From 1d3daf95254d998b91445c48de875796df3b0998 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Tue, 23 May 2023 14:11:07 +0100 Subject: softfloat: use QEMU_FLATTEN to avoid mistaken isra inlining MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Balton discovered that asserts for the extract/deposit calls had a significant impact on a lame benchmark on qemu-ppc. Replicating with: ./qemu-ppc64 ~/lsrc/tests/lame.git-svn/builds/ppc64/frontend/lame \ -h pts-trondheim-3.wav pts-trondheim-3.mp3 showed up the pack/unpack routines not eliding the assert checks as it should have done causing them to prominently figure in the profile:  11.44%  qemu-ppc64  qemu-ppc64               [.] unpack_raw64.isra.0  11.03%  qemu-ppc64  qemu-ppc64               [.] parts64_uncanon_normal   8.26%  qemu-ppc64  qemu-ppc64               [.] helper_compute_fprf_float64   6.75%  qemu-ppc64  qemu-ppc64               [.] do_float_check_status   5.34%  qemu-ppc64  qemu-ppc64               [.] parts64_muladd   4.75%  qemu-ppc64  qemu-ppc64               [.] pack_raw64.isra.0   4.38%  qemu-ppc64  qemu-ppc64               [.] parts64_canonicalize   3.62%  qemu-ppc64  qemu-ppc64               [.] float64r32_round_pack_canonical After this patch the same test runs 31 seconds faster with a profile where the generated code dominates more: + 14.12% 0.00% qemu-ppc64 [unknown] [.] 0x0000004000619420 + 13.30% 0.00% qemu-ppc64 [unknown] [.] 0x0000004000616850 + 12.58% 12.19% qemu-ppc64 qemu-ppc64 [.] parts64_uncanon_normal + 10.62% 0.00% qemu-ppc64 [unknown] [.] 0x000000400061bf70 + 9.91% 9.73% qemu-ppc64 qemu-ppc64 [.] helper_compute_fprf_float64 + 7.84% 7.82% qemu-ppc64 qemu-ppc64 [.] do_float_check_status + 6.47% 5.78% qemu-ppc64 qemu-ppc64 [.] parts64_canonicalize.constprop.0 + 6.46% 0.00% qemu-ppc64 [unknown] [.] 0x0000004000620130 + 6.42% 0.00% qemu-ppc64 [unknown] [.] 0x0000004000619400 + 6.17% 6.04% qemu-ppc64 qemu-ppc64 [.] parts64_muladd + 5.85% 0.00% qemu-ppc64 [unknown] [.] 0x00000040006167e0 + 5.74% 0.00% qemu-ppc64 [unknown] [.] 0x0000b693fcffffd3 + 5.45% 4.78% qemu-ppc64 qemu-ppc64 [.] float64r32_round_pack_canonical Suggested-by: Richard Henderson Message-Id: [AJB: Patchified rth's suggestion] Signed-off-by: Alex Bennée Cc: BALATON Zoltan Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Tested-by: BALATON Zoltan Message-Id: <20230523131107.3680641-1-alex.bennee@linaro.org> Signed-off-by: Richard Henderson --- fpu/softfloat.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'fpu') diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 108f9cb224..42e6c188b4 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -593,27 +593,27 @@ static void unpack_raw64(FloatParts64 *r, const FloatFmt *fmt, uint64_t raw) }; } -static inline void float16_unpack_raw(FloatParts64 *p, float16 f) +static void QEMU_FLATTEN float16_unpack_raw(FloatParts64 *p, float16 f) { unpack_raw64(p, &float16_params, f); } -static inline void bfloat16_unpack_raw(FloatParts64 *p, bfloat16 f) +static void QEMU_FLATTEN bfloat16_unpack_raw(FloatParts64 *p, bfloat16 f) { unpack_raw64(p, &bfloat16_params, f); } -static inline void float32_unpack_raw(FloatParts64 *p, float32 f) +static void QEMU_FLATTEN float32_unpack_raw(FloatParts64 *p, float32 f) { unpack_raw64(p, &float32_params, f); } -static inline void float64_unpack_raw(FloatParts64 *p, float64 f) +static void QEMU_FLATTEN float64_unpack_raw(FloatParts64 *p, float64 f) { unpack_raw64(p, &float64_params, f); } -static void floatx80_unpack_raw(FloatParts128 *p, floatx80 f) +static void QEMU_FLATTEN floatx80_unpack_raw(FloatParts128 *p, floatx80 f) { *p = (FloatParts128) { .cls = float_class_unclassified, @@ -623,7 +623,7 @@ static void floatx80_unpack_raw(FloatParts128 *p, floatx80 f) }; } -static void float128_unpack_raw(FloatParts128 *p, float128 f) +static void QEMU_FLATTEN float128_unpack_raw(FloatParts128 *p, float128 f) { const int f_size = float128_params.frac_size - 64; const int e_size = float128_params.exp_size; @@ -650,27 +650,27 @@ static uint64_t pack_raw64(const FloatParts64 *p, const FloatFmt *fmt) return ret; } -static inline float16 float16_pack_raw(const FloatParts64 *p) +static float16 QEMU_FLATTEN float16_pack_raw(const FloatParts64 *p) { return make_float16(pack_raw64(p, &float16_params)); } -static inline bfloat16 bfloat16_pack_raw(const FloatParts64 *p) +static bfloat16 QEMU_FLATTEN bfloat16_pack_raw(const FloatParts64 *p) { return pack_raw64(p, &bfloat16_params); } -static inline float32 float32_pack_raw(const FloatParts64 *p) +static float32 QEMU_FLATTEN float32_pack_raw(const FloatParts64 *p) { return make_float32(pack_raw64(p, &float32_params)); } -static inline float64 float64_pack_raw(const FloatParts64 *p) +static float64 QEMU_FLATTEN float64_pack_raw(const FloatParts64 *p) { return make_float64(pack_raw64(p, &float64_params)); } -static float128 float128_pack_raw(const FloatParts128 *p) +static float128 QEMU_FLATTEN float128_pack_raw(const FloatParts128 *p) { const int f_size = float128_params.frac_size - 64; const int e_size = float128_params.exp_size; -- cgit v1.2.3