RISC-V: Rewrite some instructions using ASM targethook

There are some xtheadvector instructions that differ from RVV1.0
apart from simply adding "th." prefix. For example, RVV1.0
load/store instructions will have SEW while xtheadvector not;
RVV1.0 will have "o" for indexed-ordered store instructions while
xtheadvecotr not; xtheadvector and RVV1.0 have different
vnsrl/vnsra/vfncvt suffix (vv/vx/vi vs wv/wx/wi).

To address this issue without duplicating patterns, we use ASM
targethook to rewrite the whole string of the instructions. We
identify different instructions from the corresponding attribute.

gcc/ChangeLog:

	* config/riscv/thead.cc
	(th_asm_output_opcode): Rewrite some instructions.

Co-authored-by: Jin Ma <jinma@linux.alibaba.com>
Co-authored-by: Xianmiao Qu <cooper.qu@linux.alibaba.com>
Co-authored-by: Christoph Müllner <christoph.muellner@vrull.eu>

diff --git a/gcc/config/riscv/thead.cc b/gcc/config/riscv/thead.cc
index 85250f771672247baa54f534320c1750ec30e333..2955bc5f8a9b926ed23f3dbb9a88c495c7009d92 100644 (file)
--- a/gcc/config/riscv/thead.cc
+++ b/gcc/config/riscv/thead.cc
@@ -908,6 +908,213 @@ th_asm_output_opcode (FILE *asm_out_file, const char *p)
            }
        }
 
+      if (get_attr_type (current_output_insn) == TYPE_VLDE ||
+         get_attr_type (current_output_insn) == TYPE_VSTE ||
+         get_attr_type (current_output_insn) == TYPE_VLDFF)
+       {
+         if (strstr (p, "e8") || strstr (p, "e16") ||
+             strstr (p, "e32") || strstr (p, "e64"))
+           {
+             get_attr_type (current_output_insn) == TYPE_VSTE
+                                 ? fputs ("th.vse", asm_out_file)
+                                 : fputs ("th.vle", asm_out_file);
+             if (strstr (p, "e8"))
+               return p+4;
+             else
+               return p+5;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VLDS ||
+         get_attr_type (current_output_insn) == TYPE_VSTS)
+       {
+         if (strstr (p, "vle8") || strstr (p, "vse8") ||
+             strstr (p, "vle16") || strstr (p, "vse16") ||
+             strstr (p, "vle32") || strstr (p, "vse32") ||
+             strstr (p, "vle64") || strstr (p, "vse64"))
+           {
+             get_attr_type (current_output_insn) == TYPE_VSTS
+                                 ? fputs ("th.vse", asm_out_file)
+                                 : fputs ("th.vle", asm_out_file);
+             if (strstr (p, "e8"))
+               return p+4;
+             else
+               return p+5;
+           }
+         else if (strstr (p, "vlse8") || strstr (p, "vsse8") ||
+                  strstr (p, "vlse16") || strstr (p, "vsse16") ||
+                  strstr (p, "vlse32") || strstr (p, "vsse32") ||
+                  strstr (p, "vlse64") || strstr (p, "vsse64"))
+           {
+             get_attr_type (current_output_insn) == TYPE_VSTS
+                                 ? fputs ("th.vsse", asm_out_file)
+                                 : fputs ("th.vlse", asm_out_file);
+             if (strstr (p, "e8"))
+               return p+5;
+             else
+               return p+6;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VLDUX ||
+         get_attr_type (current_output_insn) == TYPE_VLDOX)
+       {
+         if (strstr (p, "ei"))
+           {
+             fputs ("th.vlxe", asm_out_file);
+             if (strstr (p, "ei8"))
+               return p+7;
+             else
+               return p+8;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VSTUX ||
+         get_attr_type (current_output_insn) == TYPE_VSTOX)
+       {
+         if (strstr (p, "ei"))
+           {
+             get_attr_type (current_output_insn) == TYPE_VSTUX
+                               ? fputs ("th.vsuxe", asm_out_file)
+                               : fputs ("th.vsxe", asm_out_file);
+             if (strstr (p, "ei8"))
+               return p+7;
+             else
+               return p+8;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VLSEGDE ||
+         get_attr_type (current_output_insn) == TYPE_VSSEGTE ||
+         get_attr_type (current_output_insn) == TYPE_VLSEGDFF)
+       {
+         get_attr_type (current_output_insn) == TYPE_VSSEGTE
+                               ? fputs ("th.vsseg", asm_out_file)
+                               : fputs ("th.vlseg", asm_out_file);
+         asm_fprintf (asm_out_file, "%c", p[5]);
+         fputs ("e", asm_out_file);
+         if (strstr (p, "e8"))
+           return p+8;
+         else
+           return p+9;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VLSEGDS ||
+         get_attr_type (current_output_insn) == TYPE_VSSEGTS)
+       {
+         get_attr_type (current_output_insn) == TYPE_VSSEGTS
+                               ? fputs ("th.vssseg", asm_out_file)
+                               : fputs ("th.vlsseg", asm_out_file);
+         asm_fprintf (asm_out_file, "%c", p[6]);
+         fputs ("e", asm_out_file);
+         if (strstr (p, "e8"))
+           return p+9;
+         else
+           return p+10;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VLSEGDUX ||
+         get_attr_type (current_output_insn) == TYPE_VLSEGDOX)
+       {
+         fputs ("th.vlxseg", asm_out_file);
+         asm_fprintf (asm_out_file, "%c", p[7]);
+         fputs ("e", asm_out_file);
+         if (strstr (p, "ei8"))
+           return p+11;
+         else
+           return p+12;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VSSEGTUX ||
+         get_attr_type (current_output_insn) == TYPE_VSSEGTOX)
+       {
+         fputs ("th.vsxseg", asm_out_file);
+         asm_fprintf (asm_out_file, "%c", p[7]);
+         fputs ("e", asm_out_file);
+         if (strstr (p, "ei8"))
+           return p+11;
+         else
+           return p+12;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VNSHIFT)
+       {
+         if (strstr (p, "vncvt"))
+           {
+             fputs ("th.vncvt.x.x.v", asm_out_file);
+             return p+11;
+           }
+
+         strstr (p, "vnsrl") ? fputs ("th.vnsrl.v", asm_out_file)
+                             : fputs ("th.vnsra.v", asm_out_file);
+         return p+7;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VNCLIP)
+       {
+         if (strstr (p, "vnclipu"))
+           {
+             fputs ("th.vnclipu.v", asm_out_file);
+             return p+9;
+           }
+         else
+           {
+             fputs ("th.vnclip.v", asm_out_file);
+             return p+8;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VMPOP)
+       {
+         fputs ("th.vmpopc", asm_out_file);
+         return p+5;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VMFFS)
+       {
+         fputs ("th.vmfirst", asm_out_file);
+         return p+6;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VFNCVTFTOI ||
+         get_attr_type (current_output_insn) == TYPE_VFNCVTITOF)
+       {
+         if (strstr (p, "xu"))
+           {
+             get_attr_type (current_output_insn) == TYPE_VFNCVTFTOI
+                          ? fputs ("th.vfncvt.xu.f.v", asm_out_file)
+                          : fputs ("th.vfncvt.f.xu.v", asm_out_file);
+             return p+13;
+       }
+         else
+           {
+             get_attr_type (current_output_insn) == TYPE_VFNCVTFTOI
+                          ? fputs ("th.vfncvt.x.f.v", asm_out_file)
+                          : fputs ("th.vfncvt.f.x.v", asm_out_file);
+             return p+12;
+           }
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VFNCVTFTOF)
+       {
+         fputs ("th.vfncvt.f.f.v", asm_out_file);
+         return p+12;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VFREDU
+         && strstr (p, "sum"))
+       {
+         fputs ("th.vfredsum", asm_out_file);
+         return p+9;
+       }
+
+      if (get_attr_type (current_output_insn) == TYPE_VFWREDU
+         && strstr (p, "sum"))
+       {
+         fputs ("th.vfwredsum", asm_out_file);
+         return p+10;
+       }
+
       if (p[0] == 'v')
        fputs ("th.", asm_out_file);
     }