diff options
author | Josh Gao <jmgao@google.com> | 2015-08-21 00:25:37 +0000 |
---|---|---|
committer | Josh Gao <jmgao@google.com> | 2015-08-21 00:25:37 +0000 |
commit | 8a444fafc97e5d5d5247aeaa672ee861025fe36b (patch) | |
tree | 119d623eec8f192aa729c69771a3d2efe3506459 /lib/builtins/arm | |
parent | bf7601d58d201ad55e88f15d3c19ef43592faffd (diff) |
Implement __aeabi_c{d,f}{cmpeq,cmple,rcmple}.
Summary: Implement more missing ARM EABI runtime functions.
Reviewers: rengolin, compnerd
Subscribers: pirama, srhines, danalbert, aemerson, llvm-commits
Differential Revision: http://reviews.llvm.org/D12089
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@245648 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/builtins/arm')
-rw-r--r-- | lib/builtins/arm/aeabi_cdcmp.S | 96 | ||||
-rw-r--r-- | lib/builtins/arm/aeabi_cdcmpeq_check_nan.c | 16 | ||||
-rw-r--r-- | lib/builtins/arm/aeabi_cfcmp.S | 91 | ||||
-rw-r--r-- | lib/builtins/arm/aeabi_cfcmpeq_check_nan.c | 16 |
4 files changed, 219 insertions, 0 deletions
diff --git a/lib/builtins/arm/aeabi_cdcmp.S b/lib/builtins/arm/aeabi_cdcmp.S new file mode 100644 index 000000000..036a6f542 --- /dev/null +++ b/lib/builtins/arm/aeabi_cdcmp.S @@ -0,0 +1,96 @@ +//===-- aeabi_cdcmp.S - EABI cdcmp* implementation ------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "../assembly.h" + +#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ +#error big endian support not implemented +#endif + +#define APSR_Z (1 << 30) +#define APSR_C (1 << 29) + +// void __aeabi_cdcmpeq(double a, double b) { +// if (isnan(a) || isnan(b)) { +// Z = 0; C = 1; +// } else { +// __aeabi_cdcmple(a, b); +// } +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cdcmpeq) + push {r0-r3, lr} + bl __aeabi_cdcmpeq_check_nan + cmp r0, #1 + pop {r0-r3, lr} + + // NaN has been ruled out, so __aeabi_cdcmple can't trap + bne __aeabi_cdcmple + + msr CPSR_f, #APSR_C + JMP(lr) +END_COMPILERRT_FUNCTION(__aeabi_cdcmpeq) + + +// void __aeabi_cdcmple(double a, double b) { +// if (__aeabi_dcmplt(a, b)) { +// Z = 0; C = 0; +// } else if (__aeabi_dcmpeq(a, b)) { +// Z = 1; C = 1; +// } else { +// Z = 0; C = 1; +// } +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cdcmple) + // Per the RTABI, this function must preserve r0-r11. + // Save lr in the same instruction for compactness + push {r0-r3, lr} + + bl __aeabi_dcmplt + cmp r0, #1 + moveq ip, #0 + beq 1f + + ldm sp, {r0-r3} + bl __aeabi_dcmpeq + cmp r0, #1 + moveq ip, #(APSR_C | APSR_Z) + movne ip, #(APSR_C) + +1: + msr CPSR_f, ip + pop {r0-r3} + POP_PC() +END_COMPILERRT_FUNCTION(__aeabi_cdcmple) + +// int __aeabi_cdrcmple(double a, double b) { +// return __aeabi_cdcmple(b, a); +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cdrcmple) + // Swap r0 and r2 + mov ip, r0 + mov r0, r2 + mov r2, ip + + // Swap r1 and r3 + mov ip, r1 + mov r1, r3 + mov r3, ip + + b __aeabi_cdcmple +END_COMPILERRT_FUNCTION(__aeabi_cdrcmple) + diff --git a/lib/builtins/arm/aeabi_cdcmpeq_check_nan.c b/lib/builtins/arm/aeabi_cdcmpeq_check_nan.c new file mode 100644 index 000000000..577f6b2c5 --- /dev/null +++ b/lib/builtins/arm/aeabi_cdcmpeq_check_nan.c @@ -0,0 +1,16 @@ +//===-- lib/arm/aeabi_cdcmpeq_helper.c - Helper for cdcmpeq ---------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include <stdint.h> + +__attribute__((pcs("aapcs"))) +__attribute__((visibility("hidden"))) +int __aeabi_cdcmpeq_check_nan(double a, double b) { + return __builtin_isnan(a) || __builtin_isnan(b); +} diff --git a/lib/builtins/arm/aeabi_cfcmp.S b/lib/builtins/arm/aeabi_cfcmp.S new file mode 100644 index 000000000..43594e5c3 --- /dev/null +++ b/lib/builtins/arm/aeabi_cfcmp.S @@ -0,0 +1,91 @@ +//===-- aeabi_cfcmp.S - EABI cfcmp* implementation ------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "../assembly.h" + +#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ +#error big endian support not implemented +#endif + +#define APSR_Z (1 << 30) +#define APSR_C (1 << 29) + +// void __aeabi_cfcmpeq(float a, float b) { +// if (isnan(a) || isnan(b)) { +// Z = 0; C = 1; +// } else { +// __aeabi_cfcmple(a, b); +// } +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cfcmpeq) + push {r0-r3, lr} + bl __aeabi_cfcmpeq_check_nan + cmp r0, #1 + pop {r0-r3, lr} + + // NaN has been ruled out, so __aeabi_cfcmple can't trap + bne __aeabi_cfcmple + + msr CPSR_f, #APSR_C + JMP(lr) +END_COMPILERRT_FUNCTION(__aeabi_cfcmpeq) + + +// void __aeabi_cfcmple(float a, float b) { +// if (__aeabi_fcmplt(a, b)) { +// Z = 0; C = 0; +// } else if (__aeabi_fcmpeq(a, b)) { +// Z = 1; C = 1; +// } else { +// Z = 0; C = 1; +// } +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cfcmple) + // Per the RTABI, this function must preserve r0-r11. + // Save lr in the same instruction for compactness + push {r0-r3, lr} + + bl __aeabi_fcmplt + cmp r0, #1 + moveq ip, #0 + beq 1f + + ldm sp, {r0-r3} + bl __aeabi_fcmpeq + cmp r0, #1 + moveq ip, #(APSR_C | APSR_Z) + movne ip, #(APSR_C) + +1: + msr CPSR_f, ip + pop {r0-r3} + POP_PC() +END_COMPILERRT_FUNCTION(__aeabi_cfcmple) + +// int __aeabi_cfrcmple(float a, float b) { +// return __aeabi_cfcmple(b, a); +// } + + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__aeabi_cfrcmple) + // Swap r0 and r1 + mov ip, r0 + mov r0, r1 + mov r1, ip + + b __aeabi_cfcmple +END_COMPILERRT_FUNCTION(__aeabi_cfrcmple) + diff --git a/lib/builtins/arm/aeabi_cfcmpeq_check_nan.c b/lib/builtins/arm/aeabi_cfcmpeq_check_nan.c new file mode 100644 index 000000000..992e31fbd --- /dev/null +++ b/lib/builtins/arm/aeabi_cfcmpeq_check_nan.c @@ -0,0 +1,16 @@ +//===-- lib/arm/aeabi_cfcmpeq_helper.c - Helper for cdcmpeq ---------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include <stdint.h> + +__attribute__((pcs("aapcs"))) +__attribute__((visibility("hidden"))) +int __aeabi_cfcmpeq_check_nan(float a, float b) { + return __builtin_isnan(a) || __builtin_isnan(b); +} |