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Add zero extension (pseudo-)ops. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4424 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-05-11 12:22:01 +00:00
parent c96402b11e
commit 868314358e
4 changed files with 61 additions and 14 deletions
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18
target-arm/translate.c
View File

@ -221,8 +221,8 @@ static void store_reg(DisasContext *s, int reg, TCGv var)
#define gen_op_rorl_T1_im(im) tcg_gen_rori_i32(cpu_T[1], cpu_T[1], im)
/* Value extensions. */
#define gen_uxtb(var) tcg_gen_andi_i32(var, var, 0xff)
#define gen_uxth(var) tcg_gen_andi_i32(var, var, 0xffff)
#define gen_uxtb(var) tcg_gen_ext8u_i32(var, var)
#define gen_uxth(var) tcg_gen_ext16u_i32(var, var)
#define gen_sxtb(var) tcg_gen_ext8s_i32(var, var)
#define gen_sxth(var) tcg_gen_ext16s_i32(var, var)
@ -1446,7 +1446,7 @@ static void gen_op_iwmmxt_setpsr_nz(void)
static inline void gen_op_iwmmxt_addl_M0_wRn(int rn)
{
iwmmxt_load_reg(cpu_V1, rn);
tcg_gen_andi_i64(cpu_V1, cpu_V1, 0xffffffffu);
tcg_gen_ext32u_i64(cpu_V1, cpu_V1);
tcg_gen_add_i64(cpu_M0, cpu_M0, cpu_V1);
}
@ -2704,7 +2704,7 @@ static void gen_neon_dup_u8(TCGv var, int shift)
TCGv tmp = new_tmp();
if (shift)
tcg_gen_shri_i32(var, var, shift);
tcg_gen_andi_i32(var, var, 0xff);
tcg_gen_ext8u_i32(var, var);
tcg_gen_shli_i32(tmp, var, 8);
tcg_gen_or_i32(var, var, tmp);
tcg_gen_shli_i32(tmp, var, 16);
@ -2715,7 +2715,7 @@ static void gen_neon_dup_u8(TCGv var, int shift)
static void gen_neon_dup_low16(TCGv var)
{
TCGv tmp = new_tmp();
tcg_gen_andi_i32(var, var, 0xffff);
tcg_gen_ext16u_i32(var, var);
tcg_gen_shli_i32(tmp, var, 16);
tcg_gen_or_i32(var, var, tmp);
dead_tmp(tmp);
@ -5862,7 +5862,7 @@ static void disas_arm_insn(CPUState * env, DisasContext *s)
} else {
/* MOVT */
tmp = load_reg(s, rd);
tcg_gen_andi_i32(tmp, tmp, 0xffff);
tcg_gen_ext16u_i32(tmp, tmp);
tcg_gen_ori_i32(tmp, tmp, val << 16);
}
store_reg(s, rd, tmp);
@ -6378,10 +6378,10 @@ static void disas_arm_insn(CPUState * env, DisasContext *s)
if (insn & (1 << 6)) {
/* pkhtb */
tcg_gen_andi_i32(tmp, tmp, 0xffff0000);
tcg_gen_andi_i32(tmp2, tmp2, 0xffff);
tcg_gen_ext16u_i32(tmp2, tmp2);
} else {
/* pkhbt */
tcg_gen_andi_i32(tmp, tmp, 0xffff);
tcg_gen_ext16u_i32(tmp, tmp);
tcg_gen_andi_i32(tmp2, tmp2, 0xffff0000);
}
tcg_gen_or_i32(tmp, tmp, tmp2);
@ -7700,7 +7700,7 @@ static int disas_thumb2_insn(CPUState *env, DisasContext *s, uint16_t insn_hw1)
if (insn & (1 << 23)) {
/* movt */
tmp = load_reg(s, rd);
tcg_gen_andi_i32(tmp, tmp, 0xffff);
tcg_gen_ext16u_i32(tmp, tmp);
tcg_gen_ori_i32(tmp, tmp, imm << 16);
} else {
/* movw */

5
target-cris/translate.c
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@ -1165,11 +1165,10 @@ static inline void t_gen_sext(TCGv d, TCGv s, int size)
static inline void t_gen_zext(TCGv d, TCGv s, int size)
{
/* TCG-FIXME: this is not optimal. Many archs have fast zext insns. */
if (size == 1)
tcg_gen_andi_i32(d, s, 0xff);
tcg_gen_ext8u_i32(d, s);
else if (size == 2)
tcg_gen_andi_i32(d, s, 0xffff);
tcg_gen_ext16u_i32(d, s);
else
tcg_gen_mov_tl(d, s);
}

5
tcg/README
View File

@ -260,10 +260,13 @@ t0 = t1
Move t1 to t0 (both operands must have the same type).
* ext8s_i32/i64 t0, t1
ext8u_i32/i64 t0, t1
ext16s_i32/i64 t0, t1
ext16u_i32/i64 t0, t1
ext32s_i64 t0, t1
ext32u_i64 t0, t1
8, 16 or 32 bit sign extension (both operands must have the same type)
8, 16 or 32 bit sign/zero extension (both operands must have the same type)
* bswap16_i32 t0, t1

47
tcg/tcg-op.h
View File

@ -980,6 +980,18 @@ static inline void tcg_gen_ext16s_i32(TCGv ret, TCGv arg)
#endif
}
/* These are currently just for convenience.
We assume a target will recognise these automatically . */
static inline void tcg_gen_ext8u_i32(TCGv ret, TCGv arg)
{
tcg_gen_andi_i32(ret, arg, 0xffu);
}
static inline void tcg_gen_ext16u_i32(TCGv ret, TCGv arg)
{
tcg_gen_andi_i32(ret, arg, 0xffffu);
}
/* Note: we assume the two high bytes are set to zero */
static inline void tcg_gen_bswap16_i32(TCGv ret, TCGv arg)
{
@ -1040,6 +1052,24 @@ static inline void tcg_gen_ext32s_i64(TCGv ret, TCGv arg)
tcg_gen_sari_i32(TCGV_HIGH(ret), ret, 31);
}
static inline void tcg_gen_ext8u_i64(TCGv ret, TCGv arg)
{
tcg_gen_ext8u_i32(ret, arg);
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}
static inline void tcg_gen_ext16u_i64(TCGv ret, TCGv arg)
{
tcg_gen_ext16u_i32(ret, arg);
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}
static inline void tcg_gen_ext32u_i64(TCGv ret, TCGv arg)
{
tcg_gen_mov_i32(ret, arg);
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}
static inline void tcg_gen_trunc_i64_i32(TCGv ret, TCGv arg)
{
tcg_gen_mov_i32(ret, arg);
@ -1100,6 +1130,21 @@ static inline void tcg_gen_ext32s_i64(TCGv ret, TCGv arg)
#endif
}
static inline void tcg_gen_ext8u_i64(TCGv ret, TCGv arg)
{
tcg_gen_andi_i64(ret, arg, 0xffu);
}
static inline void tcg_gen_ext16u_i64(TCGv ret, TCGv arg)
{
tcg_gen_andi_i64(ret, arg, 0xffffu);
}
static inline void tcg_gen_ext32u_i64(TCGv ret, TCGv arg)
{
tcg_gen_andi_i64(ret, arg, 0xffffffffu);
}
/* Note: we assume the target supports move between 32 and 64 bit
registers. This will probably break MIPS64 targets. */
static inline void tcg_gen_trunc_i64_i32(TCGv ret, TCGv arg)
@ -1111,7 +1156,7 @@ static inline void tcg_gen_trunc_i64_i32(TCGv ret, TCGv arg)
registers */
static inline void tcg_gen_extu_i32_i64(TCGv ret, TCGv arg)
{
tcg_gen_andi_i64(ret, arg, 0xffffffff);
tcg_gen_andi_i64(ret, arg, 0xffffffffu);
}
/* Note: we assume the target supports move between 32 and 64 bit