From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Fri, 24 Oct 2014 18:41:25 +0000 (-0700)
Subject: i965/fs: Use correct spill offsets
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9d1f72ebdec90e2c747d5af38d72895a60a1753a;p=mesa.git

i965/fs: Use correct spill offsets

Different platforms require the offset to be in different units.  However,
the generator fixes all of this up for us and only requires an offset in
bytes.  Previously, we were getting this wrong all over the place.  Some
computed/used it correctly as bytes while others treated the offset as
whole registers or computed it as bytes or bytes*2 in SIMD16 mode.  This
commit cleans all this up and makes us properly treat it as bytes
everywhere.

Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
index ee5e1230943..c0171372887 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
@@ -714,7 +714,7 @@ fs_visitor::emit_unspill(bblock_t *block, fs_inst *inst, fs_reg dst,
       inst->insert_before(block, unspill_inst);
 
       dst.reg_offset += reg_size;
-      spill_offset += reg_size * 8 * sizeof(float);
+      spill_offset += reg_size * REG_SIZE;
    }
 }
 
@@ -734,7 +734,7 @@ fs_visitor::emit_spill(bblock_t *block, fs_inst *inst, fs_reg src,
          new(mem_ctx) fs_inst(SHADER_OPCODE_GEN4_SCRATCH_WRITE,
                               reg_null_f, src);
       src.reg_offset += reg_size;
-      spill_inst->offset = spill_offset + i * reg_size;
+      spill_inst->offset = spill_offset + i * reg_size * REG_SIZE;
       spill_inst->ir = inst->ir;
       spill_inst->annotation = inst->annotation;
       spill_inst->mlen = 1 + reg_size; /* header, value */
@@ -822,7 +822,6 @@ fs_visitor::choose_spill_reg(struct ra_graph *g)
 void
 fs_visitor::spill_reg(int spill_reg)
 {
-   int reg_size = dispatch_width * sizeof(float);
    int size = virtual_grf_sizes[spill_reg];
    unsigned int spill_offset = last_scratch;
    assert(ALIGN(spill_offset, 16) == spill_offset); /* oword read/write req. */
@@ -849,7 +848,7 @@ fs_visitor::spill_reg(int spill_reg)
       spilled_any_registers = true;
    }
 
-   last_scratch += size * reg_size;
+   last_scratch += size * REG_SIZE;
 
    /* Generate spill/unspill instructions for the objects being
     * spilled.  Right now, we spill or unspill the whole thing to a
@@ -862,7 +861,7 @@ fs_visitor::spill_reg(int spill_reg)
 	     inst->src[i].reg == spill_reg) {
             int regs_read = inst->regs_read(this, i);
             int subset_spill_offset = (spill_offset +
-                                       reg_size * inst->src[i].reg_offset);
+                                       REG_SIZE * inst->src[i].reg_offset);
             fs_reg unspill_dst(GRF, virtual_grf_alloc(regs_read));
 
             inst->src[i].reg = unspill_dst.reg;
@@ -876,7 +875,7 @@ fs_visitor::spill_reg(int spill_reg)
       if (inst->dst.file == GRF &&
 	  inst->dst.reg == spill_reg) {
          int subset_spill_offset = (spill_offset +
-                                    reg_size * inst->dst.reg_offset);
+                                    REG_SIZE * inst->dst.reg_offset);
          fs_reg spill_src(GRF, virtual_grf_alloc(inst->regs_written));
 
          inst->dst.reg = spill_src.reg;