type: Rename matrix_3x3_t to mat33_fp_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: I51d88d44252184e4b7b3564236833b0b892edc39
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1215449
Commit-Ready: Yilun Lin <yllin@chromium.org>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/common/math_util.c b/common/math_util.c
index 4cdddb1eab..d0b5887199 100644
--- a/common/math_util.c
+++ b/common/math_util.c
@@ -176,7 +176,7 @@ fp_t cosine_of_angle_diff(const intv3_t v1, const intv3_t v2)
  * rotate a vector v
  *  - support input v and output res are the same vector
  */
-void rotate(const intv3_t v, const matrix_3x3_t R, intv3_t res)
+void rotate(const intv3_t v, const mat33_fp_t R, intv3_t res)
 {
 	fp_inter_t t[3];
 
@@ -204,7 +204,7 @@ void rotate(const intv3_t v, const matrix_3x3_t R, intv3_t res)
 	res[2] = FP_TO_INT(t[2]);
 }
 
-void rotate_inv(const intv3_t v, const matrix_3x3_t R, intv3_t res)
+void rotate_inv(const intv3_t v, const mat33_fp_t R, intv3_t res)
 {
 	fp_inter_t t[3];
 	fp_t deter;