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target-sparc: Implement fpack{16,32,fix}. 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2011-10-17 18:03:47 -07:00
parent f888300b81
commit 2dedf31497
3 changed files with 96 additions and 1 deletions
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3
target-sparc/helper.h
View File

@ -138,6 +138,9 @@ DEF_HELPER_FLAGS_2(fmuld8sux16, TCG_CALL_CONST | TCG_CALL_PURE, i64, i64, i64)
DEF_HELPER_FLAGS_2(fmuld8ulx16, TCG_CALL_CONST | TCG_CALL_PURE, i64, i64, i64)
DEF_HELPER_FLAGS_2(fexpand, TCG_CALL_CONST | TCG_CALL_PURE, i64, i64, i64)
DEF_HELPER_FLAGS_3(pdist, TCG_CALL_CONST | TCG_CALL_PURE, i64, i64, i64, i64)
DEF_HELPER_FLAGS_2(fpack16, TCG_CALL_CONST | TCG_CALL_PURE, i32, i64, i64)
DEF_HELPER_FLAGS_3(fpack32, TCG_CALL_CONST | TCG_CALL_PURE, i64, i64, i64, i64)
DEF_HELPER_FLAGS_2(fpackfix, TCG_CALL_CONST | TCG_CALL_PURE, i32, i64, i64)
#define VIS_HELPER(name) \
DEF_HELPER_FLAGS_2(f ## name ## 16, TCG_CALL_CONST | TCG_CALL_PURE, \
i64, i64, i64) \

30
target-sparc/translate.c
View File

@ -1739,6 +1739,20 @@ static inline void gen_ne_fop_DDD(DisasContext *dc, int rd, int rs1, int rs2,
gen_store_fpr_D(dc, rd, dst);
}
static inline void gen_gsr_fop_DDD(DisasContext *dc, int rd, int rs1, int rs2,
void (*gen)(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_i64))
{
TCGv_i64 dst, src1, src2;
src1 = gen_load_fpr_D(dc, rs1);
src2 = gen_load_fpr_D(dc, rs2);
dst = gen_dest_fpr_D();
gen(dst, cpu_gsr, src1, src2);
gen_store_fpr_D(dc, rd, dst);
}
static inline void gen_ne_fop_DDDD(DisasContext *dc, int rd, int rs1, int rs2,
void (*gen)(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_i64))
{
@ -4072,9 +4086,23 @@ static void disas_sparc_insn(DisasContext * dc)
gen_ne_fop_DDD(dc, rd, rs1, rs2, gen_helper_fmuld8ulx16);
break;
case 0x03a: /* VIS I fpack32 */
CHECK_FPU_FEATURE(dc, VIS1);
gen_gsr_fop_DDD(dc, rd, rs1, rs2, gen_helper_fpack32);
break;
case 0x03b: /* VIS I fpack16 */
CHECK_FPU_FEATURE(dc, VIS1);
cpu_src1_64 = gen_load_fpr_D(dc, rs2);
cpu_dst_32 = gen_dest_fpr_F();
gen_helper_fpack16(cpu_dst_32, cpu_gsr, cpu_src1_64);
gen_store_fpr_F(dc, rd, cpu_dst_32);
break;
case 0x03d: /* VIS I fpackfix */
goto illegal_insn;
CHECK_FPU_FEATURE(dc, VIS1);
cpu_src1_64 = gen_load_fpr_D(dc, rs2);
cpu_dst_32 = gen_dest_fpr_F();
gen_helper_fpackfix(cpu_dst_32, cpu_gsr, cpu_src1_64);
gen_store_fpr_F(dc, rd, cpu_dst_32);
break;
case 0x03e: /* VIS I pdist */
CHECK_FPU_FEATURE(dc, VIS1);
gen_ne_fop_DDDD(dc, rd, rs1, rs2, gen_helper_pdist);

64
target-sparc/vis_helper.c
View File

@ -417,3 +417,67 @@ uint64_t helper_pdist(uint64_t sum, uint64_t src1, uint64_t src2)
return sum;
}
uint32_t helper_fpack16(uint64_t gsr, uint64_t rs2)
{
int scale = (gsr >> 3) & 0xf;
uint32_t ret = 0;
int byte;
for (byte = 0; byte < 4; byte++) {
uint32_t val;
int16_t src = rs2 >> (byte * 16);
int32_t scaled = src << scale;
int32_t from_fixed = scaled >> 7;
val = (from_fixed < 0 ? 0 :
from_fixed > 255 ? 255 : from_fixed);
ret |= val << (8 * byte);
}
return ret;
}
uint64_t helper_fpack32(uint64_t gsr, uint64_t rs1, uint64_t rs2)
{
int scale = (gsr >> 3) & 0x1f;
uint64_t ret = 0;
int word;
ret = (rs1 << 8) & ~(0x000000ff000000ffULL);
for (word = 0; word < 2; word++) {
uint64_t val;
int32_t src = rs2 >> (word * 32);
int64_t scaled = (int64_t)src << scale;
int64_t from_fixed = scaled >> 23;
val = (from_fixed < 0 ? 0 :
(from_fixed > 255) ? 255 : from_fixed);
ret |= val << (32 * word);
}
return ret;
}
uint32_t helper_fpackfix(uint64_t gsr, uint64_t rs2)
{
int scale = (gsr >> 3) & 0x1f;
uint32_t ret = 0;
int word;
for (word = 0; word < 2; word++) {
uint32_t val;
int32_t src = rs2 >> (word * 32);
int64_t scaled = src << scale;
int64_t from_fixed = scaled >> 16;
val = (from_fixed < -32768 ? -32768 :
from_fixed > 32767 ? 32767 : from_fixed);
ret |= (val & 0xffff) << (word * 16);
}
return ret;
}