i965: comments, whitespace changes

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 4372ed3d9a102f42cbcb7d2a7ba0cf858f52935a..d65b1332c61f3bc79dc53ed496341cb29d7aec99 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -1024,8 +1024,8 @@ static void emit_fb_write( struct brw_wm_compile *c,
 }
 
 
-/* Post-fragment-program processing.  Send the results to the
- * framebuffer.
+/**
+ * Move a GPR to scratch memory. 
  */
 static void emit_spill( struct brw_wm_compile *c,
                        struct brw_reg reg,
@@ -1049,6 +1049,9 @@ static void emit_spill( struct brw_wm_compile *c,
 }
 
 
+/**
+ * Load a GPR from scratch memory. 
+ */
 static void emit_unspill( struct brw_wm_compile *c,
                          struct brw_reg reg,
                          GLuint slot )
@@ -1069,13 +1072,14 @@ static void emit_unspill( struct brw_wm_compile *c,
 
    brw_dp_READ_16(p,
                  retype(vec16(reg), BRW_REGISTER_TYPE_UW),
-                 1, 
+                 1,
                  slot);
 }
 
 
 /**
- * Retrieve upto 4 GEN4 register pairs for the given wm reg:
+ * Retrieve up to 4 GEN4 register pairs for the given wm reg:
+ * Args with unspill_reg != 0 will be loaded from scratch memory.
  */
 static void get_argument_regs( struct brw_wm_compile *c,
                               struct brw_wm_ref *arg[],
@@ -1085,13 +1089,12 @@ static void get_argument_regs( struct brw_wm_compile *c,
 
    for (i = 0; i < 4; i++) {
       if (arg[i]) {
-
-        if (arg[i]->unspill_reg) 
-           emit_unspill(c, 
+        if (arg[i]->unspill_reg)
+           emit_unspill(c,
                         brw_vec8_grf(arg[i]->unspill_reg, 0),
                         arg[i]->value->spill_slot);
 
-        regs[i] = arg[i]->hw_reg;       
+        regs[i] = arg[i]->hw_reg;
       }
       else {
         regs[i] = brw_null_reg();
@@ -1100,6 +1103,9 @@ static void get_argument_regs( struct brw_wm_compile *c,
 }
 
 
+/**
+ * For values that have a spill_slot!=0, write those regs to scratch memory.
+ */
 static void spill_values( struct brw_wm_compile *c,
                          struct brw_wm_value *values,
                          GLuint nr )