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authorMatthew Gretton-Dann <matthew.gretton-dann@arm.com>2010-09-23 15:37:45 +0000
committerMatthew Gretton-Dann <matthew.gretton-dann@arm.com>2010-09-23 15:37:45 +0000
commiteea54501f730cf7697d5bce04f634c95a236bfdd (patch)
tree596566d320432d70f014c8a28de1b995efd5d677 /gas/config/tc-arm.c
parentb2a5fbdc946c0b4a0032f4d9f8cf23d87f5a2dd6 (diff)
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* gas/config/tc-arm.c (arm_ext_adiv): New variable.
(do_div): New function. (insns): Accept UDIV and SDIV in ARM state. (arm_cpus): The cortex-a15 option has all current v7-A extensions. (arm_extensions): Add 'idiv' extension. (aeabi_set_public_attributes): Update Tag_DIV_use values for the Integer Divide extension. * gas/doc/c-arm.texi: Document the idiv extension. * gas/testsuite/gas/arm/armv7-a+idiv.d: New test. * gas/testsuite/gas/arm/armv7-a+idiv.s: Likewise. * gas/testsuite/gas/arm/attr-march-all.d: Update for Integer divide extension. * gas/testsuite/gas/arm/attr-march-armv7-a+idiv.d: New test. * include/opcode/arm.h (ARM_AEXT_ADIV): New define. (ARM_ARCH_V7A_IDIV_MP_SEC): Likewise. * opcodes/arm-dis.c (arm_opcodes): Support disassembly of UDIV and SDIV in ARM state.
Diffstat (limited to 'gas/config/tc-arm.c')
-rw-r--r--gas/config/tc-arm.c41
1 files changed, 32 insertions, 9 deletions
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 76013ed..886d92f 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -200,6 +200,7 @@ static const arm_feature_set arm_ext_m =
static const arm_feature_set arm_ext_mp = ARM_FEATURE (ARM_EXT_MP, 0);
static const arm_feature_set arm_ext_sec = ARM_FEATURE (ARM_EXT_SEC, 0);
static const arm_feature_set arm_ext_os = ARM_FEATURE (ARM_EXT_OS, 0);
+static const arm_feature_set arm_ext_adiv = ARM_FEATURE (ARM_EXT_ADIV, 0);
static const arm_feature_set arm_arch_any = ARM_ANY;
static const arm_feature_set arm_arch_full = ARM_FEATURE (-1, -1);
@@ -7492,6 +7493,25 @@ do_dbg (void)
}
static void
+do_div (void)
+{
+ unsigned Rd, Rn, Rm;
+
+ Rd = inst.operands[0].reg;
+ Rn = (inst.operands[1].present
+ ? inst.operands[1].reg : Rd);
+ Rm = inst.operands[2].reg;
+
+ constraint ((Rd == REG_PC), BAD_PC);
+ constraint ((Rn == REG_PC), BAD_PC);
+ constraint ((Rm == REG_PC), BAD_PC);
+
+ inst.instruction |= Rd << 16;
+ inst.instruction |= Rn << 0;
+ inst.instruction |= Rm << 8;
+}
+
+static void
do_it (void)
{
/* There is no IT instruction in ARM mode. We
@@ -17130,12 +17150,14 @@ static const struct asm_opcode insns[] =
TCE("tbb", 0, e8d0f000, 1, (TB), 0, t_tb),
TCE("tbh", 0, e8d0f010, 1, (TB), 0, t_tb),
- /* Thumb-2 hardware division instructions (R and M profiles only). */
+ /* Hardware division instructions. */
+#undef ARM_VARIANT
+#define ARM_VARIANT & arm_ext_adiv
#undef THUMB_VARIANT
#define THUMB_VARIANT & arm_ext_div
- TCE("sdiv", 0, fb90f0f0, 3, (RR, oRR, RR), 0, t_div),
- TCE("udiv", 0, fbb0f0f0, 3, (RR, oRR, RR), 0, t_div),
+ TCE("sdiv", 710f010, fb90f0f0, 3, (RR, oRR, RR), div, t_div),
+ TCE("udiv", 730f010, fbb0f0f0, 3, (RR, oRR, RR), div, t_div),
/* ARM V6M/V7 instructions. */
#undef ARM_VARIANT
@@ -22408,8 +22430,8 @@ static const struct arm_cpu_option_table arm_cpus[] =
ARM_FEATURE (0, FPU_VFP_V3
| FPU_NEON_EXT_V1),
"Cortex-A9"},
- {"cortex-a15", ARM_ARCH_V7A_MP_SEC,
- FPU_ARCH_NEON_VFP_V4,
+ {"cortex-a15", ARM_ARCH_V7A_IDIV_MP_SEC,
+ FPU_ARCH_NEON_VFP_V4,
"Cortex-A15"},
{"cortex-r4", ARM_ARCH_V7R, FPU_NONE, "Cortex-R4"},
{"cortex-r4f", ARM_ARCH_V7R, FPU_ARCH_VFP_V3D16,
@@ -22496,6 +22518,8 @@ struct arm_option_extension_value_table
*/
static const struct arm_option_extension_value_table arm_extensions[] =
{
+ {"idiv", ARM_FEATURE (ARM_EXT_ADIV | ARM_EXT_DIV, 0),
+ ARM_FEATURE (ARM_EXT_V7A, 0)},
{"iwmmxt", ARM_FEATURE (0, ARM_CEXT_IWMMXT), ARM_ANY},
{"iwmmxt2", ARM_FEATURE (0, ARM_CEXT_IWMMXT2), ARM_ANY},
{"maverick", ARM_FEATURE (0, ARM_CEXT_MAVERICK), ARM_ANY},
@@ -23177,11 +23201,10 @@ aeabi_set_public_attributes (void)
aeabi_set_attribute_int (Tag_VFP_HP_extension, 1);
/* Tag_DIV_use. */
- if (ARM_CPU_HAS_FEATURE (flags, arm_ext_div))
+ if (ARM_CPU_HAS_FEATURE (flags, arm_ext_adiv))
+ aeabi_set_attribute_int (Tag_DIV_use, 2);
+ else if (ARM_CPU_HAS_FEATURE (flags, arm_ext_div))
aeabi_set_attribute_int (Tag_DIV_use, 0);
- /* Fill this in when gas supports v7a sdiv/udiv.
- else if (... v7a with div extension used ...)
- aeabi_set_attribute_int (Tag_DIV_use, 2); */
else
aeabi_set_attribute_int (Tag_DIV_use, 1);