diff options
Diffstat (limited to 'gcc/config/m68k/m68k.c')
| -rw-r--r-- | gcc/config/m68k/m68k.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index 69a62a6..89af89e 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -1470,7 +1470,7 @@ legitimize_pic_address (rtx orig, enum machine_mode mode ATTRIBUTE_UNUSED, } -typedef enum { MOVL, SWAP, NEGW, NOTW, NOTB, MOVQ } CONST_METHOD; +typedef enum { MOVL, SWAP, NEGW, NOTW, NOTB, MOVQ, MVS, MVZ } CONST_METHOD; static CONST_METHOD const_method (rtx); @@ -1505,6 +1505,16 @@ const_method (rtx constant) if (USE_MOVQ ((u >> 16) | (u << 16))) return SWAP; } + + if (TARGET_CFV4) + { + /* Try using MVZ/MVS with an immedaite value to load constants. */ + if (i >= 0 && i <= 65535) + return MVZ; + if (i >= -32768 && i <= 32767) + return MVS; + } + /* Otherwise, use move.l */ return MOVL; } @@ -1517,6 +1527,8 @@ const_int_cost (rtx constant) case MOVQ : /* Constants between -128 and 127 are cheap due to moveq */ return 0; + case MVZ: + case MVS: case NOTB : case NOTW : case NEGW : @@ -1661,6 +1673,10 @@ output_move_const_into_data_reg (rtx *operands) i = INTVAL (operands[1]); switch (const_method (operands[1])) { + case MVZ: + return "mvsw %1,%0"; + case MVS: + return "mvzw %1,%0"; case MOVQ : return "moveq %1,%0"; case NOTB : |