diff --git a/.github/workflows/cmake-wasm.yml b/.github/workflows/cmake-wasm.yml
index 63567ac..66039b2 100644
--- a/.github/workflows/cmake-wasm.yml
+++ b/.github/workflows/cmake-wasm.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Downloading wasi-sdk
       run: |
@@ -64,7 +64,7 @@ jobs:
         C_FLAGS: ['', '-msimd128', '-msse -msse2 -msimd128', '-msse -msse2 -msse3 -msse4 -msimd128']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Setup emsdk
       uses: mymindstorm/setup-emsdk@v12
 
diff --git a/.github/workflows/meson-wasm.yml b/.github/workflows/meson-wasm.yml
index dac2c67..bd913a2 100644
--- a/.github/workflows/meson-wasm.yml
+++ b/.github/workflows/meson-wasm.yml
@@ -18,7 +18,7 @@ jobs:
         C_FLAGS: ['', '-msimd128', '-msse -msse2 -msimd128', '-msse -msse2 -msse3 -msse4 -msimd128']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Setup emsdk
       uses: mymindstorm/setup-emsdk@v13
 
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 0000000..cf6b4b3
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,39 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+    # You can also specify other tool versions:
+    # nodejs: "20"
+    # rust: "1.70"
+    # golang: "1.20"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/source/conf.py
+  # You can configure Sphinx to use a different builder, for instance use the dirhtml builder for simpler URLs
+  # builder: "dirhtml"
+  # Fail on all warnings to avoid broken references
+  # fail_on_warning: true
+
+# Optionally build your docs in additional formats such as PDF and ePub
+# formats:
+#   - pdf
+#   - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+# python:
+#   install:
+#     - requirements: docs/requirements.txt
+
+python:
+  install:
+    - requirements: docs/requirements.txt
\ No newline at end of file
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..1ee13a2
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,4 @@
+# Defining the exact version will make sure things don't break
+sphinx==5.3.0
+sphinx_rtd_theme==1.1.1
+readthedocs-sphinx-search==0.1.1
\ No newline at end of file
diff --git a/include/cglm/simd/arm.h b/include/cglm/simd/arm.h
index 1adc735..e8507d7 100644
--- a/include/cglm/simd/arm.h
+++ b/include/cglm/simd/arm.h
@@ -174,7 +174,7 @@ glmm_fnmadd(float32x4_t a, float32x4_t b, float32x4_t c) {
 static inline
 float32x4_t
 glmm_fmsub(float32x4_t a, float32x4_t b, float32x4_t c) {
-  return glmm_fmadd(vnegq_f32(c), a, b);
+  return glmm_fmadd(a, b, vnegq_f32(c));
 }
 
 static inline
diff --git a/test/tests.h b/test/tests.h
index 48d135e..37f8abb 100644
--- a/test/tests.h
+++ b/test/tests.h
@@ -532,6 +532,12 @@ TEST_DECLARE(glmc_vec2_muladd)
 TEST_DECLARE(glmc_vec2_muladds)
 TEST_DECLARE(glmc_vec2_maxadd)
 TEST_DECLARE(glmc_vec2_minadd)
+TEST_DECLARE(glmc_vec2_subsub)
+TEST_DECLARE(glmc_vec2_addsub)
+TEST_DECLARE(glmc_vec2_mulsub)
+TEST_DECLARE(glmc_vec2_mulsubs)
+TEST_DECLARE(glmc_vec2_maxsub)
+TEST_DECLARE(glmc_vec2_minsub)
 TEST_DECLARE(glmc_vec2_negate_to)
 TEST_DECLARE(glmc_vec2_negate)
 TEST_DECLARE(glmc_vec2_normalize)
@@ -675,6 +681,12 @@ TEST_DECLARE(glmc_vec3_muladd)
 TEST_DECLARE(glmc_vec3_muladds)
 TEST_DECLARE(glmc_vec3_maxadd)
 TEST_DECLARE(glmc_vec3_minadd)
+TEST_DECLARE(glmc_vec3_subsub)
+TEST_DECLARE(glmc_vec3_addsub)
+TEST_DECLARE(glmc_vec3_mulsub)
+TEST_DECLARE(glmc_vec3_mulsubs)
+TEST_DECLARE(glmc_vec3_maxsub)
+TEST_DECLARE(glmc_vec3_minsub)
 TEST_DECLARE(glmc_vec3_negate_to)
 TEST_DECLARE(glmc_vec3_negate)
 TEST_DECLARE(glmc_vec3_normalize)
@@ -835,6 +847,12 @@ TEST_DECLARE(glmc_vec4_muladd)
 TEST_DECLARE(glmc_vec4_muladds)
 TEST_DECLARE(glmc_vec4_maxadd)
 TEST_DECLARE(glmc_vec4_minadd)
+TEST_DECLARE(glmc_vec4_subsub)
+TEST_DECLARE(glmc_vec4_addsub)
+TEST_DECLARE(glmc_vec4_mulsub)
+TEST_DECLARE(glmc_vec4_mulsubs)
+TEST_DECLARE(glmc_vec4_maxsub)
+TEST_DECLARE(glmc_vec4_minsub)
 TEST_DECLARE(glmc_vec4_negate_to)
 TEST_DECLARE(glmc_vec4_negate)
 TEST_DECLARE(glmc_vec4_normalize)
@@ -1532,6 +1550,12 @@ TEST_LIST {
   TEST_ENTRY(glmc_vec2_muladds)
   TEST_ENTRY(glmc_vec2_maxadd)
   TEST_ENTRY(glmc_vec2_minadd)
+  TEST_ENTRY(glmc_vec2_subsub)
+  TEST_ENTRY(glmc_vec2_addsub)
+  TEST_ENTRY(glmc_vec2_mulsub)
+  TEST_ENTRY(glmc_vec2_mulsubs)
+  TEST_ENTRY(glmc_vec2_maxsub)
+  TEST_ENTRY(glmc_vec2_minsub)
   TEST_ENTRY(glmc_vec2_negate_to)
   TEST_ENTRY(glmc_vec2_negate)
   TEST_ENTRY(glmc_vec2_normalize)
@@ -1674,6 +1698,12 @@ TEST_LIST {
   TEST_ENTRY(glmc_vec3_muladds)
   TEST_ENTRY(glmc_vec3_maxadd)
   TEST_ENTRY(glmc_vec3_minadd)
+  TEST_ENTRY(glmc_vec3_subsub)
+  TEST_ENTRY(glmc_vec3_addsub)
+  TEST_ENTRY(glmc_vec3_mulsub)
+  TEST_ENTRY(glmc_vec3_mulsubs)
+  TEST_ENTRY(glmc_vec3_maxsub)
+  TEST_ENTRY(glmc_vec3_minsub)
   TEST_ENTRY(glmc_vec3_negate_to)
   TEST_ENTRY(glmc_vec3_negate)
   TEST_ENTRY(glmc_vec3_normalize)
@@ -1834,6 +1864,12 @@ TEST_LIST {
   TEST_ENTRY(glmc_vec4_muladds)
   TEST_ENTRY(glmc_vec4_maxadd)
   TEST_ENTRY(glmc_vec4_minadd)
+  TEST_ENTRY(glmc_vec4_subsub)
+  TEST_ENTRY(glmc_vec4_addsub)
+  TEST_ENTRY(glmc_vec4_mulsub)
+  TEST_ENTRY(glmc_vec4_mulsubs)
+  TEST_ENTRY(glmc_vec4_maxsub)
+  TEST_ENTRY(glmc_vec4_minsub)
   TEST_ENTRY(glmc_vec4_negate_to)
   TEST_ENTRY(glmc_vec4_negate)
   TEST_ENTRY(glmc_vec4_normalize)