From: Jonathan White <jwhite@tungstengraphics.com>
Date: Thu, 18 Sep 2008 20:49:00 +0000 (-0600)
Subject: cell: Added CMP instruction
X-Git-Tag: 062012170305~17580^2~496^2~682
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=698bffb8844f6f45e09ed0c9fea39298ac6423d2;p=profile%2Fivi%2Fmesa.git

cell: Added CMP instruction
---

diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fp.c b/src/gallium/drivers/cell/ppu/cell_gen_fp.c
index 4f01897..6f2b89c 100644
--- a/src/gallium/drivers/cell/ppu/cell_gen_fp.c
+++ b/src/gallium/drivers/cell/ppu/cell_gen_fp.c
@@ -835,15 +835,15 @@ emit_CMP(struct codegen *gen, const struct tgsi_full_instruction *inst)
       if (inst->FullDstRegisters[0].DstRegister.WriteMask & (1 << ch)) {
          int s1_reg = get_src_reg(gen, ch, &inst->FullSrcRegisters[0]);
          int s2_reg = get_src_reg(gen, ch, &inst->FullSrcRegisters[1]);
+         int s3_reg = get_src_reg(gen, ch, &inst->FullSrcRegisters[2]);
          int d_reg = get_dst_reg(gen, ch, &inst->FullDstRegisters[0]);
+         int zero_reg = get_itemp(gen);
+   
+         spe_xor(gen->f, zero_reg, zero_reg, zero_reg);
 
-         /* d = (s1 != s2) */
-         spe_fceq(gen->f, d_reg, s1_reg, s2_reg);
-         spe_nor(gen->f, d_reg, d_reg, d_reg);
-
-         /* convert d from 0x0/0xffffffff to 0.0/1.0 */
-         /* d = d & one_reg */
-         spe_and(gen->f, d_reg, d_reg, get_const_one_reg(gen));
+         /* d = (s1 < 0) ? s2 : s3 */
+         spe_fcgt(gen->f, d_reg, zero_reg, s1_reg);
+         spe_selb(gen->f, d_reg, s3_reg, s2_reg, d_reg);
 
          store_dest_reg(gen, d_reg, ch, &inst->FullDstRegisters[0]);
          free_itemps(gen);