Commit 5a4bb580 authored by Richard Henderson's avatar Richard Henderson Committed by Blue Swirl
Browse files

target-sparc: Simplify ICC generation. 



Use int32 types instead of target_ulong when computing ICC.  This
simplifies the generated code for 32-bit host and 64-bit guest.
Use the same simplified expressions for ICC as were already used
for XCC in carry flag generation.

Simplify the ADD carry generation to not consider a possible carry-in.
Use the more complex carry computation for ADDX only.  Use the same
carry algorithm for the XCC result of ADDX.  Similarly for SUB/SUBX.

Use the ADD carry generation functions for TADD/TADDTV.  Similarly
for SUB and TSUB/TSUBTV.

Tidy the code with respect to CODING_STYLE.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarBlue Swirl <blauwirbel@gmail.com>
parent 4c1a0d82

target-sparc/op_helper.c

+140 −80
Original line number Diff line number Diff line
@@ -901,14 +901,15 @@ static uint32_t compute_C_flags(void) 
    return env->psr & PSR_CARRY;

}



static inline uint32_t get_NZ_icc(target_ulong dst)

static inline uint32_t get_NZ_icc(int32_t dst)

{

    uint32_t ret = 0;



    if (!(dst & 0xffffffffULL))

        ret |= PSR_ZERO;

    if ((int32_t) (dst & 0xffffffffULL) < 0)

        ret |= PSR_NEG;

    if (dst == 0) {

        ret = PSR_ZERO;

    } else if (dst < 0) {

        ret = PSR_NEG;

    }

    return ret;

}
@@ -923,14 +924,15 @@ static uint32_t compute_C_flags_xcc(void) 
    return env->xcc & PSR_CARRY;

}



static inline uint32_t get_NZ_xcc(target_ulong dst)

static inline uint32_t get_NZ_xcc(target_long dst)

{

    uint32_t ret = 0;



    if (!dst)

        ret |= PSR_ZERO;

    if ((int64_t)dst < 0)

        ret |= PSR_NEG;

    if (!dst) {

        ret = PSR_ZERO;

    } else if (dst < 0) {

        ret = PSR_NEG;

    }

    return ret;

}

#endif
@@ -939,8 +941,9 @@ static inline uint32_t get_V_div_icc(target_ulong src2) 
{

    uint32_t ret = 0;



    if (src2 != 0)

        ret |= PSR_OVF;

    if (src2 != 0) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -958,26 +961,35 @@ static uint32_t compute_C_div(void) 
    return 0;

}



/* carry = (src1[31] & src2[31]) | ( ~dst[31] & (src1[31] | src2[31])) */

static inline uint32_t get_C_add_icc(target_ulong dst, target_ulong src1,

                                     target_ulong src2)

static inline uint32_t get_C_add_icc(uint32_t dst, uint32_t src1)

{

    uint32_t ret = 0;



    if (((src1 & (1ULL << 31)) & (src2 & (1ULL << 31)))

        | ((~(dst & (1ULL << 31)))

           & ((src1 & (1ULL << 31)) | (src2 & (1ULL << 31)))))

        ret |= PSR_CARRY;

    if (dst < src1) {

        ret = PSR_CARRY;

    }

    return ret;

}



static inline uint32_t get_V_add_icc(target_ulong dst, target_ulong src1,

                                         target_ulong src2)

static inline uint32_t get_C_addx_icc(uint32_t dst, uint32_t src1,

                                      uint32_t src2)

{

    uint32_t ret = 0;



    if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 31))

        ret |= PSR_OVF;

    if (((src1 & src2) | (~dst & (src1 | src2))) & (1U << 31)) {

        ret = PSR_CARRY;

    }

    return ret;

}



static inline uint32_t get_V_add_icc(uint32_t dst, uint32_t src1,

                                     uint32_t src2)

{

    uint32_t ret = 0;



    if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1U << 31)) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -986,8 +998,20 @@ static inline uint32_t get_C_add_xcc(target_ulong dst, target_ulong src1) 
{

    uint32_t ret = 0;



    if (dst < src1)

        ret |= PSR_CARRY;

    if (dst < src1) {

        ret = PSR_CARRY;

    }

    return ret;

}



static inline uint32_t get_C_addx_xcc(target_ulong dst, target_ulong src1,

                                      target_ulong src2)

{

    uint32_t ret = 0;



    if (((src1 & src2) | (~dst & (src1 | src2))) & (1ULL << 63)) {

        ret = PSR_CARRY;

    }

    return ret;

}
@@ -996,8 +1020,9 @@ static inline uint32_t get_V_add_xcc(target_ulong dst, target_ulong src1, 
{

    uint32_t ret = 0;



    if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63))

        ret |= PSR_OVF;

    if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63)) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -1022,14 +1047,14 @@ static uint32_t compute_all_add(void) 
    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_add_icc(CC_DST, CC_SRC);

    ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_add(void)

{

    return get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

    return get_C_add_icc(CC_DST, CC_SRC);

}



#ifdef TARGET_SPARC64
@@ -1038,8 +1063,7 @@ static uint32_t compute_all_addx_xcc(void) 
    uint32_t ret;



    ret = get_NZ_xcc(CC_DST);

    ret |= get_C_add_xcc(CC_DST - CC_SRC2, CC_SRC);

    ret |= get_C_add_xcc(CC_DST, CC_SRC);

    ret |= get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}
@@ -1048,18 +1072,36 @@ static uint32_t compute_C_addx_xcc(void) 
{

    uint32_t ret;



    ret = get_C_add_xcc(CC_DST - CC_SRC2, CC_SRC);

    ret |= get_C_add_xcc(CC_DST, CC_SRC);

    ret = get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}

#endif



static uint32_t compute_all_addx(void)

{

    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_addx(void)

{

    uint32_t ret;



    ret = get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}



static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)

{

    uint32_t ret = 0;



    if ((src1 | src2) & 0x3)

        ret |= PSR_OVF;

    if ((src1 | src2) & 0x3) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -1068,51 +1110,50 @@ static uint32_t compute_all_tadd(void) 
    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_add_icc(CC_DST, CC_SRC);

    ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_tag_icc(CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_tadd(void)

{

    return get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

}



static uint32_t compute_all_taddtv(void)

{

    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_add_icc(CC_DST, CC_SRC);

    return ret;

}



static uint32_t compute_C_taddtv(void)

static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)

{

    return get_C_add_icc(CC_DST, CC_SRC, CC_SRC2);

    uint32_t ret = 0;



    if (src1 < src2) {

        ret = PSR_CARRY;

    }

    return ret;

}



/* carry = (~src1[31] & src2[31]) | ( dst[31]  & (~src1[31] | src2[31])) */

static inline uint32_t get_C_sub_icc(target_ulong dst, target_ulong src1,

                                     target_ulong src2)

static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,

                                      uint32_t src2)

{

    uint32_t ret = 0;



    if (((~(src1 & (1ULL << 31))) & (src2 & (1ULL << 31)))

        | ((dst & (1ULL << 31)) & (( ~(src1 & (1ULL << 31)))

                                   | (src2 & (1ULL << 31)))))

        ret |= PSR_CARRY;

    if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {

        ret = PSR_CARRY;

    }

    return ret;

}



static inline uint32_t get_V_sub_icc(target_ulong dst, target_ulong src1,

                                     target_ulong src2)

static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,

                                     uint32_t src2)

{

    uint32_t ret = 0;



    if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 31))

        ret |= PSR_OVF;

    if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -1122,8 +1163,20 @@ static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2) 
{

    uint32_t ret = 0;



    if (src1 < src2)

        ret |= PSR_CARRY;

    if (src1 < src2) {

        ret = PSR_CARRY;

    }

    return ret;

}



static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,

                                      target_ulong src2)

{

    uint32_t ret = 0;



    if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {

        ret = PSR_CARRY;

    }

    return ret;

}
@@ -1132,8 +1185,9 @@ static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1, 
{

    uint32_t ret = 0;



    if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63))

        ret |= PSR_OVF;

    if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {

        ret = PSR_OVF;

    }

    return ret;

}
@@ -1158,14 +1212,14 @@ static uint32_t compute_all_sub(void) 
    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_sub_icc(CC_SRC, CC_SRC2);

    ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_sub(void)

{

    return get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    return get_C_sub_icc(CC_SRC, CC_SRC2);

}



#ifdef TARGET_SPARC64
@@ -1174,8 +1228,7 @@ static uint32_t compute_all_subx_xcc(void) 
    uint32_t ret;



    ret = get_NZ_xcc(CC_DST);

    ret |= get_C_sub_xcc(CC_DST - CC_SRC2, CC_SRC);

    ret |= get_C_sub_xcc(CC_DST, CC_SRC2);

    ret |= get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}
@@ -1184,40 +1237,47 @@ static uint32_t compute_C_subx_xcc(void) 
{

    uint32_t ret;



    ret = get_C_sub_xcc(CC_DST - CC_SRC2, CC_SRC);

    ret |= get_C_sub_xcc(CC_DST, CC_SRC2);

    ret = get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}

#endif



static uint32_t compute_all_tsub(void)

static uint32_t compute_all_subx(void)

{

    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_tag_icc(CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_tsub(void)

static uint32_t compute_C_subx(void)

{

    return get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    uint32_t ret;



    ret = get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_all_tsubtv(void)

static uint32_t compute_all_tsub(void)

{

    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_C_sub_icc(CC_SRC, CC_SRC2);

    ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    ret |= get_V_tag_icc(CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_C_tsubtv(void)

static uint32_t compute_all_tsubtv(void)

{

    return get_C_sub_icc(CC_DST, CC_SRC, CC_SRC2);

    uint32_t ret;



    ret = get_NZ_icc(CC_DST);

    ret |= get_C_sub_icc(CC_SRC, CC_SRC2);

    return ret;

}



static uint32_t compute_all_logic(void)
@@ -1247,13 +1307,13 @@ static const CCTable icc_table[CC_OP_NB] = { 
    [CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },

    [CC_OP_DIV] = { compute_all_div, compute_C_div },

    [CC_OP_ADD] = { compute_all_add, compute_C_add },

    [CC_OP_ADDX] = { compute_all_add, compute_C_add },

    [CC_OP_TADD] = { compute_all_tadd, compute_C_tadd },

    [CC_OP_TADDTV] = { compute_all_taddtv, compute_C_taddtv },

    [CC_OP_ADDX] = { compute_all_addx, compute_C_addx },

    [CC_OP_TADD] = { compute_all_tadd, compute_C_add },

    [CC_OP_TADDTV] = { compute_all_taddtv, compute_C_add },

    [CC_OP_SUB] = { compute_all_sub, compute_C_sub },

    [CC_OP_SUBX] = { compute_all_sub, compute_C_sub },

    [CC_OP_TSUB] = { compute_all_tsub, compute_C_tsub },

    [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_tsubtv },

    [CC_OP_SUBX] = { compute_all_subx, compute_C_subx },

    [CC_OP_TSUB] = { compute_all_tsub, compute_C_sub },

    [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },

    [CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },

};