[PATCH] lsr for ARM jit

On Mon, Aug 19, 2002 at 09:24:47PM +0000, Jason Gloudon wrote:
> # New Ticket Created by  Jason Gloudon 
> # Please include the string:  [perl #16308]
> # in the subject line of all future correspondence about this issue. 
> # <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=16308 >
> 
> 
> 
> This adds logical shift right opcodes. They are essential for bit shifting
> negative values without sign extension getting in the way.

Here are logical shift right opcodes for the ARM jit.
(Cargo cult coding)

I probably shouldn't have bothered with Parrot_lsr_i_ic_ic, particularly
as I feel that all two integer constant input permutation of integer binary
ops should not be autogenerated.

Nicholas Clark
-- 
Even better than the real thing:	http://nms-cgi.sourceforge.net/

--- jit/arm/core.jit~	Tue Aug 13 22:56:23 2002
+++ jit/arm/core.jit	Sat Sep  7 15:56:06 2002
@@ -506,6 +506,39 @@ Parrot_shr_i_ic_ic {
     Parrot_jit_int_store(jit_info, interpreter, cond_AL, 1, r0);
 }
 
+Parrot_lsr_i_i_i {
+    Parrot_jit_int_load(jit_info, interpreter, cond_AL, 2, r0);
+    Parrot_jit_int_load(jit_info, interpreter, cond_AL, 3, r1);
+    jit_info->native_ptr
+       = emit_arith_reg_shift_reg (jit_info->native_ptr, cond_AL,
+                                   MOV, 0, r2, 0, r0, shift_LSR, r1);
+    Parrot_jit_int_store(jit_info, interpreter, cond_AL, 1, r2);
+}
+Parrot_lsr_i_i_ic {
+    Parrot_jit_int_load(jit_info, interpreter, cond_AL, 2, r0);
+    jit_info->native_ptr
+       = emit_arith_reg_shift_const (jit_info->native_ptr, cond_AL,
+                                     MOV, 0, r2, 0, r0, shift_LSR,
+                                     *INT_CONST[3]);
+    Parrot_jit_int_store(jit_info, interpreter, cond_AL, 1, r2);
+}
+Parrot_lsr_i_ic_i {
+    Parrot_jit_int_load(jit_info, interpreter, cond_AL, 2, r0);
+    Parrot_jit_int_load(jit_info, interpreter, cond_AL, 3, r1);
+    jit_info->native_ptr
+       = emit_arith_reg_shift_reg (jit_info->native_ptr, cond_AL,
+                                   MOV, 0, r2, 0, r0, shift_LSR, r1);
+    Parrot_jit_int_store(jit_info, interpreter, cond_AL, 1, r2);
+}
+Parrot_lsr_i_ic_ic {
+    jit_info->native_ptr = emit_load_constant (jit_info->native_ptr,
+                                               interpreter,
+                                               cond_AL,
+                                               ((UINTVAL)*INT_CONST[2]) >> *INT_CONST[3],
+                                               r0);
+    Parrot_jit_int_store(jit_info, interpreter, cond_AL, 1, r0);
+}
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ; logical ops
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

• [perl #16308] [PATCH] logical right shift by Jason Gloudon
• [PATCH] lsr for ARM jit by Nicholas Clark
• Re: [PATCH] lsr for ARM jit by Nicholas Clark
• Re: [perl #16308] [PATCH] logical right shift by Mike Lambert