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| author | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-09-08 16:54:17 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-09-08 16:54:17 -0700 |
| commit | 86c33bb08ca211a04b95569e01ffca5a6744bce4 (patch) | |
| tree | 67bae409dbd5d414912a077fa2f2d8933a337e3b /gcc | |
| parent | c6cf7fdb586b9875ca42242b5f45270f3371605f (diff) | |
| download | riscv-gnu-toolchain-86c33bb08ca211a04b95569e01ffca5a6744bce4.zip riscv-gnu-toolchain-86c33bb08ca211a04b95569e01ffca5a6744bce4.tar.gz riscv-gnu-toolchain-86c33bb08ca211a04b95569e01ffca5a6744bce4.tar.bz2 | |
gcc: use LI, not MV, to zero a GPR
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gcc/config/riscv/riscv.c | 59 |
1 files changed, 28 insertions, 31 deletions
diff --git a/gcc/gcc/config/riscv/riscv.c b/gcc/gcc/config/riscv/riscv.c index bf27a18..4bd9803 100644 --- a/gcc/gcc/config/riscv/riscv.c +++ b/gcc/gcc/config/riscv/riscv.c @@ -1756,6 +1756,34 @@ riscv_output_move (rtx dest, rtx src) if (dbl_p && riscv_split_64bit_move_p (dest, src)) return "#"; + if (dest_code == REG && GP_REG_P (REGNO (dest))) + { + if (src_code == REG && FP_REG_P (REGNO (src))) + return dbl_p ? "fmv.x.d\t%0,%1" : "fmv.x.s\t%0,%1"; + + if (src_code == MEM) + switch (GET_MODE_SIZE (mode)) + { + case 1: return "lbu\t%0,%1"; + case 2: return "lhu\t%0,%1"; + case 4: return "lw\t%0,%1"; + case 8: return "ld\t%0,%1"; + } + + if (src_code == CONST_INT) + return "li\t%0,%1"; + + if (src_code == HIGH) + return "lui\t%0,%h1"; + + if (symbolic_operand (src, VOIDmode)) + switch (riscv_classify_symbolic_expression (src)) + { + case SYMBOL_GOT_DISP: return "la\t%0,%1"; + case SYMBOL_ABSOLUTE: return "lla\t%0,%1"; + default: gcc_unreachable(); + } + } if ((src_code == REG && GP_REG_P (REGNO (src))) || (src == CONST0_RTX (mode))) { @@ -1784,37 +1812,6 @@ riscv_output_move (rtx dest, rtx src) case 8: return "sd\t%z1,%0"; } } - if (dest_code == REG && GP_REG_P (REGNO (dest))) - { - if (src_code == REG) - { - if (FP_REG_P (REGNO (src))) - return dbl_p ? "fmv.x.d\t%0,%1" : "fmv.x.s\t%0,%1"; - } - - if (src_code == MEM) - switch (GET_MODE_SIZE (mode)) - { - case 1: return "lbu\t%0,%1"; - case 2: return "lhu\t%0,%1"; - case 4: return "lw\t%0,%1"; - case 8: return "ld\t%0,%1"; - } - - if (src_code == CONST_INT) - return "li\t%0,%1"; - - if (src_code == HIGH) - return "lui\t%0,%h1"; - - if (symbolic_operand (src, VOIDmode)) - switch (riscv_classify_symbolic_expression (src)) - { - case SYMBOL_GOT_DISP: return "la\t%0,%1"; - case SYMBOL_ABSOLUTE: return "lla\t%0,%1"; - default: gcc_unreachable(); - } - } if (src_code == REG && FP_REG_P (REGNO (src))) { if (dest_code == REG && FP_REG_P (REGNO (dest))) |