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author | Sebastian Perta <sebastian.perta@renesas.com> | 2018-01-26 10:55:31 +0000 |
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committer | Sebastian Perta <sebastianperta@gcc.gnu.org> | 2018-01-26 10:55:31 +0000 |
commit | b0679a787b46149408363a697afb2279e22504ad (patch) | |
tree | f79b160b8d141e0ba10c3b814bde07a1fed992ab /gcc/config/rl78 | |
parent | 0547173960db190acc75e7017bf8d2e89706a5ee (diff) | |
download | gcc-b0679a787b46149408363a697afb2279e22504ad.zip gcc-b0679a787b46149408363a697afb2279e22504ad.tar.gz gcc-b0679a787b46149408363a697afb2279e22504ad.tar.bz2 |
rl78.c: if operand 2 is const avoid addition with 0 and use incw and decw where possible
2018-01-25 Sebastian Perta <sebastian.perta@renesas.com>
* config/rl78/rl78.c: if operand 2 is const avoid addition with 0
and use incw and decw where possible
* testsuite/gcc.target/rl78/test_addsi3_internal.c: new file
From-SVN: r257079
Diffstat (limited to 'gcc/config/rl78')
-rw-r--r-- | gcc/config/rl78/rl78.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/gcc/config/rl78/rl78.c b/gcc/config/rl78/rl78.c index 6f2551c..b8c1e7b 100644 --- a/gcc/config/rl78/rl78.c +++ b/gcc/config/rl78/rl78.c @@ -80,6 +80,9 @@ static const char * const word_regnames[] = "sp", "ap", "psw", "es", "cs" }; +/* used by rl78_addsi3_internal for formatting insns output */ +static char fmt_buffer[1024]; + /* Structure for G13 MDUC registers. */ struct mduc_reg_type { @@ -4788,6 +4791,8 @@ rl78_flags_already_set (rtx op, rtx operand) const char * rl78_addsi3_internal (rtx * operands, unsigned int alternative) { + const char *addH2 = "addw ax, %H2\n\t"; + /* If we are adding in a constant symbolic address when -mes0 is active then we know that the address must be <64K and that it is invalid to access anything above 64K relative to @@ -4799,16 +4804,38 @@ rl78_addsi3_internal (rtx * operands, unsigned int alternative) && ! TREE_SIDE_EFFECTS (SYMBOL_REF_DECL (operands[2]))) return "movw ax, %h1\n\taddw ax, %h2\n\tmovw %h0, ax"; + if(CONST_INT_P(operands[2])) + { + if((INTVAL(operands[2]) & 0xFFFF0000) == 0) + { + addH2 = ""; + } + else if((INTVAL(operands[2]) & 0xFFFF0000) == 0x00010000) + { + addH2 = "incw ax\n\t"; + } + else if((INTVAL(operands[2]) & 0xFFFF0000) == 0xFFFF0000) + { + addH2 = "decw ax\n\t"; + } + } + switch (alternative) { case 0: case 1: - return "movw ax, %h1\n\taddw ax, %h2\n\tmovw %h0, ax\n\tmovw ax, %H1\n\tsknc\n\tincw ax\n\taddw ax, %H2\n\tmovw %H0, ax"; + snprintf(fmt_buffer, sizeof(fmt_buffer), + "movw ax, %%h1\n\taddw ax, %%h2\n\tmovw %%h0, ax\n\tmovw ax, %%H1\n\tsknc\n\tincw ax\n\t%smovw %%H0,ax", addH2); + break; case 2: - return "movw ax, %h1\n\taddw ax,%h2\n\tmovw bc, ax\n\tmovw ax, %H1\n\tsknc\n\tincw ax\n\taddw ax, %H2\n\tmovw %H0, ax\n\tmovw ax, bc\n\tmovw %h0, ax"; + snprintf(fmt_buffer, sizeof(fmt_buffer), + "movw ax, %%h1\n\taddw ax, %%h2\n\tmovw bc, ax\n\tmovw ax, %%H1\n\tsknc\n\tincw ax\n\t%smovw %%H0, ax\n\tmovw ax, bc\n\tmovw %%h0, ax", addH2); + break; default: gcc_unreachable (); } + + return fmt_buffer; } rtx |