Mesa (gallium-0.2): gallium: added ppc_vload_float(), for limited cases

[Brian Paul]

Module: Mesa
Branch: gallium-0.2
Commit: b06d0720194dfecaf45dc97cbd178411aed5205f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b06d0720194dfecaf45dc97cbd178411aed5205f

Author: Brian Paul <brian.paul at tungstengraphics.com>
Date:   Wed Oct 22 14:48:33 2008 -0600

gallium: added ppc_vload_float(), for limited cases

---

 src/gallium/auxiliary/rtasm/rtasm_ppc.c |   18 ++++++++++++++++++
 src/gallium/auxiliary/rtasm/rtasm_ppc.h |    4 ++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc.c b/src/gallium/auxiliary/rtasm/rtasm_ppc.c
index 2d9f4e0..65df676 100644
--- a/src/gallium/auxiliary/rtasm/rtasm_ppc.c
+++ b/src/gallium/auxiliary/rtasm/rtasm_ppc.c
@@ -603,6 +603,24 @@ ppc_lvewx(struct ppc_function *p, uint vr, uint ra, uint rb)
    emit_x(p, 31, vr, ra, rb, 71);
 }
 
+/** vector load float: vr = splats(imm) */
+void
+ppc_vload_float(struct ppc_function *p, uint vr, float imm)
+{
+   if (imm == 0.0f) {
+      ppc_vxor(p, vr, vr, vr);
+   }
+   else if (imm == 1.0f) {
+      /* use 2^0=1 to get 1.0 */
+      ppc_vxor(p, vr, vr, vr);  /* vr = {0,0,0,0} */
+      ppc_vexptefp(p, vr, vr);  /* vr = 0^0 */
+   }
+   else {
+      assert(0);
+   }
+}
+
+
 
 
 /**
diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc.h b/src/gallium/auxiliary/rtasm/rtasm_ppc.h
index 85679b4..9f1e3fc 100644
--- a/src/gallium/auxiliary/rtasm/rtasm_ppc.h
+++ b/src/gallium/auxiliary/rtasm/rtasm_ppc.h
@@ -158,6 +158,10 @@ ppc_lvx(struct ppc_function *p, uint vR, uint vA, uint vB);
 extern void
 ppc_lvewx(struct ppc_function *p, uint vR, uint vA, uint vB);
 
+/** vector load float: vr = splats(imm) */
+extern void
+ppc_vload_float(struct ppc_function *p, uint vr, float imm);
+
 
 
 /**