inst.h File Reference

Bytecode instruction format. More...

#include <reduct/defs.h>
#include <reduct/opcode.h>

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Macros
#define	REDUCT_REGISTER_INVALID   ((reduct_reg_t) - 1)
	Invalid register value.
#define	REDUCT_INST_READS_REG(_inst, _reg)
	Check if an instruction reads from a specific register.
#define	REDUCT_INST_WRITES_REG(_inst, _reg)    (REDUCT_OPCODE_HAS_TARGET(REDUCT_INST_GET_OP(_inst)) && (_reg) == REDUCT_INST_GET_A(_inst))
	Check if an instruction writes to a specific register.
#define	REDUCT_INST_WIDTH_OPCODE   8U
	Opcode width in bits.
#define	REDUCT_INST_WIDTH_A   8U
	A operand width in bits.
#define	REDUCT_INST_WIDTH_B   8U
	B operand width in bits.
#define	REDUCT_INST_WIDTH_C   8U
	C operand width in bits.
#define	REDUCT_INST_WIDTH_SAX   (REDUCT_INST_WIDTH_A + REDUCT_INST_WIDTH_B)
	SAx operand width in bits.
#define	REDUCT_REGISTER_MAX   (1U << REDUCT_INST_WIDTH_A)
	The max number of registers per function frame.
#define	REDUCT_CONSTANT_MAX   (1U << REDUCT_INST_WIDTH_C)
	The max number of constants per function.
#define	REDUCT_INST_POS_OPCODE   0U
	Opcode position in bits.
#define	REDUCT_INST_POS_A   (REDUCT_INST_POS_OPCODE + REDUCT_INST_WIDTH_OPCODE)
	A operand position in bits.
#define	REDUCT_INST_POS_B   (REDUCT_INST_POS_A + REDUCT_INST_WIDTH_A)
	B operand position in bits.
#define	REDUCT_INST_POS_C   (REDUCT_INST_POS_B + REDUCT_INST_WIDTH_B)
	C operand position in bits.
#define	REDUCT_INST_POS_SAX   (REDUCT_INST_POS_A)
	SAx operand position in bits.
#define	REDUCT_INST_MASK_OPCODE   ((1U << REDUCT_INST_WIDTH_OPCODE) - 1U)
	Opcode mask.
#define	REDUCT_INST_MASK_A   ((1U << REDUCT_INST_WIDTH_A) - 1U)
	A operand mask.
#define	REDUCT_INST_MASK_B   ((1U << REDUCT_INST_WIDTH_B) - 1U)
	B operand mask.
#define	REDUCT_INST_MASK_C   ((1U << REDUCT_INST_WIDTH_C) - 1U)
	C operand mask.
#define	REDUCT_INST_MASK_SAX   ((1U << REDUCT_INST_WIDTH_SAX) - 1U)
	SAx operand mask.
#define	REDUCT_INST_MAKE_ABC(_op, _a, _b, _c)
	Create an instruction with opcode, A, B, and C operands.
#define	REDUCT_INST_MAKE_SAXC(_op, _sax, _c)
	Create an instruction with opcode and SAx operand, and C operand.
#define	REDUCT_INST_GET_OP(_inst)   (((_inst) >> REDUCT_INST_POS_OPCODE) & REDUCT_INST_MASK_OPCODE)
	Get the opcode from an instruction.
#define	REDUCT_INST_GET_A(_inst)   (((_inst) >> REDUCT_INST_POS_A) & REDUCT_INST_MASK_A)
	Get the A operand from an instruction.
#define	REDUCT_INST_GET_B(_inst)   (((_inst) >> REDUCT_INST_POS_B) & REDUCT_INST_MASK_B)
	Get the B operand from an instruction.
#define	REDUCT_INST_GET_C(_inst)   (((_inst) >> REDUCT_INST_POS_C) & REDUCT_INST_MASK_C)
	Get the C operand from an instruction.
#define	REDUCT_INST_GET_SAX(_inst)   ((int32_t)(int16_t)(((_inst) >> REDUCT_INST_POS_SAX) & REDUCT_INST_MASK_SAX))
	Get the SAX operand from an instruction.
#define	REDUCT_INST_SET_OP(_inst, _op)
	Set the opcode in an instruction.
#define	REDUCT_INST_SET_A(_inst, _a)    (((_inst) & ~(REDUCT_INST_MASK_A << REDUCT_INST_POS_A)) | (((_a) & REDUCT_INST_MASK_A) << REDUCT_INST_POS_A))
	Set the A operand in an instruction.
#define	REDUCT_INST_SET_B(_inst, _b)    (((_inst) & ~(REDUCT_INST_MASK_B << REDUCT_INST_POS_B)) | (((_b) & REDUCT_INST_MASK_B) << REDUCT_INST_POS_B))
	Set the B operand in an instruction.
#define	REDUCT_INST_SET_C(_inst, _c)    (((_inst) & ~(REDUCT_INST_MASK_C << REDUCT_INST_POS_C)) | (((_c) & REDUCT_INST_MASK_C) << REDUCT_INST_POS_C))
	Set the C operand in an instruction.
#define	REDUCT_INST_SET_SAX(_inst, _sax)    (((_inst) & ~(REDUCT_INST_MASK_SAX << REDUCT_INST_POS_A)) | (((_sax) & REDUCT_INST_MASK_SAX) << REDUCT_INST_POS_A))
	Set the SAX operand in an instruction.

Typedefs
typedef uint16_t	reduct_const_t
	Constant index type.
typedef uint16_t	reduct_reg_t
	Register type.
typedef uint32_t	reduct_inst_t
	Instruction type.

Detailed Description

Bytecode instruction format.

Definition in file inst.h.