diff options
| author | Paul Brook <paul@codesourcery.com> | 2008-03-13 00:39:34 +0000 |
|---|---|---|
| committer | Paul Brook <pbrook@gcc.gnu.org> | 2008-03-13 00:39:34 +0000 |
| commit | 5dea0c1939a51ebb53cab4466bd49f3f828f740d (patch) | |
| tree | 938b992f5cf90bf9866fe475964fb05480b1b276 /gcc | |
| parent | e066eba77476b4a40cdfd232617c2397dedf0bb1 (diff) | |
| download | gcc-5dea0c1939a51ebb53cab4466bd49f3f828f740d.zip gcc-5dea0c1939a51ebb53cab4466bd49f3f828f740d.tar.gz gcc-5dea0c1939a51ebb53cab4466bd49f3f828f740d.tar.bz2 | |
arm.c (output_move_double): Prefer LDRD to LDM.
2008-03-12 Paul Brook <paul@codesourcery.com>
gcc/
* config/arm/arm.c (output_move_double): Prefer LDRD to LDM.
From-SVN: r133160
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/arm/arm.c | 35 |
2 files changed, 32 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 94d21b5..d64295d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2008-03-12 Paul Brook <paul@codesourcery.com> + * config/arm/arm.c (output_move_double): Prefer LDRD to LDM. + +2008-03-12 Paul Brook <paul@codesourcery.com> + * config/arm/thumb2.md: Extend peephole to cover 3-arg subs. (thumb2_alusi3_short): Exclude PLUS and MINUS. (thumb2_addsi_shortim): Rename ... diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 5f92e46..f3febf6 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -9869,7 +9869,10 @@ output_move_double (rtx *operands) switch (GET_CODE (XEXP (operands[1], 0))) { case REG: - output_asm_insn ("ldm%(ia%)\t%m1, %M0", operands); + if (TARGET_LDRD) + output_asm_insn ("ldr%(d%)\t%0, [%m1]", operands); + else + output_asm_insn ("ldm%(ia%)\t%m1, %M0", operands); break; case PRE_INC: @@ -9885,7 +9888,10 @@ output_move_double (rtx *operands) break; case POST_INC: - output_asm_insn ("ldm%(ia%)\t%m1!, %M0", operands); + if (TARGET_LDRD) + output_asm_insn ("ldr%(d%)\t%0, [%m1], #8", operands); + else + output_asm_insn ("ldm%(ia%)\t%m1!, %M0", operands); break; case POST_DEC: @@ -9944,8 +9950,14 @@ output_move_double (rtx *operands) case LABEL_REF: case CONST: + /* We might be able to use ldrd %0, %1 here. However the range is + different to ldr/adr, and it is broken on some ARMv7-M + implementations. */ output_asm_insn ("adr%?\t%0, %1", operands); - output_asm_insn ("ldm%(ia%)\t%0, %M0", operands); + if (TARGET_LDRD) + output_asm_insn ("ldr%(d%)\t%0, [%0]", operands); + else + output_asm_insn ("ldm%(ia%)\t%0, %M0", operands); break; /* ??? This needs checking for thumb2. */ @@ -9959,7 +9971,7 @@ output_move_double (rtx *operands) if (GET_CODE (XEXP (operands[1], 0)) == PLUS) { - if (GET_CODE (otherops[2]) == CONST_INT) + if (GET_CODE (otherops[2]) == CONST_INT && !TARGET_LDRD) { switch ((int) INTVAL (otherops[2])) { @@ -10018,6 +10030,9 @@ output_move_double (rtx *operands) else output_asm_insn ("sub%?\t%0, %1, %2", otherops); + if (TARGET_LDRD) + return "ldr%(d%)\t%0, [%0]"; + return "ldm%(ia%)\t%0, %M0"; } else @@ -10046,7 +10061,10 @@ output_move_double (rtx *operands) switch (GET_CODE (XEXP (operands[0], 0))) { case REG: - output_asm_insn ("stm%(ia%)\t%m0, %M1", operands); + if (TARGET_LDRD) + output_asm_insn ("str%(d%)\t%1, [%m0]", operands); + else + output_asm_insn ("stm%(ia%)\t%m0, %M1", operands); break; case PRE_INC: @@ -10062,7 +10080,10 @@ output_move_double (rtx *operands) break; case POST_INC: - output_asm_insn ("stm%(ia%)\t%m0!, %M1", operands); + if (TARGET_LDRD) + output_asm_insn ("str%(d%)\t%1, [%m0], #8", operands); + else + output_asm_insn ("stm%(ia%)\t%m0!, %M1", operands); break; case POST_DEC: @@ -10106,7 +10127,7 @@ output_move_double (rtx *operands) case PLUS: otherops[2] = XEXP (XEXP (operands[0], 0), 1); - if (GET_CODE (otherops[2]) == CONST_INT) + if (GET_CODE (otherops[2]) == CONST_INT && !TARGET_LDRD) { switch ((int) INTVAL (XEXP (XEXP (operands[0], 0), 1))) { |