From: Brian <brian.paul@tungstengraphics.com>
Date: Wed, 22 Aug 2007 15:41:20 +0000 (-0600)
Subject: implement negation for src operands
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2154d1c5ac0bb37614ef00bed766e49635b519e8;p=mesa.git

implement negation for src operands
---

diff --git a/src/mesa/pipe/i915simple/i915_fpc_translate.c b/src/mesa/pipe/i915simple/i915_fpc_translate.c
index cf6a142075e..6583cbfa280 100644
--- a/src/mesa/pipe/i915simple/i915_fpc_translate.c
+++ b/src/mesa/pipe/i915simple/i915_fpc_translate.c
@@ -178,11 +178,24 @@ src_vector(struct i915_fp_compile *p,
                  source->SrcRegister.SwizzleZ,
                  source->SrcRegister.SwizzleW);
 
-   assert(!source->SrcRegister.Negate);
-   assert(!source->SrcRegisterExtSwz.NegateX);
-   assert(!source->SrcRegisterExtSwz.NegateY);
-   assert(!source->SrcRegisterExtSwz.NegateZ);
-   assert(!source->SrcRegisterExtSwz.NegateW);
+   /* There's both negate-all-components and per-component negation.
+    * Try to handle both here.
+    */
+   {
+      int nx = source->SrcRegisterExtSwz.NegateX;
+      int ny = source->SrcRegisterExtSwz.NegateY;
+      int nz = source->SrcRegisterExtSwz.NegateZ;
+      int nw = source->SrcRegisterExtSwz.NegateW;
+      if (source->SrcRegister.Negate) {
+         nx = !nx;
+         ny = !ny;
+         nz = !nz;
+         nw = !nw;
+      }
+      src = negate(src, nx, ny, nz, nw);
+   }
+
+   /* no abs() or post-abs negation */
    assert(!source->SrcRegisterExtMod.Absolute);
    assert(!source->SrcRegisterExtMod.Negate);