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@@ -1,5 +1,5 @@
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/*
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-** $Id: lopcodes.h,v 1.162 2017/09/28 16:53:29 roberto Exp roberto $
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+** $Id: lopcodes.h,v 1.163 2017/10/01 19:13:43 roberto Exp roberto $
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** Opcodes for Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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@@ -12,15 +12,15 @@
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/*===========================================================================
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We assume that instructions are unsigned 32-bit integers.
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- All instructions have an opcode in the first 6 bits.
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+ All instructions have an opcode in the first 7 bits.
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Instructions can have the following formats:
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3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
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1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
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-iABC | C(9) | | B(9) | | A(8) | | Op(6) |
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-iABx | Bx(18) | | A(8) | | Op(6) |
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-iAsBx | sBx (signed)(18) | | A(8) | | Op(6) |
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-iAx | Ax(26) | | Op(6) |
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+iABC | C(9) | | B(8) | | A(8) | | Op(7) |
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+iABx | Bx(17) | | A(8) | | Op(7) |
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+iAsBx | sBx (signed)(17) | | A(8) | | Op(7) |
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+iAx | Ax(25) | | Op(7) |
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A signed argument is represented in excess K: the represented value is
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the written unsigned value minus K, where K is half the maximum for the
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@@ -35,12 +35,12 @@ enum OpMode {iABC, iABx, iAsBx, iAx}; /* basic instruction format */
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** size and position of opcode arguments.
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*/
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#define SIZE_C 9
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-#define SIZE_B 9
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+#define SIZE_B 8
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#define SIZE_Bx (SIZE_C + SIZE_B)
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#define SIZE_A 8
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#define SIZE_Ax (SIZE_C + SIZE_B + SIZE_A)
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-#define SIZE_OP 6
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+#define SIZE_OP 7
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#define POS_OP 0
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#define POS_A (POS_OP + SIZE_OP)
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Roberto Ierusalimschy