From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 12 Jun 2008 22:01:43 +0000 (-0600)
Subject: gallium: disable the codegen for TGSI_OPCODE_EXPBASE2 for now.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=20ee00754d432cf6c9aca2ba61e004a83795e160;p=mesa.git

gallium: disable the codegen for TGSI_OPCODE_EXPBASE2 for now.

The x86 code seems to fail for exponents of 4 or larger.
See glean's vertProg1/EX2 test.
---

diff --git a/src/gallium/auxiliary/draw/draw_vs_aos.c b/src/gallium/auxiliary/draw/draw_vs_aos.c
index 388dd3fbee0..1f926b3e850 100644
--- a/src/gallium/auxiliary/draw/draw_vs_aos.c
+++ b/src/gallium/auxiliary/draw/draw_vs_aos.c
@@ -1662,7 +1662,14 @@ emit_instruction( struct aos_compilation *cp,
       return emit_RND(cp, inst);
 
    case TGSI_OPCODE_EXPBASE2:
+#if 0
+      /* this seems to fail for "larger" exponents.
+       * See glean tvertProg1's EX2 test.
+       */
       return emit_EX2(cp, inst);
+#else
+      return FALSE;
+#endif
 
    case TGSI_OPCODE_LOGBASE2:
       return emit_LG2(cp, inst);