From 9e8d87c255713f7bf397083be9e6453d312c93a3 Mon Sep 17 00:00:00 2001

From: Nicolas Ojeda Bar <n.oje.bar@gmail.com>

Date: Wed, 23 Nov 2016 12:38:28 +0100

Subject: [PATCH 11/12] Another immediate range fix

---

 asmcomp/riscv/emit.mlp | 57 ++++++++++++++++++++++++++++++--------------------

 1 file changed, 34 insertions(+), 23 deletions(-)

diff --git a/asmcomp/riscv/emit.mlp b/asmcomp/riscv/emit.mlp

index 97c49ce80..6cc190864 100644

--- a/asmcomp/riscv/emit.mlp

+++ b/asmcomp/riscv/emit.mlp

@@ -85,14 +85,6 @@ let emit_reg = function

   | {loc = Reg r} -> emit_string (register_name r)

   | _ -> fatal_error "Emit.emit_reg"

-(* Output a stack reference *)

-

-let emit_stack r =

-  match r.loc with

-    Stack s ->

-      let ofs = slot_offset s (register_class r) in `{emit_int ofs}(sp)`

-  | _ -> fatal_error "Emit.emit_stack"

-

 (* Adjust sp by the given byte amount *)

 let emit_stack_adjustment = function

@@ -103,7 +95,27 @@ let emit_stack_adjustment = function

       `	li	{emit_reg reg_tmp1}, {emit_int n}\n`;

       `	add	sp, sp, {emit_reg reg_tmp1}\n`

-let emit_store src ofs =

+let reload_ra n =

+  let ofs = n - size_addr in

+  if is_immediate ofs then

+    `	{emit_string lg}	ra, {emit_int ofs}(sp)\n`

+  else begin

+    `	li	{emit_reg reg_tmp1}, {emit_int ofs}\n`;

+    `	add	{emit_reg reg_tmp1}, sp, {emit_reg reg_tmp1}\n`;

+    `	{emit_string lg}	ra, 0({emit_reg reg_tmp1})\n`

+  end

+

+let store_ra n =

+  let ofs = n - size_addr in

+  if is_immediate ofs then

+    `	{emit_string stg}	ra, {emit_int(n - size_addr)}(sp)\n`

+  else begin

+    `	li	{emit_reg reg_tmp1}, {emit_int ofs}\n`;

+    `	add	{emit_reg reg_tmp1}, sp, {emit_reg reg_tmp1}\n`;

+    `	{emit_string stg}	ra, 0({emit_reg reg_tmp1})\n`

+  end

+

+let emit_store stg src ofs =

   if is_immediate ofs then

     `	{emit_string stg}	{emit_reg src}, {emit_int ofs}(sp)\n`

   else begin

@@ -112,7 +124,7 @@ let emit_store src ofs =

     `	{emit_string stg}	{emit_reg src}, 0({emit_reg reg_tmp1})\n`

   end

-let emit_load dst ofs =

+let emit_load lg dst ofs =

   if is_immediate ofs then

     `	{emit_string lg}	{emit_reg dst}, {emit_int ofs}(sp)\n`

   else begin

@@ -265,14 +277,16 @@ let emit_instr i =

             `	fmv.d   {emit_reg dst}, {emit_reg src}\n`

         | {loc = Reg _; typ = (Val | Int | Addr)}, {loc = Stack s} ->

             let ofs = slot_offset s (register_class dst) in

-            emit_store src ofs

-        | {loc = Reg _; typ = Float}, {loc = Stack _} ->

-            `	fsd	{emit_reg src}, {emit_stack dst}\n`

+            emit_store stg src ofs

+        | {loc = Reg _; typ = Float}, {loc = Stack s} ->

+            let ofs = slot_offset s (register_class dst) in

+            emit_store "fsd" src ofs

         | {loc = Stack s; typ = (Val | Int | Addr)}, {loc = Reg _} ->

             let ofs = slot_offset s (register_class src) in

-            emit_load dst ofs

-        | {loc = Stack _; typ = Float}, {loc = Reg _} ->

-            `	fld	{emit_reg dst}, {emit_stack src}\n`

+            emit_load lg dst ofs

+        | {loc = Stack s; typ = Float}, {loc = Reg _} ->

+            let ofs = slot_offset s (register_class src) in

+            emit_load "fld" dst ofs

         | _ ->

             fatal_error "Emit: Imove"

       end

@@ -292,8 +306,7 @@ let emit_instr i =

       record_frame ~label i.live false i.dbg

   | Lop(Itailcall_ind {label_after = _}) ->

       let n = frame_size() in

-      if !contains_calls then

-        `	{emit_string lg}	ra, {emit_int(n - size_addr)}(sp)\n`;

+      if !contains_calls then reload_ra n;

       emit_stack_adjustment n;

       `	jr	{emit_reg i.arg.(0)}\n`

   | Lop(Itailcall_imm {func; label_after = _}) ->

@@ -301,8 +314,7 @@ let emit_instr i =

         `	j	{emit_label !tailrec_entry_point}\n`

       end else begin

         let n = frame_size() in

-        if !contains_calls then

-          `	{emit_string lg}	ra, {emit_int(n - size_addr)}(sp)\n`;

+        if !contains_calls then reload_ra n;

         emit_stack_adjustment n;

         `	tail	{emit_symbol func}\n`

       end

@@ -424,7 +436,7 @@ let emit_instr i =

       `	{emit_string instr}	{emit_reg i.res.(0)}, {emit_reg i.arg.(0)}, {emit_reg i.arg.(1)}, {emit_reg i.arg.(2)}\n`

   | Lreloadretaddr ->

       let n = frame_size () in

-      `	{emit_string lg}	ra, {emit_int(n - size_addr)}(sp)\n`

+      reload_ra n

   | Lreturn ->

       let n = frame_size() in

       emit_stack_adjustment n;

@@ -542,8 +554,7 @@ let fundecl fundecl =

   `{emit_symbol fundecl.fun_name}:\n`;

   let n = frame_size() in

   emit_stack_adjustment (-n);

-  if !contains_calls then

-    `	{emit_string stg}	ra, {emit_int(n - size_addr)}(sp)\n`;

+  if !contains_calls then store_ra n;

   `{emit_label !tailrec_entry_point}:\n`;

   emit_all fundecl.fun_body;

   List.iter emit_call_gc !call_gc_sites;

-- 

2.13.2