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arm: default to softvfp on armv6 or later cores

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From armv6 onwards a lot of cores started to come with a physical VFP
implementation; but many still did not and in some cases there are
both variants.  For the cores that lacked a physical VFP we would fall
back to FPU_NONE if the platform/ABI did not mandate something else.
To make matters worse, FPU_NONE is internal state used to imply
soft-fpa (ie a mixed-endian double format), so any use of .double in
hand-written assembly is almost certainly generating incorrect output.

That's undesirable, all these cores should really default to a softvfp
model.
This commit is contained in:
Richard Earnshaw 2024-06-04 12:56:20 +01:00
parent 51c2c0f62b
commit d3a79e2833
1 changed files with 17 additions and 17 deletions
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34
gas/config/tc-arm.c
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@ -31458,10 +31458,10 @@ static const struct arm_cpu_option_table arm_cpus[] =
FPU_ARCH_VFP_V2),
ARM_CPU_OPT ("arm1136js", "ARM1136J-S", ARM_ARCH_V6,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("arm1136j-s", NULL, ARM_ARCH_V6,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("arm1136jfs", "ARM1136JF-S", ARM_ARCH_V6,
ARM_ARCH_NONE,
FPU_ARCH_VFP_V2),
@ -31473,22 +31473,22 @@ static const struct arm_cpu_option_table arm_cpus[] =
FPU_ARCH_VFP_V2),
ARM_CPU_OPT ("mpcorenovfp", "MPCore", ARM_ARCH_V6K,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("arm1156t2-s", NULL, ARM_ARCH_V6T2,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("arm1156t2f-s", NULL, ARM_ARCH_V6T2,
ARM_ARCH_NONE,
FPU_ARCH_VFP_V2),
ARM_CPU_OPT ("arm1176jz-s", NULL, ARM_ARCH_V6KZ,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("arm1176jzf-s", NULL, ARM_ARCH_V6KZ,
ARM_ARCH_NONE,
FPU_ARCH_VFP_V2),
ARM_CPU_OPT ("cortex-a5", "Cortex-A5", ARM_ARCH_V7A,
ARM_FEATURE_CORE_LOW (ARM_EXT_MP | ARM_EXT_SEC),
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-a7", "Cortex-A7", ARM_ARCH_V7VE,
ARM_ARCH_NONE,
FPU_ARCH_NEON_VFP_V4),
@ -31559,13 +31559,13 @@ static const struct arm_cpu_option_table arm_cpus[] =
FPU_ARCH_CRYPTO_NEON_VFP_ARMV8_DOTPROD),
ARM_CPU_OPT ("cortex-r4", "Cortex-R4", ARM_ARCH_V7R,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-r4f", "Cortex-R4F", ARM_ARCH_V7R,
ARM_ARCH_NONE,
FPU_ARCH_VFP_V3D16),
ARM_CPU_OPT ("cortex-r5", "Cortex-R5", ARM_ARCH_V7R,
ARM_FEATURE_CORE_LOW (ARM_EXT_ADIV),
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-r7", "Cortex-R7", ARM_ARCH_V7R,
ARM_FEATURE_CORE_LOW (ARM_EXT_ADIV),
FPU_ARCH_VFP_V3D16),
@ -31580,31 +31580,31 @@ static const struct arm_cpu_option_table arm_cpus[] =
FPU_ARCH_NEON_VFP_ARMV8),
ARM_CPU_OPT ("cortex-m35p", "Cortex-M35P", ARM_ARCH_V8M_MAIN,
ARM_FEATURE_CORE_LOW (ARM_EXT_V5ExP | ARM_EXT_V6_DSP),
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m33", "Cortex-M33", ARM_ARCH_V8M_MAIN,
ARM_FEATURE_CORE_LOW (ARM_EXT_V5ExP | ARM_EXT_V6_DSP),
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m23", "Cortex-M23", ARM_ARCH_V8M_BASE,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m7", "Cortex-M7", ARM_ARCH_V7EM,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m4", "Cortex-M4", ARM_ARCH_V7EM,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m3", "Cortex-M3", ARM_ARCH_V7M,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m1", "Cortex-M1", ARM_ARCH_V6SM,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m0", "Cortex-M0", ARM_ARCH_V6SM,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-m0plus", "Cortex-M0+", ARM_ARCH_V6SM,
ARM_ARCH_NONE,
FPU_NONE),
FPU_ARCH_SOFTVFP),
ARM_CPU_OPT ("cortex-x1", "Cortex-X1", ARM_ARCH_V8_2A,
ARM_FEATURE_CORE_HIGH (ARM_EXT2_FP16_INST | ARM_EXT2_SB),
FPU_ARCH_DOTPROD_NEON_VFP_ARMV8),