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authorRoland Scheidegger <[email protected]>2017-11-09 19:50:41 +0100
committerRoland Scheidegger <[email protected]>2017-11-15 03:13:46 +0100
commit570d5b79929554a45d8aebd294bbd67969396ba5 (patch)
treecfa929472f9dc37be1fd8f029138a68adac631c4 /src/gallium/drivers/r600/r600_shader.c
parent1c8d57a008861f856a7fad8feaf14ec412a29d3e (diff)
r600: use ieee version of rsq
Both r600 and evergreen used the clamped version, whereas cayman used the ieee one. I don't think there's a valid reason for this discrepancy, so let's switch to the ieee version for r600 and evergreen too, since we generally want to stick to ieee arithmetic. With this, behavior for both rcp and rsq should now be the same for all of r600, eg, cm, all using ieee versions (albeit note rsq retains the abs behavior for everybody, which may not be a good idea ultimately). Reviewed-by: Dave Airlie <[email protected]>
Diffstat (limited to 'src/gallium/drivers/r600/r600_shader.c')
-rw-r--r--src/gallium/drivers/r600/r600_shader.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 547eebac122..b1a164e594d 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -4865,11 +4865,7 @@ static int tgsi_rsq(struct r600_shader_ctx *ctx)
memset(&alu, 0, sizeof(struct r600_bytecode_alu));
- /* XXX:
- * For state trackers other than OpenGL, we'll want to use
- * _RECIPSQRT_IEEE instead.
- */
- alu.op = ALU_OP1_RECIPSQRT_CLAMPED;
+ alu.op = ALU_OP1_RECIPSQRT_IEEE;
for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
r600_bytecode_src(&alu.src[i], &ctx->src[i], 0);