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kconfig: Rename CONFIG_FLOAT to CONFIG_FPU

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This commit renames the Kconfig `FLOAT` symbol to `FPU`, since this
symbol only indicates that the hardware Floating Point Unit (FPU) is
used and does not imply and/or indicate the general availability of
toolchain-level floating point support (i.e. this symbol is not
selected when building for an FPU-less platform that supports floating
point operations through the toolchain-provided software floating point
library).

Moreover, given that the symbol that indicates the availability of FPU
is named `CPU_HAS_FPU`, it only makes sense to use "FPU" in the name of
the symbol that enables the FPU.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit is contained in:
Stephanos Ioannidis 2020-04-23 17:27:24 +09:00 • committed by Carles Cufí
commit 0e6ede8929
56 changed files with 114 additions and 115 deletions
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12
arch/riscv/core/isr.S
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@ -144,7 +144,7 @@ SECTION_FUNC(exception.entry, __irq_wrapper)
RV_OP_STOREREG a6, __z_arch_esf_t_a6_OFFSET(sp)
RV_OP_STOREREG a7, __z_arch_esf_t_a7_OFFSET(sp)
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/* Assess whether floating-point registers need to be saved. */
la t0, _kernel
RV_OP_LOADREG t0, _kernel_offset_to_current(t0)
@ -396,7 +396,7 @@ reschedule:
RV_OP_STOREREG s10, _thread_offset_to_s10(t1)
RV_OP_STOREREG s11, _thread_offset_to_s11(t1)
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/* Assess whether floating-point registers need to be saved. */
RV_OP_LOADREG t2, _thread_offset_to_user_options(t1)
andi t2, t2, K_FP_REGS
@ -440,7 +440,7 @@ skip_store_fp_callee_saved:
RV_OP_LOADREG s10, _thread_offset_to_s10(t1)
RV_OP_LOADREG s11, _thread_offset_to_s11(t1)
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/* Determine if we need to restore floating-point registers. */
RV_OP_LOADREG t2, _thread_offset_to_user_options(t1)
andi t2, t2, K_FP_REGS
@ -482,7 +482,7 @@ skip_load_fp_callee_saved:
RV_OP_STOREREG a6, __z_arch_esf_t_a6_OFFSET(sp)
RV_OP_STOREREG a7, __z_arch_esf_t_a7_OFFSET(sp)
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/* Assess whether floating-point registers need to be saved. */
RV_OP_LOADREG t2, _thread_offset_to_user_options(sp)
andi t2, t2, K_FP_REGS
@ -495,7 +495,7 @@ skip_store_fp_caller_saved_benchmark:
call read_timer_end_of_swap
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/* Determine if we need to restore floating-point registers. */
RV_OP_LOADREG t2, __z_arch_esf_t_fp_state_OFFSET(sp)
beqz t2, skip_load_fp_caller_saved_benchmark
@ -542,7 +542,7 @@ no_reschedule:
RV_OP_LOADREG t0, __z_arch_esf_t_mstatus_OFFSET(sp)
csrw mstatus, t0
#if defined(CONFIG_FLOAT) && defined(CONFIG_FP_SHARING)
#if defined(CONFIG_FPU) && defined(CONFIG_FP_SHARING)
/*
* Determine if we need to restore floating-point registers. This needs
* to happen before restoring integer registers to avoid stomping on