type: Rename vec3_t to floatv3_t.

Naming of many vector types and matrix types are not clear enough.
For example, we have:
  vector_3_t, which is a vector of three int.
  vec3_t, which is a vector of three float.
  size4_t, which is a vector of four size_t.
  mat33_t, which is a 3x3 matrix of float.
  matrix_3x3_t, which is a 3x3 matrix of fixed point.
Besides, we have types like int8_t, uint16_t types.

To clearly distinguished types, the CL propose to,

For vector types, naming should be `$type + 'v' + $num + '_t'`:
  vector_3_t becomes intv3_t
  vec3_t becomes floatv3_t
  vector 4 of uint16_t becomes uint16v4_t (which doesn't exist yet)

For matrix types, naming should be `mat$N$N_` + $type + '_t', where $N is the
matrix size:
  matrix_3x3_t becomes mat33_fp_t  # fp: fixed point
  mat33_t becomes mat33_float_t

TEST=make buildall -j
BUG=b:114662791

Change-Id: I8cac6a7c0abe3d462326291b76b1ed44ce6c9a9c
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1215443
Commit-Ready: Yilun Lin <yllin@chromium.org>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

2 files changed, 6 insertions, 6 deletions

diff --git a/include/mat33.h b/include/mat33.h
index de7debbbc1..75c0d79366 100644
--- a/include/mat33.h
+++ b/include/mat33.h
@@ -20,7 +20,7 @@ void mat33_scalar_mul(mat33_t A, float c);
 
 void mat33_swap_rows(mat33_t A, const size_t i, const size_t j);
 
-void mat33_get_eigenbasis(mat33_t S, vec3_t eigenvals, mat33_t eigenvecs);
+void mat33_get_eigenbasis(mat33_t S, floatv3_t eigenvals, mat33_t eigenvecs);
 
 size_t mat33_maxind(mat33_t A, size_t k);
 
diff --git a/include/vec3.h b/include/vec3.h
index 68ec1a5c72..367956b2a1 100644
--- a/include/vec3.h
+++ b/include/vec3.h
@@ -7,11 +7,11 @@
 #ifndef __CROS_EC_VEC_3_H
 #define __CROS_EC_VEC_3_H
 
-typedef float vec3_t[3];
+typedef float floatv3_t[3];
 
-void vec3_scalar_mul(vec3_t v, float c);
-float vec3_dot(const vec3_t v, const vec3_t w);
-float vec3_norm_squared(const vec3_t v);
-float vec3_norm(const vec3_t v);
+void floatv3_scalar_mul(floatv3_t v, float c);
+float floatv3_dot(const floatv3_t v, const floatv3_t w);
+float floatv3_norm_squared(const floatv3_t v);
+float floatv3_norm(const floatv3_t v);
 
 #endif  /* __CROS_EC_VEC_3_H */