[llvm] r195035 - R600/SI: Specify S_ADD/S_SUB set SCC and add is commutable

[Rafael Espíndola]

None of these changes are testable?

On 18 November 2013 15:09, Matt Arsenault <Matthew.Arsenault at amd.com> wrote:
> Author: arsenm
> Date: Mon Nov 18 14:09:32 2013
> New Revision: 195035
>
> URL: http://llvm.org/viewvc/llvm-project?rev=195035&view=rev
> Log:
> R600/SI: Specify S_ADD/S_SUB set SCC and add is commutable
>
> Modified:
>     llvm/trunk/lib/Target/R600/SIInstructions.td
>
> Modified: llvm/trunk/lib/Target/R600/SIInstructions.td
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIInstructions.td?rev=195035&r1=195034&r2=195035&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Target/R600/SIInstructions.td (original)
> +++ llvm/trunk/lib/Target/R600/SIInstructions.td Mon Nov 18 14:09:32 2013
> @@ -1126,17 +1126,29 @@ def V_DIV_FMAS_F64 : VOP3_64 <0x00000170
>  //def V_QSAD_U8 : VOP3_U8 <0x00000172, "V_QSAD_U8", []>;
>  //def V_MQSAD_U8 : VOP3_U8 <0x00000173, "V_MQSAD_U8", []>;
>  def V_TRIG_PREOP_F64 : VOP3_64 <0x00000174, "V_TRIG_PREOP_F64", []>;
> +
> +let Defs = [SCC] in { // Carry out goes to SCC
> +let isCommutable = 1 in {
>  def S_ADD_U32 : SOP2_32 <0x00000000, "S_ADD_U32", []>;
> -def S_SUB_U32 : SOP2_32 <0x00000001, "S_SUB_U32", []>;
>  def S_ADD_I32 : SOP2_32 <0x00000002, "S_ADD_I32",
>    [(set i32:$dst, (add i32:$src0, i32:$src1))]
>  >;
> +} // End isCommutable = 1
> +
> +def S_SUB_U32 : SOP2_32 <0x00000001, "S_SUB_U32", []>;
>  def S_SUB_I32 : SOP2_32 <0x00000003, "S_SUB_I32",
>    [(set i32:$dst, (sub i32:$src0, i32:$src1))]
>  >;
>
> +let Uses = [SCC] in { // Carry in comes from SCC
> +let isCommutable = 1 in {
>  def S_ADDC_U32 : SOP2_32 <0x00000004, "S_ADDC_U32", []>;
> +} // End isCommutable = 1
> +
>  def S_SUBB_U32 : SOP2_32 <0x00000005, "S_SUBB_U32", []>;
> +} // End Uses = [SCC]
> +} // End Defs = [SCC]
> +
>  def S_MIN_I32 : SOP2_32 <0x00000006, "S_MIN_I32", []>;
>  def S_MIN_U32 : SOP2_32 <0x00000007, "S_MIN_U32", []>;
>  def S_MAX_I32 : SOP2_32 <0x00000008, "S_MAX_I32", []>;
>
>
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