[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [4722] Use rem/div[u]_i32 drop div[u]2_i32
|
From: |
malc |
|
Subject: |
[Qemu-devel] [4722] Use rem/div[u]_i32 drop div[u]2_i32 |
|
Date: |
Mon, 09 Jun 2008 23:44:44 +0000 |
Revision: 4722
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4722
Author: malc
Date: 2008-06-09 23:44:44 +0000 (Mon, 09 Jun 2008)
Log Message:
-----------
Use rem/div[u]_i32 drop div[u]2_i32
Modified Paths:
--------------
trunk/tcg/ppc/tcg-target.c
trunk/tcg/ppc/tcg-target.h
Modified: trunk/tcg/ppc/tcg-target.c
===================================================================
--- trunk/tcg/ppc/tcg-target.c 2008-06-09 23:44:20 UTC (rev 4721)
+++ trunk/tcg/ppc/tcg-target.c 2008-06-09 23:44:44 UTC (rev 4722)
@@ -23,8 +23,6 @@
*/
static uint8_t *tb_ret_addr;
-static uint8_t *udiv_addr;
-static uint8_t *div_addr;
#define FAST_PATH
#if TARGET_PHYS_ADDR_BITS <= 32
@@ -137,22 +135,6 @@
TCG_REG_R31
};
-static const int div_save_regs[] = {
- TCG_REG_R4,
- TCG_REG_R5,
- TCG_REG_R7,
- TCG_REG_R8,
- TCG_REG_R9,
- TCG_REG_R10,
- TCG_REG_R11,
- TCG_REG_R12,
- TCG_REG_R13, /* should r13 be saved? */
- TCG_REG_R24,
- TCG_REG_R25,
- TCG_REG_R26,
- TCG_REG_R27,
-};
-
static uint32_t reloc_pc24_val (void *pc, tcg_target_long target)
{
tcg_target_long disp;
@@ -817,22 +799,6 @@
#endif
}
-static uint64_t ppc_udiv_helper (uint64_t a, uint32_t b)
-{
- uint64_t rem, quo;
- quo = a / b;
- rem = a % b;
- return (rem << 32) | (uint32_t) quo;
-}
-
-static uint64_t ppc_div_helper (int64_t a, int32_t b)
-{
- int64_t rem, quo;
- quo = a / b;
- rem = a % b;
- return (rem << 32) | (uint32_t) quo;
-}
-
void tcg_target_qemu_prologue (TCGContext *s)
{
int i, j, frame_size;
@@ -871,49 +837,6 @@
tcg_out32 (s, MTSPR | RS (0) | LR);
tcg_out32 (s, ADDI | RT (1) | RA (1) | frame_size);
tcg_out32 (s, BCLR | BO_ALWAYS);
-
- /* div trampolines */
- for (j = 0; j < 2; ++j) {
- tcg_target_long target;
-
- frame_size = 8 + ARRAY_SIZE (div_save_regs) * 4;
- frame_size = (frame_size + 15) & ~15;
-
- if (j == 0) {
- target = (tcg_target_long) ppc_udiv_helper;
- udiv_addr = s->code_ptr;
- }
- else {
- target = (tcg_target_long) ppc_div_helper;
- div_addr = s->code_ptr;
- }
-
- tcg_out32 (s, MFSPR | RT (0) | LR);
- tcg_out32 (s, STWU | RS (1) | RA (1) | (-frame_size & 0xffff));
- for (i = 0; i < ARRAY_SIZE (div_save_regs); ++i)
- tcg_out32 (s, (STW
- | RS (div_save_regs[i])
- | RA (1)
- | (i * 4 + 8)
- )
- );
- tcg_out32 (s, STW | RS (0) | RA (1) | (frame_size - 4));
- tcg_out_mov (s, 4, 6);
- tcg_out_b (s, LK, target);
- tcg_out_mov (s, 6, 4);
-
- for (i = 0; i < ARRAY_SIZE (div_save_regs); ++i)
- tcg_out32 (s, (LWZ
- | RT (div_save_regs[i])
- | RA (1)
- | (i * 4 + 8)
- )
- );
- tcg_out32 (s, LWZ | RT (0) | RA (1) | (frame_size - 4));
- tcg_out32 (s, MTSPR | RS (0) | LR);
- tcg_out32 (s, ADDI | RT (1) | RA (1) | frame_size);
- tcg_out32 (s, BCLR | BO_ALWAYS);
- }
}
static void tcg_out_ld (TCGContext *s, TCGType type, int ret, int arg1,
@@ -1095,34 +1018,6 @@
tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr);
}
-static void tcg_out_div2 (TCGContext *s, int uns)
-{
- void *label1_ptr, *label2_ptr;
-
- if (uns)
- tcg_out32 (s, CMPLI | BF (7) | RA (3));
- else {
- tcg_out32 (s, SRAWI | RS (4) | RA (0) | 31);
- tcg_out32 (s, CMPL | BF (7) | RA (3) | RB (4));
- }
-
- label1_ptr = s->code_ptr;
- tcg_out32 (s, BC | BI (7, CR_EQ) | BO_COND_TRUE);
-
- tcg_out_b (s, LK, (tcg_target_long) (uns ? udiv_addr : div_addr));
-
- label2_ptr = s->code_ptr;
- tcg_out32 (s, B);
-
- reloc_pc14 (label1_ptr, (tcg_target_long) s->code_ptr);
-
- tcg_out32 (s, (uns ? DIVWU : DIVW) | TAB (6, 4, 5));
- tcg_out32 (s, MULLW | TAB (0, 6, 5));
- tcg_out32 (s, SUBF | TAB (3, 0, 4));
-
- reloc_pc24 (label2_ptr, (tcg_target_long) s->code_ptr);
-}
-
static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
const int *const_args)
{
@@ -1301,6 +1196,27 @@
else
tcg_out32 (s, MULLW | TAB (args[0], args[1], args[2]));
break;
+
+ case INDEX_op_div_i32:
+ tcg_out32 (s, DIVW | TAB (args[0], args[1], args[2]));
+ break;
+
+ case INDEX_op_divu_i32:
+ tcg_out32 (s, DIVWU | TAB (args[0], args[1], args[2]));
+ break;
+
+ case INDEX_op_rem_i32:
+ tcg_out32 (s, DIVW | TAB (0, args[1], args[2]));
+ tcg_out32 (s, MULLW | TAB (0, 0, args[2]));
+ tcg_out32 (s, SUBF | TAB (args[0], 0, args[1]));
+ break;
+
+ case INDEX_op_remu_i32:
+ tcg_out32 (s, DIVWU | TAB (0, args[1], args[2]));
+ tcg_out32 (s, MULLW | TAB (0, 0, args[2]));
+ tcg_out32 (s, SUBF | TAB (args[0], 0, args[1]));
+ break;
+
case INDEX_op_mulu2_i32:
if (args[0] == args[2] || args[0] == args[3]) {
tcg_out32 (s, MULLW | TAB (0, args[2], args[3]));
@@ -1312,12 +1228,6 @@
tcg_out32 (s, MULHWU | TAB (args[1], args[2], args[3]));
}
break;
- case INDEX_op_div2_i32:
- tcg_out_div2 (s, 0);
- break;
- case INDEX_op_divu2_i32:
- tcg_out_div2 (s, 1);
- break;
case INDEX_op_shl_i32:
if (const_args[2]) {
@@ -1458,9 +1368,11 @@
{ INDEX_op_add_i32, { "r", "r", "ri" } },
{ INDEX_op_mul_i32, { "r", "r", "ri" } },
+ { INDEX_op_div_i32, { "r", "r", "r" } },
+ { INDEX_op_divu_i32, { "r", "r", "r" } },
+ { INDEX_op_rem_i32, { "r", "r", "r" } },
+ { INDEX_op_remu_i32, { "r", "r", "r" } },
{ INDEX_op_mulu2_i32, { "r", "r", "r", "r" } },
- { INDEX_op_div2_i32, { "D", "A", "B", "1", "C" } },
- { INDEX_op_divu2_i32, { "D", "A", "B", "1", "C" } },
{ INDEX_op_sub_i32, { "r", "r", "ri" } },
{ INDEX_op_and_i32, { "r", "r", "ri" } },
{ INDEX_op_or_i32, { "r", "r", "ri" } },
Modified: trunk/tcg/ppc/tcg-target.h
===================================================================
--- trunk/tcg/ppc/tcg-target.h 2008-06-09 23:44:20 UTC (rev 4721)
+++ trunk/tcg/ppc/tcg-target.h 2008-06-09 23:44:44 UTC (rev 4722)
@@ -70,6 +70,7 @@
/* optional instructions */
#define TCG_TARGET_HAS_neg_i32
+#define TCG_TARGET_HAS_div_i32
#define TCG_AREG0 TCG_REG_R27
#define TCG_AREG1 TCG_REG_R24
| [Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-devel] [4722] Use rem/div[u]_i32 drop div[u]2_i32,
malc <=