From 89337287749d57024df06eaceca1236899efdcd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Thu, 11 Nov 2010 14:54:18 +0100
Subject: Remove the last vestiges of the allocating fmove/2 instruction

There was a version of the BEAM loader and emulator that
had two versions of the fmove/2 instruction, one version
that allocated heap space internally and a newer version that
assumed that a previous test_heap/2 instruction had already
allocated the heap space.

Though the allocating fmove/2 instruction is no longer
supported, some vestiges of it still remains.
---
 erts/emulator/beam/beam_emu.c  | 7 +------
 erts/emulator/beam/beam_load.c | 9 ---------
 erts/emulator/beam/ops.tab     | 8 ++------
 3 files changed, 3 insertions(+), 21 deletions(-)

(limited to 'erts/emulator')

diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 8a0e12dd4f..254eba42d0 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -4723,7 +4723,7 @@ apply_bif_or_nif_epilogue:
      NextPF(2, next);
  }
 
- OpCase(fmove_new_ld): {
+ OpCase(fmove_ld): {
      Eterm fr = Arg(0);
      Eterm dest = make_float(HTOP);
 
@@ -4753,11 +4753,6 @@ apply_bif_or_nif_epilogue:
      NextPF(2, next);
  }
 
- /*
-  * Old allocating fmove.
-  */
-
-
 #ifdef NO_FPE_SIGNALS
      OpCase(fclearerror):
      OpCase(i_fcheckerror):
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index df5602b040..2f335faad0 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -326,11 +326,6 @@ typedef struct {
     Literal* literals;		/* Array of literals. */
     LiteralPatch* literal_patches; /* Operands that need to be patched. */
     Uint total_literal_size;	/* Total heap size for all literals. */
-
-    /*
-     * Floating point.
-     */
-    int new_float_instructions;	/* New allocation scheme for floating point. */
 } LoaderState;
 
 typedef struct {
@@ -818,7 +813,6 @@ init_state(LoaderState* stp)
     stp->total_literal_size = 0;
     stp->literal_patches = 0;
     stp->string_patches = 0;
-    stp->new_float_instructions = 0;
     stp->may_load_nif = 0;
     stp->on_load = 0;
 }
@@ -1618,7 +1612,6 @@ load_code(LoaderState* stp)
 			    BeamInstr val;
 			    BeamInstr words = 0;
 			    
-			    stp->new_float_instructions = 1;
 			    GetTagAndValue(stp, tag, n);
 			    VerifyTag(stp, tag, TAG_u);
 			    while (n-- > 0) {
@@ -2595,8 +2588,6 @@ binary_too_big_bits(LoaderState* stp, GenOpArg Size)
     return Size.type == TAG_u && (((Size.val+7)/8) >> (8*sizeof(Uint)-3) != 0);
 }
 
-#define new_float_allocation(Stp) ((Stp)->new_float_instructions)
-
 static GenOp*
 gen_put_binary(LoaderState* stp, GenOpArg Fail,GenOpArg Size,
 	       GenOpArg Unit, GenOpArg Flags, GenOpArg Src)
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index a2439d5582..8843dafa4b 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -1307,6 +1307,8 @@ fconv Arg=iqan Dst=l => move Arg x | fconv x Dst
 
 fmove q l
 fmove d l
+fmove l d
+
 fconv d l
 
 i_fadd l l l
@@ -1322,12 +1324,6 @@ fcheckerror p => i_fcheckerror
 i_fcheckerror
 fclearerror
 
-fmove FR=l Dst=d | new_float_allocation() => fmove_new FR Dst
- 
-# The new instruction for moving a float out of a floating point register.
-# (No allocation.)
-fmove_new l d
-
 #
 # New apply instructions in R10B.
 #
-- 
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