mesa: remove INV_SQRTF() macro

Reviewed-by: Roland Scheidegger <[email protected]>
Reviewed-by: Matt Turner <[email protected]>

3 files changed, 3 insertions, 12 deletions

diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index da373b04430..df6a3fe994a 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -119,15 +119,6 @@ static inline int isblank(int ch) { return ch == ' ' || ch == '\t'; }
 #endif
 
 
-/** single-precision inverse square root */
-static inline float
-INV_SQRTF(float x)
-{
-   /* XXX we could try Quake's fast inverse square root function here */
-   return 1.0F / sqrtf(x);
-}
-
-
 /***
  *** LOG2: Log base 2 of float
  ***/
diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c
index 9db0bff49a7..c4d3a532ef5 100644
--- a/src/mesa/main/light.c
+++ b/src/mesa/main/light.c
@@ -1026,9 +1026,9 @@ update_modelview_scale( struct gl_context *ctx )
       GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
       if (f < 1e-12) f = 1.0;
       if (ctx->_NeedEyeCoords)
-	 ctx->_ModelViewInvScale = (GLfloat) INV_SQRTF(f);
+	 ctx->_ModelViewInvScale = 1.0f / sqrtf(f);
       else
-	 ctx->_ModelViewInvScale = (GLfloat) sqrtf(f);
+	 ctx->_ModelViewInvScale = sqrtf(f);
    }
 }
 
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h
index 11e3b2a62d4..470d3966e82 100644
--- a/src/mesa/main/macros.h
+++ b/src/mesa/main/macros.h
@@ -775,7 +775,7 @@ NORMALIZE_3FV(GLfloat v[3])
 {
    GLfloat len = (GLfloat) LEN_SQUARED_3FV(v);
    if (len) {
-      len = INV_SQRTF(len);
+      len = 1.0f / sqrtf(len);
       v[0] *= len;
       v[1] *= len;
       v[2] *= len;