diff options
Diffstat (limited to 'gcc/gcc-3.3.4/arm-ldm.dpatch')
| -rw-r--r-- | gcc/gcc-3.3.4/arm-ldm.dpatch | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/gcc/gcc-3.3.4/arm-ldm.dpatch b/gcc/gcc-3.3.4/arm-ldm.dpatch deleted file mode 100644 index 561624f39c..0000000000 --- a/gcc/gcc-3.3.4/arm-ldm.dpatch +++ /dev/null @@ -1,148 +0,0 @@ -#! /bin/sh -e - -src=gcc -if [ $# -eq 3 -a "$2" = '-d' ]; then - pdir="-d $3" - src=$3/gcc -elif [ $# -ne 1 ]; then - echo >&2 "`basename $0`: script expects -patch|-unpatch as argument" - exit 1 -fi -case "$1" in - -patch) - patch $pdir -f --no-backup-if-mismatch -p0 --fuzz 10 < $0 - ;; - -unpatch) - patch $pdir -f --no-backup-if-mismatch -R -p0 --fuzz 10 < $0 - ;; - *) - echo >&2 "`basename $0`: script expects -patch|-unpatch as argument" - exit 1 -esac -exit 0 - -# DP: try harder to avoid ldm in function epilogues - ---- gcc/config/arm/arm.c Fri Mar 5 18:49:42 2004 -+++ gcc/config/arm/arm.c Fri Mar 5 16:00:21 2004 -@@ -7598,6 +7629,26 @@ - return_used_this_function = 0; - } - -+/* Return the number (counting from 0) of -+ the least significant set bit in MASK. */ -+ -+#ifdef __GNUC__ -+inline -+#endif -+static int -+number_of_first_bit_set (mask) -+ int mask; -+{ -+ int bit; -+ -+ for (bit = 0; -+ (mask & (1 << bit)) == 0; -+ ++bit) -+ continue; -+ -+ return bit; -+} -+ - const char * - arm_output_epilogue (really_return) - int really_return; -@@ -7788,27 +7839,47 @@ - saved_regs_mask |= (1 << PC_REGNUM); - } - -- /* Load the registers off the stack. If we only have one register -- to load use the LDR instruction - it is faster. */ -- if (saved_regs_mask == (1 << LR_REGNUM)) -- { -- /* The exception handler ignores the LR, so we do -- not really need to load it off the stack. */ -- if (eh_ofs) -- asm_fprintf (f, "\tadd\t%r, %r, #4\n", SP_REGNUM, SP_REGNUM); -- else -- asm_fprintf (f, "\tldr\t%r, [%r], #4\n", LR_REGNUM, SP_REGNUM); -- } -- else if (saved_regs_mask) -+ if (saved_regs_mask) - { -- if (saved_regs_mask & (1 << SP_REGNUM)) -- /* Note - write back to the stack register is not enabled -- (ie "ldmfd sp!..."). We know that the stack pointer is -- in the list of registers and if we add writeback the -- instruction becomes UNPREDICTABLE. */ -- print_multi_reg (f, "ldmfd\t%r", SP_REGNUM, saved_regs_mask); -+ /* Load the registers off the stack. If we only have one register -+ to load use the LDR instruction - it is faster. */ -+ if (bit_count (saved_regs_mask) == 1) -+ { -+ int reg = number_of_first_bit_set (saved_regs_mask); -+ -+ switch (reg) -+ { -+ case SP_REGNUM: -+ /* Mustn't use base writeback when loading SP. */ -+ asm_fprintf (f, "\tldr\t%r, [%r]\n", SP_REGNUM, SP_REGNUM); -+ break; -+ -+ case LR_REGNUM: -+ if (eh_ofs) -+ { -+ /* The exception handler ignores the LR, so we do -+ not really need to load it off the stack. */ -+ asm_fprintf (f, "\tadd\t%r, %r, #4\n", SP_REGNUM, SP_REGNUM); -+ break; -+ } -+ /* else fall through */ -+ -+ default: -+ asm_fprintf (f, "\tldr\t%r, [%r], #4\n", reg, SP_REGNUM); -+ break; -+ } -+ } - else -- print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask); -+ { -+ if (saved_regs_mask & (1 << SP_REGNUM)) -+ /* Note - write back to the stack register is not enabled -+ (ie "ldmfd sp!..."). We know that the stack pointer is -+ in the list of registers and if we add writeback the -+ instruction becomes UNPREDICTABLE. */ -+ print_multi_reg (f, "ldmfd\t%r", SP_REGNUM, saved_regs_mask); -+ else -+ print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask); -+ } - } - - if (current_function_pretend_args_size) -@@ -9610,26 +9677,6 @@ - } - } - --/* Return the number (counting from 0) of -- the least significant set bit in MASK. */ -- --#ifdef __GNUC__ --inline --#endif --static int --number_of_first_bit_set (mask) -- int mask; --{ -- int bit; -- -- for (bit = 0; -- (mask & (1 << bit)) == 0; -- ++bit) -- continue; -- -- return bit; --} -- - /* Generate code to return from a thumb function. - If 'reg_containing_return_addr' is -1, then the return address is - actually on the stack, at the stack pointer. */ |