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tcg: add div/rem 32-bit helpers

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Some targets like ARM would benefit to use 32-bit helpers for
div/rem/divu/remu.

Create a #define for div2 so that targets can select between
div, div2 and helper implementation. Use the helper version if none
of the #define are present.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2010-03-02 23:16:36 +01:00
parent 7296abaccc
commit 31d6655100
7 changed files with 89 additions and 2 deletions
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24
tcg-runtime.c
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@ -25,6 +25,30 @@
#include "tcg/tcg-runtime.h"
/* 32-bit helpers */
int32_t tcg_helper_div_i32(int32_t arg1, int32_t arg2)
{
return arg1 / arg2;
}
int32_t tcg_helper_rem_i32(int32_t arg1, int32_t arg2)
{
return arg1 % arg2;
}
uint32_t tcg_helper_divu_i32(uint32_t arg1, uint32_t arg2)
{
return arg1 / arg2;
}
uint32_t tcg_helper_remu_i32(uint32_t arg1, uint32_t arg2)
{
return arg1 % arg2;
}
/* 64-bit helpers */
int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2)
{
return arg1 << arg2;

1
tcg/arm/tcg-target.h
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@ -56,6 +56,7 @@ enum {
#define TCG_TARGET_CALL_STACK_OFFSET 0
/* optional instructions */
#define TCG_TARGET_HAS_div2_i32
#define TCG_TARGET_HAS_ext8s_i32
#define TCG_TARGET_HAS_ext16s_i32
// #define TCG_TARGET_HAS_ext8u_i32

1
tcg/hppa/tcg-target.h
View File

@ -75,6 +75,7 @@ enum {
#define TCG_TARGET_STACK_GROWSUP
/* optional instructions */
#define TCG_TARGET_HAS_div2_i32
//#define TCG_TARGET_HAS_ext8s_i32
//#define TCG_TARGET_HAS_ext16s_i32
//#define TCG_TARGET_HAS_bswap16_i32

1
tcg/i386/tcg-target.h
View File

@ -45,6 +45,7 @@ enum {
#define TCG_TARGET_CALL_STACK_OFFSET 0
/* optional instructions */
#define TCG_TARGET_HAS_div2_i32
#define TCG_TARGET_HAS_rot_i32
#define TCG_TARGET_HAS_ext8s_i32
#define TCG_TARGET_HAS_ext16s_i32

57
tcg/tcg-op.h
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@ -364,6 +364,19 @@ static inline void tcg_gen_helperN(void *func, int flags, int sizemask,
tcg_temp_free_ptr(fn);
}
/* FIXME: Should this be pure? */
static inline void tcg_gen_helper32(void *func, TCGv_i32 ret,
TCGv_i32 a, TCGv_i32 b)
{
TCGv_ptr fn;
TCGArg args[2];
fn = tcg_const_ptr((tcg_target_long)func);
args[0] = GET_TCGV_I32(a);
args[1] = GET_TCGV_I32(b);
tcg_gen_callN(&tcg_ctx, fn, 0, 0, GET_TCGV_I32(ret), 2, args);
tcg_temp_free_ptr(fn);
}
/* FIXME: Should this be pure? */
static inline void tcg_gen_helper64(void *func, TCGv_i64 ret,
TCGv_i64 a, TCGv_i64 b)
@ -635,7 +648,7 @@ static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_op3_i32(INDEX_op_remu_i32, ret, arg1, arg2);
}
#else
#elif defined(TCG_TARGET_HAS_div2_i32)
static inline void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
TCGv_i32 t0;
@ -671,6 +684,26 @@ static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
tcg_gen_op5_i32(INDEX_op_divu2_i32, t0, ret, arg1, t0, arg2);
tcg_temp_free_i32(t0);
}
#else
static inline void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_div_i32, ret, arg1, arg2);
}
static inline void tcg_gen_rem_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_rem_i32, ret, arg1, arg2);
}
static inline void tcg_gen_divu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_divu_i32, ret, arg1, arg2);
}
static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_remu_i32, ret, arg1, arg2);
}
#endif
#if TCG_TARGET_REG_BITS == 32
@ -1135,7 +1168,7 @@ static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_op3_i64(INDEX_op_remu_i64, ret, arg1, arg2);
}
#else
#elif defined(TCG_TARGET_HAS_div2_i64)
static inline void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
TCGv_i64 t0;
@ -1171,6 +1204,26 @@ static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
tcg_gen_op5_i64(INDEX_op_divu2_i64, t0, ret, arg1, t0, arg2);
tcg_temp_free_i64(t0);
}
#else
static inline void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_div_i64, ret, arg1, arg2);
}
static inline void tcg_gen_rem_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_rem_i64, ret, arg1, arg2);
}
static inline void tcg_gen_divu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_divu_i64, ret, arg1, arg2);
}
static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_remu_i64, ret, arg1, arg2);
}
#endif
#endif

5
tcg/tcg-runtime.h
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@ -2,6 +2,11 @@
#define TCG_RUNTIME_H
/* tcg-runtime.c */
int32_t tcg_helper_div_i32(int32_t arg1, int32_t arg2);
int32_t tcg_helper_rem_i32(int32_t arg1, int32_t arg2);
uint32_t tcg_helper_divu_i32(uint32_t arg1, uint32_t arg2);
uint32_t tcg_helper_remu_i32(uint32_t arg1, uint32_t arg2);
int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);

2
tcg/x86_64/tcg-target.h
View File

@ -56,6 +56,8 @@ enum {
#define TCG_TARGET_CALL_STACK_OFFSET 0
/* optional instructions */
#define TCG_TARGET_HAS_div2_i32
#define TCG_TARGET_HAS_div2_i64
#define TCG_TARGET_HAS_bswap16_i32
#define TCG_TARGET_HAS_bswap16_i64
#define TCG_TARGET_HAS_bswap32_i32