1 files changed, 358 insertions, 0 deletions
diff --git a/src/copyjit.c b/src/copyjit.c
new file mode 100644
index 0000000..e76bb99
--- /dev/null
+++ b/src/copyjit.c
@@ -0,0 +1,358 @@
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include "copyjit.h"
+
+#include "../lib/ops.h"
+#include "../lib/defns.h"
+#include "../ops/common.h"
+
+#define SELECT(i, ctx, name) \
+case i: name##i (ctx); break;
+
+#define SELECT64(ctx, name)   \
+	SELECT(0, ctx, name)  \
+	SELECT(1, ctx, name)  \
+	SELECT(2, ctx, name)  \
+	SELECT(3, ctx, name)  \
+	SELECT(4, ctx, name)  \
+	SELECT(5, ctx, name)  \
+	SELECT(6, ctx, name)  \
+	SELECT(7, ctx, name)  \
+	SELECT(8, ctx, name)  \
+	SELECT(9, ctx, name)  \
+	SELECT(10, ctx, name) \
+	SELECT(11, ctx, name) \
+	SELECT(12, ctx, name) \
+	SELECT(13, ctx, name) \
+	SELECT(14, ctx, name) \
+	SELECT(15, ctx, name) \
+	SELECT(16, ctx, name) \
+	SELECT(17, ctx, name) \
+	SELECT(18, ctx, name) \
+	SELECT(19, ctx, name) \
+	SELECT(20, ctx, name) \
+	SELECT(21, ctx, name) \
+	SELECT(22, ctx, name) \
+	SELECT(23, ctx, name) \
+	SELECT(24, ctx, name) \
+	SELECT(25, ctx, name) \
+	SELECT(26, ctx, name) \
+	SELECT(27, ctx, name) \
+	SELECT(28, ctx, name) \
+	SELECT(29, ctx, name) \
+	SELECT(30, ctx, name) \
+	SELECT(31, ctx, name) \
+	SELECT(32, ctx, name) \
+	SELECT(33, ctx, name) \
+	SELECT(34, ctx, name) \
+	SELECT(35, ctx, name) \
+	SELECT(36, ctx, name) \
+	SELECT(37, ctx, name) \
+	SELECT(38, ctx, name) \
+	SELECT(39, ctx, name) \
+	SELECT(40, ctx, name) \
+	SELECT(41, ctx, name) \
+	SELECT(42, ctx, name) \
+	SELECT(43, ctx, name) \
+	SELECT(44, ctx, name) \
+	SELECT(45, ctx, name) \
+	SELECT(46, ctx, name) \
+	SELECT(47, ctx, name) \
+	SELECT(48, ctx, name) \
+	SELECT(49, ctx, name) \
+	SELECT(50, ctx, name) \
+	SELECT(51, ctx, name) \
+	SELECT(52, ctx, name) \
+	SELECT(53, ctx, name) \
+	SELECT(54, ctx, name) \
+	SELECT(55, ctx, name) \
+	SELECT(56, ctx, name) \
+	SELECT(57, ctx, name) \
+	SELECT(58, ctx, name) \
+	SELECT(59, ctx, name) \
+	SELECT(60, ctx, name) \
+	SELECT(61, ctx, name) \
+	SELECT(62, ctx, name) \
+	SELECT(63, ctx, name) \
+
+#define SELECT256(ctx, name)   \
+	SELECT64(ctx, name)    \
+	SELECT(64, ctx, name)  \
+	SELECT(65, ctx, name)  \
+	SELECT(66, ctx, name)  \
+	SELECT(67, ctx, name)  \
+	SELECT(68, ctx, name)  \
+	SELECT(69, ctx, name)  \
+	SELECT(70, ctx, name)  \
+	SELECT(71, ctx, name)  \
+	SELECT(72, ctx, name)  \
+	SELECT(73, ctx, name)  \
+	SELECT(74, ctx, name)  \
+	SELECT(75, ctx, name)  \
+	SELECT(76, ctx, name)  \
+	SELECT(77, ctx, name)  \
+	SELECT(78, ctx, name)  \
+	SELECT(79, ctx, name)  \
+	SELECT(80, ctx, name)  \
+	SELECT(81, ctx, name)  \
+	SELECT(82, ctx, name)  \
+	SELECT(83, ctx, name)  \
+	SELECT(84, ctx, name)  \
+	SELECT(85, ctx, name)  \
+	SELECT(86, ctx, name)  \
+	SELECT(87, ctx, name)  \
+	SELECT(88, ctx, name)  \
+	SELECT(89, ctx, name)  \
+	SELECT(90, ctx, name)  \
+	SELECT(91, ctx, name)  \
+	SELECT(92, ctx, name)  \
+	SELECT(93, ctx, name)  \
+	SELECT(94, ctx, name)  \
+	SELECT(95, ctx, name)  \
+	SELECT(96, ctx, name)  \
+	SELECT(97, ctx, name)  \
+	SELECT(98, ctx, name)  \
+	SELECT(99, ctx, name)  \
+	SELECT(100, ctx, name) \
+	SELECT(101, ctx, name) \
+	SELECT(102, ctx, name) \
+	SELECT(103, ctx, name) \
+	SELECT(104, ctx, name) \
+	SELECT(105, ctx, name) \
+	SELECT(106, ctx, name) \
+	SELECT(107, ctx, name) \
+	SELECT(108, ctx, name) \
+	SELECT(109, ctx, name) \
+	SELECT(110, ctx, name) \
+	SELECT(111, ctx, name) \
+	SELECT(112, ctx, name) \
+	SELECT(113, ctx, name) \
+	SELECT(114, ctx, name) \
+	SELECT(115, ctx, name) \
+	SELECT(116, ctx, name) \
+	SELECT(117, ctx, name) \
+	SELECT(118, ctx, name) \
+	SELECT(119, ctx, name) \
+	SELECT(120, ctx, name) \
+	SELECT(121, ctx, name) \
+	SELECT(122, ctx, name) \
+	SELECT(123, ctx, name) \
+	SELECT(124, ctx, name) \
+	SELECT(125, ctx, name) \
+	SELECT(126, ctx, name) \
+	SELECT(127, ctx, name) \
+	SELECT(128, ctx, name) \
+	SELECT(129, ctx, name) \
+	SELECT(130, ctx, name) \
+	SELECT(131, ctx, name) \
+	SELECT(132, ctx, name) \
+	SELECT(133, ctx, name) \
+	SELECT(134, ctx, name) \
+	SELECT(135, ctx, name) \
+	SELECT(136, ctx, name) \
+	SELECT(137, ctx, name) \
+	SELECT(138, ctx, name) \
+	SELECT(139, ctx, name) \
+	SELECT(140, ctx, name) \
+	SELECT(141, ctx, name) \
+	SELECT(142, ctx, name) \
+	SELECT(143, ctx, name) \
+	SELECT(144, ctx, name) \
+	SELECT(145, ctx, name) \
+	SELECT(146, ctx, name) \
+	SELECT(147, ctx, name) \
+	SELECT(148, ctx, name) \
+	SELECT(149, ctx, name) \
+	SELECT(150, ctx, name) \
+	SELECT(151, ctx, name) \
+	SELECT(152, ctx, name) \
+	SELECT(153, ctx, name) \
+	SELECT(154, ctx, name) \
+	SELECT(155, ctx, name) \
+	SELECT(156, ctx, name) \
+	SELECT(157, ctx, name) \
+	SELECT(158, ctx, name) \
+	SELECT(159, ctx, name) \
+	SELECT(160, ctx, name) \
+	SELECT(161, ctx, name) \
+	SELECT(162, ctx, name) \
+	SELECT(163, ctx, name) \
+	SELECT(164, ctx, name) \
+	SELECT(165, ctx, name) \
+	SELECT(166, ctx, name) \
+	SELECT(167, ctx, name) \
+	SELECT(168, ctx, name) \
+	SELECT(169, ctx, name) \
+	SELECT(170, ctx, name) \
+	SELECT(171, ctx, name) \
+	SELECT(172, ctx, name) \
+	SELECT(173, ctx, name) \
+	SELECT(174, ctx, name) \
+	SELECT(175, ctx, name) \
+	SELECT(176, ctx, name) \
+	SELECT(177, ctx, name) \
+	SELECT(178, ctx, name) \
+	SELECT(179, ctx, name) \
+	SELECT(180, ctx, name) \
+	SELECT(181, ctx, name) \
+	SELECT(182, ctx, name) \
+	SELECT(183, ctx, name) \
+	SELECT(184, ctx, name) \
+	SELECT(185, ctx, name) \
+	SELECT(186, ctx, name) \
+	SELECT(187, ctx, name) \
+	SELECT(188, ctx, name) \
+	SELECT(189, ctx, name) \
+	SELECT(190, ctx, name) \
+	SELECT(191, ctx, name) \
+	SELECT(192, ctx, name) \
+	SELECT(193, ctx, name) \
+	SELECT(194, ctx, name) \
+	SELECT(195, ctx, name) \
+	SELECT(196, ctx, name) \
+	SELECT(197, ctx, name) \
+	SELECT(198, ctx, name) \
+	SELECT(199, ctx, name) \
+	SELECT(200, ctx, name) \
+	SELECT(201, ctx, name) \
+	SELECT(202, ctx, name) \
+	SELECT(203, ctx, name) \
+	SELECT(204, ctx, name) \
+	SELECT(205, ctx, name) \
+	SELECT(206, ctx, name) \
+	SELECT(207, ctx, name) \
+	SELECT(208, ctx, name) \
+	SELECT(209, ctx, name) \
+	SELECT(210, ctx, name) \
+	SELECT(211, ctx, name) \
+	SELECT(212, ctx, name) \
+	SELECT(213, ctx, name) \
+	SELECT(214, ctx, name) \
+	SELECT(215, ctx, name) \
+	SELECT(216, ctx, name) \
+	SELECT(217, ctx, name) \
+	SELECT(218, ctx, name) \
+	SELECT(219, ctx, name) \
+	SELECT(220, ctx, name) \
+	SELECT(221, ctx, name) \
+	SELECT(222, ctx, name) \
+	SELECT(223, ctx, name) \
+	SELECT(224, ctx, name) \
+	SELECT(225, ctx, name) \
+	SELECT(226, ctx, name) \
+	SELECT(227, ctx, name) \
+	SELECT(228, ctx, name) \
+	SELECT(229, ctx, name) \
+	SELECT(230, ctx, name) \
+	SELECT(231, ctx, name) \
+	SELECT(232, ctx, name) \
+	SELECT(233, ctx, name) \
+	SELECT(234, ctx, name) \
+	SELECT(235, ctx, name) \
+	SELECT(236, ctx, name) \
+	SELECT(237, ctx, name) \
+	SELECT(238, ctx, name) \
+	SELECT(239, ctx, name) \
+	SELECT(240, ctx, name) \
+	SELECT(241, ctx, name) \
+	SELECT(242, ctx, name) \
+	SELECT(243, ctx, name) \
+	SELECT(244, ctx, name) \
+	SELECT(245, ctx, name) \
+	SELECT(246, ctx, name) \
+	SELECT(247, ctx, name) \
+	SELECT(248, ctx, name) \
+	SELECT(249, ctx, name) \
+	SELECT(250, ctx, name) \
+	SELECT(251, ctx, name) \
+	SELECT(252, ctx, name) \
+	SELECT(253, ctx, name) \
+	SELECT(254, ctx, name) \
+	SELECT(255, ctx, name)
+
+static void select_uli(ctx_t *ctx, uint8_t i)
+{
+	/* should maybe be uli? */
+	switch (i) {
+		SELECT256(ctx, compile_li);
+	}
+}
+
+static void select_uaddi(ctx_t *ctx, uint8_t i)
+{
+	switch (i) {
+		SELECT256(ctx, compile_addi);
+	}
+}
+
+static void select_slo(ctx_t *ctx, uint8_t i)
+{
+	switch (i) {
+		SELECT64(ctx, compile_slo);
+	}
+}
+
+#define NTH_BYTE(i, n) ((i) >> ((n) * 8) & 0xff)
+void *compile_uli(ctx_t *ctx, unsigned long i)
+{
+	void *pc = ctx->pc;
+
+	if (i < 256) {
+		select_uli(ctx, i);
+		return pc;
+	}
+
+	/* find first non-zero byte */
+	int nz = sizeof(unsigned long) - 1;
+	for (; nz >= 0; --nz)
+		if (NTH_BYTE(i, nz) != 0)
+			break;
+
+	/* start populating */
+	select_uli(ctx, i >> (nz * 8));
+
+	size_t shifts = 1;
+	for (nz--; nz >= 0; --nz) {
+		if (NTH_BYTE(i, nz) == 0) {
+			shifts++;
+			continue;
+		}
+
+		select_slo(ctx, shifts * 8);
+		select_uaddi(ctx, NTH_BYTE(i, nz));
+		shifts = 1;
+	}
+
+	/* last octet is zero, meaning it fell through the for loop */
+	if (shifts != 1)
+		select_slo(ctx, (shifts - 1) * 8);
+
+	return pc;
+}
+
+void compile_start(ctx_t *ctx)
+{
+	/* random number for now */
+	/* oh yeah, have to ask for executable space */
+	ctx->size = 4096;
+	ctx->buf = mmap(NULL, ctx->size,
+	                PROT_WRITE | PROT_READ | PROT_EXEC,
+	                MAP_PRIVATE | MAP_ANONYMOUS,
+	                -1, 0);
+	ctx->pc = ctx->buf;
+}
+
+void compile_finish(ctx_t *ctx)
+{
+	__builtin___clear_cache(ctx->buf, ctx->buf + ctx->size);
+}
+
+void run(ctx_t *ctx)
+{
+	void *sp = malloc(4096);
+	JUMP(ctx->buf, sp, 0, 0, 0, 0);
+	free(sp);
+}