core_temp_avg_slope) + 30.0f;
 }
 
diff --git a/ports/stm32/timer.c b/ports/stm32/timer.c
index 9f8b7d1b86..84a47cb6d1 100644
--- a/ports/stm32/timer.c
+++ b/ports/stm32/timer.c
@@ -281,7 +281,7 @@ STATIC uint32_t compute_prescaler_period_from_freq(pyb_timer_obj_t *self, mp_obj
     if (0) {
     #if MICROPY_PY_BUILTINS_FLOAT
     } else if (mp_obj_is_type(freq_in, &mp_type_float)) {
-        float freq = mp_obj_get_float(freq_in);
+        float freq = mp_obj_get_float_to_f(freq_in);
         if (freq <= 0) {
             goto bad_freq;
         }
diff --git a/ports/unix/modffi.c b/ports/unix/modffi.c
index e5bd092cc8..cf77bb3348 100644
--- a/ports/unix/modffi.c
+++ b/ports/unix/modffi.c
@@ -171,7 +171,7 @@ STATIC mp_obj_t return_ffi_value(ffi_arg val, char type) {
         }
         case 'd': {
             double *p = (double *)&val;
-            return mp_obj_new_float(*p);
+            return mp_obj_new_float_from_d(*p);
         }
         #endif
         case 'O':
@@ -378,7 +378,7 @@ STATIC mp_obj_t ffifunc_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const
         #if MICROPY_PY_BUILTINS_FLOAT
         } else if (*argtype == 'f') {
             float *p = (float *)&values[i];
-            *p = mp_obj_get_float(a);
+            *p = mp_obj_get_float_to_f(a);
         } else if (*argtype == 'd') {
             double *p = (double *)&values[i];
             *p = mp_obj_get_float_to_d(a);
@@ -415,7 +415,7 @@ STATIC mp_obj_t ffifunc_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const
     if (sizeof(ffi_arg) == 4 && self->rettype == 'd') {
         double retval;
         ffi_call(&self->cif, self->func, &retval, valueptrs);
-        return mp_obj_new_float(retval);
+        return mp_obj_new_float_from_d(retval);
     } else
     #endif
     {
diff --git a/py/binary.c b/py/binary.c
index 33515e8808..a53b8847cc 100644
--- a/py/binary.c
+++ b/py/binary.c
@@ -178,7 +178,7 @@ mp_obj_t mp_binary_get_val_array(char typecode, void *p, size_t index) {
         case 'f':
             return mp_obj_new_float_from_f(((float *)p)[index]);
         case 'd':
-            return mp_obj_new_float(((double *)p)[index]);
+            return mp_obj_new_float_from_d(((double *)p)[index]);
         #endif
         // Extension to CPython: array of objects
         case 'O':
@@ -249,7 +249,7 @@ mp_obj_t mp_binary_get_val(char struct_type, char val_type, byte *p_base, byte *
         union { uint64_t i;
                 double f;
         } fpu = {val};
-        return mp_obj_new_float(fpu.f);
+        return mp_obj_new_float_from_d(fpu.f);
     #endif
     } else if (is_signed(val_type)) {
         if ((long long)MP_SMALL_INT_MIN <= val && val <= (long long)MP_SMALL_INT_MAX) {
@@ -311,7 +311,7 @@ void mp_binary_set_val(char struct_type, char val_type, mp_obj_t val_in, byte *p
             union { uint32_t i;
                     float f;
             } fp_sp;
-            fp_sp.f = mp_obj_get_float(val_in);
+            fp_sp.f = mp_obj_get_float_to_f(val_in);
             val = fp_sp.i;
             break;
         }
@@ -359,7 +359,7 @@ void mp_binary_set_val_array(char typecode, void *p, size_t index, mp_obj_t val_
     switch (typecode) {
         #if MICROPY_PY_BUILTINS_FLOAT
         case 'f':
-            ((float *)p)[index] = mp_obj_get_float(val_in);
+            ((float *)p)[index] = mp_obj_get_float_to_f(val_in);
             break;
         case 'd':
             ((double *)p)[index] = mp_obj_get_float_to_d(val_in);
diff --git a/py/formatfloat.c b/py/formatfloat.c
index 50fc0da4b4..9d28b2317d 100644
--- a/py/formatfloat.c
+++ b/py/formatfloat.c
@@ -100,15 +100,15 @@ static inline int fp_isless1(float x) {
 
 static const FPTYPE g_pos_pow[] = {
     #if FPDECEXP > 32
-    1e256, 1e128, 1e64,
+    MICROPY_FLOAT_CONST(1e256), MICROPY_FLOAT_CONST(1e128), MICROPY_FLOAT_CONST(1e64),
     #endif
-    1e32, 1e16, 1e8, 1e4, 1e2, 1e1
+    MICROPY_FLOAT_CONST(1e32), MICROPY_FLOAT_CONST(1e16), MICROPY_FLOAT_CONST(1e8), MICROPY_FLOAT_CONST(1e4), MICROPY_FLOAT_CONST(1e2), MICROPY_FLOAT_CONST(1e1)
 };
 static const FPTYPE g_neg_pow[] = {
     #if FPDECEXP > 32
-    1e-256, 1e-128, 1e-64,
+    MICROPY_FLOAT_CONST(1e-256), MICROPY_FLOAT_CONST(1e-128), MICROPY_FLOAT_CONST(1e-64),
     #endif
-    1e-32, 1e-16, 1e-8, 1e-4, 1e-2, 1e-1
+    MICROPY_FLOAT_CONST(1e-32), MICROPY_FLOAT_CONST(1e-16), MICROPY_FLOAT_CONST(1e-8), MICROPY_FLOAT_CONST(1e-4), MICROPY_FLOAT_CONST(1e-2), MICROPY_FLOAT_CONST(1e-1)
 };
 
 int mp_format_float(FPTYPE f, char *buf, size_t buf_size, char fmt, int prec, char sign) {
diff --git a/py/mpprint.c b/py/mpprint.c
index 49653a05bd..c550c1d952 100644
--- a/py/mpprint.c
+++ b/py/mpprint.c
@@ -542,7 +542,7 @@ int mp_vprintf(const mp_print_t *print, const char *fmt, va_list args) {
             case 'g':
             case 'G': {
                 #if ((MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT) || (MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE))
-                mp_float_t f = va_arg(args, double);
+                mp_float_t f = (mp_float_t)va_arg(args, double);
                 chrs += mp_print_float(print, f, *fmt, flags, fill, width, prec);
                 #else
                 #error Unknown MICROPY FLOAT IMPL
diff --git a/tools/mpy-tool.py b/tools/mpy-tool.py
index 0a9246503e..43d35503eb 100755
--- a/tools/mpy-tool.py
+++ b/tools/mpy-tool.py
@@ -332,12 +332,13 @@ class RawCode(object):
                     "#if MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_A || MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_B"
                 )
                 print(
-                    "STATIC const mp_obj_float_t %s = {{&mp_type_float}, %.16g};" % (obj_name, obj)
+                    "STATIC const mp_obj_float_t %s = {{&mp_type_float}, (mp_float_t)%.16g};"
+                    % (obj_name, obj)
                 )
                 print("#endif")
             elif type(obj) is complex:
                 print(
-                    "STATIC const mp_obj_complex_t %s = {{&mp_type_complex}, %.16g, %.16g};"
+                    "STATIC const mp_obj_complex_t %s = {{&mp_type_complex}, (mp_float_t)%.16g, (mp_float_t)%.16g};"
                     % (obj_name, obj.real, obj.imag)
                 )
             else: